I've been using Docker on my PC to run Quantum GIS with the following instructions I've found here: docker-qgis-desktop - A simple docker container that runs QGIS desktop
Everything has been running fine until last week when I started to get this error message:
Error response from daemon: Conflict. The name "qgis-desktop-2-4" is already in use by container 235566ae17b8. You have to delete (or rename) that container to be able to reuse that name.
I'm not entirely sure what this means despite searching for clues on this site. I hadn't changed anything prior to this happening and have been successfully launching the container with this command:
sudo docker run --rm --name="qgis-desktop-2-4" -i -t -v ${HOME}:/home/${USER} -v /tmp/.X11-unix:/tmp/.X11-unix -e DISPLAY=unix$DISPLAY kartoza/qgis-desktop:latest
How can I fix this?
It looks like a container with the name qgis-desktop-2-4 already exists in the system. You can check the output of the below command to confirm if it indeed exists:
$ docker ps -a
The last column in the above command's output is for names.
If the container exists, remove it using:
$ docker rm qgis-desktop-2-4
Or forcefully using,
$ docker rm -f qgis-desktop-2-4
And then try creating a new container.
For people landing here from google like me and just want to build containers using multiple docker-compose files with one shared service:
Sometimes you have different projects that would share e.g. a database docker container. Only the first run should start the DB-Docker, the second should be detect that the DB is already running and skip this. To achieve such a behaviour we need the Dockers to lay in the same network and in the same project. Also the docker container name needs to be the same.
1st: Set the same network and container name in docker-compose
docker-compose in project 1:
version: '3'
services:
service1:
depends_on:
- postgres
# ...
networks:
- dockernet
postgres:
container_name: project_postgres
image: postgres:10-alpine
restart: always
# ...
networks:
- dockernet
networks:
dockernet:
docker-compose in project 2:
version: '3'
services:
service2:
depends_on:
- postgres
# ...
networks:
- dockernet
postgres:
container_name: project_postgres
image: postgres:10-alpine
restart: always
# ...
networks:
- dockernet
networks:
dockernet:
2nd: Set the same project using -p param or put both files in the same directory.
docker-compose -p {projectname} up
I got this error quite a lot, so now I do a batch removal of all unused containers at once:
docker container prune
add -f to force removal without prompt.
To list all unused containers (without removal):
docker container ls -a --filter status=exited --filter status=created
See here more examples how to prune other objects (networks, volumes, etc.).
No issues with the latest kartoza/qgis-desktop
I ran
docker pull kartoza/qgis-desktop
followed by
docker run -it --rm --name "qgis-desktop-2-4" -v ${HOME}:/home/${USER} -v /tmp/.X11-unix:/tmp/.X11-unix -e DISPLAY=unix$DISPLAY kartoza/qgis-desktop:latest
I did try multiple times without the conflict error - you do have to exit the app beforehand. Also, please note the parameters do differ slightly.