log-cleaner

Features

• A standalone docker container.
• Designed to clear the log files for a docker container at specified intervals.
• Can be used for clearing logs in multiple containers.
• Only functional with the driver: "json-file".

Startup commands

sudo docker-compose up -d

force recreate and show logs

sudo docker-compose up -d --build --force-recreate && sudo docker-compose logs -f

Environment variables

• CLEAN_FREQUENCY - an integer and represents seconds so 60 = 1 minute, 3600 = 1 hour
• CONTAINERS_T0_CLEAN - the container_name of the containers to have their logs cleaned.
• INCLUDE_SELF - whether the current container (log-cleaner by default) should also have it’s logs cleaned, defaults to TRUE
• SELF_NAME - name of the current container (defaults to log_cleaner)

Examples

The following docker-compose.yml example will clear the logs of containers with names mongo nginx
every 3600 seconds (hourly)

version: '2'
services:
  log-cleaner:
    image: smoloney/docker-log-cleaner:latest
    build:
      context: .
      dockerfile: Dockerfile
    container_name: log-cleaner
    restart: unless-stopped
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
      - /var/lib/docker/containers/:/var/lib/docker/containers/
    environment:
      - CLEAN_FREQUENCY=3600
      - CONTAINERS_T0_CLEAN=mongo nginx
      - INCLUDE_SELF=FALSE
    logging:
      driver: "json-file"
      options:
        max-size: "1m"
        max-file: "1"

The following docker-compose.yml example will clear the logs of containers with names mongo nginx log-cleaner
every 3600 seconds (hourly)

version: '2'
services:
  log-cleaner:
    image: smoloney/docker-log-cleaner:latest
    build:
      context: .
      dockerfile: Dockerfile
    container_name: log-cleaner
    restart: unless-stopped
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
      - /var/lib/docker/containers/:/var/lib/docker/containers/
    environment:
      - CLEAN_FREQUENCY=3600
      - CONTAINERS_T0_CLEAN=mongo nginx
      - INCLUDE_SELF=TRUE
    logging:
      driver: "json-file"
      options:
        max-size: "1m"
        max-file: "1"

The following docker-compose.yml example will clear the logs of containers with names mongo nginx my-logger-cleaner
every 3600 seconds (hourly)

version: '2'
services:
  log-cleaner:
    image: smoloney/docker-log-cleaner:latest
    build:
      context: .
      dockerfile: Dockerfile
    container_name: my-logger-cleaner
    restart: unless-stopped
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
      - /var/lib/docker/containers/:/var/lib/docker/containers/
    environment:
    - CLEAN_FREQUENCY=3600
    - CONTAINERS_T0_CLEAN=mongo nginx
    - INCLUDE_SELF=TRUE
    - SELF_NAME=my-logger-cleaner
    logging:
      driver: "json-file"
      options:
        max-size: "1m"
        max-file: "1"

Notes

• This project is not designed as a replacement for the docker-compose logging directives
  but rather as an adjunct to the logging directive.
• If this feature is implemented in docker then this project will become defunct and hopefully this will be the case. There
  was an issue about this in docker/compose in github.

Acknowledgement

• This project uses the s6 process supervisor

Licence

MIT Licence