kubernetes二进制负载均衡部署如何实现

发布时间：2020-04-16 16:01:08 作者：三月
来源：亿速云阅读：352

下文给大家带来kubernetes二进制负载均衡部署如何实现，希望能够给大家在实际运用中带来一定的帮助，负载均衡涉及的东西比较多，理论也不多，网上有很多书籍，今天我们就用亿速云在行业内累计的经验来做一个解答。

实验环境：

负载均衡
Nginx1:192.168.35.104/24
Nginx2:192.168.35.105/24

Master节点
master1:192.168.35.100/24
master2:192.168.35.103/24

Node节点
node1：192.168.35.101/24
node2：192.168.35.102/24

nginx安装部署

lb01和lb02操作

1、关闭防火墙

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

2、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

3、构建nginx的yum源环境

（1）复制配置文件

[root@localhost ~]# vim nginx.sh

cat > /etc/yum.repos.d/nginx.repo << EOF
[nginx]
name=nginx repo
baseurl=http://nginx.org/packages/centos/7/$basearch/
gpgcheck=0                                    #复制四行内容
EOF

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 10.0.0.3:6443;
        server 10.0.0.8:6443;
    }
    server {
                listen 6443;
                proxy_pass k8s-apiserver;
    }
    }

（2）创建yum源，重新加载yum仓库，并安装nginx

[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 list

[root@localhost ~]# yum install nginx -y

4、添加四层转发

（1）复制配置文件

[root@localhost ~]# vim nginx.sh

cat > /etc/yum.repos.d/nginx.repo << EOF
[nginx]
name=nginx repo
baseurl=http://nginx.org/packages/centos/7/$basearch/
gpgcheck=0                                   
EOF

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 10.0.0.3:6443;
        server 10.0.0.8:6443;
    }
    server {
                listen 6443;
                proxy_pass k8s-apiserver;
    }
    }                          #复制此段内容

（2）添加配置文件并修改

[root@localhost ~]# vim /etc/nginx/nginx.conf

user  nginx;
worker_processes  1;

error_log  /var/log/nginx/error.log warn;
pid        /var/run/nginx.pid;

events {
    worker_connections  1024;
}

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 192.168.35.100:6443;
        server 192.168.35.103:6443;                  #只需修改IP为master1和master2的地址      
    }
    server {
                listen 6443;
                proxy_pass k8s-apiserver;
    }
    }

http {
    include       /etc/nginx/mime.types;
    default_type  application/octet-stream;

    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';

    access_log  /var/log/nginx/access.log  main;

    sendfile        on;
    #tcp_nopush     on;

    keepalive_timeout  65;

    #gzip  on;

    include /etc/nginx/conf.d/*.conf;
}

（3）验证语法是否错误

[root@localhost ~]# nginx -t
nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
nginx: configuration file /etc/nginx/nginx.conf test is successful

（4）修改首页，进行区分，一个master，一个backup。

lb01操作：

[root@localhost ~]# cd /usr/share/nginx/html/
[root@localhost html]# ls
50x.html  index.html
[root@localhost html]# vim index.html 

/14 <h3>Welcome to master ginx!</h3>

lb02操作：

[root@localhost ~]# cd /usr/share/nginx/html/
[root@localhost html]# ls
50x.html  index.html
[root@localhost html]# vim index.html 

/14 <h3>Welcome to backup ginx!</h3>

（5）开启服务，并访问首页

lb01：

[root@localhost ~]# systemctl start nginx

用浏览器访问http://192.168.35.104/

kubernetes二进制负载均衡部署如何实现

lb02：

[root@localhost ~]# systemctl start nginx

用浏览器访问http://192.168.35.105/

kubernetes二进制负载均衡部署如何实现

keepalived安装部署

lb01和lb02操作：

1、安装keepalived

[root@localhost ~]# yum install keepalived -y

2、修改配置文件

[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@localhost ~]# cp keepalived.conf /etc/keepalived/keepalived.conf
cp：是否覆盖"/etc/keepalived/keepalived.conf"？ yes

[root@localhost ~]# 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 {
        192.168.35.200/24
    }
    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 {
        192.168.35.200/24
    }
    track_script {
        check_nginx
    }
}

