v2.0.0

roles/replication/tasks/main.yml

@@ -1,28 +1,120 @@
-- name: Create replicator user (on primary)
+---
+# Konfiguracja replikacji PostgreSQL
+# Ta rola uruchamia się na replica (pg2)
+# Tworzy użytkownika replicator i base backup z primary
+
+# --- Auto-detect PostgreSQL version na primary ---
+- name: Detect PostgreSQL version on primary
+  shell: "ls -d /etc/postgresql/*/ | head -1 | xargs basename"
+  register: pg_version_detect
+  changed_when: false
   delegate_to: pg1
-  become_user: postgres
+  run_once: true
+
+- name: Set PostgreSQL variables from detection
+  set_fact:
+    pg_version: "{{ pg_version_detect.stdout | trim }}"
+    pg_cluster: "main"
+    pg_data: "/var/lib/postgresql/{{ pg_version_detect.stdout | trim }}/main"
+    pg_bin_path: "/usr/lib/postgresql/{{ pg_version_detect.stdout | trim }}/bin"
+
+- name: Wait for PostgreSQL on primary to be ready
+  wait_for:
+    host: pg1
+    port: 5432
+    timeout: 300
+  delegate_to: pg1
+
+# --- Utworzenie użytkownika replicator na primary ---
+- name: Create replicator user on primary
   postgresql_user:
     name: replicator
     password: "{{ replicator_password }}"
     role_attr_flags: REPLICATION,LOGIN
+    login_unix_socket_directory: /var/run/postgresql
+    db: postgres
+  become: true
+  become_user: postgres
+  delegate_to: pg1
 
-- name: Stop postgres
-  service:
+# --- Przygotowanie replica ---
+- name: Stop PostgreSQL on replica
+  systemd:
     name: postgresql
     state: stopped
 
-- name: Remove old data
+- name: Remove existing cluster data on replica
   file:
     path: "{{ pg_data }}"
     state: absent
 
-- name: Base backup
+# --- Base backup z primary ---
+- name: Create replication slot on primary
+  postgresql_query:
+    db: postgres
+    query: "SELECT pg_create_physical_replication_slot('pg2_slot')"
+    login_unix_socket_directory: /var/run/postgresql
+  become: true
   become_user: postgres
-  command: >
-    pg_basebackup -h pg1 -D {{ pg_data }}
-    -U replicator -Fp -Xs -P -R
+  delegate_to: pg1
+  ignore_errors: true
 
-- name: Start postgres
-  service:
+- name: Perform base backup from primary to replica
+  shell: |
+    pg_basebackup \
+      -h pg1 \
+      -D {{ pg_data }} \
+      -U replicator \
+      -Fp \
+      -Xs \
+      -P \
+      -R \
+      -S pg2_slot
+  become: true
+  become_user: postgres
+  register: basebackup_result
+
+- name: Fix permissions on data directory
+  file:
+    path: "{{ pg_data }}"
+    owner: postgres
+    group: postgres
+    mode: "0700"
+    recurse: yes
+  become: true
+
+- name: Configure replication settings
+  lineinfile:
+    path: "{{ pg_data }}/standby.signal"
+    line: ""
+    create: yes
+    owner: postgres
+    group: postgres
+    mode: "0644"
+
+# --- Uruchomienie replica ---
+- name: Start PostgreSQL on replica
+  systemd:
     name: postgresql
     state: started
+    enabled: yes
+
+- name: Wait for PostgreSQL replica to be ready
+  wait_for:
+    path: "/var/run/postgresql/.s.PGSQL.5432"
+    timeout: 60
+    state: present
+
+- name: Verify replication on primary
+  postgresql_query:
+    db: postgres
+    query: "SELECT application_name, client_addr, state FROM pg_stat_replication"
+    login_unix_socket_directory: /var/run/postgresql
+  become: true
+  become_user: postgres
+  delegate_to: pg1
+  register: replication_status
+
+- name: Display replication status
+  debug:
+    msg: "{{ replication_status.query_result }}"