Kubernetes label简单使用

# 查看集群中的node节点

# kubectl get nodes

NAME       STATUS    ROLES     AGE       VERSION

server01   Ready     <none>    130d      v1.9.2

server02   Ready     <none>    130d      v1.9.2

server03   Ready     <none>    130d      v1.9.2

# 查看server02的具体信息

# kubectl describe node server02

Name:               server02

Roles:              <none>

Labels:             beta.kubernetes.io/arch=amd64

                    beta.kubernetes.io/os=linux

                    kubernetes.io/hostname=server02

# 为server02添加label：xx=yy

# kubectl label nodes server02 xx=yy

node "server02" labeled

# 此时server02已有xx=yy的label

# kubectl describe node server02

Name:               server02

Roles:              <none>

Labels:             beta.kubernetes.io/arch=amd64

                    beta.kubernetes.io/os=linux

                    kubernetes.io/hostname=server02

                    xx=yy

# 获取label为xx=yy的node，可以查到server02

# kubectl get node -a -l "xx=yy"

NAME       STATUS    ROLES     AGE       VERSION

server02   Ready     <none>    130d      v1.9.2

# 修改xx=yy为xx=zz

# kubectl label --overwrite nodes server02 xx=zz

node "server02" labeled

# kubectl describe node server02

Name:               server02

Roles:              <none>

Labels:             beta.kubernetes.io/arch=amd64

                    beta.kubernetes.io/os=linux

                    kubernetes.io/hostname=server02

                    xx=zz

# 删除server02上的xx标签

# kubectl label nodes server02 xx-

node "server02" labeled

# 查找xx=zz的节点，已经显示没有

# kubectl get node -a -l "xx=zz"

No resources found.