【发布时间】：2021-10-28 22:05:51
【问题描述】：
我正在尝试从 java 创建一个简单的 printsomething() 并将其加载到 docker 容器中以创建一个 k8s 集群以进行概念验证。
在 docker 上，我可以运行映像（如下所示），但是，当我在 k8s 上创建集群时，我收到错误 CrashLoopBackOff。但是，日志文件似乎显示了图像中预期的标准输出。 我可能对这里的方法和执行它的正确方法感到困惑，有人可以建议和指导吗？这应该是预期的吗？ 提前非常感谢。
$ kubectl logs cimage-deployment-679d474cb7-fgj2c -p
printing from java
docker 按预期运行：
$ docker run dockhub/cimage
printing from java
$
**//describe deployment:**
$ kubectl describe deployment cimage-deployment
Name: cimage-deployment
Namespace: default
CreationTimestamp: Mon, 30 Aug 2021 11:24:45 +0800
Labels: <none>
Annotations: deployment.kubernetes.io/revision: 1
Selector: deploy=cimage
Replicas: 3 desired | 3 updated | 3 total | 0 available | 3 unavailable
StrategyType: RollingUpdate
MinReadySeconds: 0
RollingUpdateStrategy: 25% max unavailable, 25% max surge
Pod Template:
Labels: deploy=cimage
Containers:
cimage:
Image: dockhub/cimage
Port: <none>
Host Port: <none>
Environment: <none>
Mounts: <none>
Volumes: <none>
Conditions:
Type Status Reason
---- ------ ------
Available False MinimumReplicasUnavailable
Progressing False ProgressDeadlineExceeded
OldReplicaSets: <none>
NewReplicaSet: cimage-deployment-679d474cb7 (3/3 replicas created)
Events: <none>
//描述吊舱
$ kubectl describe pod cimage
Name: cimage-deployment-679d474cb7-fgj2c
Namespace: default
Priority: 0
Node: minikube/192.168.49.2
Start Time: Mon, 30 Aug 2021 11:24:45 +0800
Labels: deploy=cimage
pod-template-hash=679d474cb7
Annotations: <none>
Status: Running
IP: 172.17.0.5
IPs:
IP: 172.17.0.5
Controlled By: ReplicaSet/cimage-deployment-679d474cb7
Containers:
cimage:
Container ID: docker://8891073c9e28c0b795c3c3b81f01d6c0fdd45785b102c458a28f58be3bfdbeed
Image: dockhub/cimage
Image ID: docker-pullable://dockhub/cimage@sha256:fcbbb160653681a06bceac0f7144a472326adb53c7f2335a32d188a854340456
Port: <none>
Host Port: <none>
State: Waiting
Reason: CrashLoopBackOff
Last State: Terminated
Reason: Completed
Exit Code: 0
Started: Mon, 30 Aug 2021 12:58:59 +0800
Finished: Mon, 30 Aug 2021 12:58:59 +0800
Ready: False
Restart Count: 23
Environment: <none>
Mounts:
/var/run/secrets/kubernetes.io/serviceaccount from kube-api-access-vpjc8 (ro)
Conditions:
Type Status
Initialized True
Ready False
ContainersReady False
PodScheduled True
Volumes:
kube-api-access-vpjc8:
Type: Projected (a volume that contains injected data from multiple sources)
TokenExpirationSeconds: 3607
ConfigMapName: kube-root-ca.crt
ConfigMapOptional: <nil>
DownwardAPI: true
QoS Class: BestEffort
Node-Selectors: <none>
Tolerations: node.kubernetes.io/not-ready:NoExecute op=Exists for 300s
node.kubernetes.io/unreachable:NoExecute op=Exists for 300s
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Warning BackOff 3m15s (x435 over 98m) kubelet, minikube Back-off restarting failed container
