CODEWITHSUNDEEP
dockerdocker-compose
bagsmode
bagsmode

Reputation: 685

Is there a way to automatically backup your database when issuing docker down command

Tried to search the Docker documentation, however, I cannot find anything that directly relates to a backup on the down command. Additionally, I see you can add your own command script in the yml on up, so I was hoping that there might be something similar for down?

Upvotes: 0

Views: 249

Answers (1)

jordanvrtanoski
jordanvrtanoski

Reputation: 5557

You need to make your own entrypoint script that will create an exit hook. You can see more details on the steps of building custom image with a custom entrypoint in this SO.

In your case, the entrypoint will look like this:

#!/bin/bash
set -e

execute_on_finish() {
    echo "Execute on finish" 
}

trap execute_on_finish EXIT

echo "CALLING ENTRYPOINT WITH CMD: $@"
exec /old_entrypoint.sh "$@" &
daemon_pid=$!
wait $daemon_pid
execute_on_finish

Note

Since the backup process is a long operation, and docker will execute a kill if the process doesn't shut-down in 10s, you will need to send option to the stop not to kill the container with -t. See more details here

Upvotes: 1

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