when I start the docker service,there’s always an error message like the last row as follow,why is it?
[root@docker1 ~]# systemctl status docker
● docker.service - Docker Application Container Engine
Loaded: loaded (/usr/lib/systemd/system/docker.service; disabled; vendor preset: disabled)
Active: active (running) since Tue 2020-04-14 11:21:09 CST; 1min 8s ago
Docs: https://docs.docker.com
Main PID: 16497 (dockerd)
Tasks: 12
Memory: 50.6M
CGroup: /system.slice/docker.service
└─16497 /usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock
Apr 14 11:21:54 docker1 dockerd[16497]: time=“2020-04-14T11:21:54.436294540+08:00” level=error msg=“error creating cluster object” error="name conflicts w…q90ptj8et2
Apr 14 11:21:54 docker1 dockerd[16497]: time=“2020-04-14T11:21:54.436384719+08:00” level=info msg="leadership changed from not yet part of a raft cluster …q90ptj8et2
Apr 14 11:21:54 docker1 dockerd[16497]: time=“2020-04-14T11:21:54.436431357+08:00” level=info msg=“dispatcher starting” module=dispatcher node.id=o7wqvcly…q90ptj8et2
Apr 14 11:21:54 docker1 dockerd[16497]: time=“2020-04-14T11:21:54.903486588+08:00” level=info msg=“worker o7wqvcly8i4axqyq90ptj8et2 was successfully regis…register”
Apr 14 11:21:54 docker1 dockerd[16497]: time=“2020-04-14T11:21:54.906125499+08:00” level=info msg="initialized VXLAN UDP port to 4789 "
Apr 14 11:21:54 docker1 dockerd[16497]: time=“2020-04-14T11:21:54.906172593+08:00” level=info msg=“Initializing Libnetwork Agent Listen-Addr=192.168.137.8… MTU=1500”
Apr 14 11:21:54 docker1 dockerd[16497]: time=“2020-04-14T11:21:54.906226809+08:00” level=info msg="New memberlist node - Node:docker1 will use memberlist … 17 213 76
Apr 14 11:21:54 docker1 dockerd[16497]: time=“2020-04-14T11:21:54.906507311+08:00” level=info msg=“Node 926fc58651a5/192.168.137.81, joined gossip cluster”
Apr 14 11:21:54 docker1 dockerd[16497]: time=“2020-04-14T11:21:54.906546946+08:00” level=info msg=“Node 926fc58651a5/192.168.137.81, added to nodes list”
Apr 14 11:21:55 docker1 dockerd[16497]: time=“2020-04-14T11:21:55.004282162+08:00” level=error msg=“error reading the kernel parameter net.ipv4.vs.expire_…directory”