docker-compose


docker-compose mounted volume remain


I'm using docker-compose in one of my projects. During development i mount my source directory to a volume in one of my docker services for easy development. At the same time, I have a db service (psql) that mounts a named volume for persistent data storage.
I start by solution and everything is working fine
$ docker-compose up -d
When I check my volumes I see the named and "unnamed" (source volume).
$ docker volume ls
DRIVER VOLUME NAME
local 226ba7af9689c511cb5e6c06ceb36e6c26a75dd9d619360882a1012cdcd25b72
local myproject_data
The problem I experience is that, when I do
$ docker-compose down
...
$ docker volume ls
DRIVER VOLUME NAME
local 226ba7af9689c511cb5e6c06ceb36e6c26a75dd9d619360882a1012cdcd25b72
local myproject_data
both volumes remain. Every time I run
$ docker-compose down
$ docker-compose up -d
a new volume is created for my source mount
$ docker volume ls
DRIVER VOLUME NAME
local 19181286b19c0c3f5b67d7d1f0e3f237c83317816acbdf4223328fdf46046518
local 226ba7af9689c511cb5e6c06ceb36e6c26a75dd9d619360882a1012cdcd25b72
local myproject_data
I know that this will not happen on my deployment server, since it will not mount the source, but is there a way to not make the mounted source persistent?
You can use the --rm option in docker run. To use it with docker-compose you can use
docker-compose rm -v after stopping your containers with docker-compose stop
If you go through the docs about Data volumes , its mentioned that
Data volumes persist even if the container itself is deleted.
So that means, stopping a container will not remove the volumes it created, whether named or anonymous.
Now if you read further down to Removing volumes
A Docker data volume persists after a container is deleted. You can
create named or anonymous volumes. Named volumes have a specific
source form outside the container, for example awesome:/bar. Anonymous
volumes have no specific source. When the container is deleted, you
should instruct the Docker Engine daemon to clean up anonymous
volumes. To do this, use the --rm option, for example:
$ docker run --rm -v /foo -v awesome:/bar busybox top
This command creates an anonymous /foo volume. When the container is
removed, the Docker Engine removes the /foo volume but not the awesome
volume.

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