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Kubernetes二进制部署之多节点部署

发布时间：2020-08-11 08:50:19 来源：网络 阅读：102 作者：wx5d2c2cbaaf223 栏目：云计算

此实验开始前必须要先部署单节master的k8s群集

单节点部署博客地址：
https://blog.51cto.com/14449528/2469980

多master群集架构图：

Kubernetes二进制部署之多节点部署

master2部署

1、优先关闭master2的防火墙服务

[root@master2 ~]# systemctl stop firewalld.service
[root@master2 ~]# setenforce 0

2、在master1上操作，复制kubernetes目录、server组件到master2

[root@master1 k8s]# scp -r /opt/kubernetes/ root@192.168.18.140:/opt
[root@master1 k8s]# scp /usr/lib/systemd/system/{kube-apiserver,kube-controller-manager,kube-scheduler}.service root@192.168.18.140:/usr/lib/systemd/system/

3、修改master02中的配置文件

[root@master2 ~]# cd /opt/kubernetes/cfg/
[root@master2 cfg]# vim kube-apiserver
5 --bind-address=192.168.18.140 \
7 --advertise-address=192.168.18.140 \
#第5和7行IP地址需要改为master2的地址

4、拷贝master1上已有的etcd证书给master2使用

（注意：master2一定要有etcd证书，否则apiserver服务无法启动）

[root@master1 k8s]# scp -r /opt/etcd/ root@192.168.18.132:/opt/
root@192.168.18.132's password:
etcd                                                      100%  516   535.5KB/s   00:00
etcd                                                      100%   18MB  90.6MB/s   00:00
etcdctl                                                   100%   15MB  80.5MB/s   00:00
ca-key.pem                                                100% 1675     1.4MB/s   00:00
ca.pem                                                    100% 1265   411.6KB/s   00:00
server-key.pem                                            100% 1679     2.0MB/s   00:00
server.pem                                                100% 1338   429.6KB/s   00:00

5、启动master2中的三个组件服务

[root@master2 cfg]# systemctl start kube-apiserver.service        ##开启服务
[root@master2 cfg]# systemctl enable kube-apiserver.service    ##服务开机自启
[root@master2 cfg]# systemctl start kube-controller-manager.service
[root@master2 cfg]# systemctl enable kube-controller-manager.service
[root@master2 cfg]# systemctl start kube-scheduler.service
[root@master2 cfg]# systemctl enable kube-scheduler.service

6、修改环境变量

[root@master2 cfg]# vim /etc/profile
export PATH=$PATH:/opt/kubernetes/bin/  ##添加环境变量
[root@master2 cfg]# source /etc/profile      ##刷新配置文件
[root@master2 cfg]# kubectl get node        ##查看群集节点信息
NAME             STATUS   ROLES    AGE   VERSION
192.168.18.129   Ready    <none>   21h   v1.12.3
192.168.18.130   Ready    <none>   22h   v1.12.3
#此时可以看到node1和node2的加入情况

------此时master2部署完毕------

Nginx负载均衡部署

lb01和lb02进行相同操作

安装nginx服务，把nginx.sh和keepalived.conf脚本拷贝到家目录

[root@localhost ~]# ls
anaconda-ks.cfg       keepalived.conf  公共  视频  文档  音乐
initial-setup-ks.cfg  nginx.sh         模板  图片  下载  桌面
[root@lb1 ~]# systemctl stop firewalld.service
[root@lb1 ~]# setenforce 0
[root@lb1 ~]# vim /etc/yum.repos.d/nginx.repo
[nginx]
name=nginx repo
baseurl=http://nginx.org/packages/centos/7/$basearch/
gpgcheck=0
##重新加载yum仓库
[root@lb1 ~]# yum list
##安装nginx服务
[root@lb1 ~]# yum install nginx -y

[root@lb1 ~]# vim /etc/nginx/nginx.conf
##在12行下插入stream模块
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 192.168.18.128:6443;     #此处为master1的ip地址
        server 192.168.18.140:6443;     #此处为master2的ip地址
    }
    server {
                listen 6443;
                proxy_pass k8s-apiserver;
    }
    }

