step 4 : fix replication :D

inventories/gcp.yaml

 all:
   hosts:
     PrimaryVM:
-      ansible_host: 34.133.70.45
+      ansible_host: 35.202.23.190
       ansible_user: louanbelicaud
       ansible_port: 22
       ansible_ssh_private_key_file: "/Users/louanbelicaud/.ssh/google_compute_engine"
     StandbyVM:
-      ansible_host: 34.28.59.62
+      ansible_host: 130.211.227.208
       ansible_user: louanbelicaud
       ansible_port: 22
       ansible_ssh_private_key_file: "/Users/louanbelicaud/.ssh/google_compute_engine"

playbook.yml

@@ -11,10 +11,10 @@
   hosts: PrimaryVM
   become: true
   roles:
-    - { role: pg_replication, postgresql_mode: "primary", postgresql_standby_ip: "34.28.59.62" }
+    - { role: pg_replication, postgresql_mode: "primary", postgresql_standby_ip: "130.211.227.208" }
 
 - name: Configure PostgreSQL on Standby VM
   hosts: StandbyVM
   become: true
   roles:
-    - { role: pg_replication, postgresql_mode: "standby", postgresql_primary_ip: "34.133.70.45" }
+    - { role: pg_replication, postgresql_mode: "standby", postgresql_primary_ip: "35.202.23.190" }

roles/pg_replication/tasks/task_primary.yaml

 - name: Debug postgresql_mode before including tasks
   debug:
     msg: "postgresql_mode is currently set to {{ postgresql_mode }} for inventory host {{ inventory_hostname }}"
-- name: Connect to postgres database, create postgres replicator, and grant access to database
+
+- name: Create replication user
   community.postgresql.postgresql_user:
     db: postgres
     name: replicator
@@ -9,21 +10,22 @@
     role_attr_flags: "replication"
   become: yes
   become_user: postgres
-- name: Do show hba_file
+
+- name: Get hba_file path
   community.postgresql.postgresql_query:
     query: "SHOW hba_file"
   register: hba_file
   become: yes
   become_user: postgres
-- name: debug show postgresql_standby_ip
+
+- name: Show postgresql_standby_ip
   ansible.builtin.debug:
     msg: "The postgresql_standby_ip is {{ postgresql_standby_ip }}"
-  become: yes
-  become_user: postgres
-- name: Grant connexion to user replicator
+
+- name: Grant replication connection to replicator user
   community.postgresql.postgresql_pg_hba:
     dest: "{{ hba_file.query_result[0]['hba_file'] }}"
-    contype: hostssl
+    contype: host
     users: replicator
     source: 0.0.0.0/0
     databases: replication
@@ -31,24 +33,19 @@
     address: "{{ postgresql_standby_ip }}"
   become: yes
   become_user: postgres
-- name: Set wal_level to replica and max_wal_senders to 10
+
+- name: Configure PostgreSQL parameters
   community.postgresql.postgresql_set:
     name: "{{ item.name }}"
     value: "{{ item.value }}"
   loop:
     - { name: "wal_level", value: "replica" }
     - { name: "max_wal_senders", value: "10" }
+    - { name: "wal_keep_size", value: "512MB" }
   become: yes
   become_user: postgres
-- name: Set wal_keep_size to 1GB in postgresql.conf
-  ansible.builtin.lineinfile:
-    path: /etc/postgresql/15/main/postgresql.conf
-    regexp: '^#?wal_keep_size\s*='
-    line: 'wal_keep_size = 1GB'
-    backrefs: yes
-  become: yes
-  become_user: root
-- name: restart postgresql
+
+- name: Restart PostgreSQL
   ansible.builtin.systemd:
     name: postgresql
     state: restarted

