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修改本地hosts文件及外部访问机器本地hosts文件后,rancher UI网站仍然不能访问_rancher ui pod 怎么添加hosts

rancher ui pod 怎么添加hosts

原因排查

kubectl get svc

# 输出:
NAME         TYPE        CLUSTER-IP   EXTERNAL-IP   PORT(S)   AGE
kubernetes   ClusterIP   10.96.0.1    <none>        443/TCP   4d17h
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kubectl get svc -A

# 输出:
NAMESPACE                         NAME                                 TYPE           CLUSTER-IP       EXTERNAL-IP      PORT(S)                      AGE
cattle-fleet-system               gitjob                               ClusterIP      10.111.178.163   <none>           80/TCP                       18h
cattle-provisioning-capi-system   capi-webhook-service                 ClusterIP      10.109.173.131   <none>           443/TCP                      4d16h
cattle-system                     rancher                              ClusterIP      10.108.22.229    <none>           80/TCP,443/TCP               18h
cattle-system                     rancher-webhook                      ClusterIP      10.110.157.18    <none>           443/TCP                      18h
cert-manager                      cert-manager                         ClusterIP      10.97.116.89     <none>           9402/TCP                     4d17h
cert-manager                      cert-manager-webhook                 ClusterIP      10.99.135.71     <none>           443/TCP                      4d17h
default                           kubernetes                           ClusterIP      10.96.0.1        <none>           443/TCP                      4d17h
ingress-nginx                     ingress-nginx-controller             LoadBalancer   10.102.90.59     192.168.21.157   80:31759/TCP,443:32560/TCP   4d17h
ingress-nginx                     ingress-nginx-controller-admission   ClusterIP      10.110.70.3      <none>           443/TCP                      4d17h
kube-system                       kube-dns                             ClusterIP      10.96.0.10       <none>           53/UDP,53/TCP,9153/TCP       4d17h
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kubectl get ingress -A

# 输出:
NAMESPACE       NAME      CLASS    HOSTS             ADDRESS   PORTS     AGE
cattle-system   rancher   <none>   rancher.xxx.com             80, 443   18h
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kubectl describe ingress -A

# 输出:
Name:             rancher
Labels:           app=rancher
                  app.kubernetes.io/managed-by=Helm
                  chart=rancher-2.8.5
                  heritage=Helm
                  release=rancher
Namespace:        cattle-system
Address:          
Ingress Class:    <none>
Default backend:  <default>
TLS:
  tls-rancher-ingress terminates rancher.xxx.com
Rules:
  Host             Path  Backends
  ----             ----  --------
  rancher.xxx.com  
                   /   rancher:80 (10.244.167.180:80,10.244.167.181:80,10.244.167.182:80)
Annotations:       meta.helm.sh/release-name: rancher
                   meta.helm.sh/release-namespace: cattle-system
                   nginx.ingress.kubernetes.io/proxy-connect-timeout: 30
                   nginx.ingress.kubernetes.io/proxy-read-timeout: 1800
                   nginx.ingress.kubernetes.io/proxy-send-timeout: 1800
Events:            <none>
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ls

查看相关文件(看不看都行)

由kubectl get ingress -A显示可知class为none且address也没有被分配地址导致的网页打不开(我查看的例子也有同上显示却能访问Racher的,无奈我学艺不精,小白一个,adrress既然动态分配不到,那我只能指定一个啦)

此时尝试创建一个ingress class文件,虽然文件创建成功,但是再次查看kubectl get ingress -A发现class仍然是,因此默认的class最好在rancher install之前安装。

# 创建/编辑ingress class
vim nginx-ingress-set-default.yml

# 文件内容
apiVersion: networking.k8s.io/v1
kind: IngressClass
metadata:
  labels:
    app.kubernetes.io/component: controller
  name: nginx-ingress
  annotations:
    ingressclass.kubernetes.io/is-default-class: "true"
spec:
  controller: k8s.io/ingress-nginx
  
# 应用
kubectl  apply -f nginx-ingress-set-default.yml 
# ingressclass.networking.k8s.io/nginx-ingress created

# 查看
kubectl get ingress -A
# NAMESPACE       NAME      CLASS    HOSTS             ADDRESS   PORTS     AGE
# cattle-system   rancher   <none>   rancher.xxx.com             80, 443   18h
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已经安装完rancher并且不想再重新安装,可以修改下rancher配置

