Development ¶
This chapter provides hints on Icinga 2 debugging, development, package builds and tests.
- Debug Icinga 2
- Test Icinga 2
- Develop Icinga 2
- Development Environment
- Package Builds
- Continuous Integration
- Advanced Tips
Debug Icinga 2 ¶
This chapter targets all users who have been asked by developers to provide a stack trace or coredump if the application crashed. It is also useful for developers working with different debuggers.
Note:
This is intentionally mentioned before any development insights as debugging is a more frequent and commonly asked question.
Debug Requirements ¶
Make sure that the debug symbols are available for Icinga 2.
The Icinga 2 packages provide a debug package which must be
installed separately for all involved binaries, like icinga2-bin
or icinga2-ido-mysql
.
Distribution | Command |
---|---|
Debian/Ubuntu | apt-get install icinga2-dbg |
RHEL | yum install icinga2-debuginfo |
Fedora | dnf install icinga2-debuginfo icinga2-bin-debuginfo icinga2-ido-mysql-debuginfo |
SLES/openSUSE | zypper install icinga2-bin-debuginfo icinga2-ido-mysql-debuginfo |
Furthermore, you may also have to install debug symbols for Boost and your C++ library.
If you’re building your own binaries, you should use the -DCMAKE_BUILD_TYPE=Debug
cmake
build flag for debug builds.
GDB as Debugger ¶
Install GDB in your development environment.
Distribution | Command |
---|---|
Debian/Ubuntu | apt-get install gdb |
RHEL | yum install gdb |
Fedora | dnf install gdb |
SLES/openSUSE | zypper install gdb |
GDB Run ¶
Run the icinga2 binary /usr/lib{,64}/icinga2/sbin/icinga2
with gdb, /usr/bin/icinga2
is a shell wrapper.
gdb --args /usr/lib/icinga2/sbin/icinga2 daemon
(gdb) set follow-fork-mode child
When gdb halts on SIGUSR2, press c
to continue. This signal originates from the umbrella
process and can safely be ignored.
Note
Since v2.11 we would attach to the umbrella process spawned with
/usr/lib/icinga2/sbin/icinga2
, therefore rather attach to a running process.# Typically the order of PIDs is: 1) umbrella 2) spawn helper 3) main process pidof icinga2 gdb -p $(pidof icinga2 | cut -d ' ' -f3)
Note
If gdb tells you it’s missing debug symbols, quit gdb and install them:
Missing separate debuginfos, use: debuginfo-install ...
Run/restart the application.
(gdb) r
Kill the running application.
(gdb) k
Continue after breakpoint.
(gdb) c
GDB Core Dump ¶
Either attach to the running process using gdb -p PID
or start
a new gdb run.
(gdb) r
(gdb) generate-core-file
GDB Backtrace ¶
If Icinga 2 aborted its operation abnormally, generate a backtrace.
Note
Please install the required debug symbols prior to generating a backtrace.
thread apply all
is important here since this includes all running threads.
We need this information when e.g. debugging dead locks and hanging features.
(gdb) bt
(gdb) thread apply all bt full
If gdb stops at a SIGPIPE signal please disable the signal before running Icinga 2. This isn’t an error, but we need to workaround it.
(gdb) handle SIGPIPE nostop noprint pass
(gdb) r
If you create a new issue, make sure to attach as much detail as possible.
GDB Backtrace from Running Process ¶
If Icinga 2 is still running, generate a full backtrace from the running process and store it into a new file (e.g. for debugging dead locks).
Note
Please install the required debug symbols prior to generating a backtrace.
Icinga 2 runs with 2 processes: main and command executor, therefore generate two backtrace logs and add them to the GitHub issue.
for pid in $(pidof icinga2); do gdb -p $pid -batch -ex "thread apply all bt full" -ex "detach" -ex "q" > gdb_bt_${pid}_`date +%s`.log; done
GDB Thread List from Running Process ¶
Instead of a full backtrace, you sometimes just need a list of running threads.
for pid in $(pidof icinga2); do gdb -p $pid -batch -ex "info threads" -ex "detach" -ex "q" > gdb_threads_${pid}_`date +%s`.log; done
GDB Backtrace Stepping ¶
Identifying the problem may require stepping into the backtrace, analysing
the current scope, attributes, and possible unmet requirements. p
prints
the value of the selected variable or function call result.
(gdb) up
(gdb) down
(gdb) p checkable
(gdb) p checkable.px->m_Name
GDB Breakpoints ¶
To set a breakpoint to a specific function call, or file specific line.
(gdb) b checkable.cpp:125
(gdb) b icinga::Checkable::SetEnablePerfdata
GDB will ask about loading the required symbols later, select yes
instead
of no
.
Then run Icinga 2 until it reaches the first breakpoint. Continue with c
afterwards.
(gdb) run
(gdb) c
In case you want to step into the next line of code, use n
. If there is a
function call where you want to step into, use s
.
(gdb) n
(gdb) s
If you want to delete all breakpoints, use d
and select yes
.
(gdb) d
Tip
When debugging exceptions, set your breakpoint like this:
b __cxa_throw
.
Breakpoint Example:
(gdb) b __cxa_throw
(gdb) r
(gdb) up
....
(gdb) up
#11 0x00007ffff7cbf9ff in icinga::Utility::GlobRecursive(icinga::String const&, icinga::String const&, boost::function<void (icinga::String const&)> const&, int) (path=..., pattern=..., callback=..., type=1)
at /home/michi/coding/icinga/icinga2/lib/base/utility.cpp:609
609 callback(cpath);
(gdb) l
604
605 #endif /* _WIN32 */
606
607 std::sort(files.begin(), files.end());
608 BOOST_FOREACH(const String& cpath, files) {
609 callback(cpath);
610 }
611
612 std::sort(dirs.begin(), dirs.end());
613 BOOST_FOREACH(const String& cpath, dirs) {
(gdb) p files
$3 = std::vector of length 11, capacity 16 = {{static NPos = 18446744073709551615, m_Data = "/etc/icinga2/conf.d/agent.conf"}, {static NPos = 18446744073709551615,
m_Data = "/etc/icinga2/conf.d/commands.conf"}, {static NPos = 18446744073709551615, m_Data = "/etc/icinga2/conf.d/downtimes.conf"}, {static NPos = 18446744073709551615,
m_Data = "/etc/icinga2/conf.d/groups.conf"}, {static NPos = 18446744073709551615, m_Data = "/etc/icinga2/conf.d/notifications.conf"}, {static NPos = 18446744073709551615,
m_Data = "/etc/icinga2/conf.d/satellite.conf"}, {static NPos = 18446744073709551615, m_Data = "/etc/icinga2/conf.d/services.conf"}, {static NPos = 18446744073709551615,
m_Data = "/etc/icinga2/conf.d/templates.conf"}, {static NPos = 18446744073709551615, m_Data = "/etc/icinga2/conf.d/test.conf"}, {static NPos = 18446744073709551615,
m_Data = "/etc/icinga2/conf.d/timeperiods.conf"}, {static NPos = 18446744073709551615, m_Data = "/etc/icinga2/conf.d/users.conf"}}
Core Dump ¶
When the Icinga 2 daemon crashes with a SIGSEGV
signal
a core dump file should be written. This will help
developers to analyze and fix the problem.
Core Dump File Size Limit ¶
This requires setting the core dump file size to unlimited
.
Systemd¶
systemctl edit icinga2.service
[Service]
...
LimitCORE=infinity
systemctl daemon-reload
systemctl restart icinga2
Init Script¶
vim /etc/init.d/icinga2
...
ulimit -c unlimited
service icinga2 restart
Verify¶
Verify that the Icinga 2 process core file size limit is set to unlimited
.
for pid in $(pidof icinga2); do cat /proc/$pid/limits; done
...
Max core file size unlimited unlimited bytes
Core Dump Kernel Format ¶
The Icinga 2 daemon runs with the SUID bit set. Therefore you need to explicitly enable core dumps for SUID on Linux.
sysctl -w fs.suid_dumpable=2
Adjust the coredump kernel format and file location on Linux:
sysctl -w kernel.core_pattern=/var/lib/cores/core.%e.%p
install -m 1777 -d /var/lib/cores
MacOS:
sysctl -w kern.corefile=/cores/core.%P
chmod 777 /cores
Core Dump Analysis ¶
Once Icinga 2 crashes again a new coredump file will be written. Please attach this file to your bug report in addition to the general details.
Simple test case for a SIGSEGV
simulation with sleep
:
ulimit -c unlimited
sleep 1800&
[1] <PID>
kill -SEGV <PID>
gdb `which sleep` /var/lib/cores/core.sleep.<PID>
(gdb) bt
rm /var/lib/cores/core.sleep.*
Analyzing Icinga 2:
gdb /usr/lib64/icinga2/sbin/icinga2 core.icinga2.<PID>
(gdb) bt
LLDB as Debugger ¶
LLDB is available on macOS with the Xcode command line tools.
xcode-select --install
In order to run Icinga 2 with LLDB you need to pass the binary as argument. Since v2.11 we would attach to the umbrella process, therefore rather attach to a running process.
# Typically the order of PIDs is: 1) umbrella 2) spawn helper 3) main process
pidof icinga2
lldb -p $(pidof icinga2 | cut -d ' ' -f3)
In case you’ll need to attach to the main process immediately, you can delay the forked child process and attach to the printed PID.
$ icinga2 daemon -DInternal.DebugWorkerDelay=120
Closed FD 6 which we inherited from our parent process.
[2020-01-29 12:22:33 +0100] information/cli: Icinga application loader (version: v2.11.0-477-gfe8701d77; debug)
[2020-01-29 12:22:33 +0100] information/RunWorker: DEBUG: Current PID: 85253. Sleeping for 120 seconds to allow lldb/gdb -p <PID> attachment.
lldb -p 85253
When lldb halts on SIGUSR2, press c
to continue. This signal originates from the umbrella
process and can safely be ignored.
