Rootless docker, auto start problem.

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Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
25/100
Issue type
Bug
Clarity
Needs clarification
Activity status
Stale
Tech stack
docker, shell

Research direction

Start by reviewing /etc/systemd/system/docker-rootless.service and the docker user's .bashrc, then reproduce the reboot and run the reported docker ps command. Check whether dockerd-rootless.sh is using the same runtime socket and environment as the client; done means the rootless daemon starts automatically and docker ps connects successfully.

Written by the indexing model from the issue text.

Description

Problem:
Cannot connect to the Docker daemon at unix:///run/user/1000/docker.sock. Is the docker daemon running?

Here's what I've done and wanting a solution:

  1. Created a user 'docker' on my CentOS 7.9.
  2. Ran the curl -fsSL https://get.docker.com/rootless | sh
  3. Created /etc/systemd/system/docker-rootless.service as root with below contents:
    `[Unit]
    Description=Docker Rootless Startup
    After=network.target

[Service]
Type=simple
ExecStart=/usr/bin/su -c /home/docker/bin/dockerd-rootless.sh - docker
TimeoutStartSec=0

[Install]
WantedBy=default.target`

  1. Ran systemctl daemon-reload
  2. Last but not least, systemctl enable docker-rootless.service which created the symlink.
  3. Reboot.

However, the dockerd-rootless.sh runs, gets a PID but when running docker ps it returns:
Cannot connect to the Docker daemon at unix:///docker.sock. Is the docker daemon running?

I've tried adding:
export DOCKER_HOST=unix:///run/user/1001/docker.sock export DOCKER_HOST=unix://$XDG_RUNTIME_DIR/docker.sock

to the .bashrc of the docker user.

Any help would be greatly appreciated.
Cheers.

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