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

[Cleber Rosa <crosa@redhat.com>]

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
diff --git a/scripts/ci/setup/build-environment.yml b/scripts/ci/setup/build-environment.yml
new file mode 100644
index 0000000000..664f2f0519
--- /dev/null
+++ b/scripts/ci/setup/build-environment.yml
@@ -0,0 +1,98 @@
+---
+- name: Installation of basic packages to build QEMU
+  hosts: all
+  tasks:
+    - name: Update apt cache
+      apt:
+        update_cache: yes
+      when:
+        - ansible_facts['distribution'] == 'Ubuntu'
+
+    - name: Install basic packages to build QEMU on Ubuntu 18.04/20.04
+      package:
+        name:
+        # Originally from tests/docker/dockerfiles/ubuntu1804.docker
+          - ccache
+          - gcc
+          - gettext
+          - git
+          - glusterfs-common
+          - libaio-dev
+          - libattr1-dev
+          - libbrlapi-dev
+          - libbz2-dev
+          - libcacard-dev
+          - libcap-ng-dev
+          - libcurl4-gnutls-dev
+          - libdrm-dev
+          - libepoxy-dev
+          - libfdt-dev
+          - libgbm-dev
+          - libgtk-3-dev
+          - libibverbs-dev
+          - libiscsi-dev
+          - libjemalloc-dev
+          - libjpeg-turbo8-dev
+          - liblzo2-dev
+          - libncurses5-dev
+          - libncursesw5-dev
+          - libnfs-dev
+          - libnss3-dev
+          - libnuma-dev
+          - libpixman-1-dev
+          - librados-dev
+          - librbd-dev
+          - librdmacm-dev
+          - libsasl2-dev
+          - libsdl2-dev
+          - libseccomp-dev
+          - libsnappy-dev
+          - libspice-protocol-dev
+          - libssh-dev
+          - libusb-1.0-0-dev
+          - libusbredirhost-dev
+          - libvdeplug-dev
+          - libvte-2.91-dev
+          - libzstd-dev
+          - make
+          - python3-yaml
+          - python3-sphinx
+          - python3-sphinx-rtd-theme
+          - ninja-build
+          - sparse
+          - xfslibs-dev
+        state: present
+      when:
+        - ansible_facts['distribution'] == 'Ubuntu'
+
+    - name: Install packages to build QEMU on Ubuntu 18.04/20.04 on non-s390x
+      package:
+        name:
+          - libspice-server-dev
+          - libxen-dev
+        state: present
+      when:
+        - ansible_facts['distribution'] == 'Ubuntu'
+        - ansible_facts['architecture'] != 's390x'
+
+    - name: Install basic packages to build QEMU on Ubuntu 18.04
+      package:
+        name:
+        # Originally from tests/docker/dockerfiles/ubuntu1804.docker
+          - clang
+      when:
+        - ansible_facts['distribution'] == 'Ubuntu'
+        - ansible_facts['distribution_version'] == '18.04'
+
+    - name: Install basic packages to build QEMU on Ubuntu 20.04
+      package:
+        name:
+        # Originally from tests/docker/dockerfiles/ubuntu2004.docker
+          - clang-10
+          - genisoimage
+          - liblttng-ust-dev
+          - libslirp-dev
+          - netcat-openbsd
+      when:
+        - ansible_facts['distribution'] == 'Ubuntu'
+        - ansible_facts['distribution_version'] == '20.04'
diff --git a/scripts/ci/setup/inventory.template b/scripts/ci/setup/inventory.template
new file mode 100644
index 0000000000..2fbb50c4a8
--- /dev/null
+++ b/scripts/ci/setup/inventory.template
@@ -0,0 +1 @@
+localhost
-- 
2.25.4