如何“重置” docker-compose systemd 服务？

Question

I have created a systemd service that starts a set of Docker containers using Docker-Compose, as outlined in this answer :

# /etc/systemd/system/docker-compose-app.service

[Unit]
Description=Docker Compose Application Service
Requires=docker.service
After=docker.service

[Service]
Type=oneshot
RemainAfterExit=yes
WorkingDirectory=/srv/docker
ExecStart=/usr/local/bin/docker-compose up -d
ExecStop=/usr/local/bin/docker-compose down
TimeoutStartSec=0

[Install]
WantedBy=multi-user.target

This allows me to start the Docker-Compose services using

sudo systemctl start docker-compose-app

which uses docker-compose up -d under the hood, and shutting them down using

sudo systemctl stop docker-compose-app

which uses docker-compose down . Please note that the down command is run without the -v flag, which means that volumes will remain in place, preserving the data of my containers across restarts/recreation. This is pretty much what I want in the majority of cases.

There are situations where I want to erase all data in the services, basically running the down -v command instead of just down .

Is there a way to extend the above systemd service definition to allow for an additional command (or using one of the existing systemctl commands) that would allow me to run the occasional down -v if needed. I want to do this ad-hoc if needed, not scheduled or anything like that.

How can I run

docker-compose down -v

occasionally if needed through the same systemd setup, while keeping the standard functionality of maintaining the containers' data across restarts?

Answer 1

You may try to use ExecReload definition:

ExecReload=/usr/local/bin/docker-compose down -v && /usr/local/bin/docker-compose up -d

And then you can use:

sudo systemctl reload docker-compose-app

So "reload" command will be used for "reset" in this case.