概念
探针方式
实例
检测探针-就绪检测
readinessProbe-httpGet
一开始pod容器中并没有index1.html，监测失败，当在容器中添加index1.html，监测成功
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| apiVersion: v1
kind: Pod
metadata:
name: readiness-httpget-pod
namespace: default
spec:
containers:
- name: readiness-httpget-container
image: hub.test.com/library/myapp:v1
imagePullPolicy: IfNotPresent
readinessProbe:
httpGet:
port: 80
path: /index1.html
initialDelaySenconds: 1
periodSenconds: 3
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initialDeplaySenconds：初始化监测延时时间，上述例子为1秒之后开始监测
periodSenconds：重试监测时间，上述例子为3秒监测一次
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| # 执行pod创建
kubectl create -f readiness-http-pod-yaml
# 查看pod状态
kubectl get pod
# 查看pod详细状态
kubectl describe pod
# 进入pod的容器中修改
kubectl exec readiness-httpget-pod -it -- /bin/sh
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监测探针-存活监测
livenessProbe-exec
一开始在容器中创建tmp文件，60s后删除，监测失败
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| apiVersion: v1
kind: Pod
metadata:
name: liveness-exec-pod
namespace: default
spec:
containers:
- name: livness-exec-container
image: busybox
imagePullPolicy: IfNotPresent
command: ['/bin/sh', '-c', 'touch /tmp/live; sleep 10;rm -rf /tmp/live; sleep 3600']
livenessProbe:
exec:
command: ['test', '-e', '/tmp/live']
initialDeplaySeconds: 1
periodSeconds: 3
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livenessProbe-httpGet
监测index.html文件是否能够get到
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| apiVersion: v1
kind: Pod
metadata:
name: liveness-httpget-pod
namespace: default
spec:
containers:
- name: liveness-httpget-container
image: hub.test.com/library/myapp:v1
imagePullPolicy: IfNotPresent
ports:
- name: http
containerPort: 80
livenessProbe:
httpGet:
port: http
path: /index.html
initialDelaySeconds: 1
periodSeconds: 3
timeoutSeconds: 10
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livenessProbe-tcpSocket
检测pod8080端口是否能通信
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| apiVersion: v1
kind: Pod
metadata:
name: liveness-tcp-pod
spec:
containers:
- name: liveness-tcp-container
image: hub.test.com/library/myapp:v1
imagePullPolicy: IfNotPresent
livenessProbe:
tcpSocket:
port: 8080
initalDelayPSeconds: 5
timeoutSeconds: 1
periodSeconds: 3
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也可以将就绪检测和存活检测写到一起