ErrImagePull: rpc error: code = Unknown desc = Error response from daemon: Get https://172.21.203.15/v2/: x509: certificate signed by unknown authority
修改配置文件， 增加 --insecure-registry=172.16.1.99 选项
[root@master01 docker]# cat vim /usr/lib/systemd/system/docker.service[Unit]
Description=Docker Application Container Engine
Documentation=http://docs.docker.io
[Service]
Environment="PATH=/opt/kube/bin:/bin:/sbin:/usr/bin:/usr/sbin"
ExecStart=/opt/kube/bin/dockerd --insecure-registry=172.16.1.99
ExecStartPost=/sbin/iptables -I FORWARD -s 0.0.0.0/0 -j ACCEPT
ExecReload=/bin/kill -s HUP $MAINPID
Restart=on-failure
RestartSec=5
LimitNOFILE=infinity
LimitNPROC=infinity
LimitCORE=infinity
Delegate=yes
KillMode=process
[Install]
WantedBy=multi-user.target
重新启动服务
systemctl daemon-reload
systemctl restart docker
