1、查看Kubernetes API所有版本
[root@linux-node1 ~]# kubectl api-versions
admissionregistration.k8s.io/v1beta1
apiextensions.k8s.io/v1beta1
apiregistration.k8s.io/v1
apiregistration.k8s.io/v1beta1
apps/v1
apps/v1beta1
apps/v1beta2
authentication.k8s.io/v1
authentication.k8s.io/v1beta1
authorization.k8s.io/v1
authorization.k8s.io/v1beta1
autoscaling/v1
autoscaling/v2beta1
batch/v1
batch/v1beta1
certificates.k8s.io/v1beta1
events.k8s.io/v1beta1
extensions/v1beta1
networking.k8s.io/v1
policy/v1beta1
rbac.authorization.k8s.io/v1
rbac.authorization.k8s.io/v1beta1
storage.k8s.io/v1
storage.k8s.io/v1beta1
v1
2、kubectl explain 来查找 kind(kubernetes对象资源类型) 对应的 API 版本信息
[root@linux-node1 ~]# kubectl explain deployment
KIND: Deployment
VERSION: extensions/v1beta1
DESCRIPTION:
DEPRECATED - This group version of Deployment is deprecated by
apps/v1beta2/Deployment. See the release notes for more information.
Deployment enables declarative updates for Pods and ReplicaSets.
FIELDS:
apiVersion <string>
APIVersion defines the versioned schema of this representation of an
object. Servers should convert recognized schemas to the latest internal
value, and may reject unrecognized values. More info:
https://git.k8s.io/community/contributors/devel/api-conventions.md#resources
kind <string>
Kind is a string value representing the REST resource this object
represents. Servers may infer this from the endpoint the client submits
requests to. Cannot be updated. In CamelCase. More info:
https://git.k8s.io/community/contributors/devel/api-conventions.md#types-kinds
metadata <Object>
Standard object metadata.
spec <Object>
Specification of the desired behavior of the Deployment.
status <Object>
Most recently observed status of the Deployment.
3、使用标签选择器列出pod
yaml文件示例：
# cat nginx-daemonset.yam
apiVersion: apps/v1
kind: DaemonSet
metadata:
name: nginx-daemonset
labels:
app: nginx
spec:
selector:
matchLabels:
app: nginx
template:
metadata:
labels:
app: nginx
spec:
containers:
- name: nginx
image: nginx:1.13.12
ports:
- containerPort: 80
nodeSelector:
nginx_yaml
[root@linux-node1 ~]# kubectl get pod -l app=nginx -o wide
NAME READY STATUS RESTARTS AGE IP NODE
nginx-daemonset-lr8rk 1/1 Running 0 1d 10.2.76.4 192.168.56.13
4、查看lable下key为app的pod标签
yaml文件示例：
# cat nginx-daemonset.yam
apiVersion: apps/v1
kind: DaemonSet
metadata:
name: nginx-daemonset
labels:
app: nginx
spec:
selector:
matchLabels:
app: nginx
template:
metadata:
labels:
app: nginx
spec:
containers:
- name: nginx
image: nginx:1.13.12
ports:
- containerPort: 80
nodeSelector:
nginx_yaml
[root@linux-node1 ~]# kubectl get pod -L app
NAME READY STATUS RESTARTS AGE APP
nginx-daemonset-lr8rk 1/1 Running 0 1d nginx
5、为node（服务器）打标签
[root@linux-node1 ~]# kubectl label nodes 192.168.56.13 nginx_yaml=true
node "192.168.56.13" labeled
6、查看node（服务器）所有标签
[root@linux-node1 ~]# kubectl get node --show-labels
NAME STATUS ROLES AGE VERSION LABELS
192.168.56.12 Ready <none> 2d v1.10.1 beta.kubernetes.io/arch=amd64,beta.kubernetes.io/os=linux,edgenode=true,kubernetes.io/hostname=192.168.56.12
192.168.56.13 Ready <none> 2d v1.10.1 beta.kubernetes.io/arch=amd64,beta.kubernetes.io/os=linux,kubernetes.io/hostname=192.168.56.13,nginx_yaml=true
7、删除node（服务器）标签
[root@linux-node1 ~]# kubectl label nodes 192.168.56.13 nginx_yaml-
node "192.168.56.13" labeled
8、查看当前命名空间
[root@linux-node1 ~]# kubectl get namespace
NAME STATUS AGE
default Active 2d
kube-public Active 2d
kube-system Active 2d
9、创建命名空间
[root@linux-node1 ~]# kubectl create namespace test-namespace
namespace "test-namespace" created
[root@linux-node1 ~]# kubectl get namespace
NAME STATUS AGE
default Active 2d
kube-public Active 2d
kube-system Active 2d
test-namespace Active 3s
10、删除命名空间
[root@linux-node1 ~]# kubectl delete namespace test-namespace
namespace "test-namespace" deleted
[root@linux-node1 ~]# kubectl get namespace
NAME STATUS AGE
default Active 2d
kube-public Active 2d
kube-system Active 2d
test-namespace Terminating 1m
[root@linux-node1 ~]# kubectl get namespace
NAME STATUS AGE
default Active 2d
kube-public Active 2d
kube-system Active 2d
11、在运行的容器中远程执行命令
[root@linux-node1 ~]# kubectl get pod
NAME READY STATUS RESTARTS AGE
nginx-daemonset-kkkb6 1/1 Running 0 19h
[root@linux-node1 ~]# kubectl exec nginx-daemonset-kkkb6 -- cat /etc/resolv.conf
nameserver 10.1.0.2
search default.svc.cluster.local. svc.cluster.local. cluster.local.
options ndots:5
12、强制删除pod 和namespace命令
# 删除 Pod
[root@linux-node1 ~]# kubectl delete pod podName(pod名称) -n NAMESPACENAME(命名空间名称) --force --grace-period=0
# 删除 Namespace
kubectl delete namespace NAMESPACENAME(命名空间名称) --force --grace-period=0
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