##检测语法
[root@lb1 ~]# nginx -t
nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
nginx: configuration file /etc/nginx/nginx.conf test is successful
##修改主页进行区分
[root@lb1 ~]# cd /usr/share/nginx/html/
[root@lb1 html]# ls
50x.html  index.html
[root@lb1 html]# vim index.html
14 <h2>Welcome to mater nginx!</h2>     #14行中添加master以作区分
[root@lb2 ~]# cd /usr/share/nginx/html/
[root@lb2 html]# ls
50x.html  index.html
[root@lb1 html]# vim index.html
14 <h2>Welcome to backup nginx!</h2>        #14行中添加backup以作区分

##启动服务
[root@lb1 ~]# systemctl start nginx
[root@lb2 ~]# systemctl start nginx

浏览器验证访问，输入192.168.18.150，可以访问master的nginx主页
Kubernetes二进制部署之多节点部署

浏览器验证访问，输入192.168.18.151，可以访问backup的nginx主页
Kubernetes二进制部署之多节点部署

keepalived安装部署

lb01和lb02操作相同

1、安装keeplived

[root@lb1 html]# yum install keepalived -y

2、修改配置文件

[root@lb1~]# ls
anaconda-ks.cfg       keepalived.conf  公共  视频  文档  音乐
initial-setup-ks.cfg  nginx.sh         模板  图片  下载  桌面
[root@lb1 ~]# cp keepalived.conf /etc/keepalived/keepalived.conf
cp：是否覆盖"/etc/keepalived/keepalived.conf"？ yes

[root@lb1 ~]# vim /etc/keepalived/keepalived.conf 
#lb01是Master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 {
        192.168.18.100/24
    }
    track_script {
        check_nginx
    }
}

#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 {
        192.168.18.100/24
    }
    track_script {
        check_nginx
    }
}

3、制作管理脚本

[root@lb1 ~]# vim /etc/nginx/check_nginx.sh

count=$(ps -ef |grep nginx |egrep -cv "grep|$$")

if [ "$count" -eq 0 ];then
        systemctl stop keepalived
fi

4、赋予执行权限并开启服务

[root@lb1 ~]# chmod +x /etc/nginx/check_nginx.sh
[root@lb1 ~]# systemctl start keepalived

5、查看地址信息
lb01地址信息

[root@lb1 ~]# 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:ba:e6:18 brd ff:ff:ff:ff:ff:ff
    inet 192.168.18.150/24 brd 192.168.35.255 scope global ens33
       valid_lft forever preferred_lft forever
    inet 192.168.18.100/24 scope global secondary ens33             ##漂移地址在lb01中 
       valid_lft forever preferred_lft forever
    inet6 fe80::6ec5:6d7:1b18:466e/64 scope link tentative dadfailed 
       valid_lft forever preferred_lft forever
    inet6 fe80::2a3:b621:ca01:463e/64 scope link tentative dadfailed 
       valid_lft forever preferred_lft forever
    inet6 fe80::d4e2:ef9e:6820:145a/64 scope link tentative dadfailed 
       valid_lft forever preferred_lft forever
3: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN qlen 1000
    link/ether 52:54:00:14:39:99 brd ff:ff:ff:ff:ff:ff
    inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
       valid_lft forever preferred_lft forever
4: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast master virbr0 state DOWN qlen 1000
    link/ether 52:54:00:14:39:99 brd ff:ff:ff:ff:ff:ff

lb02地址信息

[root@lb2 ~]# 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:29:1d:ec:b0 brd ff:ff:ff:ff:ff:ff
    inet 192.168.18.151/24 brd 192.168.35.255 scope global ens33
       valid_lft forever preferred_lft forever
    inet6 fe80::6ec5:6d7:1b18:466e/64 scope link tentative dadfailed 
       valid_lft forever preferred_lft forever
    inet6 fe80::2a3:b621:ca01:463e/64 scope link tentative dadfailed 
       valid_lft forever preferred_lft forever
    inet6 fe80::d4e2:ef9e:6820:145a/64 scope link tentative dadfailed 
       valid_lft forever preferred_lft forever
3: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN qlen 1000
    link/ether 52:54:00:14:39:99 brd ff:ff:ff:ff:ff:ff
    inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
       valid_lft forever preferred_lft forever
4: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast master virbr0 state DOWN qlen 1000
    link/ether 52:54:00:14:39:99 brd ff:ff:ff:ff:ff:ff

