Quickstart

This guide provides quick examples for running backups using Docker CLI, Docker Compose, and Kubernetes.

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Simple Backup Using Docker CLI

To run a one-time backup, bind your local volume to /backup in the container and execute the backup command:

docker run --rm --network your_network_name \
  -v $PWD/backup:/backup/ \
  -e "DB_HOST=dbhost" \
  -e "DB_USERNAME=username" \
  -e "DB_PASSWORD=password" \
  jkaninda/pg-bkup backup -d database_name

Using an Environment File

Alternatively, you can use an --env-file to pass a full configuration:

docker run --rm --network your_network_name \
  --env-file your-env-file \
  -v $PWD/backup:/backup/ \
  jkaninda/pg-bkup backup -d database_name

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Simple Backup Using Docker Compose

Below is an example docker-compose.yml configuration for running a backup:

services:
  pg-bkup:
    # In production, lock the image tag to a specific release version.
    # Check https://github.com/jkaninda/pg-bkup/releases for available releases.
    image: jkaninda/pg-bkup
    container_name: pg-bkup
    command: backup
    volumes:
      - ./backup:/backup
    environment:
      - DB_PORT=5432
      - DB_HOST=postgres
      - DB_NAME=foo
      - DB_USERNAME=bar
      - DB_PASSWORD=password
      - TZ=Europe/Paris
    # Ensure the pg-bkup container is connected to the same network as your database.
    networks:
      - web

networks:
  web:

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Recurring Backup with Docker

To schedule recurring backups, use the --cron-expression flag:

docker run --rm --network network_name \
  -v $PWD/backup:/backup/ \
  -e "DB_HOST=hostname" \
  -e "DB_USERNAME=user" \
  -e "DB_PASSWORD=password" \
  jkaninda/pg-bkup backup -d dbName --cron-expression "@every 15m"

For predefined schedules, refer to the documentation.

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Backup Using Kubernetes

Below is an example Kubernetes Job configuration for running a backup:

apiVersion: batch/v1
kind: Job
metadata:
  name: backup-job
spec:
  ttlSecondsAfterFinished: 100
  template:
    spec:
      containers:
        - name: pg-bkup
          # In production, lock the image tag to a specific release version.
          # Check https://github.com/jkaninda/pg-bkup/releases for available releases.
          image: jkaninda/pg-bkup
          command:
            - /bin/sh
            - -c
            - backup -d dbname
          resources:
            limits:
              memory: "128Mi"
              cpu: "500m"
          env:
            - name: DB_HOST
              value: "postgres"
            - name: DB_USERNAME
              value: "postgres"
            - name: DB_PASSWORD
              value: "password"
          volumeMounts:
            - mountPath: /backup
              name: backup
      volumes:
        - name: backup
          hostPath:
            path: /home/toto/backup  # Directory location on the host
            type: Directory  # Optional field
      restartPolicy: Never

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Key Notes

• Volume Binding: Ensure the /backup directory is mounted to persist backup files.
• Environment Variables: Use environment variables or an --env-file to pass database credentials and other configurations.
• Cron Expressions: Use standard cron expressions or predefined schedules for recurring backups.
• Kubernetes Jobs: Use Kubernetes Job or CronJob for running backups in a Kubernetes cluster.