单节点 ：https://blog.csdn.net/Yplayer001/article/details/104234807
优先关闭防火墙和selinux服务
在master01上操作
//复制kubernetes目录到master02
[root@localhost k8s]# scp -r /opt/kubernetes/ root@192.168.50.150:/opt
The authenticity of host '192.168.50.150 (192.168.50.150)' can't be established.
ECDSA key fingerprint is SHA256:APJMEiNcVfKUcen7B87XvVOjtToM3/xc7CbAgZamvKQ.
ECDSA key fingerprint is MD5:24:0b:7c:57:7d:b7:51:70:7a:f5:b9:2a:32:fc:f7:ea.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '192.168.50.150' (ECDSA) to the list of known hosts.
root@192.168.50.150's password:
token.csv 100% 84 32.6KB/s 00:00
kube-apiserver 100% 934 115.9KB/s 00:00
kube-scheduler 100% 94 20.4KB/s 00:00
kube-controller-manager 100% 483 127.8KB/s 00:00
kube-apiserver 100% 184MB 45.9MB/s 00:04
kubectl 100% 55MB 54.7MB/s 00:01
kube-controller-manager 100% 155MB 54.2MB/s 00:02
kube-scheduler 100% 55MB 57.0MB/s 00:00
ca-key.pem 100% 1679 1.4MB/s 00:00
ca.pem 100% 1359 975.3KB/s 00:00
server-key.pem 100% 1679 491.8KB/s 00:00
server.pem 100% 1643 455.7KB/s 00:00 //复制master中的三个组件启动脚本kube-apiserver.service kube-controller-manager.service kube-scheduler.service
[root@localhost k8s]# scp /usr/lib/systemd/system/{kube-apiserver,kube-controller-manager,kube-scheduler}.service root@192.168.50.150:/usr/lib/systemd/system/
root@192.168.50.150's password:
kube-apiserver.service 100% 282 253.0KB/s 00:00
kube-controller-manager.service 100% 317 257.6KB/s 00:00
kube-scheduler.service 100% 281 112.3KB/s 00:00
master02上操作
修改配置文件kube-apiserver中的IP
–bind-address=192.168.50.150
–advertise-address=192.168.50.150
[root@localhost ~]# cd /opt/kubernetes/cfg/
[root@localhost cfg]# vim kube-apiserver
KUBE_APISERVER_OPTS="--logtostderr=true \
--v=4 \
--etcd-servers=https://192.168.195.149:2379,https://192.168.195.150:2379,https://192.168.195.151:2379 \
--bind-address=192.168.50.150 \
--secure-port=6443 \
--advertise-address=192.168.50.150 \
--allow-privileged=true \
--service-cluster-ip-range=10.0.0.0/24 \
--enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,ResourceQuota,NodeRestriction \
--authorization-mode=RBAC,Node \
--kubelet-https=true \
--enable-bootstrap-token-auth \
--token-auth-file=/opt/kubernetes/cfg/token.csv \
--service-node-port-range=30000-50000 \
--tls-cert-file=/opt/kubernetes/ssl/server.pem \
--tls-private-key-file=/opt/kubernetes/ssl/server-key.pem \
--client-ca-file=/opt/kubernetes/ssl/ca.pem \
--service-account-key-file=/opt/kubernetes/ssl/ca-key.pem \
--etcd-cafile=/opt/etcd/ssl/ca.pem \
--etcd-certfile=/opt/etcd/ssl/server.pem \
--etcd-keyfile=/opt/etcd/ssl/server-key.pem"
[root@localhost k8s]# scp -r /opt/etcd/ root@192.168.50.150:/opt/
root@192.168.50.150's password:
etcd 100% 516 16.3KB/s 00:00
etcd 100% 18MB 56.0MB/s 00:00
etcdctl 100% 15MB 45.6MB/s 00:00
ca-key.pem 100% 1675 480.5KB/s 00:00
ca.pem 100% 1265 523.0KB/s 00:00
server-key.pem 100% 1679 1.6MB/s 00:00
server.pem 100% 1338 1.0MB/s 00:00
启动master02中的三个组件服务
[root@localhost cfg]# systemctl start kube-apiserver.service
[root@localhost cfg]# systemctl start kube-controller-manager.service
[root@localhost cfg]# systemctl start kube-scheduler.service
增加环境变量
[root@localhost cfg]# vim /etc/profile
#末尾添加
export PATH=$PATH:/opt/kubernetes/bin/
[root@localhost cfg]# source /etc/profile
master2查看群集中的节点
[root@localhost cfg]# kubectl get node
