ansible-roles/postgresql/defaults/main.yml

---
pg_use_postgresql_org_repo: True

psql_postgresql_install: True
psql_pkg_state: installed
postgresql_enabled: True
psql_pgpool_install: False
psql_pgpool_service_install: False
psql_pgpool_pkg_state: installed
# 9.3 is the default version for Ubuntu trusty
# It is highly recommended to use the postgresql.org repositories
#
# See the features matrix here: http://www.postgresql.org/about/featurematrix/
#
psql_version: 9.4
psql_db_host: localhost
psql_db_port: 5432
psql_db_size_w: 150000000
psql_db_size_c: 170000000
psql_listen_on_ext_int: False
psql_use_alternate_data_dir: False
psql_data_dir: '/var/lib/postgresql/{{ psql_version }}'
psql_log_dir: /var/log/postgresql
psql_conf_parameters:
  - { name: 'max_connections', value: '100', set: 'False' }
  - { name: 'shared_buffers', value: '24MB', set: 'False' }
  - { name: 'temp_buffers', value: '8MB', set: 'False' }
  - { name: 'work_mem', value: '1MB', set: 'False' }
  - { name: 'maintenance_work_mem', value: '16MB', set: 'False' }
  - { name: 'max_stack_depth', value: '2MB', set: 'False' }
  - { name: 'checkpoint_segments', value: '3', set: 'False' }
  - { name: 'max_files_per_process', value: '1000', set: 'False' }

# SSL as a special case
psql_enable_ssl: False
postgresql_letsencrypt_managed: True
psql_conf_ssl_parameters:
  - { name: 'ssl', value: 'true' }
  - { name: 'ssl_cert_file', value: '/var/lib/acme/live/{{ ansible_fqdn }}/cert' }
  - { name: 'ssl_key_file', value: '/etc/pki/postgresql/postgresql.key' }
  - { name: 'ssl_ca_file', value: '/var/lib/acme/live/{{ ansible_fqdn }}/chain' }

psql_set_shared_memory: False
psql_sysctl_file: 30-postgresql-shm.conf
psql_sysctl_kernel_sharedmem_parameters:
  - { name: 'kernel.shmmax', value: '33554432' }
  - { name: 'kernel.shmall', value: '2097152' }

postgresql_pkgs:
  - 'postgresql-{{ psql_version }}'
  - 'postgresql-contrib-{{ psql_version }}'  
  - 'postgresql-client-{{ psql_version }}'
  - pgtop

psql_ansible_needed_pkgs:
  - python-psycopg2
#  - libpq-dev
psql_db_name: db_name
psql_db_user: db_user
psql_db_pwd: "We cannot save the password into the repository. Use another variable and change pgpass.j2 accordingly. Encrypt the file that contains the variable with ansible-vault"

# Those need to be installed on the postgresql server.
postgresql_pgpool_pkgs:
  - 'postgresql-{{ psql_version }}-pgpool2'

#psql_db_data:
  # Example of line needed to create a db, create the user that owns the db, manage the db accesses (used by iptables too). All the fields are mandatory.
  #- { name: '{{ psql_db_name }}', encoding: 'UTF8', user: '{{ psql_db_user }}', pwd: '{{ psql_db_pwd }}', roles: 'NOCREATEDB,NOSUPERUSER', extensions: [ 'postgis', 'pgpool_regclass', 'pgpool_recovery' ], allowed_hosts: [ 'xxx.xxx.xxx.xxx/32', 'yyy.yyy.yyy.yyy/32' ] }
  # Example of line needed to manage the db accesses (used by iptables too), without creating the db and the user. Useful, for example, to give someone access to the postgresql db
  #- { name: '{{ psql_db_name }}', user: '{{ psql_db_user }}', allowed_hosts: [ 'xxx.xxx.xxx.xxx/32', 'yyy.yyy.yyy.yyy/32' ] }


