computer-playbook/roles/svc-db-postgres/vars/main.yml

# General
application_id:                           svc-db-postgres
entity_name:                              "{{ application_id | get_entity_name }}"

# Docker
docker_compose_flush_handlers:            true

# Docker Compose
database_type:                            "{{ entity_name }}"

## Postgres
POSTGRES_VOLUME:                          "{{ applications | get_app_conf(application_id, 'docker.volumes.data') }}"
POSTGRES_CONTAINER:                       "{{ applications | get_app_conf(application_id, 'docker.services.' ~ entity_name ~ '.name') }}"
POSTGRES_IMAGE:                           "{{ applications | get_app_conf(application_id, 'docker.services.' ~ entity_name ~ '.image') }}"
POSTGRES_VERSION:                         "{{ applications | get_app_conf(application_id, 'docker.services.' ~ entity_name ~ '.version') }}"
POSTGRES_VERSION_MAJOR:                   "{{ POSTGRES_VERSION | regex_replace('^([0-9]+).*', '\\1') }}"
POSTGRES_NETWORK_NAME:                    "{{ applications | get_app_conf(application_id, 'docker.network') }}"
POSTGRES_SUBNET:                          "{{ networks.local['svc-db-postgres'].subnet }}"
POSTGRES_PASSWORD:                        "{{ applications | get_app_conf(application_id, 'credentials.POSTGRES_PASSWORD') }}"
POSTGRES_PORT:                            "{{ database_port | default(ports.localhost.database[ application_id ]) }}"
POSTGRES_EXPOSE_LOCAL:                    True # Exposes the db to localhost, almost everytime neccessary
POSTGRES_CUSTOM_IMAGE_NAME:               "postgres_custom"
POSTGRES_LOCAL_HOST:                      "127.0.0.1"
POSTGRES_VECTOR_ENABLED:                  True # Required by discourse, propably in a later step it makes sense to define this as a configuration option in config/main.yml
POSTGRES_RETRIES:                         5

## Performance
POSTGRES_TOTAL_RAM_MB:                    "{{ ansible_memtotal_mb | int }}"
POSTGRES_VCPUS:                           "{{ ansible_processor_vcpus | int }}"
POSTGRES_MAX_CONNECTIONS:                 "{{ [ ((POSTGRES_VCPUS | int) * 30 + 50), 400 ] | min }}"
POSTGRES_SUPERUSER_RESERVED_CONNECTIONS:  3
POSTGRES_SHARED_BUFFERS_MB:               "{{ ((POSTGRES_TOTAL_RAM_MB | int) * 25) // 100 }}"
POSTGRES_SHARED_BUFFERS:                  "{{ POSTGRES_SHARED_BUFFERS_MB ~ 'MB' }}"
POSTGRES_WORK_MEM_MB:                     "{{ [ ( (POSTGRES_TOTAL_RAM_MB | int) // ( [ (POSTGRES_MAX_CONNECTIONS | int), 1 ] | max ) // 2 ), 1 ] | max }}"
POSTGRES_WORK_MEM:                        "{{ POSTGRES_WORK_MEM_MB ~ 'MB' }}"
POSTGRES_MAINTENANCE_WORK_MEM_MB:         "{{ [ (((POSTGRES_TOTAL_RAM_MB | int) * 5) // 100), 64 ] | max }}"
POSTGRES_MAINTENANCE_WORK_MEM:            "{{ POSTGRES_MAINTENANCE_WORK_MEM_MB ~ 'MB' }}"
POSTGRES_DELAY:                           2