Breakpoint:
> b checkable.cpp:57
> b icinga::Checkable::ProcessCheckResult
Full backtrace:
> bt all
Select thread:
> thr sel 5
Step into:
> s
Next step:
> n
Continue:
> c
Up/down in stacktrace:
> up
> down
Debug on Windows ¶
Whenever the application crashes, the Windows error reporting (WER) can be configured to create user-mode dumps.
Tail the log file with Powershell:
Get-Content .\icinga2.log -tail 10 -wait
Debug on Windows: Dependencies ¶
Similar to ldd
or nm
on Linux/Unix.
Extract the dependent DLLs from a binary with Visual Studio’s dumpbin
tool
in Powershell:
C:> &'C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.22.27905\bin\Hostx64\x64\dumpbin.exe' /dependents .\debug\Bin\Debug\Debug\boosttest-test-base.exe
DEBUG: 1+ >>>> &'C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.22.27905\bin\Hostx64\x64\dumpbin.exe' /dependents .\debug\Bin\Debug\Debug\boosttest-test-base.exe
Microsoft (R) COFF/PE Dumper Version 14.22.27905.0
Copyright (C) Microsoft Corporation. All rights reserved.
Dump of file .\debug\Bin\Debug\Debug\boosttest-test-base.exe
File Type: EXECUTABLE IMAGE
Image has the following dependencies:
boost_coroutine-vc142-mt-gd-x64-1_85.dll
boost_date_time-vc142-mt-gd-x64-1_85.dll
boost_filesystem-vc142-mt-gd-x64-1_85.dll
boost_thread-vc142-mt-gd-x64-1_85.dll
boost_regex-vc142-mt-gd-x64-1_85.dll
libssl-3_0-x64.dll
libcrypto-3_0-x64.dll
WS2_32.dll
dbghelp.dll
SHLWAPI.dll
msi.dll
boost_unit_test_framework-vc142-mt-gd-x64-1_85.dll
KERNEL32.dll
SHELL32.dll
ADVAPI32.dll
MSVCP140D.dll
MSWSOCK.dll
bcrypt.dll
VCRUNTIME140D.dll
ucrtbased.dll
Summary
1000 .00cfg
68000 .data
B000 .idata
148000 .pdata
69C000 .rdata
25000 .reloc
1000 .rsrc
E7A000 .text
1000 .tls
Test Icinga 2 ¶
Snapshot Packages (Nightly Builds) ¶
Icinga provides snapshot packages as nightly builds from Git master.
These packages contain development code which should be considered “work in progress”. While developers ensure that tests are running fine with CI actions on PRs, things might break, or changes are not yet documented in the changelog.
You can help the developers and test the snapshot packages, e.g. when larger changes or rewrites are taking place for a new major version. Your feedback is very much appreciated.
Snapshot packages are available for all supported platforms including Linux and Windows and can be obtained from https://packages.icinga.com.
The Vagrant boxes also use the Icinga snapshot packages to allow easier integration tests. It is also possible to use Docker with base OS images and installing the snapshot packages.
If you encounter a problem, please open a new issue on GitHub and mention that you’re testing the snapshot packages.
RHEL ¶
2.11+ requires the EPEL repository for Boost 1.66+.
In addition to that, the icinga-rpm-release
package already provides the icinga-snapshot-builds
repository but it is disabled by default.
yum -y install https://packages.icinga.com/epel/icinga-rpm-release-7-latest.noarch.rpm
yum -y install epel-release
yum makecache
yum install --enablerepo=icinga-snapshot-builds icinga2
Debian ¶
2.11+ requires Boost 1.66+ which either is provided by the OS, backports or Icinga stable repositories.
It is advised to configure both Icinga repositories, stable and snapshot and selectively
choose the repository with the -t
flag on apt-get install
.
apt-get update
apt-get -y install apt-transport-https wget gnupg
wget -O - https://packages.icinga.com/icinga.key | apt-key add -
DIST=$(awk -F"[)(]+" '/VERSION=/ {print $2}' /etc/os-release); \
echo "deb https://packages.icinga.com/debian icinga-${DIST} main" > \
/etc/apt/sources.list.d/${DIST}-icinga.list
echo "deb-src https://packages.icinga.com/debian icinga-${DIST} main" >> \
/etc/apt/sources.list.d/${DIST}-icinga.list
DIST=$(awk -F"[)(]+" '/VERSION=/ {print $2}' /etc/os-release); \
echo "deb http://packages.icinga.com/debian icinga-${DIST}-snapshots main" > \
/etc/apt/sources.list.d/${DIST}-icinga-snapshots.list
echo "deb-src http://packages.icinga.com/debian icinga-${DIST}-snapshots main" >> \
/etc/apt/sources.list.d/${DIST}-icinga-snapshots.list
apt-get update
On Debian Stretch, you’ll also need to add Debian Backports.
DIST=$(awk -F"[)(]+" '/VERSION=/ {print $2}' /etc/os-release); \
echo "deb https://deb.debian.org/debian ${DIST}-backports main" > \
/etc/apt/sources.list.d/${DIST}-backports.list
apt-get update
Then install the snapshot packages.
DIST=$(awk -F"[)(]+" '/VERSION=/ {print $2}' /etc/os-release); \
apt-get install -t icinga-${DIST}-snapshots icinga2
Ubuntu ¶
apt-get update
apt-get -y install apt-transport-https wget gnupg
wget -O - https://packages.icinga.com/icinga.key | apt-key add -
. /etc/os-release; if [ ! -z ${UBUNTU_CODENAME+x} ]; then DIST="${UBUNTU_CODENAME}"; else DIST="$(lsb_release -c| awk '{print $2}')"; fi; \
echo "deb https://packages.icinga.com/ubuntu icinga-${DIST} main" > \
/etc/apt/sources.list.d/${DIST}-icinga.list
echo "deb-src https://packages.icinga.com/ubuntu icinga-${DIST} main" >> \
/etc/apt/sources.list.d/${DIST}-icinga.list
. /etc/os-release; if [ ! -z ${UBUNTU_CODENAME+x} ]; then DIST="${UBUNTU_CODENAME}"; else DIST="$(lsb_release -c| awk '{print $2}')"; fi; \
echo "deb https://packages.icinga.com/ubuntu icinga-${DIST}-snapshots main" > \
/etc/apt/sources.list.d/${DIST}-icinga-snapshots.list
echo "deb-src https://packages.icinga.com/ubuntu icinga-${DIST}-snapshots main" >> \
/etc/apt/sources.list.d/${DIST}-icinga-snapshots.list
apt-get update
Then install the snapshot packages.
. /etc/os-release; if [ ! -z ${UBUNTU_CODENAME+x} ]; then DIST="${UBUNTU_CODENAME}"; else DIST="$(lsb_release -c| awk '{print $2}')"; fi; \
apt-get install -t icinga-${DIST}-snapshots icinga2
SLES ¶
The required Boost packages are provided with the stable release repository.
rpm --import https://packages.icinga.com/icinga.key
zypper ar https://packages.icinga.com/SUSE/ICINGA-release.repo
zypper ref
zypper ar https://packages.icinga.com/SUSE/ICINGA-snapshot.repo
zypper ref
Selectively install the snapshot packages using the -r
parameter.
zypper in -r icinga-snapshot-builds icinga2
Unit Tests ¶
Build the binaries and run the tests.
make -j4 -C debug
make test -C debug
Run a specific boost test:
debug/Bin/Debug/boosttest-test-base --run_test=remote_url
Develop Icinga 2 ¶
Icinga 2 can be built on many platforms such as Linux, Unix and Windows. There are limitations in terms of support, e.g. Windows is only supported for agents, not a full-featured master or satellite.
Before you start with actual development, there is a couple of pre-requisites.
Preparations ¶
Choose your Editor ¶
Icinga 2 can be developed with your favorite editor. Icinga developers prefer these tools:
- vim
- CLion (macOS, Linux)
- MS Visual Studio (Windows)
- Atom
Editors differ on the functionality. The more helpers you get for C++ development, the faster your development workflow will be.
Get to know the architecture ¶
Icinga 2 can run standalone or in distributed environments. It contains a whole lot more than a simple check execution engine.
Read more about it in the Technical Concepts chapter.
Get to know the code ¶
First off, you really need to know C++ and portions of C++17 and the boost libraries. Best is to start with a book or online tutorial to get into the basics. Icinga developers gained their knowledge through studies, training and self-teaching code by trying it out and asking senior developers for guidance.
Here’s a few books we can recommend:
- Accelerated C++: Practical Programming by Example (Andrew Koenig, Barbara E. Moo)
- Effective C++ (Scott Meyers)
- Boost C++ Application Development Cookbook - Second Edition: Recipes to simplify your application development (Antony Polukhin)
- Der C++ Programmierer, German (Ulrich Breymann)
- C++11 programmieren, German (Torsten T. Will)
In addition, it is a good bet to also know SQL when diving into backend development.
- SQL Performance Explained (Markus Winand)
Last but not least, if you are developing on Windows, get to know the internals about services and the Win32 API.
Design Patterns ¶
Icinga 2 heavily relies on object-oriented programming and encapsulates common functionality into classes and objects. It also uses modern programming techniques to e.g. work with shared pointer memory management.
Icinga 2 consists of libraries bundled into the main binary. Therefore you’ll
find many code parts in the lib/
directory wheras the actual application is
built from icinga-app/
. Accompanied with Icinga 2, there’s the Windows plugins
which are standalone and compiled from plugins/
.
