前言：
云原生|kubernetes|kubernetes集群部署神器kubekey的初步使用（centos7下的kubekey使用）_晚风_END的博客-CSDN博客
前面利用kubekey部署了一个简单的非高可用，etcd单实例的kubernetes集群，经过研究，发现部署过程可以简化，省去了一部分下载过程（主要是下载kubernetes组件的过程）只是kubernetes版本会固定在1.22.16版本，etcd集群可以部署成生产用的外部集群，并且apiserver等等组件也是高可用，并且部署非常简单，因此，也就非常nice了。
一，
离线安装包
####注，该离线包适用于centos7并在centos7下全系列验证通过，欧拉的部分版本应该也可以使用
链接：https://pan.baidu.com/s/1d4YR_a244iZj5aj2DJLU2w?pwd=kkey
提取码：kkey
安装包内大体有如下文件：
第一个没什么好说的，kubekey的安装包，解压后查看是否有执行权限就可以了，如果没有，添加执行权限
第二个是kubernetes组件的二进制文件，直接解压到root目录下就可以了
第三个是强依赖，解压后，进入解压后目录，执行 rpm -ivh * 就可以了，
第四个事部署清单，需要按照 实际的情况填写IP，还有服务器的密码，别的基本不需要动
然后就可以执行部署工作了，只是会拉取一些镜像，这些镜像是从kubesphere官网拉取，如果嫌拉取镜像太慢，可以export KKZONE=cn ，然后镜像都会从阿里云拉取。
二，
部署清单文件的解析
文件内容如下：
主要是hosts标签，roleGroups标签
hosts标签下面，有几个节点写几个节点，我实验的时候是使用了四个VMware虚拟机，每个虚拟机是4G内存，2CPUI的规格，IP地址和密码按实际填写
用户使用的是root，其实也是避免一些失败的情况，毕竟root权限最高嘛，部署安装工作还是不要花里胡哨的用普通用户（yum部署都从来不用普通用户，就是避免失败的嘛）。
roleGroups的标签是11，12,13 这三个节点做主节点，也是etcd集群的节点
高可用使用的haproxy，具体实现细节还没分析出来。
具体的安装部署的日志在/root/kubekey/logs
apiVersion: kubekey.kubesphere.io/v1alpha2
kind: Cluster
metadata:
name: sample
spec:
hosts:
- {name: node1, address: 192.168.123.11, internalAddress: 192.168.123.11, user: root, password: "密码"}
- {name: node2, address: 192.168.123.12, internalAddress: 192.168.123.12, user: root, password: "密码"}
- {name: node3, address: 192.168.123.13, internalAddress: 192.168.123.13, user: root, password: "密码"}
- {name: node4, address: 192.168.123.14, internalAddress: 192.168.123.14, user: root, password: "密码"}
roleGroups:
etcd:
- node1
- node2
- node3
control-plane:
- node1
- node2
- node3
worker:
- node4
controlPlaneEndpoint:
## Internal loadbalancer for apiservers
internalLoadbalancer: haproxy
domain: lb.kubesphere.local
address: ""
port: 6443
kubernetes:
version: v1.23.16
clusterName: cluster.local
autoRenewCerts: true
containerManager: docker
etcd:
type: kubekey
network:
plugin: calico
kubePodsCIDR: 10.244.0.0/18
kubeServiceCIDR: 10.96.0.0/18
## multus support. https://github.com/k8snetworkplumbingwg/multus-cni
multusCNI:
enabled: false
registry:
privateRegistry: ""
namespaceOverride: ""
registryMirrors: []
insecureRegistries: []
addons: []
三，
部署完成的状态检查
Warning: v1 ComponentStatus is deprecated in v1.19+
NAME STATUS MESSAGE ERROR
controller-manager Healthy ok
scheduler Healthy ok
etcd-2 Healthy {"health":"true"}
etcd-1 Healthy {"health":"true"}
etcd-0 Healthy {"health":"true"}
[root@centos1 ~]# kubectl get po -A -owide
NAMESPACE NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
kube-system calico-kube-controllers-84897d7cdf-hrj4f 1/1 Running 0 152m 10.244.28.2 node3 <none> <none>
kube-system calico-node-2m7hp 1/1 Running 0 152m 192.168.123.11 node1 <none> <none>
