[switchboard] Add Ansible role install_test_machine_monitor.
Note that this uses the Makefile targets for //machine:
https://skia.googlesource.com/buildbot/+/refs/heads/main/machine/Makefile#84
Bug: skia:12063
Change-Id: I1214de37c24be8c83fadeaeb760cc2a872708a40
Reviewed-on: https://skia-review.googlesource.com/c/buildbot/+/434470
Reviewed-by: Kevin Lubick <kjlubick@google.com>
diff --git a/skolo/ansible/switchboard/roles/install_test_machine_monitor/README.md b/skolo/ansible/switchboard/roles/install_test_machine_monitor/README.md
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@@ -0,0 +1,31 @@
+# Role Name
+
+`install_test_machine_monitor`
+
+## Description
+
+Compiles and installs `test_machine_monitor` to the machine.
+
+## Variables Required
+
+Requires `gather_facts` to detect the target operating system.
+
+This role uses the `skolo_account` variable defined in
+`//skolo/ansible/group_vars/all.yml` and potentially overridden in `hosts.ini`.
+
+## Arguments
+
+Takes a single boolean argument `start_swarming` that controls whether or not
+`test_machine_monitor` should be passed the `--start_swarming` flag.
+
+## Example Playbook
+
+```
+# Install test_machine_monitor that doesn't launch Swarming.
+- hosts: "{{ variable_hosts | default('rpis') }}"
+ user: chrome-bot
+ gather_facts: yes
+
+ roles:
+ - { role: install_test_machine_monitor, start_swarming: false }
+```
diff --git a/skolo/ansible/switchboard/roles/install_test_machine_monitor/meta/argument_specs.yml b/skolo/ansible/switchboard/roles/install_test_machine_monitor/meta/argument_specs.yml
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+---
+argument_specs:
+ main:
+ short_description:
+ Arguments that can be passed to the install_test_machine_monitor role.
+ options:
+ start_swarming:
+ type: 'boolean'
+ required: false
+ default: false
+ description:
+ 'If true then test_machine_monitor will also spawn swarming.'
diff --git a/skolo/ansible/switchboard/roles/install_test_machine_monitor/tasks/main.yml b/skolo/ansible/switchboard/roles/install_test_machine_monitor/tasks/main.yml
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+---
+- name: Build test_machine_monitor for the target machine.
+ delegate_to: 127.0.0.1
+ make:
+ chdir: '{{ role_path }}/../../../../../machine/'
+ target:
+ "build_test_machine_monitor_{{ ansible_facts['architecture'] }}_{{
+ ansible_facts['system'] }}"
+
+- name: Copy over service file.
+ become: yes
+ template:
+ src: templates/test_machine_monitor.service
+ dest: /etc/systemd/system/test_machine_monitor.service
+ owner: root
+ group: root
+ mode: '0644'
+
+- name: Copy over executable.
+ become: yes
+ copy:
+ src:
+ "{{ role_path }}/../../../../../machine/build/{{ ansible_facts['system']
+ }}/{{ ansible_facts['architecture'] }}/test_machine_monitor"
+ dest: /usr/local/bin/test_machine_monitor
+ owner: root
+ group: root
+ mode: '0755'
+
+- name: Start systemd servce.
+ become: yes
+ systemd:
+ enabled: yes
+ # Do not force a restart, we'll just pick up the new version on reboot.
+ state: started
+ name: test_machine_monitor
+ daemon_reload: yes
diff --git a/skolo/ansible/switchboard/roles/install_test_machine_monitor/templates/test_machine_monitor.service b/skolo/ansible/switchboard/roles/install_test_machine_monitor/templates/test_machine_monitor.service
new file mode 100644
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+++ b/skolo/ansible/switchboard/roles/install_test_machine_monitor/templates/test_machine_monitor.service
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+[Unit]
+Description=test_machine_monitor
+After=syslog.target network.target
+
+[Service]
+Type=simple
+User=chrome-bot
+{% if start_swarming is true %}
+Environment=SWARMING_BOT_ID={{ ansible_facts['hostname'] }}
+{% endif %}
+ExecStart=/usr/local/bin/test_machine_monitor \
+ --config=prod.json \
+ --metadata_url=http://metadata/computeMetadata/v1/instance/service-accounts/default/token \
+ {% if start_swarming is true %}
+ --python_exe=/usr/bin/python3 \
+ --start_swarming \
+ {% endif %}
+ --username=chrome-bot
+Restart=always
+
+[Install]
+WantedBy=multi-user.target
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