Library | Description |
---|---|
base | Objects, values, types, streams, tockets, TLS, utilities, etc. |
config | Configuration compiler, expressions, etc. |
cli | CLI (sub) commands and helpers. |
icinga | Icinga specific objects and event handling. |
remote | Cluster and HTTP client/server and REST API related code. |
checker | Checker feature, check scheduler. |
notification | Notification feature, notification scheduler. |
methods | Command execution methods, plugins and built-in checks. |
perfdata | Performance data related, including Graphite, Elastic, etc. |
db_ido | IDO database abstraction layer. |
db_ido_mysql | IDO database driver for MySQL. |
db_ido_pgsql | IDO database driver for PgSQL. |
mysql_shin | Library stub for linking against the MySQL client libraries. |
pgsql_shim | Library stub for linking against the PgSQL client libraries. |
Class Compiler ¶
Another thing you will recognize are the .ti
files which are compiled
by our own class compiler into actual source code. The meta language allows
developers to easily add object attributes and specify their behaviour.
Some object attributes need to be stored over restarts in the state file
and therefore have the state
attribute set. Others are treated as config
attribute and automatically get configuration validation functions created.
Hidden or read-only REST API attributes are marked with no_user_view
and
no_user_modify
.
The most beneficial thing are getters and setters being generated. The actual object
inherits from ObjectImpl<TYPE>
and therefore gets them “for free”.
Example:
vim lib/perfdata/gelfwriter.ti
[config] enable_tls;
vim lib/perfdata/gelfwriter.cpp
if (GetEnableTls()) {
The logic is hidden in tools/mkclass/
in case you want to learn more about it.
The first steps during CMake & make also tell you about code generation.
Build Tools ¶
CMake ¶
In its early development stages in 2012, Icinga 2 was built with autoconf/automake and separate Windows project files. We’ve found this very fragile, and have changed this into CMake as our build tool.
The most common benefits:
- Everything is described in CMakeLists.txt in each directory
- CMake only needs to know that a sub directory needs to be included.
- The global CMakeLists.txt acts as main entry point for requirement checks and library/header includes.
- Separate binary build directories, the actual source tree stays clean.
- CMake automatically generates a Visual Studio project file
icinga2.sln
on Windows.
Unity Builds ¶
Another thing you should be aware of: Unity builds on and off.
Typically, we already use caching mechanisms to reduce recompile time with ccache. For release builds, there’s always a new build needed as the difference is huge compared to a previous (major) release.
Therefore we’ve invented the Unity builds, which basically concatenates all source files into one big library source code file. The compiler then doesn’t need to load the many small files but compiles and links this huge one.
Unity builds require more memory which is why you should disable them for development builds in small sized VMs (Linux, Windows) and also Docker containers.
There’s a couple of header files which are included everywhere. If you touch/edit them,
the cache is invalidated and you need to recompile a lot more files then. base/utility.hpp
and remote/zone.hpp
are good candidates for this.
Unit Tests ¶
New functions and classes must implement new unit tests. Whenever you decide to add new functions, ensure that you don’t need a complex mock or runtime attributes in order to test them. Better isolate code into function interfaces which can be invoked in the Boost tests framework.
Look into the existing tests in the test/ directory and adopt new test cases.
Specific tests require special time windows, they are only enabled in debug builds for developers. This is the case e.g. for testing the flapping algorithm with expected state change detection at a specific point from now.
Style Guide ¶
Overview of project files:
File Type | File Name/Extension | Description |
---|---|---|
Header | .hpp | Classes, enums, typedefs inside the icinga Namespace. |
Source | .cpp | Method implementation for class functions, static/global variables. |
CMake | CMakeLists.txt | Build configuration, source and header file references. |
CMake Source | .cmake | Source/Header files generated from CMake placeholders. |
ITL/conf.d | .conf | Template library and example files as configuration |
Class Compiler | .ti | Object classes in our own language, generates source code as <filename>-ti.{c,h}pp . |
Lexer/Parser | .ll, .yy | Flex/Bison code generated into source code from CMake builds. |
Docs | .md | Markdown docs and READMEs. |
Anything else are additional tools and scripts for developers and build systems.
All files must include the copyright header. We don’t use the current year as this implies yearly updates we don’t want.
Depending on the file type, this must be a comment.
/* Icinga 2 | (c) 2012 Icinga GmbH | GPLv2+ */
# Icinga 2 | (c) 2012 Icinga GmbH | GPLv2+
Code Formatting ¶
Tabs instead of spaces. Inside Visual Studio, choose to keep tabs instead of spaces. Tabs should use 4 spaces indent by default, depending on your likings.
We follow the clang format, with some exceptions.
- Curly braces for functions and classes always start at a new line.
String ConfigObjectUtility::EscapeName(const String& name)
{
//...
}
String ConfigObjectUtility::CreateObjectConfig(const Type::Ptr& type, const String& fullName,
bool ignoreOnError, const Array::Ptr& templates, const Dictionary::Ptr& attrs)
{
//...
}
- Too long lines break at a parameter, the new line needs a tab indent.
static String CreateObjectConfig(const Type::Ptr& type, const String& fullName,
bool ignoreOnError, const Array::Ptr& templates, const Dictionary::Ptr& attrs);
- Conditions require curly braces if it is not a single if with just one line.
if (s == "OK") {
//...
} else {
//...
}
if (!n)
return;
- There’s a space between
if
and the opening brace(
. Also after the closing brace)
and opening curly brace{
. - Negation with
!
doesn’t need an extra space. - Else branches always start in the same line after the closing curly brace.
Code Comments ¶
Add comments wherever you think that another developer will have a hard time to understand the complex algorithm. Or you might have forgotten it in a year and struggle again. Also use comments to highlight specific stages in a function. Generally speaking, make things easier for the team and external contributors.
Comments can also be used to mark additional references and TODOs. If there is a specific GitHub issue or discussion going on, use that information as a summary and link over to it on purpose.
- Single line comments may use
//
or/* ... */
- Multi line comments must use this format:
/* Ensure to check for XY
* This relies on the fact that ABC has been set before.
*/
Function Docs ¶
Function header documentation must be added. The current code basis needs rework, future functions must provide this.
Editors like CLion or Visual Studio allow you to type /**
followed
by Enter and generate the skeleton from the implemented function.
Add a short summary in the first line about the function’s purpose.
Edit the param section with short description on their intention.
The return
value should describe the value type and additional details.
Example:
/**
* Reads a message from the connected peer.
*
* @param stream ASIO TLS Stream
* @param yc Yield Context for ASIO
* @param maxMessageLength maximum size of bytes read.
*
* @return A JSON string
*/
String JsonRpc::ReadMessage(const std::shared_ptr<AsioTlsStream>& stream, boost::asio::yield_context yc, ssize_t maxMessageLength)
While we can generate code docs from it, the main idea behind it is to provide on-point docs to fully understand all parameters and the function’s purpose in the same spot.
Header ¶
Only include other headers which are mandatory for the header definitions. If the source file requires additional headers, add them there to avoid include loops.
The included header order is important.
- First, include the library header
i2-<libraryname>.hpp
, e.g.i2-base.hpp
. - Second, include all headers from Icinga itself, e.g.
remote/apilistener.hpp
.base
beforeicinga
beforeremote
, etc. - Third, include third-party and external library headers, e.g. openssl and boost.
- Fourth, include STL headers.
Source ¶
The included header order is important.
- First, include the header whose methods are implemented.
- Second, include all headers from Icinga itself, e.g.
remote/apilistener.hpp
.base
beforeicinga
beforeremote
, etc. - Third, include third-party and external library headers, e.g. openssl and boost.
- Fourth, include STL headers.
Always use an empty line after the header include parts.
Namespace ¶
The icinga namespace is used globally, as otherwise we would need to write icinga::Utility::FormatDateTime()
.
using namespace icinga;
Other namespaces must be declared in the scope they are used. Typically
this is inside the function where boost::asio
and variants would
complicate the code.
namespace ssl = boost::asio::ssl;
auto context (std::make_shared<ssl::context>(ssl::context::sslv23));
Functions ¶
Ensure to pass values and pointers as const reference. By default, all values will be copied into the function scope, and we want to avoid this wherever possible.
std::vector<EventQueue::Ptr> EventQueue::GetQueuesForType(const String& type)
C++ only allows to return a single value. This can be abstracted with returning a specific class object, or with using a map/set. Array and Dictionary objects increase the memory footprint, use them only where needed.
A common use case for Icinga value types is where a function can return different values - an object, an array, a boolean, etc. This happens in the inner parts of the config compiler expressions, or config validation.
The function caller is responsible to determine the correct value type and handle possible errors.
Specific algorithms may require to populate a list, which can be passed by reference to the function. The inner function can then append values. Do not use a global shared resource here, unless this is locked by the caller.
Conditions and Cases ¶
Prefer if-else-if-else branches. When integers are involved,
switch-case statements increase readability. Don’t forget about break
though!
Avoid using ternary operators where possible. Putting a condition after an assignment complicates reading the source. The compiler optimizes this anyways.
Wrong:
int res = s == "OK" ? 0 : s == "WARNING" ? 1;
return res;
Better:
int res = 3;
if (s == "OK") {
res = 0;
} else if (s == "WARNING") {
res = 1;
}
Even better: Create a lookup map instead of if branches. The complexity is reduced to O(log(n)).
std::map<String, unsigned int> stateMap = {
{ "OK", 1 },
{ "WARNING", 2 }
}
auto it = stateMap.find(s);
if (it == stateMap.end()) {
return 3
}
return it.second;
The code is not as short as with a ternary operator, but one can re-use this design pattern for other generic definitions with e.g. moving the lookup into a utility class.
Once a unit test is written, everything works as expected in the future.
Locks and Guards ¶
Lock access to resources where multiple threads can read and write.
Icinga objects can be locked with the ObjectLock
class.
Object locks and guards must be limited to the scope where they are needed. Otherwise we could create dead locks.
