TL:DR- 抱歉，如果这是基础知识，我正在学习 Kubernetes。
我尝试在 IBM Cloud 中创建 Kubernetes 部署，但失败了。该部署在我的本地 minikube 上运行良好，但在 IBM Cloud 中失败。我是否需要使用 IBM Cloud 命名空间进行部署，或者我是否应该能够从 Docker 公共产品将 Docker 映像拉取到 IBM Cloud 中？
长版
我正在学习有关 IBM Cloud Kubernetes 服务的本课程（https://courses.cognitiveclass.ai/courses/course-v1:CognitiveClass+CO0401EN+v1/info https://courses.cognitiveclass.ai/courses/course-v1:CognitiveClass+CO0401EN+v1/info)
在先决条件中，我需要为留言数据库部署 Redis。
这些步骤是：
1. 克隆仓库
$ clone https://github.com/IBM/guestbook.git
cd 到 /guestbook/v2
-
为主服务器和从服务器创建 Redis 控制器和服务：
$ kubectl create -f redis-master-deployment.yaml
问题是当我运行时：
$ kubectl create -f redis-master-deployment.yaml
部署失败：
$ kubectl get deployments -o wide
NAME READY UP-TO-DATE AVAILABLE AGE CONTAINERS IMAGES SELECTOR
redis-master 0/1 1 0 10m redis-master redis:3.2.9 app=redis,role=master
$ kubectl get pods -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
redis-master-577bc6fbb-b4trd 0/1 ImagePullBackOff 0 14m 172.30.113.18 10.241.0.11 <none> <none>
我在这里猜测，但看起来 IBM Cloud Kubernetes 服务无法联系 Docker 来获取映像。
$ kubectl describe pods redis-master-577bc6fbb-b4trd
Name: redis-master-577bc6fbb-b4trd
Namespace: default
Priority: 0
PriorityClassName: <none>
Node: 10.241.0.11/10.241.0.11
Start Time: Thu, 05 Mar 2020 12:01:45 -0500
Labels: app=redis
pod-template-hash=577bc6fbb
role=master
Annotations: kubernetes.io/psp: ibm-privileged-psp
Status: Pending
IP: 172.30.113.18
Controlled By: ReplicaSet/redis-master-577bc6fbb
Containers:
redis-master:
Container ID:
Image: redis:3.2.9
Image ID:
Port: 6379/TCP
Host Port: 0/TCP
State: Waiting
Reason: ErrImagePull
Ready: False
Restart Count: 0
Environment: <none>
Mounts:
/var/run/secrets/kubernetes.io/serviceaccount from default-token-rxmp2 (ro)
Conditions:
Type Status
Initialized True
Ready False
ContainersReady False
PodScheduled True
Volumes:
default-token-rxmp2:
Type: Secret (a volume populated by a Secret)
SecretName: default-token-rxmp2
Optional: false
QoS Class: BestEffort
Node-Selectors: <none>
Tolerations: node.kubernetes.io/not-ready:NoExecute for 600s
node.kubernetes.io/unreachable:NoExecute for 600s
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal Scheduled <unknown> default-scheduler Successfully assigned default/redis-master-577bc6fbb-b4trd to 10.241.0.11
Warning Failed 13m (x2 over 14m) kubelet, 10.241.0.11 Failed to pull image "redis:3.2.9": rpc error: code = Unknown desc = failed to pull and unpack image "docker.io/library/redis:3.2.9": failed to resolve reference "docker.io/library/redis:3.2.9": failed to do request: Head https://registry-1.docker.io/v2/library/redis/manifests/3.2.9: dial tcp 34.197.189.129:443: i/o timeout
Warning Failed 12m kubelet, 10.241.0.11 Failed to pull image "redis:3.2.9": rpc error: code = Unknown desc = failed to pull and unpack image "docker.io/library/redis:3.2.9": failed to resolve reference "docker.io/library/redis:3.2.9": failed to do request: Head https://registry-1.docker.io/v2/library/redis/manifests/3.2.9: dial tcp 3.224.75.242:443: i/o timeout
Normal Pulling 11m (x4 over 14m) kubelet, 10.241.0.11 Pulling image "redis:3.2.9"
Warning Failed 11m kubelet, 10.241.0.11 Failed to pull image "redis:3.2.9": rpc error: code = Unknown desc = failed to pull and unpack image "docker.io/library/redis:3.2.9": failed to resolve reference "docker.io/library/redis:3.2.9": failed to do request: Head https://registry-1.docker.io/v2/library/redis/manifests/3.2.9: dial tcp 54.210.105.17:443: i/o timeout
Normal BackOff 10m (x6 over 14m) kubelet, 10.241.0.11 Back-off pulling image "redis:3.2.9"
Warning Failed 9m21s (x5 over 14m) kubelet, 10.241.0.11 Error: ErrImagePull
Warning Failed 4m38s (x28 over 14m) kubelet, 10.241.0.11 Error: ImagePullBackOff
然后我去我的 minikube 进行测试并运行相同的命令
$ kubectl create -f ./redis-master-deployment.yaml
deployment.apps/redis-master created
$ kubectl get deployments -o wide
NAME READY UP-TO-DATE AVAILABLE AGE CONTAINERS IMAGES SELECTOR
redis-master 1/1 1 1 14s redis-master redis:3.2.9 app=redis,role=master
所以我只需要指出我在这里出错的方向。
