带有AspNet Core Web API的容器可以在Docker上运行,而不能在AKS Kubernetes上运行

时间:2019-06-02 14:48:04

标签: docker asp.net-core kubernetes asp.net-core-2.2 azure-aks

我有一个ASP.Net Core Web API 2.2项目,该项目通常在本地Docker桌面上运行。我正在尝试在Azure的AKS上运行它,但它不会在那里运行,我也不明白为什么。
以下是我用于将项目发布到app目录中的PowerShell脚本,该目录随后将插入到容器中:

Remove-Item ..\..\..\..\projects\MyProject.Selenium.Commom\src\Selenium.API\bin\Release\* -Force -Recurse
dotnet publish ..\..\..\..\projects\MyProject.Selenium.Commom\src\Selenium.Comum.sln -c Release -r linux-musl-x64
$path = (Get-Location).ToString() + "\app"
if (Test-Path($path))
{
    Remove-Item -Path $path -Force -Recurse
}
New-Item -ItemType Directory -Force app
Get-ChildItem ..\..\..\..\projects\MyProject.Selenium.Commom\src\Selenium.API\bin\Release\netcoreapp2.2\linux-musl-x64\publish\* | Copy-Item -Destination .\app -Recurse

这是我的Dockerfile

# Build runtime image
FROM mcr.microsoft.com/dotnet/core/runtime:2.2-alpine3.9
WORKDIR /app /app
WORKDIR /app
ENTRYPOINT ["dotnet", "Selenium.API.dll"]

下面是我的Docker构建命令:

docker build -t mylocaldocker/selenium-web-app:latest -t mylocaldocker/selenium-web-app:v0.0.2 .

还有我的Docker运行命令

docker run --name selweb --detach --rm -p 85:80 mylocaldocker/selenium-web-app:latest

一切都变得顺畅流畅,而且我能够在端口85上本地发送请求而不会出现问题(IIS正在使用端口80)
但是,在Azure的AKS上执行类似的步骤,该容器将无法启动。我使用相同的PowerShell脚本发布应用程序,并且dockerfile也相同。我的构建命令发生了更改,以便可以推送到Azure的Docker注册表:

docker build -t myproject.azurecr.io/selenium-web-app:latest -t myproject.azurecr.io/selenium-web-app:v0.0.1 .

我登录到Azure Docker注册表,然后将映像推送到它:

docker push myproject.azurecr.io/selenium-web-app:latest

我已经创建了我的AKS集群,并获得了从注册表中提取图像的权限。我尝试使用以下命令在AKS上运行图像:

kubectl run seleniumweb --image myproject.azurecr.io/selenium-web-app:latest --port 80

我得到答复

deployment.apps "seleniumweb" created

但是,当我得到正在运行的吊舱时:

kubectl get pods

我的广告连播状态错误

NAME                           READY     STATUS    RESTARTS   AGE
seleniumweb-7b5f645698-9g7f6   0/1       Error     4          1m

当我从吊舱中获取日志时:

kubectl logs seleniumweb-7b5f645698-9g7f6

我回来了:

Did you mean to run dotnet SDK commands? Please install dotnet SDK from:
  https://go.microsoft.com/fwlink/?LinkID=798306&clcid=0x409

以下是kubectl描述广告连播的结果:

kubectl describe pods
Name:               seleniumweb-7b5f645698-9g7f6
Namespace:          default
Priority:           0
PriorityClassName:  <none>
Node:               aks-agentpool-41564776-0/10.240.0.4
Start Time:         Sun, 02 Jun 2019 11:40:47 -0300
Labels:             pod-template-hash=7b5f645698
                    run=seleniumweb
Annotations:        <none>
Status:             Running
IP:                 10.240.0.25
Controlled By:      ReplicaSet/seleniumweb-7b5f645698
Containers:
  seleniumweb:
    Container ID:   docker://1d548f4934632efb0b7c5a59dd0ac2bd173f2ee8fa5196b45d480fb10e88a536
    Image:          myproject.azurecr.io/selenium-web-app:latest
    Image ID:       docker-pullable://myproject.azurecr.io/selenium-web-app@sha256:97e2915a8b43aa8e726799b76274bb9b5b852cb6c78a8630005997e310cfd41a
    Port:           80/TCP
    Host Port:      0/TCP
    State:          Waiting
      Reason:       CrashLoopBackOff
    Last State:     Terminated
      Reason:       Error
      Exit Code:    145
      Started:      Sun, 02 Jun 2019 11:43:39 -0300
      Finished:     Sun, 02 Jun 2019 11:43:39 -0300
    Ready:          False
    Restart Count:  5
    Environment:
      KUBERNETES_PORT_443_TCP_ADDR:  myprojectus-dns-54302b78.hcp.eastus2.azmk8s.io
      KUBERNETES_PORT:               tcp://myprojectus-dns-54302b78.hcp.eastus2.azmk8s.io:443
      KUBERNETES_PORT_443_TCP:       tcp://myprojectus-dns-54302b78.hcp.eastus2.azmk8s.io:443
      KUBERNETES_SERVICE_HOST:       myprojectus-dns-54302b78.hcp.eastus2.azmk8s.io
    Mounts:
      /var/run/secrets/kubernetes.io/serviceaccount from default-token-mhvfv (ro)
Conditions:
  Type              Status
  Initialized       True
  Ready             False
  ContainersReady   False
  PodScheduled      True
Volumes:
  default-token-mhvfv:
    Type:        Secret (a volume populated by a Secret)
    SecretName:  default-token-mhvfv
    Optional:    false
QoS Class:       BestEffort
Node-Selectors:  <none>
Tolerations:     node.kubernetes.io/not-ready:NoExecute for 300s
                 node.kubernetes.io/unreachable:NoExecute for 300s
Events:
  Type     Reason     Age                From                               Message
  ----     ------     ----               ----                               -------
  Normal   Scheduled  5m                 default-scheduler                  Successfully assigned default/seleniumweb-7b5f645698-9g7f6 to aks-agentpool-41564776-0
  Normal   Created    4m (x4 over 5m)    kubelet, aks-agentpool-41564776-0  Created container
  Normal   Started    4m (x4 over 5m)    kubelet, aks-agentpool-41564776-0  Started container
  Normal   Pulling    3m (x5 over 5m)    kubelet, aks-agentpool-41564776-0  pulling image "myproject.azurecr.io/selenium-web-app:latest"
  Normal   Pulled     3m (x5 over 5m)    kubelet, aks-agentpool-41564776-0  Successfully pulled image "myproject.azurecr.io/selenium-web-app:latest"
  Warning  BackOff    20s (x24 over 5m)  kubelet, aks-agentpool-41564776-0  Back-off restarting failed container

我不明白为什么,因为在本地Docker上一切正常。任何帮助将不胜感激。谢谢

1 个答案:

答案 0 :(得分:1)

那个Dockerfile看起来很有趣。它什么也没做。 WORKDIR只是“为Dockerfile中跟随它的所有RUN,CMD,ENTRYPOINT,COPY和ADD指令设置工作目录”(来自docs.docker.com)。因此,您要设置工作目录两次,然后再进行其他设置。然后,入口点将指向不存在的.dll,因为您从未将其复制过。我想您想删除第一个WORKDIR命令,并在其余WORKDIR命令之后添加它:

COPY . ./

更好的是,使用two stage build,使其在docker上构建,然后将构建复制到发布的运行时映像。

我不知道为什么docker run在本地为您工作。是否以某种方式拾取了旧图像?基于您的Dockerfile,它不应运行。