kube-system calico-node-5ztjk 1/1 Running 0 152m 192.168.123.14 node4 <none> <none>
kube-system calico-node-96dmb 1/1 Running 0 152m 192.168.123.13 node3 <none> <none>
kube-system calico-node-rqp2p 1/1 Running 0 152m 192.168.123.12 node2 <none> <none>
kube-system coredns-b7c47bcdc-bbxck 1/1 Running 0 152m 10.244.28.3 node3 <none> <none>
kube-system coredns-b7c47bcdc-qtvhf 1/1 Running 0 152m 10.244.28.1 node3 <none> <none>
kube-system haproxy-node4 1/1 Running 0 152m 192.168.123.14 node4 <none> <none>
kube-system kube-apiserver-node1 1/1 Running 0 152m 192.168.123.11 node1 <none> <none>
kube-system kube-apiserver-node2 1/1 Running 0 152m 192.168.123.12 node2 <none> <none>
kube-system kube-apiserver-node3 1/1 Running 0 152m 192.168.123.13 node3 <none> <none>
kube-system kube-controller-manager-node1 1/1 Running 0 152m 192.168.123.11 node1 <none> <none>
kube-system kube-controller-manager-node2 1/1 Running 0 152m 192.168.123.12 node2 <none> <none>
kube-system kube-controller-manager-node3 1/1 Running 0 152m 192.168.123.13 node3 <none> <none>
kube-system kube-proxy-649mn 1/1 Running 0 152m 192.168.123.14 node4 <none> <none>
kube-system kube-proxy-7q7ts 1/1 Running 0 152m 192.168.123.13 node3 <none> <none>
kube-system kube-proxy-dmd7v 1/1 Running 0 152m 192.168.123.12 node2 <none> <none>
kube-system kube-proxy-fpb6z 1/1 Running 0 152m 192.168.123.11 node1 <none> <none>
kube-system kube-scheduler-node1 1/1 Running 0 152m 192.168.123.11 node1 <none> <none>
kube-system kube-scheduler-node2 1/1 Running 0 152m 192.168.123.12 node2 <none> <none>
kube-system kube-scheduler-node3 1/1 Running 0 152m 192.168.123.13 node3 <none> <none>
kube-system nodelocaldns-565pz 1/1 Running 0 152m 192.168.123.12 node2 <none> <none>
kube-system nodelocaldns-dpwlx 1/1 Running 0 152m 192.168.123.13 node3 <none> <none>
kube-system nodelocaldns-ndlbw 1/1 Running 0 152m 192.168.123.14 node4 <none> <none>
kube-system nodelocaldns-r8gjl 1/1 Running 0 152m 192.168.123.11 node1 <none> <none>
[root@centos1 ~]# kubectl get no -owide
NAME STATUS ROLES AGE VERSION INTERNAL-IP EXTERNAL-IP OS-IMAGE KERNEL-VERSION CONTAINER-RUNTIME
node1 Ready control-plane,master 152m v1.23.16 192.168.123.11 <none> CentOS Linux 7 (Core) 3.10.0-1062.el7.x86_64 docker://20.10.8
node2 Ready control-plane,master 152m v1.23.16 192.168.123.12 <none> CentOS Linux 7 (Core) 3.10.0-1062.el7.x86_64 docker://20.10.8
node3 Ready control-plane,master 152m v1.23.16 192.168.123.13 <none> CentOS Linux 7 (Core) 3.10.0-1062.el7.x86_64 docker://20.10.8
node4 Ready worker 152m v1.23.16 192.168.123.14 <none> CentOS Linux 7 (Core) 3.10.0-1062.el7.x86_64 docker://20.10.8
在将12 节点关闭后，可以看到 kubernetes集群仍可以正常运行（11不能关，因为是管理节点嘛，那些集群的config文件没拷贝到其它节点）