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master.yml
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master.yml
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---
- name: Check if database is already initialized
stat:
path: '/var/lib/pgsql/12/data/PG_VERSION'
register: init_status
- name: Initialize the PostgreSQL database
shell: "/usr/pgsql-12/bin/postgresql-12-setup initdb"
when: inventory_hostname in groups['dbmaster'] and init_status.stat.exists == False
notify: Restart database
- name: Flush handler
meta: flush_handlers
- name: Enable replication user to login
become: true
become_user: postgres
blockinfile:
path: /var/lib/pgsql/12/data/pg_hba.conf
block: |
{% for host in groups['all'] %}
host replication repmgr {{ hostvars[host]['ansible_facts']['eth1']['ipv4']['address'] }}/32 trust
host repmgr repmgr {{ hostvars[host]['ansible_facts']['eth1']['ipv4']['address'] }}/32 trust
{% endfor %}
host all all 0.0.0.0/0 md5
register: pghba_config
- name: Start and enable PostgreSQL service on boot
systemd:
name: postgresql-12.service
state: started
enabled: yes
- name: Configure DBs to listen on ip address
postgresql_set:
name: listen_addresses
value: '*'
register: postgresql_config
become: true
become_user: postgres
- name: Configure wal_level parameter
postgresql_set:
name: wal_level
value: 'replica'
register: postgresql_config
become: true
become_user: postgres
- name: Configure repmgr shared libraries parameter
postgresql_set:
name: shared_preload_libraries
value: 'repmgr'
register: postgresql_config
become: true
become_user: postgres
- name: Configure wal_log_hints parameter
postgresql_set:
name: wal_log_hints
value: 'on'
register: postgresql_config
become: true
become_user: postgres
- name: Configure max_wal_senders parameter
postgresql_set:
name: max_wal_senders
value: '10'
register: postgresql_config
become: true
become_user: postgres
- name: Configure wal_keep_segments parameter
postgresql_set:
name: wal_keep_segments
value: '8'
register: postgresql_config
become: true
become_user: postgres
- name: Configure hot_standby parameter
postgresql_set:
name: hot_standby
value: 'on'
register: postgresql_config
become: true
become_user: postgres
- name: Configure archive_mode parameter
postgresql_set:
name: archive_mode
value: 'on'
register: postgresql_config
become: true
become_user: postgres
- name: Configure archive_command parameter
postgresql_set:
name: archive_command
value: '/bin/true'
register: postgresql_config
become: true
become_user: postgres
- name: Restart PostgreSQL to apply config changes
systemd:
name: postgresql-12.service
state: restarted
changed_when: False
- name: Create repmgr user in PostgreSQL
postgresql_user:
name: repmgr
role_attr_flags: REPLICATION,CREATEDB,CREATEROLE,SUPERUSER
become: true
become_user: postgres
- name: Create repmgr database owner repmgr in PostgreSQL
postgresql_db:
name: repmgr
owner: repmgr
state: present
become: true
become_user: postgres
- name: Alter repmgr user and set search path
command: psql -c 'ALTER USER repmgr SET search_path TO repmgr, public;'
become: true
become_user: postgres
changed_when: False
- name: Check if repmgr is started
stat:
path: '/run/repmgr/repmgrd-12.pid'
register: repmgr_service
- name: Register Master in repmgr
command: /usr/pgsql-12/bin/repmgr primary register -F
become: true
become_user: postgres
when: repmgr_service.stat.exists == False
changed_when: False
- name: Start repmgr service
systemd:
name: repmgr12.service
state: restarted
enabled: yes
changed_when: False
- name: Check repmgr daemon status
command: /usr/pgsql-12/bin/repmgr daemon status
become: true
become_user: postgres
register: repmgr_status
when: repmgr_service.stat.exists == True
changed_when: False
- debug:
var: repmgr_status.stdout
changed_when: False