K8S------Kubernetes双Master负载均衡集群搭建

前言

本篇Kubernetes双Master负载均衡集群搭建是基于Kubernetes单Master集群二进制搭建的基础上进行搭建的。

环境准备

节点	主机名	系统	IP地址	服务
K8S集群Master01	master01	CentOS 7	192.168.121.88	kube-apiserver kube-controller-manager kube-scheduler etcd
K8S集群Master02	master02	CentOS 7	192.168.121.77	kube-apiserver kube-controller-manager kube-scheduler etcd
K8S集群Node01	node01	CentOS 7	192.168.121.55	kubelet kube-proxy docker flannel
K8S集群Node01	node02	CentOS 7	192.168.121.66	kubelet kube-proxy docker flannel
Etcd集群节点01	——	CentOS 7	192.168.121.55	etcd
Etcd集群节点02	——	CentOS 7	192.168.121.66	etcd
Etcd集群节点03	——	CentOS 7	192.168.121.88	etcd
负载均衡Nginx+Keepalived（Master）	lb01	CentOS 7	192.168.121.11	nginx，keepalived
负载均衡Nginx+Keepalived（Backup）	lb02	CentOS 7	192.168.121.22	nginx，keepalived

#Master02节点操作 (192.168.121.77)
hostnamectl set-hostname master02
#lb01节点操作(192.168.121.11) 
hostnamectl set-hostname lb01
#lb02节点操作 (192.168.121.22)
hostnamectl set-hostname lb02

systemctl stop firewalld
setenforce 0

一.Master02 节点部署

1.在Master01节点上拷贝证书文件及服务管理文件

在master01 节点上操作

//从 master01 节点上拷贝证书文件、各master组件的配置文件和服务管理文件到 master02 节点
scp -r /opt/etcd/ root@192.168.121.77:/opt/
scp -r /opt/kubernetes/ root@192.168.121.77:/opt
scp /usr/lib/systemd/system/{
   kube-apiserver,kube-controller-manager,kube-scheduler}.service root@192.168.121.77:/usr/lib/systemd/system/

2.修改Apiserver配置文件

在master02 节点上操作

//修改配置文件kube-apiserver中的IP
vim /opt/kubernetes/cfg/kube-apiserver
KUBE_APISERVER_OPTS="--logtostderr=true \
--v=4 \
--etcd-servers=https://192.168.121.88:2379,https://192.168.121.55:2379,https://192.168.121.66:2379 \
--bind-address=192.168.121.77 \				#修改
--secure-port=6443 \
--advertise-address=192.168.121.77 \			#修改
......

3.启动服务

在master02 节点上操作

cd /opt/kubernetes/bin
ln -s /opt/kubernetes/bin/* /usr/local/bin
//在 master02 节点上启动各服务并设置开机自启
systemctl start kube-apiserver.service
systemctl enable kube-apiserver.service
systemctl start kube-controller-manager.service
systemctl enable kube-controller-manager.service
systemctl start kube-scheduler.service
systemctl enable kube-scheduler.service

4.查看Node节点状态

在master02 节点上操作

//查看node节点状态
kubectl get nodes
kubectl get nodes -o wide			#-o=wide：输出额外信息；对于Pod，将输出Pod所在的Node名
//此时在master02节点查到的node节点状态仅是从etcd查询到的信息，而此时node节点实际上并未与master02节点建立通信连接，因此需要使用一个VIP把node节点与master节点都关联起来