Hi. I am new in docker.
I ran several docker containers in my CentOS7.
Do not know exactly when or what causes this problem but recently an error came so frequently.
message is …
docker: Error response from daemon: devmapper: Error activating devmapper device for '8e75eece604e1a61993e356c63ef4fc5674d7bd8ac37369787cd6895cbb09801-init': devicemapper: Can't set cookie dm_task_set_cookie failed.
I found an article to solve this problem. It says follow command will fix this and looks fine.
echo 'y' | sudo dmsetup udevcomplete_all
However, after this command I am not sure but it could be a cause of following error
rpc error: code = 2 desc = oci runtime error: exec failed: container_linux.go:262: starting container process caused "process_linux.go:73: starting setns process caused \"fork/exec /proc/self/exe: no such file or directory\""
So eventually, I have to restart docker service. To fix this, I would like to know what causes this problems.