# pgpool-II
pgpool_pkgs:
  - pgpool2

pgpool_enabled: True
pgpool_listen_addresses: 'localhost'
pgpool_port: 5433
pgpool_listen_backlog_multiplier: 2
pgpool_pcp_user: admin
# Define pcp_pwd in a vault file
pgpool_pcp_listen_addresses: '*'
pgpool_pcp_port: 9898
#pgpool_backends:
#  - { id: 0, hostname: 'backend0', backend_port: '{{ psql_db_port }}', backend_weight: 1, backend_data_directory: '{{ psql_data_dir }}', backend_flag: 'ALLOW_TO_FAILOVER' }
pgpool_enable_pool_hba: 'on'
pgpool_pool_passwd: 'pool_passwd'
pgpool_num_init_children: 32
pgpool_max_pool: 4
pgpool_child_life_time: 300
pgpool_child_max_connections: 0
pgpool_connection_life_time: 0
pgpool_client_idle_limit: 0
pgpool_log_destination: syslog
pgpool_log_connections: 'on'
pgpool_log_hostname: 'on'
pgpool_log_statement: 'off'
pgpool_log_per_node_statement: 'off'
pgpool_debug_level: 0
pgpool_replication_mode: 'on'
pgpool_replicate_select: 'off'
pgpool_insert_lock: 'on'
pgpool_lobj_lock_table: ''
pgpool_replication_stop_on_mismatch: 'on'
pgpool_failover_if_affected_tuples_mismatch: 'off'
pgpool_recovery_timeout: 30
pgpool_client_idle_limit_in_recovery: -1
pgpool_load_balance_mode: 'on'
pgpool_ignore_leading_white_space: 'on'
pgpool_recovery_user: postgres
# pgpool_recovery_user_pwd: use a vault file for this one
pgpool_recovery_stage1_script: pgpool_recovery_stage_1
pgpool_recovery_stage2_script: pgpool_recovery_stage_2
pgpool_remote_start_script: pgpool_remote_start
pgpool_white_function_list: ''
pgpool_black_function_list: 'nextval,setval'
pgpool_allow_sql_comments: 'on'
pgpool_fail_over_on_backend_error: 'on'
pgpool_relcache_expire: 3600
pgpool_memory_cache_enabled: 'off'
pgpool_memqcache_method: memcached
pgpool_memqcache_memcached_host: localhost
pgpool_memqcache_memcached_port: 11211
pgpool_memqcache_expire: 0
pgpool_memqcache_auto_cache_invalidation: 'on'

# WAL files archiving is mandatory for pgpool recovery
psql_wal_files_archiving_enabled: '{{ psql_pgpool_install }}'
psql_restart_after_wal_enabling: True
psql_wal_archiving_log_dir: '{{ psql_data_dir }}/archive_log'
psql_base_backup_dir: '{{ pg_backup_base_dir }}/base_backup'
psql_wal_files_conf:
  - { name: 'wal_level', value: 'archive', set: '{{ psql_wal_files_archiving_enabled }}' }
  - { name: 'wal_sync_method', value: 'fdatasync', set: '{{ psql_wal_files_archiving_enabled }}' }
  - { name: 'full_page_writes', value: 'on', set: '{{ psql_wal_files_archiving_enabled }}' }
  - { name: 'wal_log_hints', value: 'on', set: '{{ psql_wal_files_archiving_enabled }}' }
  - { name: 'archive_mode', value: 'on', set: '{{ psql_wal_files_archiving_enabled }}' }
  - { name: 'archive_command', value: "'test ! -f {{ psql_wal_archiving_log_dir }}/%f && cp %p {{ psql_wal_archiving_log_dir }}/%f'", set: '{{ psql_wal_files_archiving_enabled }}' }
  - { name: 'archive_timeout', value: '120', set: '{{ psql_wal_files_archiving_enabled }}' }
  - { name: 'max_wal_senders', value: '5', set: '{{ psql_wal_files_archiving_enabled }}' }
  - { name: 'wal_sender_timeout', value: '60s', set: '{{ psql_wal_files_archiving_enabled }}' }
  - { name: 'max_replication_slots', value: '5', set: '{{ psql_wal_files_archiving_enabled }}' }

  
# postgis
postgres_install_gis_extensions: False
postgres_gis_version: 2.1
postgres_gis_pkgs:
  - 'postgresql-{{ psql_version }}-postgis-{{ postgres_gis_version }}'

# Local backup  
pg_backup_enabled: True
pg_backup_bin: /usr/local/sbin/postgresql-backup
pg_backup_pgdump_bin: /usr/bin/pg_dump
pg_backup_retain_copies: 15
pg_backup_build_db_list: "no"
# Dynamically created from psql_db_data if pg_backup_db_list is not set
#pg_backup_db_list: '{{ psql_db_name}}'
pg_backup_base_dir: /var/lib/pgsql
pg_backup_destdir: '{{ pg_backup_base_dir }}/backups'
pg_backup_logdir: /var/log/postgresql
pg_backup_logfile: '{{ pg_backup_logdir }}/postgresql-backup.log'
pg_backup_use_auth: "yes"
pg_backup_pass_file: /root/.pgpass
pg_backup_use_nagios: "yes"