{
ObjectLock olock(frame.Locals);
for (const Dictionary::Pair& kv : frame.Locals) {
AddSuggestion(matches, word, kv.first);
}
}
Objects and Pointers ¶
Use shared pointers for objects. Icinga objects implement the Ptr
typedef returning an intrusive_ptr
for the class object (object.hpp).
This also ensures reference counting for the object’s lifetime.
Use raw pointers with care!
Some methods and classes require specific shared pointers, especially when interacting with the Boost library.
Value Types ¶
Icinga has its own value types. These provide methods to allow generic serialization into JSON for example, and other type methods which are made available in the DSL too.
- Always use
String
instead ofstd::string
. If you need a C-string, use theCStr()
method. - Avoid casts and rather use the
Convert
class methods.
double s = static_cast<double>(v); //Wrong
double s = Convert::ToDouble(v); //Correct, ToDouble also provides overloads with different value types
- Prefer STL containers for internal non-user interfaces. Icinga value types add a small overhead which may decrease performance if e.g. the function is called 100k times.
Array::FromVector
and variants implement conversions, use them.
Utilities ¶
Don’t re-invent the wheel. The Utility
class provides
many helper functions which allow you e.g. to format unix timestamps,
search in filesystem paths.
Also inspect the Icinga objects, they also provide helper functions for formatting, splitting strings, joining arrays into strings, etc.
Libraries ¶
2.11 depends on Boost 1.66. Use the existing libraries and header-only includes for this specific version.
Note: Prefer C++17 features where possible, e.g. std::atomic and lambda functions.
General:
- exception (header only)
- algorithm (header only)
- lexical_cast (header only)
- regex
- uuid (header only)
- range (header only)
- variant (header only)
- multi_index (header only)
- function_types (header only)
- circular_buffer (header only)
- math (header only)
- stacktrace (header only)
Events and Runtime:
- system
- thread
- signals2 (header only)
- program_options
- date_time
- filesystem
Network I/O:
Consider abstracting their usage into *utility.{c,h}pp
files with
wrapping existing Icinga types. That also allows later changes without
rewriting large code parts.
Note
A new Boost library should be explained in a PR and discussed with the team.
This requires package dependency changes.
If you consider an external library or code to be included with Icinga, the following requirements must be fulfilled:
- License is compatible with GPLv2+. Boost license, MIT works, Apache is not.
- C++17 is supported
- Header only implementations are preferred, external libraries require packages on every distribution.
- No additional frameworks, Boost is the only allowed.
- The code is proven to be robust and the GitHub repository is alive, or has 1k+ stars. Good libraries also provide a user list, if e.g. Ceph is using it, this is a good candidate.
Log ¶
Icinga allows the user to configure logging backends, e.g. syslog or file.
Any log message inside the code must use the Log()
function.
- The first parameter is the severity level, use them with care.
- The second parameter defines the location/scope where the log happened. Typically we use the class name here, to better analyse the logs the user provide in GitHub issues and on the community channels.
- The third parameter takes a log message string
If the message string needs to be computed from existing values, everything must be converted to the String type beforehand. This conversion for every value is very expensive which is why we try to avoid it.
Instead, use Log() with the shift operator where everything is written on the stream and conversions are explicitly done with templates in the background.
The trick here is that the Log object is destroyed immediately after being constructed once. The destructor actually evaluates the values and sends it to registers loggers.
Since flushing the stream every time a log entry occurs is very expensive, a timer takes care of flushing the stream every second.
Tip
If logging stopped, the flush timer thread may be dead. Inspect that with gdb/lldb.
Avoid log messages which could irritate the user. During
implementation, developers can change log levels to better
see what’s going one, but remember to change this back to debug
or remove it entirely.
Goto ¶
Avoid using goto
statements. There are rare occasions where
they are allowed:
- The code would become overly complicated within nested loops and conditions.
- Event processing and C interfaces.
- Question/Answer loops within interactive CLI commands.
Typedef and Auto Keywords ¶
Typedefs allow developers to use shorter names for specific types, classes and structs.
typedef std::map<String, std::shared_ptr<NamespaceValue> >::iterator Iterator;
These typedefs should be part of the Class definition in the header, or may be defined in the source scope where they are needed.
Avoid declaring global typedefs, unless necessary.
Using the auto
keyword allows to ignore a specific value type.
This comes in handy with maps/sets where no specific access
is required.
The following example iterates over a map returned from GetTypes()
.
for (const auto& kv : GetTypes()) {
result.insert(kv.second);
}
The long example would require us to define a map iterator, and a slightly different algorithm.
typedef std::map<String, DbType::Ptr> TypeMap;
typedef std::map<String, DbType::Ptr>::const_iterator TypeMapIterator;
TypeMap types = GetTypes();
for (TypeMapIterator it = types.begin(); it != types.end(); it++) {
result.insert(it.second);
}
We could also use a pair here, but requiring to know the specific types of the map keys and values.
typedef std::pair<String, DbType::Ptr> kv_pair;
for (const kv_pair& kv : GetTypes()) {
result.insert(kv.second);
}
After all, auto
shortens the code and one does not always need to know
about the specific types. Function documentation for GetTypes()
is
required though.
Whitespace Cleanup ¶
Patches must be cleaned up and follow the indent style (tabs instead of spaces). You should also remove any trailing whitespaces.
git diff
allows to highlight such.
vim $HOME/.gitconfig
[color "diff"]
whitespace = red reverse
[core]
whitespace=fix,-indent-with-non-tab,trailing-space,cr-at-eol
vim
also can match these and visually alert you to remove them.
vim $HOME/.vimrc
highlight ExtraWhitespace ctermbg=red guibg=red
match ExtraWhitespace /\s\+$/
autocmd BufWinEnter * match ExtraWhitespace /\s\+$/
autocmd InsertEnter * match ExtraWhitespace /\s\+\%#\@<!$/
autocmd InsertLeave * match ExtraWhitespace /\s\+$/
autocmd BufWinLeave * call clearmatches()
Development Environment ¶
Linux Dev Environment ¶
If you’re compiling Icinga 2 natively without any virtualization layer in between,
this usually is faster. This is also the reason why developers on macOS prefer native builds
over Linux or Windows VMs. Don’t forget to test the actual code on Linux later! Socket specific
stuff like epoll
is not available on Unix kernels.
Depending on your workstation and environment, you may either develop and run locally, use a container deployment pipeline or put everything in a high end resource remote VM.
Fork https://github.com/Icinga/icinga2 into your own repository, e.g. https://github.com/dnsmichi/icinga2
.
Create two build directories for different binary builds.
debug
contains the debug build binaries. They contain more debug information and run tremendously slower than release builds from packages. Don’t use them for benchmarks.release
contains the release build binaries, as you would install them on a live system. This helps comparing specific scenarios for race conditions and more.
mkdir -p release debug
Proceed with the specific distribution examples below. Keep in mind that these instructions are best effort and sometimes out-of-date. Git Master may contain updates.
Fedora 40 ¶
yum -y install gdb vim git bash-completion htop
yum -y install rpmdevtools ccache \
cmake make gcc-c++ flex bison \
openssl-devel boost-devel systemd-devel \
mysql-devel postgresql-devel libedit-devel \
libstdc++-devel
groupadd icinga
groupadd icingacmd
useradd -c "icinga" -s /sbin/nologin -G icingacmd -g icinga icinga
ln -s /bin/ccache /usr/local/bin/gcc
ln -s /bin/ccache /usr/local/bin/g++
git clone https://github.com/icinga/icinga2.git && cd icinga2
The debug build binaries contain specific code which runs slower but allows for better debugging insights.
For benchmarks, change CMAKE_BUILD_TYPE
to RelWithDebInfo
and
build inside the release
directory.
First, override the default prefix path.
export I2_GENERIC="-DCMAKE_INSTALL_PREFIX=/usr/local/icinga2"
Second, define the two build types with their specific CMake variables.
export I2_DEBUG="-DCMAKE_BUILD_TYPE=Debug -DICINGA2_UNITY_BUILD=OFF $I2_GENERIC"
export I2_RELEASE="-DCMAKE_BUILD_TYPE=RelWithDebInfo -DICINGA2_WITH_TESTS=ON -DICINGA2_UNITY_BUILD=ON $I2_GENERIC"
Third, depending on your likings, you may use a bash alias for building, or invoke the commands inside:
alias i2_debug="cd /root/icinga2; mkdir -p debug; cd debug; cmake $I2_DEBUG ..; make -j2; sudo make -j2 install; cd .."
alias i2_release="cd /root/icinga2; mkdir -p release; cd release; cmake $I2_RELEASE ..; make -j2; sudo make -j2 install; cd .."
i2_debug
The source installation doesn’t set proper permissions, this is handled in the package builds which are officially supported.
chown -R icinga:icinga /usr/local/icinga2/{etc,var}/
/usr/local/icinga2/lib/icinga2/prepare-dirs /usr/local/icinga2/etc/sysconfig/icinga2
/usr/local/icinga2/sbin/icinga2 api setup
vim /usr/local/icinga2/etc/icinga2/conf.d/api-users.conf
/usr/local/icinga2/lib64/icinga2/sbin/icinga2 daemon
Debian 10 ¶
Debian Buster doesn’t need updated Boost packages from packages.icinga.com, the distribution already provides 1.66+. For older versions such as Stretch, include the release repository for packages.icinga.com as shown in the setup instructions.
