k8s练习-创建一个Deployment

创建Deployment

创建一个nginx deployment

[root@k8s-master home]# cat nginx-deployment.yaml

apiVersion: apps/v1
kind: Deployment
metadata:name: nginx-deployment
spec:selector:matchLabels:app: nginx		# 配置pod的labelsreplicas: 2		# 声明2个副本template:metadata:labels:app: nginx		# 副本的labelsspec: containers:- name: nginximage: nginxports:- containerPort: 80

[root@k8s-master home]# kubectl create -f nginx-deployment.yaml

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查看deploy

[root@k8s-master home]# kubectl get deploy
显示nginx Deployment的相关信息

[root@k8s-master home]# kubectl describe deploy nginx-deployment

Name:                   nginx-deployment
Namespace:              default
CreationTimestamp:      Mon, 01 Apr 2024 22:15:47 +0800
Labels:                 <none>
Annotations:            deployment.kubernetes.io/revision: 1
Selector:               app=nginx
Replicas:               2 desired | 2 updated | 2 total | 2 available | 0 unavailable
StrategyType:           RollingUpdate
MinReadySeconds:        0
RollingUpdateStrategy:  25% max unavailable, 25% max surge
Pod Template:Labels:  app=nginxContainers:nginx:Image:        nginxPort:         80/TCPHost Port:    0/TCPEnvironment:  <none>Mounts:       <none>Volumes:        <none>
Conditions:Type           Status  Reason----           ------  ------Available      True    MinimumReplicasAvailableProgressing    True    NewReplicaSetAvailable
OldReplicaSets:  <none>
NewReplicaSet:   nginx-deployment-7c5ddbdf54 (2/2 replicas created)
Events:Type    Reason             Age    From                   Message----    ------             ----   ----                   -------Normal  ScalingReplicaSet  4m40s  deployment-controller  Scaled up replica set nginx-deployment-7c5ddbdf54 to 2

列出该Deployment创建的Pod
查看nginx-deployment 匹配的Pod标签

 [root@k8s-master home]# kubectl get deployment nginx-deployment -o wide

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通过标签查看该Department创建的所有的Pod

 [root@k8s-master home]# kubectl get pods -l app=nginx

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展示某个Pod的相关信息
```
 kubectl describe pod <pod-name>
```

更新Deployment

修改nginx 副本数，将2 个增加到 4 个
直接修改yaml文件

apiVersion: apps/v1
kind: Deployment
metadata:name: nginx-deployment
spec:selector:matchLabels:app: nginxreplicas: 4		# 增加副本个数template:metadata:labels:app: nginxspec:containers:- name: nginximage: nginxports:- containerPort: 80

更新nginx-deployment

[root@k8s-master home]# kubectl apply -f nginx-deployment.yaml

查看Pod

[root@k8s-master home]# kubectl get pod

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使用edit更新一个Deployment

[root@k8s-master home]# kubectl edit deployment  nginx-deployment

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将副本数修改为10个并保存

查看pod
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删除Deployment
格式
kubectl delete <资源类型> <资源名称>

[root@k8s-master home]# kubectl delete deploy nginx-deployment

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扩展：

查看所有api资源，简称以及资源类型对应的api
```
 kubectl api-resources
```

[root@k8s-master home]# kubectl api-resources | grep apps
controllerrevisions                            apps/v1                                true         ControllerRevision
daemonsets                        ds           apps/v1                                true         DaemonSet
deployments                       deploy       apps/v1                                true         Deployment
replicasets                       rs           apps/v1                                true         ReplicaSet
statefulsets                      sts          apps/v1                                true         StatefulSet

[root@k8s-master home]# kubectl api-resources | grep pod
pods                              po           v1                                     true         Pod
podtemplates                                   v1                                     true         PodTemplate
horizontalpodautoscalers          hpa          autoscaling/v2                         true         HorizontalPodAutoscaler
poddisruptionbudgets              pdb          policy/v1                              true         PodDisruptionBudget

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