6、测试故障时转移切换
使Ib01故障，验证地址漂移

[root@lb1 ~]# pkill nginx
[root@lb1 ~]# systemctl status nginx
● nginx.service - nginx - high performance web server
   Loaded: loaded (/usr/lib/systemd/system/nginx.service; disabled; vendor preset: disabled)
   Active: failed (Result: exit-code) since 六 2020-02-08 16:54:45 CST; 11s ago
     Docs: http://nginx.org/en/docs/
  Process: 13156 ExecStop=/bin/kill -s TERM $MAINPID (code=exited, status=1/FAILURE)
 Main PID: 6930 (code=exited, status=0/SUCCESS)
 [root@localhost ~]# systemctl status keepalived.service             #keepalived服务也随之关闭，说明nginx中的check_nginx.sh生效
● keepalived.service - LVS and VRRP High Availability Monitor
   Loaded: loaded (/usr/lib/systemd/system/keepalived.service; disabled; vendor preset: disabled)
   Active: inactive (dead)

查看Ib01地址：

[root@lb1 ~]# 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:ba:e6:18 brd ff:ff:ff:ff:ff:ff
    inet 192.168.18.150/24 brd 192.168.35.255 scope global ens33
       valid_lft forever preferred_lft forever
    inet6 fe80::6ec5:6d7:1b18:466e/64 scope link tentative dadfailed 
       valid_lft forever preferred_lft forever
    inet6 fe80::2a3:b621:ca01:463e/64 scope link tentative dadfailed 
       valid_lft forever preferred_lft forever
    inet6 fe80::d4e2:ef9e:6820:145a/64 scope link tentative dadfailed 
       valid_lft forever preferred_lft forever
3: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN qlen 1000
    link/ether 52:54:00:14:39:99 brd ff:ff:ff:ff:ff:ff
    inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
       valid_lft forever preferred_lft forever
4: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast master virbr0 state DOWN qlen 1000
    link/ether 52:54:00:14:39:99 brd ff:ff:ff:ff:ff:ff

查看Ib02地址：

[root@Ib2 ~]# 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:29:1d:ec:b0 brd ff:ff:ff:ff:ff:ff
    inet 192.168.18.151/24 brd 192.168.35.255 scope global ens33
       valid_lft forever preferred_lft forever
    inet 192.168.18.100/24 scope global secondary ens33                #漂移地址转移到lb02中
       valid_lft forever preferred_lft forever
    inet6 fe80::6ec5:6d7:1b18:466e/64 scope link tentative dadfailed 
       valid_lft forever preferred_lft forever
    inet6 fe80::2a3:b621:ca01:463e/64 scope link tentative dadfailed 
       valid_lft forever preferred_lft forever
    inet6 fe80::d4e2:ef9e:6820:145a/64 scope link tentative dadfailed 
       valid_lft forever preferred_lft forever
3: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN qlen 1000
    link/ether 52:54:00:14:39:99 brd ff:ff:ff:ff:ff:ff
    inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
       valid_lft forever preferred_lft forever
4: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast master virbr0 state DOWN qlen 1000
    link/ether 52:54:00:14:39:99 brd ff:ff:ff:ff:ff:ff

恢复操作，在Ib01中先后启动nginx服务与keepalived服务

[root@localhost ~]# systemctl start nginx
[root@localhost ~]# systemctl start keepalived.service 
[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:ba:e6:18 brd ff:ff:ff:ff:ff:ff
    inet 192.168.35.104/24 brd 192.168.35.255 scope global ens33
       valid_lft forever preferred_lft forever
    inet 192.168.35.200/24 scope global secondary ens33               #漂移地址又转移回lb01中
       valid_lft forever preferred_lft forever
    inet6 fe80::6ec5:6d7:1b18:466e/64 scope link tentative dadfailed 
       valid_lft forever preferred_lft forever
    inet6 fe80::2a3:b621:ca01:463e/64 scope link tentative dadfailed 
       valid_lft forever preferred_lft forever
    inet6 fe80::d4e2:ef9e:6820:145a/64 scope link tentative dadfailed 
       valid_lft forever preferred_lft forever
3: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN qlen 1000
    link/ether 52:54:00:14:39:99 brd ff:ff:ff:ff:ff:ff
    inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
       valid_lft forever preferred_lft forever
4: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast master virbr0 state DOWN qlen 1000
    link/ether 52:54:00:14:39:99 brd ff:ff:ff:ff:ff:ff