3、制作管理脚本

[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

4、赋予执行权限并开启服务

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

5、查看地址信息

（1）查看lb01地址信息

[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

（2）查看lb02地址信息

[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:29:1d:ec:b0 brd ff:ff:ff:ff:ff:ff
    inet 192.168.35.105/24 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、测试故障转移切换

（1）验证地址漂移（lb01中使用pkill nginx，再在lb02中使用ip a 查看）

[root@localhost ~]# pkill nginx
[root@localhost ~]# 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)

2月 08 16:54:45 localhost.localdomain kill[13156]: -q, --queue <信号>   …2)
2月 08 16:54:45 localhost.localdomain kill[13156]: -p, --pid            …号
2月 08 16:54:45 localhost.localdomain kill[13156]: -l, --list [=<信号>] …称
2月 08 16:54:45 localhost.localdomain kill[13156]: -L, --table          …值
2月 08 16:54:45 localhost.localdomain kill[13156]: -h, --help     显示此…出
2月 08 16:54:45 localhost.localdomain kill[13156]: -V, --version  输出版…出
2月 08 16:54:45 localhost.localdomain kill[13156]: 更多信息请参阅 kill(1)。
2月 08 16:54:45 localhost.localdomain systemd[1]: nginx.service: control...
2月 08 16:54:45 localhost.localdomain systemd[1]: Unit nginx.service ent...
2月 08 16:54:45 localhost.localdomain systemd[1]: nginx.service failed.
Hint: Some lines were ellipsized, use -l to show in full.

[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)

2月 08 16:39:26 localhost.localdomain Keepalived_vrrp[7319]: VRRP_Instan...
2月 08 16:39:26 localhost.localdomain Keepalived_vrrp[7319]: Sending gra...
2月 08 16:39:26 localhost.localdomain Keepalived_vrrp[7319]: Sending gra...
2月 08 16:39:26 localhost.localdomain Keepalived_vrrp[7319]: Sending gra...
2月 08 16:39:26 localhost.localdomain Keepalived_vrrp[7319]: Sending gra...
2月 08 16:54:46 localhost.localdomain Keepalived[7317]: Stopping
2月 08 16:54:46 localhost.localdomain systemd[1]: Stopping LVS and VRRP ...
2月 08 16:54:46 localhost.localdomain Keepalived_vrrp[7319]: VRRP_Instan...
2月 08 16:54:46 localhost.localdomain Keepalived_vrrp[7319]: VRRP_Instan...
2月 08 16:54:47 localhost.localdomain systemd[1]: Stopped LVS and VRRP H...
Hint: Some lines were ellipsized, use -l to show in full.

在lb01查看地址：

[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
    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

在lb02查看地址：

[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:29:1d:ec:b0 brd ff:ff:ff:ff:ff:ff
    inet 192.168.35.105/24 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

（2）恢复操作（在lb01中先启动nginx服务，再启动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

（3）nginx站点/usr/share/nginx/html

在宿主机上ping虚拟IP，保证可以ping通，说明可以去进行访问

kubernetes二进制负载均衡部署如何实现

在lb01查看index.html

[root@localhost ~]# cat /usr/share/nginx/html/index.html 
<!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>
<h3>Welcome to master ginx!</h3>
<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>

在lb01查看index.html

[root@localhost ~]# cat /usr/share/nginx/html/index.html 
<!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>
<h3>Welcome to backup nginx!</h3>
<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>

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二进制负载均衡部署如何实现

node节点绑定VIP地址

1、修改node节点配置文件统一VIP（bootstrap.kubeconfig,kubelet.kubeconfig）

[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://192.168.35.200:6443

2、替换完成直接自检

[root@localhost ~]# cd /opt/kubernetes/cfg/

[root@localhost cfg]# grep 200 *
bootstrap.kubeconfig:    server: https://192.168.35.200:6443
kubelet.kubeconfig:    server: https://192.168.35.200:6443
kube-proxy.kubeconfig:    server: https://192.168.35.200:6443

3、重启服务

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

4、在lb01上查看nginx的k8s日志

[root@localhost ~]# tail /var/log/nginx/k8s-access.log
192.168.35.102 192.168.35.100:6443 - [08/Feb/2020:17:42:00 +0800] 200 1119
192.168.35.102 192.168.35.103:6443 - [08/Feb/2020:17:42:00 +0800] 200 1121
192.168.35.101 192.168.35.100:6443 - [08/Feb/2020:17:42:14 +0800] 200 1121
192.168.35.101 192.168.35.100:6443 - [08/Feb/2020:17:42:14 +0800] 200 1121

