Re: [PATCH v6 2/4] Jobs based on custom runners: build environment docs and playbook

[Alex Bennée]

Cleber Rosa <crosa@redhat.com> writes:

> To run basic jobs on custom runners, the environment needs to be
> properly set up.  The most common requirement is having the right
> packages installed.
>
> The playbook introduced here covers the QEMU's project s390x and
> aarch64 machines.  At the time this is being proposed, those machines
> have already had this playbook applied to them.
>
> Signed-off-by: Cleber Rosa <crosa@redhat.com>
> ---
>  docs/devel/ci.rst                      | 30 ++++++++
>  scripts/ci/setup/build-environment.yml | 98 ++++++++++++++++++++++++++
>  scripts/ci/setup/inventory.template    |  1 +
>  3 files changed, 129 insertions(+)
>  create mode 100644 scripts/ci/setup/build-environment.yml
>  create mode 100644 scripts/ci/setup/inventory.template
>
> diff --git a/docs/devel/ci.rst b/docs/devel/ci.rst
> index 585b7bf4b8..35c6b5e269 100644
> --- a/docs/devel/ci.rst
> +++ b/docs/devel/ci.rst
> @@ -26,3 +26,33 @@ 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
> +
> +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.  It covers a number of different Linux distributions and
> +FreeBSD.
> +
> +To run the playbook, execute::
> +
> +  cd scripts/ci/setup
> +  ansible-playbook -i inventory build-environment.yml

I tried this to re-update aarch64.ci.qemu.org and another ubuntu box I
have up and running as a VM and I got a failure when checking facts:

  14:26:26 [alex@zen:~/l/q/s/c/setup] review/custom-runners-v6|✚1…(+1/-1) + 
ansible-playbook -i inventory build-environment.yml

  PLAY [Installation of basic packages to build QEMU] 
*************************************************************************************************************************

  TASK [Gathering Facts] 
******************************************************************************************************************************************************
  ok: [aarch64.ci.qemu.org]
  ok: [hackbox-ubuntu-2004]

  TASK [Update apt cache] 
*****************************************************************************************************************************************************
  fatal: [aarch64.ci.qemu.org]: FAILED! => {"msg": "The conditional check 
'ansible_facts['distribution'] == 'Ubuntu'' failed. The error was: error while 
evaluating conditional (ansible_facts['distribution'] == 'Ubuntu'): 'dict 
object' has no attribute 'distribution'\n\nThe error appears to have been in 
'/home/alex/lsrc/qemu.git/scripts/ci/setup/build-environment.yml': line 5, 
column 7, but may\nbe elsewhere in the file depending on the exact syntax 
problem.\n\nThe offending line appears to be:\n\n  tasks:\n    - name: Update 
apt cache\n      ^ here\n"}
  fatal: [hackbox-ubuntu-2004]: FAILED! => {"msg": "The conditional check 
'ansible_facts['distribution'] == 'Ubuntu'' failed. The error was: error while 
evaluating conditional (ansible_facts['distribution'] == 'Ubuntu'): 'dict 
object' has no attribute 'distribution'\n\nThe error appears to have been in 
'/home/alex/lsrc/qemu.git/scripts/ci/setup/build-environment.yml': line 5, 
column 7, but may\nbe elsewhere in the file depending on the exact syntax 
problem.\n\nThe offending line appears to be:\n\n  tasks:\n    - name: Update 
apt cache\n      ^ here\n"}
          to retry, use: --limit 
@/home/alex/lsrc/qemu.git/scripts/ci/setup/build-environment.retry

  PLAY RECAP 
******************************************************************************************************************************************************************
  aarch64.ci.qemu.org        : ok=1    changed=0    unreachable=0    failed=1
  hackbox-ubuntu-2004        : ok=1    changed=0    unreachable=0    failed=1


-- 
Alex Bennée