NAME STATUS ROLES AGE VERSION
192.168.50.140 Ready <none> 2d12h v1.12.3
192.168.50.141 Ready <none> 38h v1.12.3
| lb1（192.168.50.142/24） |
|---|
| lb2（192.168.50.143/24） |
| VIP （192.168.50.100/24） |
lb01 lb02部署：
安装nginx服务，把nginx.sh和keepalived.conf脚本拷贝到家目录
[root@localhost ~]# systemctl stop firewalld.service
[root@localhost ~]# setenforce 0
[root@localhost ~]# vim /etc/yum.repos.d/nginx.repo
[nginx]
name=nginx repo
baseurl=http://nginx.org/packages/centos/7/$basearch/
gpgcheck=0
[root@localhost ~]# yum install nginx -y
//添加四层转发
[root@localhost ~]# vim /etc/nginx/nginx.conf
events {
worker_connections 1024;
}
#将stream模块添加进去
stream {
log_format main '$remote_addr $upstream_addr - [$time_local] $status $upstream_bytes_sent';
access_log /var/log/nginx/k8s-access.log main;
upstream k8s-apiserver {
server 192.168.50.139:6443;
server 192.168.50.150:6443;
}
server {
listen 6443;
proxy_pass k8s-apiserver;
}
}
http {
[root@localhost ~]# systemctl start nginx
部署keepalived服务
[root@localhost ~]# yum install keepalived -y
//修改配置文件
[root@localhost ~]# cp keepalived.conf /etc/keepalived/keepalived.conf
cp：是否覆盖"/etc/keepalived/keepalived.conf"？ yes
//注意：lb01是Mster配置如下：
! Configuration File for keepalived
global_defs {
# 接收邮件地址
notification_email {
acassen@firewall.loc
failover@firewall.loc
sysadmin@firewall.loc
}
# 邮件发送地址
notification_email_from Alexandre.Cassen@firewall.loc
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id NGINX_MASTER
}
vrrp_script check_nginx {
script "/etc/nginx/check_nginx.sh"
}
vrrp_instance VI_1 {
state MASTER
interface ens33
virtual_router_id 51 # VRRP 路由 ID实例，每个实例是唯一的
priority 100 # 优先级，备服务器设置 90
advert_int 1 # 指定VRRP 心跳包通告间隔时间，默认1秒
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.50.100/24
}
track_script {
check_nginx
}
}
//注意：lb02是Backup配置如下：
! Configuration File for keepalived
global_defs {
# 接收邮件地址
notification_email {
acassen@firewall.loc
failover@firewall.loc
sysadmin@firewall.loc
}
# 邮件发送地址
notification_email_from Alexandre.Cassen@firewall.loc
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id NGINX_MASTER
}
vrrp_script check_nginx {
script "/etc/nginx/check_nginx.sh"
}
vrrp_instance VI_1 {
state BACKUP
interface ens33
virtual_router_id 51 # VRRP 路由 ID实例，每个实例是唯一的
priority 90 # 优先级，备服务器设置 90
advert_int 1 # 指定VRRP 心跳包通告间隔时间，默认1秒
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.50.100/24
}
track_script {
check_nginx
}
}
[root@localhost ~]# vim /etc/nginx/check_nginx.sh
count=$(ps -ef |grep nginx |egrep -cv "grep|$$")
if [ "$count" -eq 0 ];then
systemctl stop keepalived
fi
[root@localhost ~]# chmod +x /etc/nginx/check_nginx.sh
[root@localhost ~]# systemctl start keepalived
[root@localhost ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:1a:6f:51 brd ff:ff:ff:ff:ff:ff
inet 192.168.50.142/24 brd 192.168.50.255 scope global ens33
valid_lft forever preferred_lft forever
inet 192.168.50.100/24 scope global secondary ens33
valid_lft forever preferred_lft forever
inet6 fe80::d324:6059:c2f2:4f94/64 scope link tentative dadfailed
valid_lft forever preferred_lft forever
inet6 fe80::75c0:73c1:af3e:a5c5/64 scope link tentative dadfailed
valid_lft forever preferred_lft forever
inet6 fe80::cea:108:8cd9:1808/64 scope link tentative dadfailed
valid_lft forever preferred_lft forever
