k8s下keepalived-vip的安装

「爱情、让人受尽委屈。」 2022-03-27 03:24 287阅读 0赞

首先，进入[https://github.com/kubernetes/contrib/tree/master/keepalived-vip][https_github.com_kubernetes_contrib_tree_master_keepalived-vip]

clone最新的代码

1. 需要对结点打标签，如下所以：

kubectl label node node1 type=worker

2. 执行如下命令，创建账户

kubectl create sa kube-keepalived-vip

3. 修改contrib/keepalived-vip/vip-daemonset.yaml文件，在其中加入serviceAccount: kube-keepalived-vip：

spec:
          hostNetwork: true
          serviceAccount: kube-keepalived-vip
          containers:
            - image: k8s.gcr.io/kube-keepalived-vip:0.11

并将其中默认的k8s.gcr.io/kube-keepalived-vip:0.11改为gcr.mirrors.ustc.edu.cn/google-containers/kube-keepalived-vip:0.11

4. 执行如下命令：

echo 'apiVersion: rbac.authorization.k8s.io/v1beta1  
kind: ClusterRole  
metadata:  
  name: kube-keepalived-vip  
rules:  
\- apiGroups: \[""\]  
  resources:  
  - pods  
  - nodes  
  - endpoints  
  - services  
  - configmaps  
  verbs: \["get", "list", "watch"\]' | kubectl create -f -

这里要注意，github上给出的命令是有问题的，执行后保错：

error: unable to recognize "STDIN": no matches for kind "ClusterRole" in version "rbac.authorization.k8s.io/v1alpha1"

需要修改apiVersion，将v1beta1改为v1alpha1

5. 将如下内容写入rbac.yml

apiVersion: rbac.authorization.k8s.io/v1beta1  
kind: ClusterRoleBinding  
metadata:  
  name: kube-keepalived-vip  
roleRef:  
  apiGroup: rbac.authorization.k8s.io  
  kind: ClusterRole  
  name: kube-keepalived-vip  
subjects:  
\- kind: ServiceAccount  
  name: kube-keepalived-vip  
  namespace: default

执行kubectl create -f rbac.yml

6. 修改如下文件：contrib/keepalived-vip/vip-configmap.yaml  
apiVersion: v1  
kind: ConfigMap  
metadata:  
  name: vip-configmap  
data:  
  10.4.0.50: default/echoheaders

将其中的ip修改为需要创建的虚拟ip，注意这个ip应该与宿主机同一网段，并且没有被占用。此外，将echoheaders修改为需要使用的服务

7. 执行kubectl create -f contrib/keepalived-vip/vip-daemonset.yaml，启动虚拟机。

使用kubectl logs kube-keepalived-vip-tttxx 可以检查日志，注意，如果日志中频繁出现如下内容：

F0111 07:25:14.410876       1 controller.go:314\] Error getting POD information: timed out waiting to observe own status as Running

goroutine 1 \[running\]:

k8s.io/contrib/keepalived-vip/vendor/github.com/golang/glog.stacks(0xc42028fe00, 0xc420142140, 0x83, 0x9d)

说明权限配置有问题，需要重新检查2、3、4、5步是否正确执行。

[https_github.com_kubernetes_contrib_tree_master_keepalived-vip]: https://github.com/kubernetes/contrib/tree/master/keepalived-vip