示例：livenessProbe和HTTPGetAction:
[root@localhost7C ~]#cat nginx-http.yml
apiVersion: apps/v1
kind: Deployment
metadata:
name: nginx-deployment
labels:
app: nginx
spec:
replicas: 1
selector:
matchLabels:
app: nginx-linux39
template:
metadata:
labels:
app: nginx-linux39
spec:
containers:
- name: nginx
image: harbor.linux39.com/baseimages/nginx:1.14.2
ports:
- containerPort: 80
livenessProbe:
httpGet:
#path: /monitor/monitor.html
path: /index.html
port: 80
initialDelaySeconds: 5
periodSeconds: 3
timeoutSeconds: 5
successThreshold: 1
failureThreshold: 3
#readinessProbe: #探针类型
# httpGet: #探针方式
# #path: /monitor/monitor.html #测试地址
# path: /index.html
# port: 80
# initialDelaySeconds: 5 #参数
# periodSeconds: 3
# timeoutSeconds: 5
# successThreshold: 1
# failureThreshold: 3
---
kind: Service
apiVersion: v1
metadata:
labels:
app: magedu-nginx-service-label
name: magedu-nginx-service
namespace: default
spec:
type: NodePort
ports:
- name: http
port: 80
protocol: TCP
targetPort: 80
nodePort: 30004
selector:
app: nginx-linux39
#说明重启过多次。目前状态为CrashLoopBackOff
[root@localhost7C ~]# kubectl get pod -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
nginx-deployment-67c7cf88-m5nqt 0/1 CrashLoopBackOff 4 2m24s 10.10.3.54 localhost7f.localdomain <none> <none>
示例：readinessProbe和HTTPGetAction:
apiVersion: apps/v1
kind: Deployment
metadata:
name: nginx-deployment
labels:
app: nginx
spec:
replicas: 1
selector:
matchLabels:
app: nginx-linux39
template:
metadata:
labels:
app: nginx-linux39
spec:
containers:
- name: nginx
image: harbor.linux39.com/baseimages/nginx:1.14.2
ports:
- containerPort: 80
readinessProbe:
httpGet:
#path: /monitor/monitor.html #测试
path: /index.html
port: 80
initialDelaySeconds: 5
periodSeconds: 3
timeoutSeconds: 5
successThreshold: 1
failureThreshold: 3
#livenessProbe:
# httpGet:
# #path: /monitor/monitor.html
# path: /index.html
# port: 80
# initialDelaySeconds: 5
# periodSeconds: 3
# timeoutSeconds: 5
# successThreshold: 1
# failureThreshold: 3
---
kind: Service
apiVersion: v1
metadata:
labels:
app: magedu-nginx-service-label
name: magedu-nginx-service
namespace: default
spec:
type: NodePort
ports:
- name: http
port: 80
protocol: TCP
targetPort: 80
nodePort: 30004
selector:
app: nginx-linux39
#容器正常
[root@localhost7C ~]# kubectl get pod -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
nginx-deployment-6b9856b557-cnsvd 0/1 Running 0 3m12s 10.10.3.55 localhost7f.localdomain <none> <none>
#Endpoints:删除
[root@localhost7C ~]# kubectl describe services -n default magedu-nginx-service
Name: magedu-nginx-service
Namespace: default
Labels: app=magedu-nginx-service-label
Annotations: kubectl.kubernetes.io/last-applied-configuration:
{"apiVersion":"v1","kind":"Service","metadata":{"annotations":{},"labels":{"app":"magedu-nginx-service-label"},"name":"magedu-nginx-servic...
Selector: app=nginx-linux39
Type: NodePort
IP: 10.20.101.71
Port: http 80/TCP
TargetPort: 80/TCP
NodePort: http 30004/TCP
Endpoints:
Session Affinity: None
External Traffic Policy: Cluster
Events: <none>
#显示错误
[root@localhost7C ~]# kubectl describe pod nginx-deployment-6b9856b557-cnsvd
...
...