  • 不在原目录下操作,进入tmp目录cd /tmp/
  • 查看下tmp目录是否有文件,可以不看ls,但最好看下,万一失败还可以恢复原来的tmp文件删除冗余文件
  • 查看kubectl get ingress/rancher -n cattle-system,发现CLASS是,ADDRESS为空
  • 获取 k8s集群cattle-system 命名空间下 rancher 的 Ingress 资源的详细信息,并以 YAML 格式输出,kubectl get ingress/rancher -n cattle-system -o yaml
    # 输出
    apiVersion: networking.k8s.io/v1
    kind: Ingress
    metadata:
      annotations:
        meta.helm.sh/release-name: rancher
        meta.helm.sh/release-namespace: cattle-system
        nginx.ingress.kubernetes.io/proxy-connect-timeout: "30"
        nginx.ingress.kubernetes.io/proxy-read-timeout: "1800"
        nginx.ingress.kubernetes.io/proxy-send-timeout: "1800"
      creationTimestamp: "2024-07-29T08:54:02Z"
      generation: 1
      labels:
        app: rancher
        app.kubernetes.io/managed-by: Helm
        chart: rancher-2.8.5
        heritage: Helm
        release: rancher
      name: rancher
      namespace: cattle-system
      resourceVersion: "1370584"
      uid: b1fe8833-6c77-4969-aa11-e2be56d719c5
    spec:
      # 这里增加一行
      rules:
      - host: rancher.xxx.com
        http:
          paths:
          - backend:
              service:
                name: rancher
                port:
                  number: 80
            path: /
            pathType: ImplementationSpecific
      tls:
      - hosts:
        - rancher.xxx.com
        secretName: tls-rancher-ingress
    status:
      loadBalancer: {}
    
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  • 查看rancher 的 Ingress 资源并将其重定向到/tmp/test.yaml 文件kubectl get ingress/rancher -n cattle-system -o yaml > /tmp/test.yaml
  • 编辑/tmp/test.yaml
    [...]
      uid: b1fe8833-6c77-4969-aa11-e2be56d719c5
    spec:
      # 增加 ingressClassName: nginx-ingress
      ingressClassName: nginx-ingress
      rules:
      - host: rancher.lxq.com
        http:
          paths:
          - backend:
              service:
                name: rancher
                port:
                  number: 80
            path: /
            pathType: ImplementationSpecific
     [...]
    
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  • 应用/tmp/test.yaml kubectl apply -f test.yaml -n cattle-system
    # 我这里虽然报错但是经过下方查看命令发现ingress相关已经更新,经测试Rancher UI成功链接
     kubectl apply -f test.yaml -n cattle-system 
    # Error from server (Conflict): error when applying patch:
    # {"metadata":{"generation":1,"resourceVersion":"1370584"}}
    # to:
    # Resource: "networking.k8s.io/v1, Resource=ingresses", GroupVersionKind: "networking.k8s.io/v1, Kind=Ingress"
    # Name: "rancher", Namespace: "cattle-system"
    # for: "test.yaml": error when patching "test.yaml": Operation cannot be fulfilled on ingresses.networking.k8s.io "rancher": the object has been modified; please apply your changes to the latest version and try again
    
    # 查看
    kubectl get ingress -A
    # NAMESPACE       NAME      CLASS           HOSTS             ADDRESS          PORTS     AGE
    # cattle-system   rancher   nginx-ingress   rancher.xxx.com   192.168.21.157   80, 443   18h
    
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  • Error from server (Conflict): error when applying patch: …
    the object has been modified; please apply your changes to the latest version and try again这个错误表明你正在尝试应用的配置已经被修改过了。kubectl apply 通过资源的 generation 和 resourceVersion 来确定资源的当前状态。如果这些值与你的配置文件中的不匹配,Kubernetes 就会阻止应用,以防止潜在的配置冲突。

从提供的输出和错误信息来看,这里发生了两件事情:

  1. 第一次执行 kubectl apply -f test.yaml 时的警告:

    Warning: resource ingresses/rancher is missing the kubectl.kubernetes.io/last-applied-configuration annotation which is required by kubectl apply.
    
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    这个警告说明,你正在尝试使用 kubectl apply 命令应用一个没有 kubectl.kubernetes.io/last-applied-configuration 注解的资源。这个注解是 kubectl apply 用来确定资源是否被修改过的关键信息。如果资源没有这个注解,kubectl apply 将自动添加它,并警告用户。

  2. 后续执行 kubectl apply -f test.yaml -n cattle-system 时的错误:

    Error from server (Conflict): error when applying patch: ...
    the object has been modified; please apply your changes to the latest version and try again
    
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    这个错误表明你正在尝试应用的配置已经被修改过了。kubectl apply 通过资源的 generationresourceVersion 来确定资源的当前状态。如果这些值与你的配置文件中的不匹配,Kubernetes 就会阻止应用,以防止潜在的配置冲突。

    解决步骤:

    • 使用 kubectl apply 时,确保你使用的是最新的配置文件。如果你手动编辑了资源或通过其他方式修改了它,你需要重新获取最新的配置,然后再应用。

    • 如果你确定配置文件是最新的,或者你想强制更新资源,你可以使用 kubectl replace -f test.yaml -n cattle-system 命令替代 kubectl apply。这个命令会替换现有的资源而不是尝试应用差异。

    • 如果你收到冲突错误,并且想要解决它,你可以先获取当前的资源状态,然后再次应用你的配置:

      kubectl get ingress rancher -o yaml -n cattle-system > test.yaml
      kubectl apply -f test.yaml -n cattle-system
      
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    • 检查资源是否正确应用

      kubectl get ingress -A
      
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