nixos/manifests/databases/postgres-cluster.yaml

apiVersion: postgresql.cnpg.io/v1
kind: Cluster
metadata:
  name: postgres
spec:
  instances: 1
  enablePDB: false
  storage:
    size: 100Gi
  primaryUpdateStrategy: unsupervised

  managed:
    roles:
      - name: gitlab
        ensure: present
        comment: Gitlab user
        login: true
        superuser: false
        passwordSecret:
          name: postgres-user-gitlab
      - name: pgadmin
        ensure: present
        comment: PG Admin user
        login: true
        superuser: true
        passwordSecret:
          name: postgres-user-pgadmin
      - name: matrix
        ensure: present
        comment: Matrix DB user
        login: true
        superuser: false
        passwordSecret:
          name: postgres-user-matrix

  plugins:
    - name: barman-cloud.cloudnative-pg.io
      isWALArchiver: true
      parameters:
        barmanObjectName: k3sbackup-objectstore

# Use this as the target of the bootstrap recovery process
# It is important that the `externalClusters` serverName matches
# the old name of the original cluster that you are upgrading.
# When restoring, set the targetTime to the latest backup that you
# want to restore to
# bootstrap:
#   recovery:
#     source: origin
#     recoveryTarget:
#       targetTime: "2025-08-25 19:00:40+05"
# externalClusters:
#   - name: origin
#     plugin:
#       name: barman-cloud.cloudnative-pg.io
#       parameters:
#         barmanObjectName: k3sbackup-objectstore
#         serverName: postgres
---
apiVersion: barmancloud.cnpg.io/v1
kind: ObjectStore
metadata:
  name: k3sbackup-objectstore
spec:
  configuration:
    destinationPath: "s3://k3sbackup/postgres"
    endpointURL: "http://s3.thehellings.lan:9000/"
    s3Credentials:
      accessKeyId:
        name: k3sbackup-secret
        key: username
      secretAccessKey:
        name: k3sbackup-secret
        key: password
    wal:
      compression: gzip
---
apiVersion: postgresql.cnpg.io/v1
kind: ScheduledBackup
metadata:
  name: postgres-backup
spec:
  immediate: true # Create one when this is added to the cluster
  schedule: "0 1 0 * * *" # 1AM, nightly
  backupOwnerReference: self
  cluster:
    name: postgres
  method: plugin
  pluginConfiguration:
    name: barman-cloud.cloudnative-pg.io