Score:2

Installing docker compose v2 via docker-compose-plugin

mq flag

I have installed docker-ce, docker-compose and the docker-compose-plugin package on Ubuntu 22.04 from the Docker apt repository, following the official instructions, but when I type docker compose on the command line all I get is this:

docker: 'compose' is not a docker command.
See 'docker --help'

According to docker plugin ls, no plugin has been installed. Any clues?

Some additional information:

  • bash-completion does suggests compose as a possible subcommand
  • There is a working docker-compose executable in /usr/libexec/docker/cli-plugins/
  • The output of dpkg -l | grep docker is as follows:
    ii  docker-buildx-plugin                                        0.10.2-1~ubuntu.22.04~jammy                                    amd64        Docker Buildx cli plugin.
    ii  docker-ce                                                   5:23.0.1-1~ubuntu.22.04~jammy                                  amd64        Docker: the open-source application container engine
    ii  docker-ce-cli                                               5:23.0.1-1~ubuntu.22.04~jammy                                  amd64        Docker CLI: the open-source application container engine
    ii  docker-ce-rootless-extras                                   5:23.0.1-1~ubuntu.22.04~jammy                                  amd64        Rootless support for Docker.
    ii  docker-compose-plugin                                       2.16.0-1~ubuntu.22.04~jammy                                    amd64        Docker Compose (V2) plugin for the Docker CLI.
    ii  docker-scan-plugin                                          0.23.0~ubuntu-jammy                                            amd64        Docker scan cli plugin.
dummyuser avatar
uy flag
Hi Aldo, 1) please edit your question and add the result of `dpkg -l | grep docker` 2) how did you install docker itself ?
Aldo avatar
mq flag
Hi @dummyuser, thank you for answering. I installed docker via apt from the repository https://download.docker.com/linux/ubuntu following the instruction on the webpage mentioned above.
Artur Meinild avatar
vn flag
Please add output of `docker info`, `docker version` and `snap list` ..
Aldo avatar
mq flag
Thank you @ArturMeinild, you pointed me in the right direction! In the output of `docker info` there was the line ``` WARNING: Plugin "/home/aldo/.docker/cli-plugins/docker-compose" is not valid: failed to fetch metadata: fork/exec /home/aldo/.docker/cli-plugins/docker-compose: permission denied ``` For some reason that file was a text file with only "Not Found" in it. After I got rid of it `docker compose` started working, and the output of `docker info` now points to the plugins in `/usr/libexec/docker/cli-plugins/`
Artur Meinild avatar
vn flag
That's good to hear. Please post your findings as an answer, as it might help others. Thanks!
Score:2
mq flag

Examination of the output of docker info led me to the solution to the problem. It did indeed contain the line:

WARNING: Plugin "/home/aldo/.docker/cli-plugins/docker-compose" is not valid: failed to fetch metadata: fork/exec /home/aldo/.docker/cli-plugins/docker-compose: permission denied

I'm not sure what might have created it, but in the directory ~/.docker/cli-plugins/ there was a docker-compose text file, only containing the words "Not Found". Simply deleting it solved my problem, and now docker finds the default path to the plugin executable /usr/libexec/docker/cli-plugins/docker-compose.

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