Kubectl Commands
常用 Kubectl 命令
创建命名空间
新建一个名为 nc-namespace.yaml 的 YAML 文件
apiVersion: v1
kind: Namespace
metadata:
name: nc-namespace
然后运行以下命令创建命名空间
$ kubectl create -f nc-namespace.yaml
namespace/nc-namespace created
创建命名空间资源配额文件
新建一个名为 nc-quota.yaml 的 YAML 文件
apiVersion: v1
kind: ResourceQuota
metadata:
name: nc-quota
namespace: nc-namespace
spec:
hard:
pods: "10"
requests.cpu: "2"
requests.memory: 2Gi
limits.cpu: "4"
limits.memory: 4Gi
然后运行以下命令创建资源配额
$ kubectl create -f nc-quota.yaml
resourcequota/nc-quota created
创建 PV 卷和 PVC
新建一个名为 nc-pv.yaml 的 YAML 文件
apiVersion: v1
kind: PersistentVolume
metadata:
name: nc-pv-volume
namespace: nc-namespace
spec:
storageClassName: manual
capacity:
storage: 5Gi
accessModes:
- ReadWriteOnce
hostPath:
path: "/mnt/data"
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
name: nc-pv-claim
namespace: nc-namespace
spec:
storageClassName: manual
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 5Gi
然后运行以下命令创建卷
$ kubectl apply -f nc-pv.yaml
persistentvolume/nc-pv-volume created
persistentvolumeclaim/nc-pv-claim created
创建部署脚本
新建一个名为 nc-deployment-mysql.yaml 的 YAML 文件
apiVersion: v1
kind: Service
metadata:
name: mysql
namespace: nc-namespace
spec:
ports:
- port: 3306
selector:
app: mysql
clusterIP: None
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: mysql
namespace: nc-namespace
spec:
selector:
matchLabels:
app: mysql
strategy:
type: Recreate
template:
metadata:
labels:
app: mysql
spec:
containers:
- image: mysql:8.0.21
name: mysql
env:
- name: MYSQL_ROOT_PASSWORD
value: password
ports:
- containerPort: 3306
name: mysql
volumeMounts:
- name: mysql-persistent-storage
mountPath: /var/lib/mysql
volumes:
- name: mysql-persistent-storage
persistentVolumeClaim:
claimName: nc-pv-claim
然后运行一下命令部署
$ kubectl apply -f nc-deployment-mysql.yaml
service/mysql created
deployment.apps/mysql created
其他
列出集群中的所有命名空间
$ kubectl get namespaces --show-labels
删除 deployment
$ kubectl delete deployment mysql -n nc-namespace
删除 pod
$ kubectl delete pod mysql -n nc-namespace
删除 service
$ kubectl delete svc mysql -n nc-namespace
删除 PV 卷
$ kubectl delete pvc nc-pv-claim -n nc-namespace
$ kubectl delete pv nc-pv-volume -n nc-namespace
删除命名空间
$ kubectl delete -f nc-namespace.yaml