mirror of
https://github.com/xemu-project/xemu.git
synced 2024-11-26 21:10:42 +00:00
118 lines
4.3 KiB
HTML
118 lines
4.3 KiB
HTML
Jobs on Custom Runners
|
|
======================
|
|
|
|
Besides the jobs run under the various CI systems listed before, there
|
|
are a number additional jobs that will run before an actual merge.
|
|
These use the same GitLab CI's service/framework already used for all
|
|
other GitLab based CI jobs, but rely on additional systems, not the
|
|
ones provided by GitLab as "shared runners".
|
|
|
|
The architecture of GitLab's CI service allows different machines to
|
|
be set up with GitLab's "agent", called gitlab-runner, which will take
|
|
care of running jobs created by events such as a push to a branch.
|
|
Here, the combination of a machine, properly configured with GitLab's
|
|
gitlab-runner, is called a "custom runner".
|
|
|
|
The GitLab CI jobs definition for the custom runners are located under::
|
|
|
|
.gitlab-ci.d/custom-runners.yml
|
|
|
|
Custom runners entail custom machines. To see a list of the machines
|
|
currently deployed in the QEMU GitLab CI and their maintainers, please
|
|
refer to the QEMU `wiki <https://wiki.qemu.org/AdminContacts>`__.
|
|
|
|
Machine Setup Howto
|
|
-------------------
|
|
|
|
For all Linux based systems, the setup can be mostly automated by the
|
|
execution of two Ansible playbooks. Create an ``inventory`` file
|
|
under ``scripts/ci/setup``, such as this::
|
|
|
|
fully.qualified.domain
|
|
other.machine.hostname
|
|
|
|
You may need to set some variables in the inventory file itself. One
|
|
very common need is to tell Ansible to use a Python 3 interpreter on
|
|
those hosts. This would look like::
|
|
|
|
fully.qualified.domain ansible_python_interpreter=/usr/bin/python3
|
|
other.machine.hostname ansible_python_interpreter=/usr/bin/python3
|
|
|
|
Build environment
|
|
~~~~~~~~~~~~~~~~~
|
|
|
|
The ``scripts/ci/setup/build-environment.yml`` Ansible playbook will
|
|
set up machines with the environment needed to perform builds and run
|
|
QEMU tests. This playbook consists on the installation of various
|
|
required packages (and a general package update while at it). It
|
|
currently covers a number of different Linux distributions, but it can
|
|
be expanded to cover other systems.
|
|
|
|
The minimum required version of Ansible successfully tested in this
|
|
playbook is 2.8.0 (a version check is embedded within the playbook
|
|
itself). To run the playbook, execute::
|
|
|
|
cd scripts/ci/setup
|
|
ansible-playbook -i inventory build-environment.yml
|
|
|
|
Please note that most of the tasks in the playbook require superuser
|
|
privileges, such as those from the ``root`` account or those obtained
|
|
by ``sudo``. If necessary, please refer to ``ansible-playbook``
|
|
options such as ``--become``, ``--become-method``, ``--become-user``
|
|
and ``--ask-become-pass``.
|
|
|
|
gitlab-runner setup and registration
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
The gitlab-runner agent needs to be installed on each machine that
|
|
will run jobs. The association between a machine and a GitLab project
|
|
happens with a registration token. To find the registration token for
|
|
your repository/project, navigate on GitLab's web UI to:
|
|
|
|
* Settings (the gears-like icon at the bottom of the left hand side
|
|
vertical toolbar), then
|
|
* CI/CD, then
|
|
* Runners, and click on the "Expand" button, then
|
|
* Under "Set up a specific Runner manually", look for the value under
|
|
"And this registration token:"
|
|
|
|
Copy the ``scripts/ci/setup/vars.yml.template`` file to
|
|
``scripts/ci/setup/vars.yml``. Then, set the
|
|
``gitlab_runner_registration_token`` variable to the value obtained
|
|
earlier.
|
|
|
|
To run the playbook, execute::
|
|
|
|
cd scripts/ci/setup
|
|
ansible-playbook -i inventory gitlab-runner.yml
|
|
|
|
Following the registration, it's necessary to configure the runner tags,
|
|
and optionally other configurations on the GitLab UI. Navigate to:
|
|
|
|
* Settings (the gears like icon), then
|
|
* CI/CD, then
|
|
* Runners, and click on the "Expand" button, then
|
|
* "Runners activated for this project", then
|
|
* Click on the "Edit" icon (next to the "Lock" Icon)
|
|
|
|
Tags are very important as they are used to route specific jobs to
|
|
specific types of runners, so it's a good idea to double check that
|
|
the automatically created tags are consistent with the OS and
|
|
architecture. For instance, an Ubuntu 20.04 aarch64 system should
|
|
have tags set as::
|
|
|
|
ubuntu_20.04,aarch64
|
|
|
|
Because the job definition at ``.gitlab-ci.d/custom-runners.yml``
|
|
would contain::
|
|
|
|
ubuntu-20.04-aarch64-all:
|
|
tags:
|
|
- ubuntu_20.04
|
|
- aarch64
|
|
|
|
It's also recommended to:
|
|
|
|
* increase the "Maximum job timeout" to something like ``2h``
|
|
* give it a better Description
|