docker run -ti debian:buster bash
apt-get update
apt-get -y install apt-transport-https wget gnupg
apt-get -y install gdb vim git cmake make ccache build-essential libssl-dev bison flex default-libmysqlclient-dev libpq-dev libedit-dev monitoring-plugins
apt-get -y install libboost-all-dev
ln -s /usr/bin/ccache /usr/local/bin/gcc
ln -s /usr/bin/ccache /usr/local/bin/g++
groupadd icinga
groupadd icingacmd
useradd -c "icinga" -s /sbin/nologin -G icingacmd -g icinga icinga
git clone https://github.com/icinga/icinga2.git && cd icinga2
mkdir debug release
export I2_DEB="-DBoost_NO_BOOST_CMAKE=TRUE -DBoost_NO_SYSTEM_PATHS=TRUE -DBOOST_LIBRARYDIR=/usr/lib/x86_64-linux-gnu -DBOOST_INCLUDEDIR=/usr/include -DCMAKE_INSTALL_RPATH=/usr/lib/x86_64-linux-gnu"
export I2_GENERIC="-DCMAKE_INSTALL_PREFIX=/usr/local/icinga2 -DICINGA2_PLUGINDIR=/usr/local/sbin"
export I2_DEBUG="$I2_DEB $I2_GENERIC -DCMAKE_BUILD_TYPE=Debug -DICINGA2_UNITY_BUILD=OFF"
cd debug
cmake .. $I2_DEBUG
cd ..
make -j2 install -C debug
The source installation doesn’t set proper permissions, this is handled in the package builds which are officially supported.
chown -R icinga:icinga /usr/local/icinga2/{etc,var}/
/usr/local/icinga2/lib/icinga2/prepare-dirs /usr/local/icinga2/etc/sysconfig/icinga2
/usr/local/icinga2/sbin/icinga2 api setup
vim /usr/local/icinga2/etc/icinga2/conf.d/api-users.conf
/usr/local/icinga2/lib/icinga2/sbin/icinga2 daemon
Ubuntu 18 Bionic ¶
Requires Boost packages from packages.icinga.com.
docker run -ti ubuntu:bionic bash
apt-get update
apt-get -y install apt-transport-https wget gnupg
wget -O - https://packages.icinga.com/icinga.key | apt-key add -
. /etc/os-release; if [ ! -z ${UBUNTU_CODENAME+x} ]; then DIST="${UBUNTU_CODENAME}"; else DIST="$(lsb_release -c| awk '{print $2}')"; fi; \
echo "deb https://packages.icinga.com/ubuntu icinga-${DIST} main" > \
/etc/apt/sources.list.d/${DIST}-icinga.list
echo "deb-src https://packages.icinga.com/ubuntu icinga-${DIST} main" >> \
/etc/apt/sources.list.d/${DIST}-icinga.list
apt-get update
apt-get -y install gdb vim git cmake make ccache build-essential libssl-dev bison flex default-libmysqlclient-dev libpq-dev libedit-dev monitoring-plugins
apt-get install -y libboost1.67-icinga-all-dev
ln -s /usr/bin/ccache /usr/local/bin/gcc
ln -s /usr/bin/ccache /usr/local/bin/g++
groupadd icinga
groupadd icingacmd
useradd -c "icinga" -s /sbin/nologin -G icingacmd -g icinga icinga
git clone https://github.com/icinga/icinga2.git && cd icinga2
mkdir debug release
export I2_DEB="-DBoost_NO_BOOST_CMAKE=TRUE -DBoost_NO_SYSTEM_PATHS=TRUE -DBOOST_LIBRARYDIR=/usr/lib/x86_64-linux-gnu/icinga-boost -DBOOST_INCLUDEDIR=/usr/include/icinga-boost -DCMAKE_INSTALL_RPATH=/usr/lib/x86_64-linux-gnu/icinga-boost"
export I2_GENERIC="-DCMAKE_INSTALL_PREFIX=/usr/local/icinga2 -DICINGA2_PLUGINDIR=/usr/local/sbin"
export I2_DEBUG="$I2_DEB $I2_GENERIC -DCMAKE_BUILD_TYPE=Debug -DICINGA2_UNITY_BUILD=OFF"
cd debug
cmake .. $I2_DEBUG
cd ..
make -j2 install -C debug
The source installation doesn’t set proper permissions, this is handled in the package builds which are officially supported.
chown -R icinga:icinga /usr/local/icinga2/{etc,var}/
/usr/local/icinga2/lib/icinga2/prepare-dirs /usr/local/icinga2/etc/sysconfig/icinga2
/usr/local/icinga2/sbin/icinga2 api setup
vim /usr/local/icinga2/etc/icinga2/conf.d/api-users.conf
/usr/local/icinga2/lib/icinga2/sbin/icinga2 daemon
macOS Dev Environment ¶
It is advised to use Homebrew to install required build dependencies. Macports have been reported to work as well, typically you’ll get more help with Homebrew from Icinga developers.
The idea is to run Icinga with the current user, avoiding root permissions. This requires at least v2.11.
Note
This is a pure development setup for Icinga developers reducing the compile time in contrast to VMs. There are no packages, startup scripts or dependency management involved.
macOS agents are not officially supported.
macOS uses its own TLS implementation, Icinga relies on extra OpenSSL packages requiring updates apart from vendor security updates.
Requirements¶
Explicitly use OpenSSL 1.1.x, older versions are out of support.
brew install ccache boost cmake bison flex openssl@1.1 mysql-connector-c++ postgresql libpq
ccache¶
sudo mkdir /opt/ccache
sudo ln -s `which ccache` /opt/ccache/clang
sudo ln -s `which ccache` /opt/ccache/clang++
vim $HOME/.bash_profile
# ccache is managed with symlinks to avoid collision with cgo
export PATH="/opt/ccache:$PATH"
source $HOME/.bash_profile
Builds¶
Icinga is built as release (optimized build for packages) and debug (more symbols and details for debugging). Debug builds typically run slower than release builds and must not be used for performance benchmarks.
The preferred installation prefix is /usr/local/icinga/icinga2
. This allows to put e.g. Icinga Web 2 into the /usr/local/icinga
directory as well.
mkdir -p release debug
export I2_USER=$(id -u -n)
export I2_GROUP=$(id -g -n)
export I2_GENERIC="-DCMAKE_INSTALL_PREFIX=/usr/local/icinga/icinga2 -DICINGA2_USER=$I2_USER -DICINGA2_GROUP=$I2_GROUP -DOPENSSL_INCLUDE_DIR=/usr/local/opt/openssl@1.1/include -DOPENSSL_SSL_LIBRARY=/usr/local/opt/openssl@1.1/lib/libssl.dylib -DOPENSSL_CRYPTO_LIBRARY=/usr/local/opt/openssl@1.1/lib/libcrypto.dylib -DICINGA2_PLUGINDIR=/usr/local/sbin -DICINGA2_WITH_PGSQL=OFF -DCMAKE_EXPORT_COMPILE_COMMANDS=ON"
export I2_DEBUG="-DCMAKE_BUILD_TYPE=Debug -DICINGA2_UNITY_BUILD=OFF $I2_GENERIC"
export I2_RELEASE="-DCMAKE_BUILD_TYPE=RelWithDebInfo -DICINGA2_WITH_TESTS=ON -DICINGA2_UNITY_BUILD=ON $I2_GENERIC"
cd debug
cmake $I2_DEBUG ..
cd ..
make -j4 -C debug
make -j4 install -C debug
In order to run Icinga without any path prefix, and also use Bash completion it is advised to source additional things into the local dev environment.
export PATH=/usr/local/icinga/icinga2/sbin/:$PATH
test -f /usr/local/icinga/icinga2/etc/bash_completion.d/icinga2 && source /usr/local/icinga/icinga2/etc/bash_completion.d/icinga2
Build Aliases¶
This is derived from dnsmichi’s flavour and not generally best practice.
vim $HOME/.bash_profile
export I2_USER=$(id -u -n)
export I2_GROUP=$(id -g -n)
export I2_GENERIC="-DCMAKE_INSTALL_PREFIX=/usr/local/icinga/icinga2 -DICINGA2_USER=$I2_USER -DICINGA2_GROUP=$I2_GROUP -DOPENSSL_INCLUDE_DIR=/usr/local/opt/openssl@1.1/include -DOPENSSL_SSL_LIBRARY=/usr/local/opt/openssl@1.1/lib/libssl.dylib -DOPENSSL_CRYPTO_LIBRARY=/usr/local/opt/openssl@1.1/lib/libcrypto.dylib -DICINGA2_PLUGINDIR=/usr/local/sbin -DICINGA2_WITH_PGSQL=OFF -DCMAKE_EXPORT_COMPILE_COMMANDS=ON"
export I2_DEBUG="-DCMAKE_BUILD_TYPE=Debug -DICINGA2_UNITY_BUILD=OFF $I2_GENERIC"
export I2_RELEASE="-DCMAKE_BUILD_TYPE=RelWithDebInfo -DICINGA2_WITH_TESTS=ON -DICINGA2_UNITY_BUILD=ON $I2_GENERIC"
alias i2_debug="mkdir -p debug; cd debug; cmake $I2_DEBUG ..; make -j4; make -j4 install; cd .."
alias i2_release="mkdir -p release; cd release; cmake $I2_RELEASE ..; make -j4; make -j4 install; cd .."
export PATH=/usr/local/icinga/icinga2/sbin/:$PATH
test -f /usr/local/icinga/icinga2/etc/bash_completion.d/icinga2 && source /usr/local/icinga/icinga2/etc/bash_completion.d/icinga2
source $HOME/.bash_profile
Permissions¶
make install
doesn’t set all required permissions, override this.
chown -R $I2_USER:$I2_GROUP /usr/local/icinga/icinga2
Run¶
Start Icinga in foreground.
icinga2 daemon
Reloads triggered with HUP or cluster syncs just put the process into background.
