root@ubuntu:/home/ubuntu# ps -elf | grep control 4 S root 34534 34463 1 80 0 - 53539 futex_ 09:02 ? 00:00:20 kube-controller-manager --allocate-node-cidrs=true --authentication-kubeconfig=/etc/kubernetes/controller-manager.conf --authorization-kubeconfig=/etc/kubernetes/controller-manager.conf --bind-address=127.0.0.1 --client-ca-file=/etc/kubernetes/pki/ca.crt --cluster-cidr=10.244.0.0/16 --cluster-name=kubernetes --cluster-signing-cert-file=/etc/kubernetes/pki/ca.crt --cluster-signing-key-file=/etc/kubernetes/pki/ca.key --controllers=*,bootstrapsigner,tokencleaner --kubeconfig=/etc/kubernetes/controller-manager.conf --leader-elect=true --node-cidr-mask-size=24 --requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.crt --root-ca-file=/etc/kubernetes/pki/ca.crt --service-account-private-key-file=/etc/kubernetes/pki/sa.key --service-cluster-ip-range=10.96.0.0/12 --use-service-account-credentials=true 0 S root 41096 38101 0 80 0 - 1097 pipe_w 09:23 pts/2 00:00:00 grep --color=auto control root@ubuntu:/home/ubuntu# docker ps -a | grep controller | less 2a76eac2d768 0db9714b83c0 "kube-controller-man…" 20 minutes ago Up 20 minutes k8s_kube-controller-manager_kube-controller-manager-ubuntu_kube-system_cb87ef4dc335417d42d752668aa1eb27_0 07309a3816f0 k8s.gcr.io/pause:3.2 "/pause" 20 minutes ago Up 20 minutes k8s_POD_kube-controller-manager-ubuntu_kube-system_cb87ef4dc335417d42d752668aa1eb27_0 root@ubuntu:/home/ubuntu# docker logs 2a76eac2d768 | more
root@ubuntu:/home/ubuntu# docker image ls | grep controll mirrorgcrio/kube-controller-manager-arm64 v1.18.1 0db9714b83c0 6 months ago 158MB k8s.gcr.io/kube-controller-manager v1.18.1 0db9714b83c0 6 months ago 158MB root@ubuntu:/home/ubuntu#
root@ubuntu:~# docker images | grep controller mirrorgcrio/kube-controller-manager-arm64 v1.18.1 0db9714b83c0 6 months ago 158MB k8s.gcr.io/kube-controller-manager v1.18.1 0db9714b83c0 6 months ago 158MB
docker tag 详解
docker tag 用于给镜像打标签，语法如下：
docker tag SOURCE_IMAGE[:TAG] TARGET_IMAGE[:TAG]
① 比如我现在有一个 centos 镜像：
[root@localhost ~]$ docker images REPOSITORY TAG IMAGE ID CREATED SIZE centos latest 1e1148e4cc2c 2 weeks ago 202MB
② 我对 centos 进行开发，开发了第一个版本，我就可以对这个版本打标签，打完标签后会生成新的镜像：
[root@localhost ~]$ docker tag centos centos:v1
[root@localhost ~]$ docker images REPOSITORY TAG IMAGE ID CREATED SIZE centos latest 1e1148e4cc2c 2 weeks ago 202MB centos v1 1e1148e4cc2c 2 weeks ago 202MB
③ 我继续对 centos 进行开发，开发了第二个版本，继续打标签：
[root@localhost ~]$ docker tag centos centos:v2
[root@localhost ~]$ docker images REPOSITORY TAG IMAGE ID CREATED SIZE centos latest 1e1148e4cc2c 2 weeks ago 202MB centos v1 1e1148e4cc2c 2 weeks ago 202MB centos v2 1e1148e4cc2c 2 weeks ago 202MB
④ 以此类推，每开发一个版本打一个标签，如果以后我想回滚版本，就可以使用指定标签的镜像来创建容器：
[root@localhost ~]$ docker run -itd centos:v1