Docker daemon throwing error while starting in Linux RHEL

Question

I am trying to start my dockerd daemon by this command - dockerd & Then i start getting the error as below -

ERRO[0036] libcontainerd: failed to receive event from containerd: rpc error: code = 12 desc = unknown service types.API

This keeps rolling again and again and i am unable to start any container after that. If i close the session and open a new session, i could see docker ps is accessible. But i am unable to start any container. While starting the container I am getting error -

docker run hello-world

docker: Error response from daemon: unknown service types.API. ERRO[0000] error waiting for container: context canceled

Please let me know if any logs are needed.

Answer 1

Why do you start the docker daemon using dockerd & and not systemctl start docker.service ? This is probably the cause of your problem.

In order to start the daemon at boot, you need to run systemctl enable docker.service . See Getting Started with Containers .

Note that the kernel for Red Hat Enterprise Linux 6 only supports a limited subset of the functionality needed for container support, and I don't think anyone tests either the daemon or container images on that operating system version.