Plugins¶
brew install monitoring-plugins
sudo vim /usr/local/icinga/icinga2/etc/icinga2/constants.conf
const PluginDir = "/usr/local/sbin"
Backends: Redis¶
brew install redis
brew services start redis
Databases: MariaDB¶
brew install mariadb
mkdir -p /usr/local/etc/my.cnf.d
brew services start mariadb
mysql_secure_installation
vim $HOME/.my.cnf
[client]
user = root
password = supersecurerootpassword
sudo -i
ln -s /Users/michi/.my.cnf $HOME/.my.cnf
exit
mysql -e 'create database icinga;'
mysql -e "grant all on icinga.* to 'icinga'@'localhost' identified by 'icinga';"
mysql icinga < $HOME/dev/icinga/icinga2/lib/db_ido_mysql/schema/mysql.sql
API¶
icinga2 api setup
cd /usr/local/icinga/icinga2/var/lib/icinga2/certs
HOST_NAME=mbpmif.int.netways.de
icinga2 pki new-cert --cn ${HOST_NAME} --csr ${HOST_NAME}.csr --key ${HOST_NAME}.key
icinga2 pki sign-csr --csr ${HOST_NAME}.csr --cert ${HOST_NAME}.crt
echo "const NodeName = \"${HOST_NAME}\"" >> /usr/local/icinga/icinga2/etc/icinga2/constants.conf
Web¶
While it is recommended to use Docker or the Icinga Web 2 development VM pointing to the shared IDO database resource/REST API, you can also install it locally on macOS.
The required steps are described in this script.
Windows Dev Environment ¶
The following sections explain how to setup the required build tools and how to run and debug the code.
TL;DR¶
If you’re going to setup a dev environment on a fresh Windows machine and don’t care for the details,
- ensure there are 35 GB free space on C:
- run the following in an administrative Powershell:
Enable-WindowsOptionalFeature -FeatureName "NetFx3" -Online
(reboot when asked!)powershell -NoProfile -ExecutionPolicy Bypass -Command "Invoke-Expression (New-Object Net.WebClient).DownloadString('https://raw.githubusercontent.com/Icinga/icinga2/master/doc/win-dev.ps1')"
(will take some time)
This installs everything needed for cloning and building Icinga 2 on the command line (Powershell) as follows:
(Don’t forget to open a new Powershell window to be able to use the newly installed Git.)
git clone https://github.com/Icinga/icinga2.git
cd .\icinga2\
mkdir build
cd .\build\
& "C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\Common7\IDE\CommonExtensions\Microsoft\CMake\CMake\bin\cmake.exe" `
-DICINGA2_UNITY_BUILD=OFF -DBoost_INCLUDE_DIR=C:\local\boost_1_85_0-Win64 `
-DBISON_EXECUTABLE=C:\ProgramData\chocolatey\lib\winflexbison3\tools\win_bison.exe `
-DFLEX_EXECUTABLE=C:\ProgramData\chocolatey\lib\winflexbison3\tools\win_flex.exe ..
& "C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\MSBuild\Current\Bin\MSBuild.exe" .\icinga2.sln
Building icinga2.sln via Visual Studio itself seems to require a reboot after installing the build tools.
Chocolatey¶
Open an administrative command prompt (Win key, type “cmd”, right-click and “run as administrator”) and paste the following instructions:
@powershell -NoProfile -ExecutionPolicy Bypass -Command "iex ((new-object net.webclient).DownloadString('https://chocolatey.org/install.ps1'))" && SET PATH=%PATH%;%ALLUSERSPROFILE%\chocolatey\bin
Git, Posh and Vim¶
In case you are used to vim
, start a new administrative Powershell:
choco install -y vim
The same applies for Git integration in Powershell:
choco install -y poshgit
In order to fix the colors for commands like git status
or git diff
,
edit $HOME/.gitconfig
in your Powershell and add the following lines:
vim $HOME/.gitconfig
[color "status"]
changed = cyan bold
untracked = yellow bold
added = green bold
branch = cyan bold
unmerged = red bold
[color "diff"]
frag = cyan
new = green bold
commit = yellow
old = red white
[color "branch"]
current = yellow reverse
local = yellow
remote = green bold
remote = red bold
Visual Studio¶
Thanks to Microsoft they’ll now provide their Professional Edition of Visual Studio as community version, free for use for open source projects such as Icinga. The installation requires ~9GB disk space. Download the web installer and start the installation.
Note: Only Visual Studio 2019 is covered here. Older versions are not supported.
You need a free Microsoft account to download and also store your preferences.
Install the following complete workloads:
- C++ Desktop Development
- .NET Desktop Development
In addition also choose these individual components on Visual Studio:
- .NET
- .NET Framework 4.x targeting packs
- .NET Framework 4.x.y SDKs
- Code tools
- Git for Windows
- GitHub Extension for Visual Studio
- NuGet package manager
- Compilers, build tools and runtimes
- C# and Visual Basic Roslyn compilers
- C++ 2019 Redistributable Update
- C++ CMake tools for Windows
- C++/CLI Support for v142 build tools (14.22)
- MSBuild
- MSVC v142 - VS 2019 C++ x64/x86 build tools (v14.22)
- Debugging and testing
- .NET profiling tools
- C++ profiling tools
- Just-in-Time debugger
- Development activities
- C# and Visual Basic
- C++ core features
- IntelliCode
- Live Share
- Games and Graphics
- Graphics debugger and GPU profiler for DirectX (required by C++ profiling tools)
- SDKs, libraries and frameworks
- Windows 10 SDK (10.0.18362.0 or later)
- Windows Universal C Runtime
After a while, Visual Studio will be ready.
Style Guide for Visual Studio¶
Navigate into Tools > Options > Text Editor
and repeat the following for
- C++
- C#
Navigate into Tabs
and set:
- Indenting: Smart (default)
- Tab size: 4
- Indent size: 4
- Keep tabs (instead of spaces)
Flex and Bison¶
Install it using chocolatey:
choco install -y winflexbison
Chocolatey installs these tools into the hidden directory C:\ProgramData\chocolatey\lib\winflexbison\tools
.
OpenSSL¶
Icinga 2 requires the OpenSSL library. Download the Win64 package
and install it into c:\local\OpenSSL-Win64
.
Once asked for Copy OpenSSLs DLLs to
select The Windows system directory
. That way CMake/Visual Studio
will automatically detect them for builds and packaging.
Note
We cannot use the chocolatey package as this one does not provide any development headers.
Choose 1.1.1 LTS from manual downloads for best compatibility.
Boost¶
Icinga needs the development header and library files from the Boost library.
Visual Studio translates into the following compiler versions:
msvc-14.2
= Visual Studio 2019
Pre-built Binaries¶
Prefer the pre-built package over self-compiling, if the newest version already exists.
Download the boost-binaries for
- msvc-14.2 is Visual Studio 2019
- 64 for 64 bit builds
https://sourceforge.net/projects/boost/files/boost-binaries/1.85.0/boost_1_85_0-msvc-14.2-64.exe/download
Run the installer and leave the default installation path in C:\local\boost_1_85_0
.
Source & Compile¶
In order to use the boost development header and library files you need to download
Boost and then extract it to e.g. C:\local\boost_1_85_0
.
Note
Just use
C:\local
, the zip file already contains the sub folder. Extraction takes a while, the archive contains more than 70k files.
In order to integrate Boost into Visual Studio, open the Developer Command Prompt
from the start menu,
and navigate to C:\local\boost_1_85_0
.
Execute bootstrap.bat
first.
cd C:\local\boost_1_85_0
bootstrap.bat
Once finished, specify the required toolset
to compile boost against Visual Studio.
This takes quite some time in a Windows VM. Boost Context uses Assembler code,
which isn’t treated as exception safe by the VS compiler. Therefore set the
additional compilation flag according to this entry.
b2 --toolset=msvc-14.2 link=static threading=multi runtime-link=static address-model=64 asmflags=\safeseh
TortoiseGit¶
TortoiseGit provides a graphical integration into the Windows explorer. This makes it easier to checkout, commit and whatnot.
Download TortoiseGit on your system.
In order to clone via Git SSH you also need to create a new directory called .ssh
inside your user’s home directory.
Therefore open a command prompt (win key, type cmd
, enter) and run mkdir .ssh
.
Add your id_rsa
private key and id_rsa.pub
public key files into that directory.
Start the setup routine and choose OpenSSH
as default secure transport when asked.
Open a Windows Explorer window and navigate into
cd %HOMEPATH%\source\repos
Right click and select Git Clone
from the context menu.
Use ssh://git@github.com/icinga/icinga2.git
for SSH clones, https://github.com/icinga/icinga2.git
otherwise.
Packages¶
CMake uses CPack and NSIS to create the setup executable including all binaries and libraries in addition to setup dialogues and configuration. Therefore we’ll need to install NSIS first.
We also need to install the Windows Installer XML (WIX) toolset. This has .NET 3.5 as a dependency which might need a reboot of the system which is not handled properly by Chocolatey. Therefore install it first and reboot when asked.
Enable-WindowsOptionalFeature -FeatureName "NetFx3" -Online
choco install -y wixtoolset
CMake¶
Icinga 2 uses CMake to manage the build environment. You can generate the Visual Studio project files using CMake. Download and install CMake. Select to add it to PATH for all users when asked.
Note
In order to properly detect the Boost libraries and VS 2019, install CMake 3.15.2+.
Tip
Cheatsheet: https://www.brianlheim.com/2018/04/09/cmake-cheat-sheet.html
Once setup is completed, open a command prompt and navigate to
cd %HOMEPATH%\source\repos
Build Icinga with specific CMake variables. This generates a new Visual Studio project file called icinga2.sln
.
Visual Studio translates into the following:
msvc-14.2
= Visual Studio 2019
You need to specify the previously installed component paths.
Variable | Value | Description |
---|---|---|
BOOST_ROOT |
C:\local\boost_1_85_0 |
Root path where you’ve extracted and compiled Boost. |
BOOST_LIBRARYDIR |
Binary: C:\local\boost_1_85_0\lib64-msvc-14.2 , Source: C:\local\boost_1_85_0\stage |
Path to the static compiled Boost libraries, directory must contain lib . |
BISON_EXECUTABLE |
C:\ProgramData\chocolatey\lib\winflexbison\tools\win_bison.exe |
Path to the Bison executable. |
FLEX_EXECUTABLE |
C:\ProgramData\chocolatey\lib\winflexbison\tools\win_flex.exe |
Path to the Flex executable. |
ICINGA2_UNITY_BUILD |
OFF | Disable unity builds for development environments. |
Tip: If you have previously opened a terminal, run refreshenv
to re-read updated PATH variables.
