我在一台机器上使用kubernetes进行测试,我已经从nginx docker图像构建了一个自定义图像,但是当我尝试在kubernetes中使用图像时,我得到一个图像拉错误?????
我的POD YAML
kind: Pod
apiVersion: v1
metadata:
name: yumserver
labels:
name: frontendhttp
spec:
containers:
- name: myfrontend
image: my/nginx:latest
ports:
- containerPort: 80
name: "http-server"
volumeMounts:
- mountPath: "/usr/share/nginx/html"
name: mypd
imagePullSecrets:
- name: myregistrykey
volumes:
- name: mypd
persistentVolumeClaim:
claimName: myclaim-1
我的KUBERNET命令
kubectl create -f pod-yumserver.yaml
错误
kubectl describe pod yumserver
Name: yumserver
Namespace: default
Image(s): my/nginx:latest
Node: 127.0.0.1/127.0.0.1
Start Time: Tue, 26 Apr 2016 16:31:42 +0100
Labels: name=frontendhttp
Status: Pending
Reason:
Message:
IP: 172.17.0.2
Controllers: <none>
Containers:
myfrontend:
Container ID:
Image: my/nginx:latest
Image ID:
QoS Tier:
memory: BestEffort
cpu: BestEffort
State: Waiting
Reason: ErrImagePull
Ready: False
Restart Count: 0
Environment Variables:
Conditions:
Type Status
Ready False
Volumes:
mypd:
Type: PersistentVolumeClaim (a reference to a PersistentVolumeClaim in the same namespace)
ClaimName: myclaim-1
ReadOnly: false
default-token-64w08:
Type: Secret (a secret that should populate this volume)
SecretName: default-token-64w08
Events:
FirstSeen LastSeen Count From SubobjectPath Type Reason Message
--------- -------- ----- ---- ------------- -------- ------ -------
13s 13s 1 {default-scheduler } Normal Scheduled Successfully assigned yumserver to 127.0.0.1
13s 13s 1 {kubelet 127.0.0.1} Warning MissingClusterDNS kubelet does not have ClusterDNS IP configured and cannot create Pod using "ClusterFirst" policy. Falling back to DNSDefault policy.
12s 12s 1 {kubelet 127.0.0.1} spec.containers{myfrontend} Normal Pulling pulling image "my/nginx:latest"
8s 8s 1 {kubelet 127.0.0.1} spec.containers{myfrontend} Warning Failed Failed to pull image "my/nginx:latest": Error: image my/nginx:latest not found
8s 8s 1 {kubelet 127.0.0.1} Warning FailedSync Error syncing pod, skipping: failed to "StartContainer" for "myfrontend" with ErrImagePull: "Error: image my/nginx:latest not found"
所以你的机器上有图像。它仍然试图从Docker Hub中提取图像,但这可能不是你想要的单机设置。发生这种情况是因为最新标记将imagePullPolicy设置为Always隐式。您可以尝试将其明确设置为IfNotPresent或更改为最新以外的标记。 - Timo Reimann 4月28日7:16
出于某种原因,Timo Reimann只是将上述内容作为评论发布,但它肯定应该是这个问题的正式答案,所以我再次发布它。
在构建映像之前运行eval $(minikube docker-env)。
进一步分析ErrImagePull
问题的最简单方法是ssh到节点并尝试通过执行docker pull my/nginx:latest
手动拉取图像。我从来没有在一台机器上设置Kubernetes,但可以想象由于某种原因无法从节点访问Docker守护程序。试图拉动尝试应该提供更多信息。
你在linux上使用minikube吗?你需要安装docker(我认为),但你不需要启动它。 Minikube会做到这一点。尝试使用此命令使用KVM驱动程序:
minikube start --vm-driver kvm
然后运行eval $(minikube docker-env)
命令以确保使用minikube docker环境。使用标签build -t mycontainername:version .
构建容器
如果然后键入docker ps
,你应该会看到一堆已经运行的minikube容器。 kvm utils可能已经在你的机器上,但它们可以像centos / rhel一样安装:
yum install qemu-kvm qemu-img virt-manager libvirt libvirt-python