[root@localhost nginx]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:42:6e:1d brd ff:ff:ff:ff:ff:ff
inet 192.168.50.143/24 brd 192.168.50.255 scope global ens33
valid_lft forever preferred_lft forever
inet6 fe80::d324:6059:c2f2:4f94/64 scope link tentative dadfailed
valid_lft forever preferred_lft forever
inet6 fe80::75c0:73c1:af3e:a5c5/64 scope link tentative dadfailed
valid_lft forever preferred_lft forever
inet6 fe80::cea:108:8cd9:1808/64 scope link tentative dadfailed
valid_lft forever preferred_lft forever
//验证地址漂移（lb01中使用pkill nginx，再在lb02中使用ip a 查看）
//恢复操作（在lb01中先启动nginx服务，再启动keepalived服务）
//nginx站点/usr/share/nginx/html
开始修改node节点配置文件统一VIP（bootstrap.kubeconfig,kubelet.kubeconfig）
[root@localhost cfg]# vim /opt/kubernetes/cfg/bootstrap.kubeconfig
[root@localhost cfg]# vim /opt/kubernetes/cfg/kubelet.kubeconfig
[root@localhost cfg]# vim /opt/kubernetes/cfg/kube-proxy.kubeconfig
//统统修改为VIP
server: https://192.168.50.100:6443
[root@localhost cfg]# systemctl restart kubelet.service
[root@localhost cfg]# systemctl restart kube-proxy.service
//替换完成直接自检
[root@localhost cfg]# grep 100 *
bootstrap.kubeconfig: server: https://192.168.50.100:6443
kubelet.kubeconfig: server: https://192.168.50.100:6443
kube-proxy.kubeconfig: server: https://192.168.50.100:6443
在lb01上查看nginx的k8s日志
[root@localhost ~]# tail /var/log/nginx/k8s-access.log
192.168.50.141 192.168.50.139:6443 - [09/Feb/2020:11:18:41 +0800] 200 1120
192.168.50.141 192.168.50.150:6443 - [09/Feb/2020:11:18:41 +0800] 200 1120
192.168.50.140 192.168.50.139:6443 - [09/Feb/2020:11:18:56 +0800] 200 1120
192.168.50.140 192.168.50.139:6443 - [09/Feb/2020:11:18:56 +0800] 200 1120
在master01上操作
//测试创建pod
[root@localhost ~]# kubectl run nginx --image=nginx
kubectl run --generator=deployment/apps.v1beta1 is DEPRECATED and will be removed in a future version. Use kubectl create instead.
deployment.apps/nginx created
//查看状态
[root@localhost ~]# kubectl get pods
NAME READY STATUS RESTARTS AGE
nginx-dbddb74b8-nf9sk 0/1 ContainerCreating 0 33s //正在创建中
[root@localhost ~]# kubectl get pods
NAME READY STATUS RESTARTS AGE
nginx-dbddb74b8-hhkfm 1/1 Running 0 28s //创建完成，运行中
//注意日志问题
[root@localhost ~]# kubectl logs nginx-dbddb74b8-hhkfm
[root@localhost ~]# kubectl create clusterrolebinding cluster-system-anonymous --clusterrole=cluster-admin --user=system:anonymous
clusterrolebinding.rbac.authorization.k8s.io/cluster-system-anonymous created
查看pod网络
[root@localhost ~]# kubectl get pods -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE
nginx-dbddb74b8-hhkfm 1/1 Running 0 2m36s 172.17.0.2 192.168.50.141 <none>
在对应网段的node（192.168.50.141）节点上操作可以直接访问
[root@localhost cfg]# curl 172.17.0.2
<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
<style>
body {
width: 35em;
margin: 0 auto;
font-family: Tahoma, Verdana, Arial, sans-serif;
}
</style>
</head>
<body>
<h1>Welcome to nginx!</h1>
<p>If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.</p>
<p>For online documentation and support please refer to
<a href="http://nginx.org/">nginx.org</a>.<br/>
Commercial support is available at
<a href="http://nginx.com/">nginx.com</a>.</p>
<p><em>Thank you for using nginx.</em></p>
</body>
</html>
master01查看日志
[root@localhost ~]# kubectl logs nginx-dbddb74b8-hhkfm
172.17.0.1 - - [09/Feb/2020:03:29:10 +0000] "GET / HTTP/1.1" 200 612 "-" "curl/7.29.0" "-"