get信息
获取所有名称空间信息
# kubectl get namespace
NAME STATUS AGE
default Active 2d2h
kube-node-lease Active 2d2h
kube-public Active 2d2h
kube-system Active 2d2h1、获取node信息
# kubectl get node
NAME STATUS ROLES AGE VERSION
k8s-master Ready master 42h v1.15.10
k8s-node01 Ready <none> 42h v1.15.10
k8s-node02 Ready <none> 42h v1.15.102、获取pod信息
# 默认获取的是default名称空间的pod信息,-n可以指定名称空间
# kubectl get pods
NAME READY STATUS RESTARTS AGE
myapp 1/1 Running 0 133m
myapp-deploy-856957f86c-7dz49 1/1 Running 0 119s
myapp-deploy-856957f86c-8lp96 1/1 Running 0 125m
myapp-deploy-856957f86c-dr5hg 1/1 Running 0 119s
myapp-deploy-856957f86c-n695d 1/1 Running 0 119s
myapp-deploy-856957f86c-sv86x 1/1 Running 0 125m
nginx 1/1 Running 0 3h15m
zhongduan 1/1 Running 0 156m
# kubectl get pods -n kube-system
NAME READY STATUS RESTARTS AGE
coredns-94c4b98b-8lsjx 1/1 Running 0 2d1h
coredns-94c4b98b-bgrsk 1/1 Running 0 2d1h
etcd-k8s-master 1/1 Running 0 2d2h
kube-apiserver-k8s-master 1/1 Running 0 2d2h
kube-controller-manager-k8s-master 1/1 Running 0 2d2h
kube-flannel-ds-amd64-66m4b 1/1 Running 0 2d1h
kube-flannel-ds-amd64-gbbnm 1/1 Running 0 2d1h
kube-flannel-ds-amd64-j2gc5 1/1 Running 0 2d1h
kube-proxy-98ttd 1/1 Running 0 2d2h
kube-proxy-qwnxv 1/1 Running 0 2d2h
kube-proxy-t5zbn 1/1 Running 0 2d2h
kube-scheduler-k8s-master 1/1 Running 0 2d2h
获取service信息
# kubectl get service
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 2d2h
myapp-deploy ClusterIP 10.97.206.58 <none> 80/TCP 129m
nginx ClusterIP 10.105.36.97 <none> 80/TCP 3h9m
# kubectl get service -o wide
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE SELECTOR
kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 2d2h <none>
myapp-deploy ClusterIP 10.97.206.58 <none> 80/TCP 129m app=myapp-deploy
nginx ClusterIP 10.105.36.97 <none> 80/TCP 3h9m run=nginx获取控制器信息
# kubectl get deployment
NAME READY UP-TO-DATE AVAILABLE AGE
myapp-deploy 5/5 5 5 131m
# kubectl get deployment -o wide
NAME READY UP-TO-DATE AVAILABLE AGE CONTAINERS IMAGES SELECTOR
myapp-deploy 5/5 5 5 131m myapp ikubernetes/myapp:v1 app=myapp-deployscale 动态扩容、宿容
# kubectl get deployment
NAME READY UP-TO-DATE AVAILABLE AGE
myapp-deploy 5/5 5 5 135m
# kubectl get deployment myapp-deploy
NAME READY UP-TO-DATE AVAILABLE AGE
myapp-deploy 5/5 5 5 135m
# kubectl scale --replicas=3 deployment myapp-deploy
deployment.extensions/myapp-deploy scaled
# kubectl get deployment myapp-deploy
NAME READY UP-TO-DATE AVAILABLE AGE
myapp-deploy 3/3 3 3 136mlabels 容器标签操作命令
查看容器标签
标签选择器：
等值关系：=、==、!=
集合关系：
KEY in (VALUE1、VALUE2、...) #包含标签值得pod
KEY notin (VALUE1、VALUE2、...) #不包含标签值得pod
#查看run标签对应值的pod，这里会把所有的pod都显示，
# kubectl get pods -L run
NAME READY STATUS RESTARTS AGE "RUN"
myapp 1/1 Running 0 15d "myapp"
myapp-deploy-856957f86c-8lp96 1/1 Running 0 15d
myapp-deploy-856957f86c-dr5hg 1/1 Running 0 15d
myapp-deploy-856957f86c-sv86x 1/1 Running 0 15d
myapp-dome 1/1 Running 0 14d
nginx 1/1 Running 0 15d "nginx"
zhongduan 1/1 Running 0 15d "zhongduan"只显示标签为run的的pod
# kubectl get pods -l run --show-labels
NAME READY STATUS RESTARTS AGE LABELS
myapp 1/1 Running 0 15d "run=myapp"
nginx 1/1 Running 0 15d "run=nginx"
zhongduan 1/1 Running 0 15d "run=zhongduan"
in和notin
# kubectl get pods -l "run in (myapp,nginx)" --show-labels
NAME READY STATUS RESTARTS AGE LABELS
myapp 1/1 Running 0 15d run=myapp
nginx 1/1 Running 0 15d run=nginx
# kubectl get pods -l "run notin (myapp,nginx)" --show-labels
NAME READY STATUS RESTARTS AGE LABELS
myapp-deploy-856957f86c-8lp96 1/1 Running 0 15d app=myapp-deploy,pod-template-hash=856957f86c
myapp-deploy-856957f86c-dr5hg 1/1 Running 0 15d app=myapp-deploy,pod-template-hash=856957f86c
myapp-deploy-856957f86c-sv86x 1/1 Running 0 15d app=myapp-deploy,pod-template-hash=856957f86c
myapp-dome 1/1 Running 0 14d apps=myapp,tier=qianduan
zhongduan 1/1 Running 0 15d run=zhongduan给pod添加新的标签
# kubectl label pod <podname> <labelname=VAULE>
例如：
# kubectl label pod nginx relese=1.15.0