一、etcd集群搭建

所有节点安装etcd数据库

[root@k8s-master ~]# yum install etcd -y

 master节点的配置文件

[root@k8s-master ~]# grep -Ev '^$|#' /etc/etcd/etcd.conf
ETCD_DATA_DIR="/var/lib/etcd/"
ETCD_LISTEN_PEER_URLS="http://0.0.0.0:2380"
ETCD_LISTEN_CLIENT_URLS="http://0.0.0.0:2379"
ETCD_NAME="node1"
ETCD_INITIAL_ADVERTISE_PEER_URLS="http://10.0.0.11:2380"
ETCD_ADVERTISE_CLIENT_URLS="http://10.0.0.11:2379"
ETCD_INITIAL_CLUSTER="node1=http://10.0.0.11:2380,node2=http://10.0.0.12:2380,node3=http://10.0.0.13:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"
 

node1节点的配置文件

 [root@k8s-node1 ~]#  grep -Ev '^$|#' /etc/etcd/etcd.conf
ETCD_DATA_DIR="/var/lib/etcd/"
ETCD_LISTEN_PEER_URLS="http://0.0.0.0:2380"
ETCD_LISTEN_CLIENT_URLS="http://0.0.0.0:2379"
ETCD_NAME="node2"
ETCD_INITIAL_ADVERTISE_PEER_URLS="http://10.0.0.12:2380"
ETCD_ADVERTISE_CLIENT_URLS="http://10.0.0.12:2379"
ETCD_INITIAL_CLUSTER="node1=http://10.0.0.11:2380,node2=http://10.0.0.12:2380,node3=http://10.0.0.13:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"

node2节点的配置文件操作

 [root@k8s-node2 xiaoniao]#  grep -Ev '^$|#' /etc/etcd/etcd.conf
ETCD_DATA_DIR="/var/lib/etcd/"
ETCD_LISTEN_PEER_URLS="http://0.0.0.0:2380"
ETCD_LISTEN_CLIENT_URLS="http://0.0.0.0:2379"
ETCD_NAME="node3"
ETCD_INITIAL_ADVERTISE_PEER_URLS="http://10.0.0.13:2380"
ETCD_ADVERTISE_CLIENT_URLS="http://10.0.0.13:2379"
ETCD_INITIAL_CLUSTER="node1=http://10.0.0.11:2380,node2=http://10.0.0.12:2380,node3=http://10.0.0.13:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"

 master节点停止服务

systemctl stop flanneld.service
systemctl stop kube-apiserver.service 
systemctl stop kube-controller-manager.service 
 systemctl stop kube-scheduler.service 
 

所有node节点停止服务

systemctl stop flanneld.service
systemctl stop kubelet.service kube-proxy.service 
  systemctl start etcd
 

master节点清除之前安装的etcd数据信息

rm -fr /var/lib/etcd/* 

所有节点使用xshell功能同时启动

systemctl start etcd 

节点测试

[root@k8s-master ~]# etcdctl member list
9e80988e833ccb43: name=node1 peerURLs=http://10.0.0.11:2380 clientURLs=http://10.0.0.11:2379 isLeader=false
a10d8f7920cc71c7: name=node3 peerURLs=http://10.0.0.13:2380 clientURLs=http://10.0.0.13:2379 isLeader=false
abdc532bc0516b2d: name=node2 peerURLs=http://10.0.0.12:2380 clientURLs=http://10.0.0.12:2379 isLeader=true

[root@k8s-master ~]# etcdctl cluster-health
member 9e80988e833ccb43 is healthy: got healthy result from http://10.0.0.11:2379
member a10d8f7920cc71c7 is healthy: got healthy result from http://10.0.0.13:2379
member abdc532bc0516b2d is healthy: got healthy result from http://10.0.0.12:2379
cluster is healthy 

etcd数据库集群安装完成

 二、创建etcd数据

etcdctl mk /atomic.io/network/config   '{ "Network": "172.18.0.0/16" }'

systemctl  restart flanneld

systemctl  restart docker

 三、修改master节点的api-server,controller-manager,scheduler(127.0.0.1:8080)

vim /etc/kubernetes/apiserver 

KUBE_ETCD_SERVERS="--etcd-servers=http://10.0.0.11:2379,http://10.0.0.12:2379,http://10.0.0.13:2379"

​

vim /etc/kubernetes/config 

KUBE_MASTER="--master=http://127.0.0.1:8080"

​

systemctl restart kube-apiserver.service 

systemctl restart kube-controller-manager.service kube-scheduler.service 

 四、修改master02的api-server,controller-manager,scheduler(127.0.0.1:8080)

yum install kubernetes-master.x86_64 -y

scp -rp 10.0.0.11:/etc/kubernetes/apiserver /etc/kubernetes/apiserver

scp -rp 10.0.0.11:/etc/kubernetes/config /etc/kubernetes/config 

systemctl stop kubelet.service 

systemctl disable kubelet.service

systemctl stop kube-proxy.service 

systemctl disable kube-proxy.service

​

systemctl enable kube-apiserver.service

systemctl restart kube-apiserver.service

systemctl enable kube-controller-manager.service

systemctl restart kube-controller-manager.service

systemctl enable kube-scheduler.service

systemctl restart kube-scheduler.service

 五、安装keepalived

2台master安装keepalived

yum install keepalived.x86_64 -y

 

#master01配置:

! Configuration File for keepalived

​

global_defs {

   router_id LVS_DEVEL_11

}

​

vrrp_instance VI_1 {

    state BACKUP

    interface eth0

    virtual_router_id 51

    priority 100

    advert_int 1

    authentication {

        auth_type PASS

        auth_pass 1111

    }

    virtual_ipaddress {

        10.0.0.10

    }

}

​

#master02配置

! Configuration File for keepalived

​

global_defs {

   router_id LVS_DEVEL_12

}

​

vrrp_instance VI_1 {

    state BACKUP

    interface eth0

    virtual_router_id 51

    priority 80

    advert_int 1

    authentication {

        auth_type PASS

        auth_pass 1111

    }

    virtual_ipaddress {

        10.0.0.10

    }

}

​

systemctl  enable  keepalived

systemctl  start   keepalived

 所有node节点kubelet,kube-proxy指向api-server的vip

vim /etc/kubernetes/kubelet

KUBELET_API_SERVER="--api-servers=http://10.0.0.10:8080"

​

vim /etc/kubernetes/config 

KUBE_MASTER="--master=http://10.0.0.10:8080"

​

systemctl restart kubelet.service kube-proxy.service

 

node节点测试

[root@k8s-node2 xiaoniao]# kubectl -s 10.0.0.11:8080 get nodes
NAME        STATUS    AGE
10.0.0.13   Ready     5m
[root@k8s-node2 xiaoniao]# kubectl -s 10.0.0.12:8080 get nodes
NAME        STATUS    AGE
10.0.0.13   Ready     5m
 

创建节点

[root@k8s-node2 xiaoniao]# kubectl -s 10.0.0.10:8080 run nginx --image=10.0.0.11:5000/nginx:1.13 --replicas=2
 

查看节点

[root@k8s-node2 xiaoniao]# kubectl -s 10.0.0.10:8080 get all
 

 

给master节点1关机

然后继续查看节点

[root@k8s-node2 xiaoniao]# kubectl -s 10.0.0.10:8080 get all