因为漂移地址是在lb01上，所以访问漂移地址时现实的nginx首页应该是包含master的
Kubernetes二进制部署之多节点部署

node节点绑定VIP地址

1、修改node节点配置文件统一VIP

[root@localhost ~]# vim /opt/kubernetes/cfg/bootstrap.kubeconfig
[root@localhost ~]# vim /opt/kubernetes/cfg/kubelet.kubeconfig
[root@localhost ~]# vim /opt/kubernetes/cfg/kube-proxy.kubeconfig

#全部都改为VIP地址

server: https://192.168.18.100:6443

2、替换完成直接自检并重启服务

[root@node1 ~]# cd /opt/kubernetes/cfg/
[root@node1 cfg]# grep 100 *
bootstrap.kubeconfig:    server: https://192.168.18.100:6443
kubelet.kubeconfig:    server: https://192.168.18.100:6443
kube-proxy.kubeconfig:    server: https://192.168.18.100:6443

[root@node1 cfg]# systemctl restart kubelet.service
[root@node1 cfg]# systemctl restart kube-proxy.service

3、在lb01上查看nginx的k8s日志

[root@lb1 ~]# tail /var/log/nginx/k8s-access.log
192.168.18.130 192.168.18.128:6443 - [07/Feb/2020:14:18:54 +0800] 200 1119
192.168.18.130 192.168.18.140:6443 - [07/Feb/2020:14:18:54 +0800] 200 1119
192.168.18.129 192.168.18.128:6443 - [07/Feb/2020:14:18:57 +0800] 200 1120
192.168.18.129 192.168.18.140:6443 - [07/Feb/2020:14:18:57 +0800] 200 1120

4、在master1上操作

#测试创建pod
[root@master1 ~]# 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@master1 ~]# kubectl get pods
NAME                    READY   STATUS              RESTARTS   AGE
nginx-dbddb74b8-7hdfj   0/1     ContainerCreating   0          32s
#此时状态为ContainerCreating正在创建中

[root@master1 ~]# kubectl get pods
NAME                    READY   STATUS    RESTARTS   AGE
nginx-dbddb74b8-7hdfj   1/1     Running   0          73s
#此时状态为Running，表示创建完成，运行中

#注意：日志问题
[root@master1 ~]# kubectl logs nginx-dbddb74b8-7hdfj
Error from server (Forbidden): Forbidden (user=system:anonymous, verb=get, resource=nodes, subresource=proxy) ( pods/log nginx-dbddb74b8-7hdfj)
#此时日志不可看，需要开启权限

#绑定群集中的匿名用户赋予管理员权限
[root@master1 ~]# kubectl create clusterrolebinding cluster-system-anonymous --clusterrole=cluster-admin --user=system:anonymous
clusterrolebinding.rbac.authorization.k8s.io/cluster-system-anonymous created
[root@master1 ~]# kubectl logs nginx-dbddb74b8-7hdfj        #此时就不会报错了

查看pod网络#
[root@master1 ~]# kubectl get pods -o wide
NAME                  READY     STATUS    RESTARTS   AGE      IP            NODE         NOMINATED NODE
nginx-dbddb74b8-7hdfj   1/1     Running   0          20m   172.17.32.2   192.168.18.129  <none>

5、在对应网段的node1节点上操作可以直接访问

[root@node1 ~]# curl 172.17.32.2
<!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>
<h2>Welcome to nginx!</h2>
<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>
#此时看到的就是容器中nginx的信息

访问就会产生日志，我们就可以回到master1上查看日志

[root@master1 ~]# kubectl logs nginx-dbddb74b8-7hdfj
172.17.32.1 - - [07/Feb/2020:06:52:53 +0000] "GET / HTTP/1.1" 200 612 "-" "curl/7.29.0" "-"
#此时就可以看到node1使用网关（172.17.32.1）进行访问的记录
向AI问一下细节
推荐阅读：
  1. Kubernetes集群node节点的部署
  2. Kubernetes二进制部署——负载均衡部署（3）

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