YAML配置文件管理對象
對象管理：
# 創建deployment資源
kubectl create-f nginx-deployment.yaml
# 查看deployment
kubectl get deploy
# 查看ReplicaSet
kubectl get rs
# 查看pods所有標簽
kubectl get pods--show-labels
# 根據標簽查看pods
kubectl get pods-l app=nginx
# 滾動更新鏡像
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
# 實時觀察發布狀態：
kubectl rollout status deployment/nginx-deployment
# 查看deployment歷史修訂版本
kubectl rollout history deployment/nginx-deployment
kubectl rollout history deployment/nginx-deployment --revision=3# 回滾到以前版本
kubectl rollout undo deployment/nginx-deployment
kubectl rollout undo deployment/nginx-deployment --to-revision=3# 擴容deployment的Pod副本數量
kubectl scale deployment nginx-deployment --replicas=10# 設置啟動擴容/縮容
kubectl autoscale deployment nginx-deployment --min=10 --max=15 --cpu-percent=80
對象管理實例：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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服務發現實例：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狀態 ? 創建/查詢/更新/刪除 ? 重啟策略 ? 健康檢查 ? 數據持久化和共享 ? hostPort ? 問題定位
Pod管理-創建/查詢/更新/刪除
基本管理：
# 創建pod資源
kubectl create-f pod.yaml
# 查看pods
kubectl get pods pod-test
# 查看pod描述
kubectl describe pod pod-test
# 替換資源
kubectl replace-f pod.yaml -force
# 刪除資源
kubectl delete pod pod-test
支持三種策略：
Always：當容器終止退出后，總是重啟容器，默認策略。
OnFailure：當容器異常退出(退出狀態碼非0)時，才重啟容器。
Never：當容器終止退出，從不重啟容器。
Pod實例：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-健康檢查：
提供Probe機制，有以下兩種類型：
livenessProbe
如果檢查失敗，將殺死容器，然后根據Pod的重啟策略來決定是否
重啟。
readinessProbe
如果檢查失敗，Kubernetes會把Pod從服務代理的分發后端剔除。
Probe支持以下三種檢查方法：
httpGet
發送HTTP請求，返回200-400范圍狀態碼為成功。
exec
執行Shell命令返回狀態碼是0為成功。
tcpSocket
發起TCP Socket建立成功。
實例：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-數據持久化和共享：
vim pod3.yaml
apiVersion: v1
kind: Pod
metadata:
name: pod-test1
labels:
test: centos
spec:
containers:
# 第一個容器- name: hello-writeimage: centos:7command: ["bash","-c","for i in {1..1000};do echo $i >> /data/hello;sleep 1;done"]
# 第二個容器- 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
# 數據卷
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
