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deployment

kubectl get deploy

# 查看ReplicaSet

kubectl get rs

# 查看pods所有标签

kubectl get pods--show-labels

# 根据标签查看pods

kubectl 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-deployment

kubectl rollout history deployment/nginx-deployment --revision=3# 回滚到以前版本

kubectl rollout undo deployment/nginx-deployment

kubectl 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/v1beta2

kind: Deployment

metadata:

name: nginx-deployment

spec:

replicas:3selector:

matchLabels:

app: nginx

template:

metadata:

labels:

app: nginx

spec:

containers:-name: nginx

image: nginx:1.10ports:- containerPort: 80

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服务发现实例：vim nging.service.yaml

apiVersion: v1

kind: Service

metadata:

labels:

run: nginx

name: nginx

namespace: default

spec:

ports:- port: 88targetPort:80selector:

app: nginx

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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pods

kubectl 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: v1

kind: Pod

metadata:

name: pod-test

labels:

os: centos

spec:

containers:-name: hello

image: centos:7

env:-name: Test

value:"123456"command: ["bash","-c","while true;do date;sleep 1;done"]

restartPolicy: OnFailure

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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

apiVersion: v1

kind: Pod

metadata:

name: nginx-pod

labels:

app: nginx

spec:

containers:-name: nginx

image: nginx:1.10ports:- containerPort: 80livenessProbe:

httpGet:

path:/index.html

port:80

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Pod管理-数据持久化和共享：

vim pod3.yaml

apiVersion: v1

kind: Pod

metadata:

name: pod-test1

labels:

test: centos

spec:

containers:

# 第一个容器- name: hello-writeimage: centos:7command: ["bash","-c","for i in {1..1000};do echo $i >> /data/hello;sleep 1;done"]

# 第二个容器- name: hello-read

image: centos:7command: ["bash","-c","for i in {1..1000};do cat $i >> /data/hello;sleep 1;done"]

volumeMounts:-name: data

mountPath:/data

# 数据卷

volumes:-name: data

hostPath:

path:/data

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Pod端口映射：

vim pod4.yaml

apiVersion: v1

kind: Pod

metadata:

name: nginx-pod

labels:

app: nginx

spec:

containers:-name: nginx

image: nginx:1.10ports:-name: http

containerPort:80hostIP:0.0.0.0hostPort:80protocol: TCP-name: https

containerPort:443hostIP:0.0.0.0hostPort:443protocol: TCP