Build Scripts¶
Icinga provides the build scripts inside the Git repository.
Open a new Powershell and navigate into the cloned Git repository. Set specific environment variables and run the build scripts.
cd %HOMEPATH%\source\repos\icinga2
.\tools\win32\configure-dev.ps1
.\tools\win32\build.ps1
.\tools\win32\test.ps1
The debug MSI package is located in the debug
directory.
If you did not follow the above steps with Boost binaries and OpenSSL paths, you can still modify the environment variables.
$env:CMAKE_GENERATOR='Visual Studio 16 2019'
$env:CMAKE_GENERATOR_PLATFORM='x64'
$env:ICINGA2_INSTALLPATH = 'C:\Program Files\Icinga2-debug'
$env:ICINGA2_BUILDPATH='debug'
$env:CMAKE_BUILD_TYPE='Debug'
$env:OPENSSL_ROOT_DIR='C:\OpenSSL-Win64'
$env:BOOST_ROOT='C:\local\boost_1_85_0'
$env:BOOST_LIBRARYDIR='C:\local\boost_1_85_0\lib64-msvc-14.2'
Icinga 2 in Visual Studio¶
This requires running the configure script once.
Navigate to
cd %HOMEPATH%\source\repos\icinga2\debug
Open icinga2.sln
. Log into Visual Studio when asked.
On the right panel, select to build the Bin/icinga-app
solution.
The executable binaries are located in Bin\Release\Debug
in your icinga2
project directory.
Navigate there and run icinga2.exe --version
.
cd %HOMEPATH%\source\repos\icinga2\Bin\Release\Debug
icinga2.exe --version
Release Package¶
This is part of the build process script. Override the build type and pick a different build directory.
cd %HOMEPATH%\source\repos\icinga2
$env:ICINGA2_BUILDPATH='release'
$env:CMAKE_BUILD_TYPE='RelWithDebInfo'
.\tools\win32\configure-dev.ps1
.\tools\win32\build.ps1
.\tools\win32\test.ps1
The release MSI package is located in the release
directory.
Embedded Dev Env: Pi ¶
Note
This isn’t officially supported yet, just a few hints how you can do it yourself.
The following examples source from armhf on Raspberry Pi.
ccache¶
apt install -y ccache
/usr/sbin/update-ccache-symlinks
echo 'export PATH="/usr/lib/ccache:$PATH"' | tee -a ~/.bashrc
source ~/.bashrc && echo $PATH
Build¶
Copy the icinga2 source code into $HOME/icinga2
. Clone the deb-icinga2
repository into debian/
.
git clone https://github.com/Icinga/icinga2 $HOME/icinga2
git clone https://github.com/Icinga/deb-icinga2 $HOME/icinga2/debian
Then build a Debian package and install it like normal.
dpkg-buildpackage -uc -us
Package Builds ¶
This documentation is explicitly meant for packagers and the Icinga build infrastructure.
The following requirements need to be fulfilled in order to build the Icinga application using a dist tarball (including notes for distributions):
- cmake >= 2.6
- GNU make (make) or ninja-build
- C++ compiler which supports C++17
- RHEL/Fedora/SUSE: gcc-c++ >= 7 (extra Developer Tools on RHEL7 see below)
- Debian/Ubuntu: build-essential
- Alpine: build-base
- you can also use clang++
- pkg-config
- OpenSSL library and header files >= 1.0.1
- RHEL/Fedora: openssl-devel
- SUSE: libopenssl-devel
- Debian/Ubuntu: libssl-dev
- Alpine: libressl-dev
- Boost library and header files >= 1.66.0
- RHEL/Fedora: boost166-devel
- Debian/Ubuntu: libboost-all-dev
- Alpine: boost-dev
- GNU bison (bison)
- GNU flex (flex) >= 2.5.35
- systemd headers
- Only required when using systemd
- Debian/Ubuntu: libsystemd-dev
- RHEL/Fedora: systemd-devel
Optional features ¶
- MySQL (disable with CMake variable
ICINGA2_WITH_MYSQL
toOFF
)- RHEL/Fedora: mysql-devel
- SUSE: libmysqlclient-devel
- Debian/Ubuntu: default-libmysqlclient-dev | libmysqlclient-dev
- Alpine: mariadb-dev
- PostgreSQL (disable with CMake variable
ICINGA2_WITH_PGSQL
toOFF
)- RHEL/Fedora: postgresql-devel
- Debian/Ubuntu: libpq-dev
- postgresql-dev on Alpine
- libedit (CLI console)
- RHEL/Fedora: libedit-devel (RHEL requires rhel-7-server-optional-rpms)
- Debian/Ubuntu/Alpine: libedit-dev
- Termcap (only required if libedit doesn’t already link against termcap/ncurses)
- RHEL/Fedora: libtermcap-devel
- Debian/Ubuntu: (not necessary)
Special requirements ¶
FreeBSD: libexecinfo (automatically used when Icinga 2 is installed via port or package)
RHEL6: Requires a newer boost version which is available on packages.icinga.com with a version suffixed name.
Runtime user environment ¶
By default Icinga will run as user icinga
and group icinga
. Additionally the
external command pipe and livestatus features require a dedicated command group
icingacmd
. You can choose your own user/group names and pass them to CMake
using the ICINGA2_USER
, ICINGA2_GROUP
and ICINGA2_COMMAND_GROUP
variables.
groupadd icinga
groupadd icingacmd
useradd -c "icinga" -s /sbin/nologin -G icingacmd -g icinga icinga
On Alpine (which uses ash busybox) you can run:
addgroup -S icinga
addgroup -S icingacmd
adduser -S -D -H -h /var/spool/icinga2 -s /sbin/nologin -G icinga -g icinga icinga
adduser icinga icingacmd
Add the web server user to the icingacmd group in order to grant it write permissions to the external command pipe and livestatus socket:
usermod -a -G icingacmd www-data
Make sure to replace “www-data” with the name of the user your web server is running as.
Building Icinga 2: Example ¶
Once you have installed all the necessary build requirements you can build Icinga 2 using the following commands:
mkdir release && cd release
cmake ..
cd ..
make -C release
make install -C release
You can specify an alternative installation prefix using -DCMAKE_INSTALL_PREFIX
:
cmake .. -DCMAKE_INSTALL_PREFIX=/tmp/icinga2
CMake Variables ¶
In addition to CMAKE_INSTALL_PREFIX
here are most of the supported Icinga-specific cmake variables.
For all variables regarding defaults paths on in CMake, see GNUInstallDirs.
Also see CMakeLists.txt
for details.
System Environment¶
CMAKE_INSTALL_SYSCONFDIR
: The configuration directory; defaults toCMAKE_INSTALL_PREFIX/etc
CMAKE_INSTALL_LOCALSTATEDIR
: The state directory; defaults toCMAKE_INSTALL_PREFIX/var
ICINGA2_CONFIGDIR
: Main config directory; defaults toCMAKE_INSTALL_SYSCONFDIR/icinga2
usually/etc/icinga2
ICINGA2_CACHEDIR
: Directory for cache files; defaults toCMAKE_INSTALL_LOCALSTATEDIR/cache/icinga2
usually/var/cache/icinga2
ICINGA2_DATADIR
: Data directory for the daemon; defaults toCMAKE_INSTALL_LOCALSTATEDIR/lib/icinga2
usually/var/lib/icinga2
ICINGA2_LOGDIR
: Logfiles of the daemon; defaults toCMAKE_INSTALL_LOCALSTATEDIR/log/icinga2 usually
/var/log/icinga2`ICINGA2_SPOOLDIR
: Spooling directory ; defaults toCMAKE_INSTALL_LOCALSTATEDIR/spool/icinga2
usually/var/spool/icinga2
ICINGA2_INITRUNDIR
: Runtime data for the init system; defaults toCMAKE_INSTALL_LOCALSTATEDIR/run/icinga2
usually/run/icinga2
ICINGA2_GIT_VERSION_INFO
: Whether to use Git to determine the version number; defaults toON
ICINGA2_USER
: The user Icinga 2 should run as; defaults toicinga
ICINGA2_GROUP
: The group Icinga 2 should run as; defaults toicinga
ICINGA2_COMMAND_GROUP
: The command group Icinga 2 should use; defaults toicingacmd
ICINGA2_SYSCONFIGFILE
: Where to put the config file the initscript/systemd pulls it’s dirs from;- defaults to
CMAKE_INSTALL_PREFIX/etc/sysconfig/icinga2
ICINGA2_PLUGINDIR
: The path for the Monitoring Plugins project binaries; defaults to/usr/lib/nagios/plugins
Build Optimization¶
ICINGA2_UNITY_BUILD
: Whether to perform a unity build; defaults toON
. Note: This requires additional memory and is not advised for building VMs, Docker for Mac and embedded hardware.ICINGA2_LTO_BUILD
: Whether to use link time optimization (LTO); defaults toOFF
Init System¶
USE_SYSTEMD=ON|OFF
: Use systemd or a classic SysV initscript; defaults toOFF
INSTALL_SYSTEMD_SERVICE_AND_INITSCRIPT=ON|OFF
Force install both the systemd service definition file and the SysV initscript in parallel, regardless of howUSE_SYSTEMD
is set. Only use this for special packaging purposes and if you know what you are doing. Defaults toOFF
.
