A role to install PostgreSQL Master-Slave Replication cluster.
This role will install both Master and slave in parallel. Although this role can be used indivudually (not tested), it's originally designed to work in tandem as a pair. Since PostgreSQL support multiple slave nodes, should be able to run with multiple master_node='no'.
The list of variables defined in the
| Variable Name | Description | Required (Y/N) | Default Set (Y/N) |
|---|---|---|---|
| mater_node | Select 'yes' or 'no' to select master node or the slave node. | Y | N |
| pg_master | Listening IP address of the master node | Y | N |
| pg_slave | Listening IP address of the slave node | Y | N |
| pg_version | PostgreSQL versions, supported 9.4, 9.5, 9.6 and 10 (Defaults to 10) | Y | Y |
| pg_port | Port (default 5432) | N | Y |
| pg_interface | Listening interface of the PostgreSQL server. | Y | |
| pg_lvm | Volume group name. (Default postgres) | N | Y |
| pg_pvs | Physical disk path. (Default /dev/sdb) | N | Y |
| pg_data_lv | PGDATA filesystem logical volume. (Default pgdatalv) | N | Y |
| pg_log_lv | Postgres Log filesystem logical volume. (Default /dev/sdb) | N | Y |
| pg_data | PGDATA path. (Default /postgres/data) | N | Y |
| pg_log | Postgres Log path. (Default /postgres/archivelog) | N | Y |
| pg_fs_type | Filesystem type for the new filesystems creates. (Default ext4) | N | Y |
| pg_owner | PostgreSQL process owner (Default postgres) | N | Y |
| pg_group | PostgreSQL process group. (Default postgres) | N | Y |
| pg_replica_user | PostgreSQL replica user name. (Default replica) | N | Y |
| pg_replica_password | PostgreSQL replica user password. (Default password) | N | Y |
For a single Master-Slave cluster, the following inventory can be used.
[pgcluster]
pgmaster ansible_host=10.152.0.2 master_node='yes' pg_slave='10.152.0.3'
pgslave ansible_host=10.152.0.3 master_node='no' pg_master='10.152.0.2'
The following playbook will install a Master-Slave cluster on the above two nodes.
---
- name: install pg cluster
hosts: pgcluster
become: yes
become_method: sudo
roles:
- ansible_postgresql_install
MIT
Written by Kosala Atapattu (kosala@kosala.net)