在master01上操作

1、测试创建pod

[root@localhost k8s]# 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

2、查看状态

[root@localhost k8s]# kubectl get pods
NAME                    READY   STATUS    RESTARTS   AGE
nginx-dbddb74b8-cfggf   1/1        0     ContainerCreating     64s                #正在创建中
[root@localhost k8s]# kubectl get pods
NAME                    READY   STATUS    RESTARTS   AGE
nginx-dbddb74b8-cfggf   1/1     Running   0          74s                   #创建完成，运行中

3、注意日志问题（无法查看，会报错）

[root@localhost k8s]# kubectl logs nginx-dbddb74b8-cfggf
Error from server (Forbidden): Forbidden (user=system:anonymous, verb=get, resource=nodes, subresource=proxy) ( pods/log nginx-dbddb74b8-cfggf)

解决办法：

（1）权限提升

[root@localhost k8s]# kubectl create clusterrolebinding cluster-system-anonymous --clusterrole=cluster-admin --user=system:anonymous
clusterrolebinding.rbac.authorization.k8s.io/cluster-system-anonymous created

（2）在去进行日志查看

[root@localhost k8s]# kubectl logs nginx-dbddb74b8-cfggf

//并不会出现报错，只是因为没有去访问，所以没有产生日志

4、查看pod网络

[root@localhost k8s]# kubectl get pods -o wide
NAME                    READY   STATUS    RESTARTS   AGE   IP            NODE             NOMINATED NODE
nginx-dbddb74b8-cfggf   1/1     Running   0          14m   172.17.45.2   192.168.35.101   <none>

5、在对应网段的node节点上操作可以直接访问

[root@localhost cfg]# curl 172.17.45.2
<!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>
<h3>Welcome to nginx!</h3>
<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>

6、访问就会产生日志，回到master01操作

[root@localhost k8s]# kubectl logs nginx-dbddb74b8-cfggf

172.17.45.1 - - [08/Feb/2020:10:10:29 +0000] "GET / HTTP/1.1" 200 612 "-" "curl/7.29.0" "-"

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kubernetes二进制负载均衡部署如何实现

实验环境：

nginx安装部署

lb01和lb02操作

1、关闭防火墙

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

3、构建nginx的yum源环境

（1）复制配置文件

（2）创建yum源，重新加载yum仓库，并安装nginx

4、添加四层转发

（1）复制配置文件

（2）添加配置文件并修改

（3）验证语法是否错误

（4）修改首页，进行区分，一个master，一个backup。

lb01操作：

lb02操作：

（5）开启服务，并访问首页

lb01：

用浏览器访问http://192.168.35.104/

lb02：

用浏览器访问http://192.168.35.105/

keepalived安装部署

lb01和lb02操作：

1、安装keepalived

2、修改配置文件

lb01是Master配置如下：

lb02是Backup配置如下：

3、制作管理脚本

4、赋予执行权限并开启服务

5、查看地址信息

（1）查看lb01地址信息

（2）查看lb02地址信息

6、测试故障转移切换

（1）验证地址漂移（lb01中使用pkill nginx，再在lb02中使用ip a 查看）

在lb01查看地址：

在lb02查看地址：

（2）恢复操作（在lb01中先启动nginx服务，再启动keepalived服务）

（3）nginx站点/usr/share/nginx/html

在宿主机上ping虚拟IP，保证可以ping通，说明可以去进行访问

在lb01查看index.html

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

node节点绑定VIP地址

1、修改node节点配置文件统一VIP（bootstrap.kubeconfig,kubelet.kubeconfig）

2、替换完成直接自检

3、重启服务

4、在lb01上查看nginx的k8s日志

在master01上操作

1、测试创建pod

2、查看状态

3、注意日志问题（无法查看，会报错）

解决办法：

（1）权限提升

（2）在去进行日志查看

4、查看pod网络

5、在对应网段的node节点上操作可以直接访问

6、访问就会产生日志，回到master01操作

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