K8s-yaml的使用及命令
https://www.cnblogs.com/fuyuteng/p/9460534.html
YAML配置文件管理对象对象管理：# 创建deployment资源kubectl create -f nginx-deployment.yaml# 查看deploymentkubectl get deploy# 查看ReplicaSetkubectl get rs# 查看pods所有标签kubectl get pods --show-labels# 根据标签查看podskubectl get pods -l app=nginx# 滚动更新镜像kubectl set image deployment/nginx-deployment nginx=nginx:1.11或者kubectl edit deployment/nginx-deployment或者kubectl apply -f nginx-deployment.yaml# 实时观察发布状态：kubectl rollout status deployment/nginx-deployment# 查看deployment历史修订版本kubectl rollout history deployment/nginx-deploymentkubectl rollout history deployment/nginx-deployment --revision=3# 回滚到以前版本kubectl rollout undo deployment/nginx-deploymentkubectl rollout undo deployment/nginx-deployment --to-revision=3# 扩容deployment的Pod副本数量kubectl scale deployment nginx-deployment --replicas=10# 设置启动扩容/缩容kubectl autoscale deployment nginx-deployment --min=10 --max=15 --cpu-percent=80
对象管理实例：vim nginx.deployment.yaml
apiVersion: apps/v1beta2kind: Deploymentmetadata: name: nginx-deploymentspec: replicas: 3 selector: matchLabels: app: nginx template: metadata: labels: app: nginx spec: containers: - name: nginx image: nginx:1.10 ports: - containerPort: 80
服务发现实例：vim nging.service.yaml
apiVersion: v1kind: Servicemetadata: labels: run: nginx name: nginx namespace: defaultspec: ports: - port: 88 targetPort: 80 selector: app: nginx
清理：
# kubectl delete -f nginx-deployment.yaml
# kubectl delete -f nginx-service.yaml
POD作用：
Pod状态 创建/查询/更新/删除 重启策略 健康检查 数据持久化和共享 hostPort 问题定位
Pod管理-创建/查询/更新/删除基本管理：# 创建pod资源kubectl create -f pod.yaml# 查看podskubectl get pods pod-test# 查看pod描述kubectl describe pod pod-test# 替换资源kubectl replace -f pod.yaml -force# 删除资源kubectl delete pod pod-test
支持三种策略：
Always：当容器终止退出后，总是重启容器，默认策略。
OnFailure：当容器异常退出（退出状态码非0）时，才重启容器。
Never：当容器终止退出，从不重启容器。
Pod实例：vim pod.yaml
apiVersion: v1kind: Podmetadata: name: pod-test labels: os: centosspec: containers: - name: hello image: centos:7 env: - name: Test value: "123456" command: ["bash","-c","while true;do date;sleep 1;done"] restartPolicy: OnFailure
Pod管理-健康检查：
提供Probe机制，有以下两种类型：livenessProbe如果检查失败，将杀死容器，然后根据Pod的重启策略来决定是否重启。readinessProbe如果检查失败，Kubernetes会把Pod从服务代理的分发后端剔除。Probe支持以下三种检查方法：httpGet发送HTTP请求，返回200-400范围状态码为成功。exec执行Shell命令返回状态码是0为成功。tcpSocket发起TCP Socket建立成功。
实例：vim pod2.yaml
Pod管理-数据持久化和共享：
vim pod3.yaml
Pod端口映射：
vim pod4.yaml
apiVersion: v1kind: Podmetadata: name: nginx-pod labels: app: nginxspec: containers: - name: nginx image: nginx:1.10 ports: - name: http containerPort: 80 hostIP: 0.0.0.0 hostPort: 80 protocol: TCP - name: https containerPort: 443 hostIP: 0.0.0.0 hostPort: 443 protocol: TCP