Features¶
ICINGA2_WITH_CHECKER
: Determines whether the checker module is built; defaults toON
ICINGA2_WITH_COMPAT
: Determines whether the compat module is built; defaults toON
ICINGA2_WITH_LIVESTATUS
: Determines whether the Livestatus module is built; defaults toON
ICINGA2_WITH_NOTIFICATION
: Determines whether the notification module is built; defaults toON
ICINGA2_WITH_PERFDATA
: Determines whether the perfdata module is built; defaults toON
ICINGA2_WITH_TESTS
: Determines whether the unit tests are built; defaults toON
MySQL or MariaDB¶
The following settings can be tuned for the MySQL / MariaDB IDO feature.
ICINGA2_WITH_MYSQL
: Determines whether the MySQL IDO module is built; defaults toON
MYSQL_CLIENT_LIBS
: Client implementation used (mysqlclient / mariadbclient); defaults searches formysqlclient
andmariadbclient
MYSQL_INCLUDE_DIR
: Directory containing include files for the mysqlclient; default empty - checking multiple paths like/usr/include/mysql
See FindMySQL.cmake for implementation details.
PostgreSQL¶
The following settings can be tuned for the PostgreSQL IDO feature.
ICINGA2_WITH_PGSQL
: Determines whether the PostgreSQL IDO module is built; defaults toON
PostgreSQL_INCLUDE_DIR
: Top-level directory containing the PostgreSQL include directoriesPostgreSQL_LIBRARY
: File path to PostgreSQL library : libpq.so (or libpq.so.[ver] file)
See FindPostgreSQL.cmake for implementation details.
Version detection¶
CMake determines the Icinga 2 version number using git describe
if the
source directory is contained in a Git repository. Otherwise the version number
is extracted from the ICINGA2_VERSION file. This behavior can be
overridden by creating a file called icinga-version.h.force
in the source
directory. Alternatively the -DICINGA2_GIT_VERSION_INFO=OFF
option for CMake
can be used to disable the usage of git describe
.
Building RPMs ¶
Build Environment on RHEL, Fedora, Amazon Linux¶
Setup your build environment:
yum -y install rpmdevtools
Build Environment on SuSE/SLES¶
SLES:
zypper addrepo http://download.opensuse.org/repositories/devel:tools/SLE_12_SP4/devel:tools.repo
zypper refresh
zypper install rpmdevtools spectool
OpenSuSE:
zypper addrepo http://download.opensuse.org/repositories/devel:tools/openSUSE_Leap_15.0/devel:tools.repo
zypper refresh
zypper install rpmdevtools spectool
Package Builds ¶
Prepare the rpmbuild directory tree:
cd $HOME
rpmdev-setuptree
Snapshot builds:
curl https://raw.githubusercontent.com/Icinga/rpm-icinga2/master/icinga2.spec -o $HOME/rpmbuild/SPECS/icinga2.spec
Note
The above command builds snapshot packages. Change to the
release
branch for release package builds.
Copy the tarball to rpmbuild/SOURCES
e.g. by using the spectool
binary
provided with rpmdevtools
:
cd $HOME/rpmbuild/SOURCES
spectool -g ../SPECS/icinga2.spec
cd $HOME/rpmbuild
Install the build dependencies:
yum -y install libedit-devel ncurses-devel gcc-c++ libstdc++-devel openssl-devel \
cmake flex bison boost-devel systemd mysql-devel postgresql-devel httpd \
selinux-policy-devel checkpolicy selinux-policy selinux-policy-doc
Note: If you are using Amazon Linux, systemd is not required.
A shorter way is available using the yum-builddep
command on RHEL based systems:
yum-builddep SPECS/icinga2.spec
Build the RPM:
rpmbuild -ba SPECS/icinga2.spec
Additional Hints ¶
SELinux policy module¶
The following packages are required to build the SELinux policy module:
- checkpolicy
- selinux-policy-devel
- selinux-policy-doc
Amazon Linux¶
If you prefer to build packages offline, a suitable Vagrant box is located here.
Build Debian/Ubuntu packages ¶
Setup your build environment on Debian/Ubuntu, copy the ‘debian’ directory from the Debian packaging Git repository (https://github.com/Icinga/deb-icinga2) into your source tree and run the following command:
dpkg-buildpackage -uc -us
Build Alpine Linux packages ¶
A simple way to setup a build environment is installing Alpine in a chroot. In this way, you can set up an Alpine build environment in a chroot under a different Linux distro. There is a script that simplifies these steps with just two commands, and can be found here.
Once the build environment is installed, you can setup the system to build the packages by following this document.
Build Post Install Tasks ¶
After building Icinga 2 yourself, your package build system should at least run the following post install requirements:
- enable the
checker
,notification
andmainlog
feature by default - run ‘icinga2 api setup’ in order to enable the
api
feature and generate TLS certificates for the node
Run Icinga 2 ¶
Icinga 2 comes with a binary that takes care of loading all the relevant components (e.g. for check execution, notifications, etc.):
icinga2 daemon
[2016-12-08 16:44:24 +0100] information/cli: Icinga application loader (version: v2.5.4-231-gb10a6b7; debug)
[2016-12-08 16:44:24 +0100] information/cli: Loading configuration file(s).
[2016-12-08 16:44:25 +0100] information/ConfigItem: Committing config item(s).
...
Init Script ¶
Icinga 2 can be started as a daemon using the provided init script:
/etc/init.d/icinga2
Usage: /etc/init.d/icinga2 {start|stop|restart|reload|checkconfig|status}
Systemd ¶
If your distribution uses systemd:
systemctl {start|stop|reload|status|enable|disable} icinga2
In case the distribution is running systemd >227, you’ll also
need to package and install the etc/initsystem/icinga2.service.limits.conf
file into /etc/systemd/system/icinga2.service.d
.
openrc ¶
Or if your distribution uses openrc (like Alpine):
rc-service icinga2
Usage: /etc/init.d/icinga2 {start|stop|restart|reload|checkconfig|status}
Note: the openrc’s init.d is not shipped by default. A working init.d with openrc can be found here: (https://git.alpinelinux.org/cgit/aports/plain/community/icinga2/icinga2.initd). If you have customized some path, edit the file and adjust it according with your setup. Those few steps can be followed:
wget https://git.alpinelinux.org/cgit/aports/plain/community/icinga2/icinga2.initd
mv icinga2.initd /etc/init.d/icinga2
chmod +x /etc/init.d/icinga2
Icinga 2 reads a single configuration file which is used to specify all configuration settings (global settings, hosts, services, etc.). The configuration format is explained in detail in the doc/ directory.
By default make install
installs example configuration files in
/usr/local/etc/icinga2
unless you have specified a different prefix or
sysconfdir.
Windows Builds ¶
The Windows MSI packages are located at https://packages.icinga.com/windows/
The build infrastructure is based on GitLab CI and an Ansible provisioned Windows VM running in OpenStack.
The runner uses the scripts located in tools/win32
to configure, build
and test the packages. Uploading them to the package repository is a
separate step. For manual package creation, please refer to this chapter.
Continuous Integration ¶
Icinga uses the integrated CI capabilities on GitHub in the development workflow. This ensures that incoming pull requests and branches are built on create/push events. Contributors and developers can immediately see whether builds fail or succeed and help the final reviews.
- For Linux, we are currently using Travis CI.
- For Windows, AppVeyor has been integrated.
Future plans involve making use of GitHub Actions.
In addition to our development platform on GitHub, we are using GitLab’s CI platform to build binary packages for all supported operating systems and distributions. These CI pipelines provide even more detailed insights into specific platform failures and developers can react faster.
CI: Travis CI¶
Travis CI provides Ubuntu as base distribution where Icinga is compiled from sources followed by running the unit tests and a config validation check.
For details, please refer to the .travis.yml configuration file.
CI: AppVeyor¶
AppVeyor provides Windows as platform where Visual Studio and Boost libraries come pre-installed.
Icinga is built using the Powershell scripts located in tools/win32
.
In addition to that, the unit tests are run.
Please check the appveyor.yml configuration file for details.
Advanced Development Tips ¶
GDB Pretty Printers ¶
Install the boost
, python
and icinga2
pretty printers. Absolute paths are required,
so please make sure to update the installation paths accordingly (pwd
).
mkdir -p ~/.gdb_printers && cd ~/.gdb_printers
Boost Pretty Printers compatible with Python 3:
$ git clone https://github.com/mateidavid/Boost-Pretty-Printer.git && cd Boost-Pretty-Printer
$ git checkout python-3
$ pwd
/home/michi/.gdb_printers/Boost-Pretty-Printer
Python Pretty Printers:
cd ~/.gdb_printers
svn co svn://gcc.gnu.org/svn/gcc/trunk/libstdc++-v3/python
Icinga 2 Pretty Printers:
mkdir -p ~/.gdb_printers/icinga2 && cd ~/.gdb_printers/icinga2
wget https://raw.githubusercontent.com/Icinga/icinga2/master/tools/debug/gdb/icingadbg.py
Now you’ll need to modify/setup your ~/.gdbinit
configuration file.
You can download the one from Icinga 2 and modify all paths.
Example on Fedora 22:
$ wget https://raw.githubusercontent.com/Icinga/icinga2/master/tools/debug/gdb/gdbinit -O ~/.gdbinit
$ vim ~/.gdbinit
set print pretty on
python
import sys
sys.path.insert(0, '/home/michi/.gdb_printers/icinga2')
from icingadbg import register_icinga_printers
register_icinga_printers()
end
python
import sys
sys.path.insert(0, '/home/michi/.gdb_printers/python')
from libstdcxx.v6.printers import register_libstdcxx_printers
try:
register_libstdcxx_printers(None)
except:
pass
end
python
import sys
sys.path.insert(0, '/home/michi/.gdb_printers/Boost-Pretty-Printer')
import boost_print
boost_print.register_printers()
end
If you are getting the following error when running gdb, the libstdcxx
printers are already preloaded in your environment and you can remove
the duplicate import in your ~/.gdbinit
file.
RuntimeError: pretty-printer already registered: libstdc++-v6