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Wait for PostgreSQL

Wait for the given PostgreSQL database to be ready and accept connections

Usage

Environment variables

Key Value Usage
WAIT_FOR_RETRIES 120 number of retries
WAIT_FOR_INTERVAL 5 wait between retries (seconds)

As this execute psql, every psql environment variable is also accepted

Example in k8s

apiVersion: batch/v1
kind: Job
metadata:
  name: migrate-postgresql
  labels:
    app: migrate-postgresql
spec:
  template:
    spec:
      containers:
        - name: migrate-postgresql
          image: knex_or_something
      initContainers:
        - name: wait-for-postgres
          image: ghcr.io/socialgouv/docker/wait-for-postgres

      # OR

      initContainers:
        - name: wait-for-postgres
          image: ghcr.io/socialgouv/docker/wait-for-postgres
          env:
            - name: PGHOST
              value: postgres-postgresql
            - name: WAIT_FOR_INTERVAL
              value: 5s # test every 5s
            - name: WAIT_FOR_RETRIES
              value: 24 # = (2min x 60s) / 5s