Add hostname support for docker runners

Author: christ-re

tasks/register-runner-container.yml

@@ -51,6 +51,9 @@
       {% if gitlab_runner.docker_network_mode is defined %}
       --docker-network-mode '{{ gitlab_runner.docker_network_mode }}'
       {% endif %}
+      {% if gitlab_runner.docker_hostname is defined %}
+      --docker-hostname '{{ gitlab_runner.docker_hostname }}'
+      {% endif %}
       --ssh-user '{{ gitlab_runner.ssh_user | default("") }}'
       --ssh-host '{{ gitlab_runner.ssh_host | default("") }}'
       --ssh-port '{{ gitlab_runner.ssh_port | default("") }}'

tasks/register-runner-windows.yml

@@ -42,6 +42,9 @@
       {% if gitlab_runner.docker_network_mode is defined %}
       --docker-network-mode '{{ gitlab_runner.docker_network_mode }}'
       {% endif %}
+      {% if gitlab_runner.docker_hostname is defined %}
+      --docker-hostname '{{ gitlab_runner.docker_hostname }}'
+      {% endif %}
       {% if gitlab_runner.ssh_user is defined %}
       --ssh-user '{{ gitlab_runner.ssh_user }}'
       {% endif %}

tasks/register-runner.yml

@@ -87,9 +87,12 @@
       {% for device in gitlab_runner.docker_devices | default([]) %}
       --docker-devices "{{ device }}"
       {% endfor %}
-      {% if gitlab_runner.docker_network_mode is defined %}
+      {% if gitlab_runner.docker_network_mode | default(false) %}
       --docker-network-mode '{{ gitlab_runner.docker_network_mode }}'
       {% endif %}
+      {% if gitlab_runner.docker_hostname is defined %}
+      --docker-hostname '{{ gitlab_runner.docker_hostname }}'
+      {% endif %}
       --ssh-user '{{ gitlab_runner.ssh_user | default("") }}'
       --ssh-host '{{ gitlab_runner.ssh_host | default("") }}'
       --ssh-port '{{ gitlab_runner.ssh_port | default("") }}'

tasks/update-config-runner-windows.yml

@@ -191,6 +191,17 @@
   check_mode: false
   notify: restart_gitlab_runner_windows
 
+- name: "Set docker hostname option {{ runn_name_prefix }}"
+  community.windows.win_lineinfile:
+    dest: "{{ temp_runner_config.path }}"
+    regexp: ^\s*hostname =.*
+    line: '  hostname = {{ gitlab_runner.docker_hostname | default("") | to_json }}'
+    state: "{{ 'present' if gitlab_runner.docker_hostname is defined else 'absent' }}"
+    insertafter: ^\s*executor =
+    backrefs: false
+  check_mode: false
+  notify: restart_gitlab_runner_windows
+
 - name: "Set cache type option {{ runn_name_prefix }}"
   community.windows.win_lineinfile:
     dest: "{{ temp_runner_config.path }}"

tasks/update-config-runner.yml

@@ -383,6 +383,20 @@
     - restart_gitlab_runner
     - restart_gitlab_runner_macos
 
+- name: "Set runner docker hostname {{ runn_name_prefix }}"
+  ansible.builtin.lineinfile:
+    dest: "{{ temp_runner_config.path }}"
+    regexp: ^\s*hostname =
+    line: '    hostname = {{ gitlab_runner.docker_hostname | default("") | to_json }}'
+    state: "{{ 'present' if gitlab_runner.docker_hostname is defined else 'absent' }}"
+    insertafter: ^\s*\[runners\.docker\]
+    backrefs: false
+  check_mode: false
+  no_log: "{{ gitlab_runner_no_log_secrets | default(omit) }}"
+  notify:
+    - restart_gitlab_runner
+    - restart_gitlab_runner_macos
+
 - name: "Set tls-cert-file option {{ runn_name_prefix }}"
   ansible.builtin.lineinfile:
     dest: "{{ temp_runner_config.path }}"

templates/config.toml.j2

@@ -115,6 +115,9 @@ sentry_dsn = "{{ gitlab_runner_sentry_dsn }}"
 {% if gitlab_runner.docker_network_mode is defined %}
     network_mode = {{ gitlab_runner.docker_network_mode | default("bridge") | tojson }}
 {% endif %}
+{% if gitlab_runner.docker_hostname is defined %}
+    hostname = {{ gitlab_runner.docker_hostname | default("") | tojson }}
+{% endif %}
 {% if gitlab_runner.docker_disable_entrypoint_overwrite is defined %}
     disable_entrypoint_overwrite = {{ gitlab_runner.docker_disable_entrypoint_overwrite | default(false) | tojson }}
 {% endif %}