Warning Unhealthy 57s (x48 over 3m18s) kubelet, localhost7f.localdomain Readiness probe failed: HTTP probe failed with statuscode: 404
#TCPSocketAction处理方式，结果一样。
[root@localhost7C case5]# cat nginx-tcp.yml
apiVersion: apps/v1
kind: Deployment
metadata:
name: nginx-deployment
labels:
app: nginx
spec:
replicas: 1
selector:
matchLabels:
app: nginx-linux39
template:
metadata:
labels:
app: nginx-linux39
spec:
containers:
- name: nginx
image: harbor.linux39.com/baseimages/nginx:1.14.2
ports:
- containerPort: 80
livenessProbe:
tcpSocket: #tcp方式
port: 80
#port: 8080
initialDelaySeconds: 5
periodSeconds: 3
timeoutSeconds: 5
successThreshold: 1
failureThreshold: 3
readinessProbe:
tcpSocket: #tcp方式
port: 80
#port: 8080
initialDelaySeconds: 5
periodSeconds: 3
timeoutSeconds: 5
successThreshold: 1
failureThreshold: 3
---
kind: Service
apiVersion: v1
metadata:
labels:
app: magedu-nginx-service-label
name: magedu-nginx-service
namespace: default
spec:
type: NodePort
ports:
- name: http
port: 80
protocol: TCP
targetPort: 80
nodePort: 30004
selector:
app: nginx-linux39
#ExecAction:处理方式，结果一样。
[root@localhost7C case5]# cat redis-ExecAction.yml
apiVersion: apps/v1
kind: Deployment
metadata:
name: redis-deployment
labels:
app: redis
spec:
replicas: 1
selector:
matchLabels:
app: redis-linux39
template:
metadata:
labels:
app: redis-linux39
spec:
containers:
- name: redis
image: redis:4.0.14
ports:
- containerPort: 6379
livenessProbe:
exec: #ExecAction:处理方式
command:
#- /apps/redis/bin/redis-cli
- /usr/local/bin/redis-cli
- quit
initialDelaySeconds: 5
periodSeconds: 3
timeoutSeconds: 5
successThreshold: 1
failureThreshold: 3
readinessProbe:
exec: #ExecAction:处理方式
command:
#- /apps/redis/bin/redis-cli #错误路径
- /usr/local/bin/redis-cli
- quit
initialDelaySeconds: 5
periodSeconds: 3
timeoutSeconds: 5
successThreshold: 1
failureThreshold: 3
---
kind: Service
apiVersion: v1
metadata:
labels:
app: magedu-redis-service-label
name: magedu-redis-service
namespace: default
spec:
type: NodePort
ports:
- name: http
port: 80
protocol: TCP
targetPort: 6379
nodePort: 30005
selector:
app: redis-linux39
k8s在Pod出现异常的时候会自动将Pod重启以恢复Pod中的服务，Pod重启策略。
restartPolicy：
Always： 当容器异常时，k8s自动重启该容器，ReplicationController/Replicaset/Deployment。
OnFailure： 当容器失败时(容器停止运行且退出码不为0)，k8s自动重启该容器。
Never： 不论容器运行状态如何都不会重启该容器,Job或CronJob。
[root@localhost7C case5]# cat redis-ExecAction.yml
apiVersion: apps/v1
kind: Deployment
metadata:
name: redis-deployment
labels:
app: redis
spec:
replicas: 1
selector:
matchLabels:
app: redis-linux39
template:
metadata:
labels:
app: redis-linux39
spec:
containers:
- name: redis
image: redis:4.0.14
ports:
- containerPort: 6379
livenessProbe:
exec: #ExecAction:处理方式
command:
- /apps/redis/bin/redis-cli #错误路径
#- /usr/local/bin/redis-cli
- quit
initialDelaySeconds: 5
periodSeconds: 3
timeoutSeconds: 5
successThreshold: 1
failureThreshold: 3
readinessProbe:
exec: #ExecAction:处理方式
command:
- /apps/redis/bin/redis-cli #错误路径
#- /usr/local/bin/redis-cli
- quit
initialDelaySeconds: 5
periodSeconds: 3
timeoutSeconds: 5
successThreshold: 1
failureThreshold: 3
restartPolicy: Always
---
kind: Service
apiVersion: v1
metadata:
labels:
app: magedu-redis-service-label
name: magedu-redis-service
namespace: default
spec:
type: NodePort
ports:
- name: http
port: 80
protocol: TCP
targetPort: 6379
nodePort: 30005
selector:
app: redis-linux39
#当配合两种探针时，一直循环重启
[root@localhost7C ~]# kubectl get pod -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
redis-deployment-6c594c6dd6-8dpst 0/1 CrashLoopBackOff 12 21m 10.10.3.63 localhost7f.localdomain <none> <none>
我们在日常的集群维护中经常使用 kubectl get pod 查看pod的状态。 状态值 含义 CrashLoopBackOff 容器退出，kubelet正在将它重启 Terminating 结束 completed job资源正常启动 InvalidImageName 无法解析镜像名称 ImageInspectError 无法校验镜像 ErrImageNeverPull 策略禁止拉取镜像 ImagePullBackOff 正在重试拉取 RegistryUnavailable 连接不到镜像仓库（如：harbor） ErrImagePull 拉取镜像出错 CreateContainerConfigError 不能创建kubelet使用的容器配置 CreateContainerError 创建容器失败 m.internalLifecycle.PreStartContainer 执行hook报错 RunContainerError 启动容器失败 PostStartHookError 执行hook报错 ContainersNotInitialized 容器没有初始化完毕 ContainersNotReady 容器没有准备完毕 ContainerCreating 容器创建中 PodInitializing pod 初始化中 DockerDaemonNotReady docker还没有完全启动 NetworkPluginNotReady 网络插件还没有完全启动 Evicted 即驱赶(当节点出现异常时,kubernetes将有相应的 Pending: #正在创建Pod但是Pod中的容器还没有全部被创建完成，处于此状态的Pod应该检查Pod依赖的存储是否有权限挂载、镜像是否可以下载、调度是否正常等。 Failed #Pod中有容器启动失败而导致pod工作异常。 Unknown #由于某种原因无法获得pod的当前状态，通常是由于与pod所在的node节点通信错误。 Succeeded #Pod中的所有容器都被成功终止即pod里所有的containers均已terminated。 Unschedulable： #Pod不能被调度，kube-scheduler没有匹配到合适的node节点 PodScheduled #pod正处于调度中，在kube-scheduler刚开始调度的时候，还没有将pod分配到指定的pid，在筛选出合适的节点后就会更新etcd数据，将pod分配到指定的pod Initialized #所有pod中的初始化容器已经完成了 ImagePullBackOff：#Pod所在的node节点下载镜像失败 Running #Pod内部的容器已经被创建并且启动。 Ready #表示pod中的容器已经可以提供访问服务
标签：name,80,探针,app,redis,nginx,pod,重启 From： https://www.cnblogs.com/Yuanbangchen/p/17191568.html