123 lines
2.9 KiB
YAML
123 lines
2.9 KiB
YAML
---
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# Przywrócenie primary z pg2 (replica)
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# Używany w przypadku awarii pg1
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# --- Auto-detect PostgreSQL version na replica ---
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- name: Detect PostgreSQL version on replica
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shell: "ls -d /etc/postgresql/*/ | head -1 | xargs basename"
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register: pg_version_detect
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changed_when: false
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delegate_to: pg2
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run_once: true
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- name: Set PostgreSQL variables from detection
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set_fact:
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pg_version: "{{ pg_version_detect.stdout | trim }}"
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pg_cluster: "main"
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pg_data: "/var/lib/postgresql/{{ pg_version_detect.stdout | trim }}/main"
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pg_bin_path: "/usr/lib/postgresql/{{ pg_version_detect.stdout | trim }}/bin"
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- name: Wait for replica to be accessible
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wait_for:
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host: pg2
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port: 5432
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timeout: 300
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# --- Promowanie replica ---
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- name: Promote replica to primary
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shell: "{{ pg_bin_path }}/pg_ctl promote -D {{ pg_data }}"
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become: true
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become_user: postgres
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delegate_to: pg2
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register: promote_result
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- name: Wait for promoted replica to be ready
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wait_for:
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host: pg2
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port: 5432
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timeout: 60
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# --- Przywrócenie na pg1 ---
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- name: Stop PostgreSQL on primary (pg1)
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systemd:
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name: postgresql
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state: stopped
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ignore_errors: true
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- name: Remove old cluster data on primary
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file:
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path: "{{ pg_data }}"
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state: absent
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become: true
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# --- Base backup z nowego primary (pg2) ---
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- name: Perform base backup from new primary (pg2)
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shell: |
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pg_basebackup \
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-h pg2 \
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-D {{ pg_data }} \
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-U replicator \
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-Fp \
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-Xs \
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-P \
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-R
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become: true
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become_user: postgres
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register: restore_basebackup
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- name: Fix permissions on restored data directory
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file:
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path: "{{ pg_data }}"
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owner: postgres
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group: postgres
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mode: "0700"
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recurse: yes
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become: true
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- name: Configure recovery settings
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lineinfile:
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path: "{{ pg_data }}/standby.signal"
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line: ""
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create: yes
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owner: postgres
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group: postgres
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mode: "0644"
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# --- Uruchomienie pg1 ---
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- name: Start PostgreSQL on primary
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systemd:
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name: postgresql
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state: started
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enabled: yes
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- name: Wait for PostgreSQL to start
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wait_for:
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path: "/var/run/postgresql/.s.PGSQL.5432"
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timeout: 60
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# --- Weryfikacja ---
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- name: Verify primary is accessible
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postgresql_query:
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db: postgres
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query: "SELECT version()"
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login_unix_socket_directory: /var/run/postgresql
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become: true
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become_user: postgres
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register: version_check
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- name: Display restoration result
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debug:
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msg: "Primary restored successfully. PostgreSQL: {{ version_check.query_result[0].version }}"
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- name: Display manual failover instructions
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debug:
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msg: |
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Restoration complete!
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Next steps:
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1. Verify pg1 and pg2 connectivity
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2. Update application connection strings if needed
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3. Monitor replication status:
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SELECT * FROM pg_stat_replication;
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4. Schedule regular test restores
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