WIP: playbook to manually start noble migration

Fixes #7416.

install_files/ansible-base/roles/noble-migration/tasks/main.yml

@@ -0,0 +1,68 @@
+---
+
+- name: Check migration JSON on mon server
+  ansible.builtin.slurp:
+    src: /etc/securedrop-noble-migration-state.json
+  register: migration_json
+  ignore_errors: yes
+
+- name: Skip migration if already done
+  set_fact:
+    already_finished: "not slurped_content.failed and {{ migration_json.content | b64decode | from_json }}['finished'] == 'Done'"
+
+- name: Perform migration
+  when: not already_finished
+  block:
+    - name: Instruct upgrade to begin
+      ansible.builtin.copy:
+        content: |
+          {
+            "app": {"enabled": true, "bucket": 5},
+            "mon": {"enabled": true, "bucket": 5}
+          }
+        dest: /usr/share/securedrop/noble-upgrade.json
+
+    - name: Start upgrade systemd service
+      ansible.builtin.systemd:
+        name: securedrop-noble-migration-upgrade
+        state: started
+
+    - name: Wait for pending updates to be applied
+      ansible.builtin.wait_for:
+        path: /etc/securedrop-noble-migration-state.json
+        search_regex: '"finished": "PendingUpdates"'
+        sleep: 1
+        timeout: 300
+      ignore_unreachable: yes
+      ignore_errors: yes
+
+    - name: Wait for the first reboot
+      ansible.builtin.wait_for_connection:
+        connect_timeout: 20
+        sleep: 5
+        delay: 10
+        timeout: 300
+
+    - name: Wait for system upgrade to noble
+      ansible.builtin.wait_for:
+        path: /etc/securedrop-noble-migration-state.json
+        search_regex: '"finished": "Reboot"'
+        sleep: 5
+        # Should finish in less than 30 minutes
+        timeout: 1800
+      ignore_unreachable: yes
+      ignore_errors: yes
+
+    - name: Wait for the second reboot
+      ansible.builtin.wait_for_connection:
+        connect_timeout: 20
+        sleep: 5
+        delay: 10
+        timeout: 300
+
+    - name: Wait for migration to complete
+      ansible.builtin.wait_for:
+        path: /etc/securedrop-noble-migration-state.json
+        search_regex: '"finished": "Done"'
+        sleep: 5
+        timeout: 300

install_files/ansible-base/securedrop-noble-migration.yml

@@ -0,0 +1,66 @@
+---
+- name: Disable OSSEC notifications
+  hosts: securedrop_monitor_server
+  max_fail_percentage: 0
+  any_errors_fatal: yes
+  environment:
+    LC_ALL: C
+  tasks:
+    - name: Disable OSSEC notifications
+      ansible.builtin.lineinfile:
+        path: /var/ossec/etc/ossec.conf
+        regexp: '<email_alert_level>7</email_alert_level>'
+        line: '<email_alert_level>15</email_alert_level>'
+      register: ossec_config
+
+    - name: Restart OSSEC service
+      ansible.builtin.systemd:
+        name: ossec
+        state: restarted
+      when: ossec_config.changed
+  become: yes
+
+- name: Perform upgrade on application server
+  hosts: securedrop_application_server
+  max_fail_percentage: 0
+  any_errors_fatal: yes
+  environment:
+    LC_ALL: C
+  roles:
+    - role: noble-migration
+      tags: noble-migration
+  become: yes
+
+- name: Perform upgrade on monitor server
+  hosts: securedrop_monitor_server
+  max_fail_percentage: 0
+  any_errors_fatal: yes
+  environment:
+    LC_ALL: C
+  roles:
+    - role: noble-migration
+      tags: noble-migration
+  become: yes
+
+# This is not really necessary since the mon migration will restore the old
+# configuration back, but let's include it for completeness.
+- name: Restore OSSEC notifications
+  hosts: securedrop_monitor_server
+  max_fail_percentage: 0
+  any_errors_fatal: yes
+  environment:
+    LC_ALL: C
+  tasks:
+    - name: Re-enable OSSEC email alerts
+      ansible.builtin.lineinfile:
+        path: /var/ossec/etc/ossec.conf
+        regexp: '<email_alert_level>15</email_alert_level>'
+        line: '<email_alert_level>7</email_alert_level>'
+      register: ossec_config
+
+    - name: Restart OSSEC service
+      ansible.builtin.systemd:
+        name: ossec
+        state: restarted
+      when: ossec_config.changed
+  become: yes