Helm Chart部署KubeFed

选择cluster01作为KubeFed的主集群，将cluster02作为成员集群加入集群联邦。

首先，需要在主集群中安装并部署KubeFed，使用Helm Chart进行部署，需要安装Helm3客户端，命令如下。

$ curl https://raw.githubusercontent.com/helm/helm/master/scripts/get-helm-3 | bash
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100 11213  100 11213    0     0   110k      0 --:--:-- --:--:-- --:--:--  110k
Downloading https://get.helm.sh/helm-v3.4.1-linux-amd64.tar.gz
Verifying checksum... Done.
Preparing to install helm into /usr/local/bin
helm installed into /usr/local/bin/helm

添加KubeFed的chart repo，命令如下。

$ helm repo add kubefed-charts https://raw.githubusercontent.com/kubernetes-sigs/kubefed/master/charts
$ helm repo list
NAME            URL
kubefed-charts  https://raw.githubusercontent.com/kubernetes-sigs/kubefed/master/charts

chart repo添加完毕后，可以使用下面的命令查看有哪些可用的chart及对应的版本号。

$ helm search repo kubefed
NAME                    CHART VERSION   APP VERSION DESCRIPTION
kubefed-charts/kubefed  0.5.0                       KubeFed helm chart

安装KubeFed，命令如下。

$ helm --namespace kube-federation-system upgrade -i kubefed kubefed-charts/kubefed --version=0.5.0 --create-namespace
Release "kubefed" does not exist. Installing it now.
NAME: kubefed
LAST DEPLOYED: Fri Nov 13 16:43:58 2020
NAMESPACE: kube-federation-system
STATUS: deployed
REVISION: 1
TEST SUITE: None

安装完毕后，检查命名空间kube-federation-system下的kubefed-admission-webhook和kubefed-controller-manager组件是否运行正常。

$ kubectl -n kube-federation-system get deploy
NAME                         READY   UP-TO-DATE   AVAILABLE   AGE
kubefed-admission-webhook    1/1     1            1           3m
kubefed-controller-manager   2/2     2            2           3m

至此，KubeFed在主集群中的安装过程执行完毕。