Mar 06 08:29:29 node3 dockerd[1731]: time="2021-03-06T08:29:29.295332147+08:00" level=info msg="scheme \"unix\" not registered, fallback to default scheme" module=grpc
Mar 06 08:29:29 node3 dockerd[1731]: time="2021-03-06T08:29:29.295345219+08:00" level=info msg="ccResolverWrapper: sending update to cc: {[{unix:///var/run/docker/containerd/containerd.sock 0  <nil>}] <nil>}" module=grpc
Mar 06 08:29:29 node3 dockerd[1731]: time="2021-03-06T08:29:29.295351440+08:00" level=info msg="ClientConn switching balancer to \"pick_first\"" module=grpc
Mar 06 08:29:29 node3 dockerd[1731]: time="2021-03-06T08:29:29.329148127+08:00" level=info msg="Loading containers: start."
Mar 06 08:29:29 node3 dockerd[1731]: time="2021-03-06T08:29:29.467573605+08:00" level=info msg="Default bridge (docker0) is assigned with an IP address 172.17.0.0/16. Daemon option --bip can be used to set a preferred IP address"
Mar 06 08:29:29 node3 dockerd[1731]: time="2021-03-06T08:29:29.514037845+08:00" level=info msg="Loading containers: done."
Mar 06 08:29:29 node3 dockerd[1731]: time="2021-03-06T08:29:29.579032840+08:00" level=info msg="Docker daemon" commit=9d988398e7 graphdriver(s)=overlay2 version=19.03.9
Mar 06 08:29:29 node3 dockerd[1731]: time="2021-03-06T08:29:29.579375770+08:00" level=info msg="Daemon has completed initialization"
Mar 06 08:29:29 node3 systemd[1]: Started Docker Application Container Engine.
Mar 06 08:29:29 node3 dockerd[1731]: time="2021-03-06T08:29:29.600055949+08:00" level=info msg="API listen on /var/run/docker.sock"

修改/etc/docker/daemon.json 为最简形式

{
  "registry-mirrors": ["https://b9pmyelo.mirror.aliyuncs.com"]
}

systemctl restart docker

systemctl enable docker