softonic/docker-system-prune repository overview

⁠Docker System Prune

Executes the docker system prune command to allow automatize its execution.

⁠Usage

This image allows you to program automatically when a prune will be done in your hosts.

The main advantage over external solutions like a cron job is that you can launch it in a cluster easily: "fire & forget"

For example in a Swarm mode cluster:

docker \
  service create --name docker-system-prune \
    --mount type=bind,src=/var/run/docker.sock,dst=/var/run/docker.sock \
    --mode global \
    --restart-delay 86400s \
    --restart-max-attempts 3650 \
    softonic/docker-system-prune 

This launches the "prune" command in all the nodes in the cluster once a day, more or less, during 10 years.

By default it launches the service with the parameters --force and --all, but you can change these if you like just adding then when defining the service. For example:

 docker \
   service create --name docker-system-prune \
     --mount type=bind,src=/var/run/docker.sock,dst=/var/run/docker.sock \
     --mode global \
     --restart-delay 86400s \
     --restart-max-attempts 3650 \
     softonic/docker-system-prune \
     --volumes --all

!!! info You need to mount the docker socket to allow the command to be executed in the host.

⁠Requirements

As it executes the docker system prune command this can work only in nodes with Docker versions >=1.13