添加获取事件
$ kubectl get events
LAST SEEN TYPE REASON OBJECT MESSAGE
59m Normal Pulling pod/cimage-deployment-679d474cb7-fgj2c Pulling image "dockhub/cimage"
4m34s Warning BackOff pod/cimage-deployment-679d474cb7-fgj2c Back-off restarting failed container
4m29s Warning BackOff pod/cimage-deployment-679d474cb7-gbrfn Back-off restarting failed container
4m31s Warning BackOff pod/cimage-deployment-679d474cb7-vhwfx Back-off restarting failed container
7m32s Normal Scheduled pod/cimage-deployment-84dd6f49ff-4wrjc Successfully assigned default/cimage-deployment-84dd6f49ff-4wrjc to minikube
5m57s Normal Pulling pod/cimage-deployment-84dd6f49ff-4wrjc Pulling image "dockhub/cimage"
7m27s Normal Pulled pod/cimage-deployment-84dd6f49ff-4wrjc Successfully pulled image "dockhub/cimage" in 3.779122485s
5m54s Normal Created pod/cimage-deployment-84dd6f49ff-4wrjc Created container cimage
7m23s Normal Pulled pod/cimage-deployment-84dd6f49ff-4wrjc Successfully pulled image "dockhub/cimage" in 3.116714272s
7m8s Normal Pulled pod/cimage-deployment-84dd6f49ff-4wrjc Successfully pulled image "dockhub/cimage" in 3.458218385s
2m29s Warning BackOff pod/cimage-deployment-84dd6f49ff-4wrjc Back-off restarting failed container
6m39s Normal Pulled pod/cimage-deployment-84dd6f49ff-4wrjc Successfully pulled image "dockhub/cimage" in 3.577472371s
5m54s Normal Pulled pod/cimage-deployment-84dd6f49ff-4wrjc Successfully pulled image "dockhub/cimage" in 3.41519015s
7m32s Normal SuccessfulCreate replicaset/cimage-deployment-84dd6f49ff Created pod: cimage-deployment-84dd6f49ff-4wrjc
7m32s Normal ScalingReplicaSet deployment/cimage-deployment Scaled up replica set cimage-deployment-84dd6f49ff to 1
//跟进 Anisha 的解决方案，出现这种情况， 嘿 Ashish，我认为我的后续问题与原始主题无关，但我可以检查一下为什么会发生这种行为吗？吊舱不会不断重启吗？我找不到在“x”尝试后说停止的参数
$ kubectl get pod
NAME READY STATUS RESTARTS AGE
jimage-deployment-5cd99c7bf4-2x9vr 1/1 Running 0 68s
jimage-deployment-5cd99c7bf4-vfpsm 1/1 Running 0 68s
jimage-deployment-5cd99c7bf4-wxdxf 1/1 Running 0 68s
$ kubectl get pod
NAME READY STATUS RESTARTS AGE
jimage-deployment-5cd99c7bf4-2x9vr 1/1 Running 2 7m48s
jimage-deployment-5cd99c7bf4-vfpsm 1/1 Running 2 7m48s
jimage-deployment-5cd99c7bf4-wxdxf 1/1 Running 2 7m48s
$ kubectl get pod
NAME READY STATUS RESTARTS AGE
jimage-deployment-5cd99c7bf4-2x9vr 1/1 Running 5 20m
jimage-deployment-5cd99c7bf4-vfpsm 0/1 CrashLoopBackOff 5 20m
jimage-deployment-5cd99c7bf4-wxdxf 1/1 Running 5 20m
$ kubectl get pod
NAME READY STATUS RESTARTS AGE
jimage-deployment-5cd99c7bf4-2x9vr 0/1 CrashLoopBackOff 31 4h19m
jimage-deployment-5cd99c7bf4-vfpsm 0/1 CrashLoopBackOff 31 4h19m
jimage-deployment-5cd99c7bf4-wxdxf 0/1 CrashLoopBackOff 33 4h19m
【问题讨论】：
标签： java docker kubernetes dockerfile