roles/pg_replication/tasks/task_standby.yaml

 - name: Debug postgresql_mode before including tasks
   debug:
     msg: "postgresql_mode is currently set to {{ postgresql_mode }} for inventory host {{ inventory_hostname }}"
-- name: Connect to postgres database, create postgres replicator, and grant access to database
+
+- name: Create replication user
   community.postgresql.postgresql_user:
     db: postgres
     name: replicator
@@ -9,18 +10,19 @@
     role_attr_flags: "replication"
   become: yes
   become_user: postgres
-- name: Do show hba_file
+
+- name: Get hba_file path
   community.postgresql.postgresql_query:
     query: "SHOW hba_file"
   register: hba_file
   become: yes
   become_user: postgres
-- name: debug show postgresql_primary_ip
+
+- name: Show postgresql_primary_ip
   ansible.builtin.debug:
     msg: "The postgresql_primary_ip is {{ postgresql_primary_ip }}"
-  become: yes
-  become_user: postgres
-- name: Grant connexion to user replicator
+
+- name: Grant replication connection to replicator user
   community.postgresql.postgresql_pg_hba:
     dest: "{{ hba_file.query_result[0]['hba_file'] }}"
     contype: host
@@ -31,6 +33,7 @@
     address: "{{ postgresql_primary_ip }}"
   become: yes
   become_user: postgres
+
 - name: Configure PostgreSQL parameters
   community.postgresql.postgresql_set:
     name: "{{ item.name }}"
@@ -40,23 +43,18 @@
     - { name: "wal_level", value: "replica" }
     - { name: "max_wal_senders", value: "10" }
     - { name: "hot_standby", value: "on" }
+    - { name: "wal_keep_size", value: "1GB" }
   become: yes
   become_user: postgres
-- name: Set wal_keep_size to 1GB in postgresql.conf
-  ansible.builtin.lineinfile:
-    path: /etc/postgresql/15/main/postgresql.conf
-    regexp: '^#?wal_keep_size\s*='
-    line: 'wal_keep_size = 1GB'
-    backrefs: yes
-  become: yes
-  become_user: root
-- name: restart postgresql
+
+- name: Restart PostgreSQL
   ansible.builtin.systemd:
     name: postgresql
     state: restarted
   become: yes
   become_user: root
-- name: Create .pgpass from template file
+
+- name: Create .pgpass file
   template:
     src: pgpass_template.j2
     dest: /tmp/.pgpass
@@ -67,54 +65,55 @@
     USER_REPLICATOR: "replicator"
     PW_REPLICATOR: "replicator"
     IP_PRIMARY: "{{ postgresql_primary_ip }}"
-- name: Show data_directory
+
+- name: Get data_directory path
   community.postgresql.postgresql_query:
     query: "SHOW data_directory"
   register: data_directory
   become: yes
   become_user: postgres
-- name: Debug data_directory
-  ansible.builtin.debug:
-    msg: "The data_directory path is {{ data_directory.query_result[0]['data_directory'] }}"
-  become: yes
-  become_user: root
-- name: Stop the postgresql service
-  ansible.builtin.service:
+
+- name: Stop PostgreSQL
+  ansible.builtin.systemd:
     name: postgresql
     state: stopped
   become: yes
   become_user: root
-- name: Delete the repository data_directory
+
+- name: Remove data_directory
   ansible.builtin.file:
-    name: "{{ data_directory.query_result[0]['data_directory'] }}"
+    path: "{{ data_directory.query_result[0]['data_directory'] }}"
     state: absent
   become: yes
   become_user: root
-- name: Add repository directory
+
+- name: Recreate data_directory
   ansible.builtin.file:
-    name: "{{ data_directory.query_result[0]['data_directory'] }}"
+    path: "{{ data_directory.query_result[0]['data_directory'] }}"
     state: directory
+    owner: postgres
     group: postgres
     mode: "0700"
   become: yes
   become_user: root
-- name: Exec pg_basebackup
-  tags: pg_basebackup
-  ansible.builtin.command: pg_basebackup -h "{{ postgresql_primary_ip }}" -U replicator -p 5432 -D /var/lib/postgresql/15/main -X stream
-  vars:
+
+- name: Execute pg_basebackup
+  ansible.builtin.command: >
+    pg_basebackup -R -h "{{ postgresql_primary_ip }}" -U replicator -p 5432 -D {{ data_directory.query_result[0]['data_directory'] }} -X stream
+  environment:
     PGPASSFILE: "/tmp/.pgpass"
   become: yes
   become_user: postgres
-- name: Delete the file /tmp/.pgpass
+
+- name: Remove .pgpass file
   ansible.builtin.file:
     path: /tmp/.pgpass
     state: absent
-    group: postgres
-    mode: "0600"
   become: yes
   become_user: root
-- name: Start the postgresql service
-  ansible.builtin.service:
+
+- name: Start PostgreSQL
+  ansible.builtin.systemd:
     name: postgresql
     state: started
   become: yes