microsoft / Build-OMS-Agent-for-Linux

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[DEPRECATED] Operations Management Suite Linux Agent

:warning: The Log Analytics agent has been deprecated and has no support as of August 31, 2024. If you use the Log Analytics agent to ingest data to Azure Monitor, migrate now to the new Azure Monitor agent.

Table of Contents

If you are an active contributor to the OMS-Agent project, you should set up your system and follow our common workflow. New to git? Read guidelines for development.


Setting up a machine to build OMS

A "shell bundle" is a distribution mechanism for the OMS agent. A shell bundle is a shell script that has, as part of it, .RPM and .DEB native package files. The shell bundle determines what has to be installed based on system configuration and installs the appropriate packages.

There are two ways to build OMS.

  1. As an RPM or DEB package that can be installed on the local system, assuming all dependencies are met (most easily met if a shell bundle was previously installed to "seed" the system), or

  2. As a shell bundle.

Building a shell bundle is a superset of setting up a system to build a local RPM, so we will cover that first.

Sudoers configuration

Configure sudo

Dependencies to build a native package

Note that it's very nice to be able to use the updatedns project to use host names rather than IP numbers in a Hyper-V environment. On CentOS systems, this requires the bind-utils package (updatedns requires the 'dig' program). The bind-utils package isn't otherwise necessary.

Libboost is not a runtime dependency. It is only needed to build and run the OMS-Auditd-Plugin unittests.

Setting up a system to build a shell bundle

To build a shell bundle, we need and older Linux system (we typically use CentOS 5.0 for this), as binary images created with older Linux systems are generally upwards compatible when installed on newer Linux systems.

A notable exception: We use the OpenSSL package, and we can't tell if we need OpenSSL v1.0.x or OpenSSL v1.1.x. As a result, we have a special process to build both versions of OpenSSL that we can link against.

Once OpenSSL is set up, you need to configure omsagent to include the --enable-ulinux qualifier, like this:
./configure --enable-ulinux

Cloning the repositories

If you have read access to the OMS TestConfig project, use the following.

Otherwise, only run the first git clone command and refer to preparing system tests if you want them to be run.

git clone --recursive git@github.com:Microsoft/Build-OMS-Agent-for-Linux.git bld-omsagent
git clone git@github.com:Microsoft/OMS-Agent-for-Linux-testconfig.git bld-omsagent/omsagent/test/config

Note that there are several subprojects, and authentication is a hassle unless you set up an SSH key via your GitHub account. Set up your machine properly for a much easier workflow.

Preparing system tests

This section only applies if you do not have read access to OMS TestConfig project

System tests communicate with the server. They require keys which may not be published. You may obtain your own keys for free by creating an account on Microsoft Operations Management Suite then get the keys from the settings view.

Create the file bld-omsagent/omsagent/test/config/systest.conf with content like so:

export TEST_WORKSPACE_ID=<id>
export TEST_SHARED_KEY=<key>

export TEST_WORKSPACE_ID_2=<id>
export TEST_SHARED_KEY_2=<key>

export TEST_PROXY_SETTING="http://proxyuser:proxypass@host:8080"

Building omsagent

From the bld-omsagent directory (created above from 'git clone', do the following:

cd omsagent/build
./configure
make
make test

Note that the configure script takes a variety of options. You can use configure --help to see the options available.

When the build completes, you should have a native package that you can install on your system. The native package should be in a subdirectory off of bld-omsagent/omsagent/target (the directory name varies based on debug vs. release builds).

As mentioned above, this form of build requires a shell bundle to be installed to "seed" your system with other required dependencies.

Note that the build will build multiple versions of Ruby (one for unit test, only built once, even after "make distclean"), and then one or two versions depending if you're building for a shell bundle or not. Bottom line: The first build is always slower than subsequent builds.

Troubleshooting

Improper clone of project

If you get an error during the Ruby build like:

downloader.rb:180: private method `class_variable_set' called for Downloader:Class (NoMethodError)
configure: error: cannot run /bin/sh tool/config.sub
make: *** [/usr/local/ruby-2.2.0a] Error 127

While this points to an issue where your system version of Ruby is too old (strangely enough, Ruby is required to build Ruby), the root source of the issue is that you didn't clone the repository recursively. Please read the section on cloning the repositories for details on how to clone the repository.

Code of Conduct

This project has adopted the Microsoft Open Source Code of Conduct. For more information see the Code of Conduct FAQ or contact opencode@microsoft.com with any additional questions or comments.