概述
readinessProbe主要探测服务是否就绪,如果你的应用的readinessProbe运行失败,那么就会从组成service的端点中删除,这样就不会有流量通过Kubernetes服务发现机制来发送给它
livenessProbe探测服务是否可,不可用时重启pod
参数
- initialDelaySeconds:容器启动后,第一次执行探测需要等待多少秒
- periodSeconds:执行探测的频率,默认是10秒,最小1秒
- timeoutSeconds:探测超时时间,告诉Kubernetes应该为健康检查等待多长时间,默认1秒,最小1秒
官方文档: https://kubernetes.io/docs/ta...
支持的类型
http 请求
spec:
containers:
- name: liveness
args:
- /server
image: gcr.io/google_containers/liveness
readinessProbe:
httpGet:
path: /healthz
port: 8080
httpHeaders:
- name: X-Custom-Header
value: Awesome
initialDelaySeconds: 20
periodSeconds: 10
timeouteSeconds: 1
livenessProbe:
httpGet:
path: /healthz
port: 8080
httpHeaders:
- name: X-Custom-Header
value: Awesome
initialDelaySeconds: 20
periodSeconds: 10
timeouteSeconds: 1
tcp 端口
spec:
containers:
- name: goproxy
image: gcr.io/google_containers/goproxy:0.1
ports:
- containerPort: 8080
readinessProbe:
tcpSocket:
port: 8080
initialDelaySeconds: 20
periodSeconds: 10
timeoutSeconds: 1
livenessProbe:
tcpSocket:
port: 8080
initialDelaySeconds: 20
periodSeconds: 10
timeoutSeconds: 1
sh命令或shell脚本
spec:
containers:
- name: liveness
args:
- /bin/sh
- -c
- touch /tmp/healthy; sleep 30; rm -rf /tmp/healthy; sleep 600
image: gcr.io/google_containers/busybox
livenessProbe:
exec:
command:
- cat
- /tmp/healthy
initialDelaySeconds: 5
periodSeconds: 5