一、负载均衡 nginx+ keepalived +vip
1、在所有节点，安装nginx
cd /data/work
wget http://nginx.org/download/nginx-1.18.0.tar.gz
#编译
yum install gcc gcc-c++ pcre pcre-devel zlib zlib-devel openssl openssl-devel -y
tar -xzvf nginx-1.18.0.tar.gz
cd nginx-1.18.0
./configure --with-stream --without-http --prefix=/usr/local/nginx --without-http_uwsgi_module
make && make install
#################################################################
--without-http_scgi_module --without-http_fastcgi_module
--with-stream：开启 4 层透明转发(TCP Proxy)功能；
--without-xxx：关闭所有其他功能，这样生成的动态链接二进制程序依赖最小；
#################################################################2、在所有节点，配置nginx
#配置
cat > /usr/local/nginx/conf/nginx.conf<<EOF
worker_processes 1;
events {
worker_connections 1024;
}
stream {
upstream rgw {
hash $remote_addr consistent;
server 192.168.1.70:81 max_fails=3 fail_timeout=30s;
server 192.168.1.71:81 max_fails=3 fail_timeout=30s;
server 192.168.1.72:81 max_fails=3 fail_timeout=30s;
}
upstream nfs {
hash $remote_addr consistent;
server 192.168.1.70:8080 max_fails=3 fail_timeout=30s;
server 192.168.1.71:8080 max_fails=3 fail_timeout=30s;
server 192.168.1.72:8080 max_fails=3 fail_timeout=30s;
}
server {
listen *:80;
proxy_connect_timeout 1s;
proxy_pass rgw;
}
server {
listen *:88;
proxy_connect_timeout 1s;
proxy_pass nfs;
}
}
EOF3、在所有节点，配置Nginx启动文件
cat > /etc/systemd/system/nginx.service <<EOF
[Unit]
Description=kube-apiserver nginx proxy
After=network.target
After=network-online.target
Wants=network-online.target
[Service]
Type=forking
ExecStartPre=/usr/local/nginx/sbin/nginx -t -c /usr/local/nginx/conf/nginx.conf
ExecStart=/usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/nginx.conf
ExecReload=/usr/local/nginx/sbin/nginx -s reload
ExecStop=/usr/local/nginx/sbin/nginx -s stop
PrivateTmp=true
Restart=always
RestartSec=5
StartLimitInterval=0
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target
EOF
systemctl daemon-reload && systemctl enable nginx
systemctl restart nginx && systemctl status nginx |grep 'Active:'4、 70和71安装keepalived
#安装keepalived
yum install -y keepalived
#创建健康检查脚本并分发
cat > /etc/keepalived/nginx_check.sh <<\EOF
#!/bin/bash
A=`ps -C nginx --no-header |wc -l`
if [ $A -eq 0 ];then
/usr/sbin/nginx
sleep 2
if [ `ps -C nginx --no-header |wc -l` -eq 0 ];then
killall keepalived
fi
fi
EOF
#授权
chmod +xxx /etc/keepalived/nginx_check.sh
#查看
ll /etc/keepalived/nginx_check.sh01配置
cat > /etc/keepalived/keepalived.conf <<EOF
! Configuration File for keepalived
global_defs {
router_id nginx_server_1
}
vrrp_script chk_nginx {
script "/etc/keepalived/nginx_check.sh"
interval 2
weight 20
!weight为正数
!如果脚本执行结果为0,,Master:weight+priority>Backup:weight+priority(不切换)
!如果脚本执行结果不为0,Master:priority<Backup:priority+weight(切换)
!weight为负数
!如果脚本执行结果为0,,Master:priority>Backup:priority(不切换)
!如果脚本执行结果不为0,Master:priority+weight<Backup:priority(切换)
!一般来说,weight的绝对值要大于Master和Backup的priority之差
}
vrrp_instance VI_1 {
state MASTER
interface ens192 #注意这里的网卡名称修改成你机器真实的内网网卡名称，可用命令ip addr查看
virtual_router_id 51
unicast_src_ip 192.168.1.70 #本机IP
unicast_peer { #虚拟ip地址,可以有多个地址，每个地址占一行，不需要子网掩码
192.168.1.71
}
priority 100
nopreempt
advert_int 1
authentication {
auth_type PASS
auth_pass 1111 !认密码 两台nginx密码要一致
}
track_script {
chk_nginx
}
virtual_ipaddress { #VIP地址192.168.1.226
192.168.1.226
}
}
EOF
# 重启服务
systemctl restart keepalived.service
# 查看运行状态
systemctl status keepalived.service
# 添加开机自启动（haproxy默认安装好就添加了自启动）
systemctl enable keepalived.service
# 查看是否添加成功
systemctl is-enabled keepalived.service
#enabled就代表添加成功了
# 同时我可查看下VIP是否已经生成
ip a|grep 22602配置
cat > /etc/keepalived/keepalived.conf <<EOF
! Configuration File for keepalived
global_defs {
router_id nginx_server_1
}
vrrp_script chk_nginx {
script "/etc/keepalived/nginx_check.sh"
interval 2
weight 20
!weight为正数
!如果脚本执行结果为0,,Master:weight+priority>Backup:weight+priority(不切换)
!如果脚本执行结果不为0,Master:priority<Backup:priority+weight(切换)
!weight为负数
!如果脚本执行结果为0,,Master:priority>Backup:priority(不切换)
!如果脚本执行结果不为0,Master:priority+weight<Backup:priority(切换)
!一般来说,weight的绝对值要大于Master和Backup的priority之差
}
vrrp_instance VI_1 {
state MASTER
interface ens192 #注意这里的网卡名称修改成你机器真实的内网网卡名称，可用命令ip addr查看
virtual_router_id 51
unicast_src_ip 192.168.1.71 #本机IP
unicast_peer { #虚拟ip地址,可以有多个地址，每个地址占一行，不需要子网掩码
192.168.1.70
}
priority 100
nopreempt
advert_int 1
authentication {
auth_type PASS
auth_pass 1111 !认密码 两台nginx密码要一致
}
track_script {
chk_nginx
}
virtual_ipaddress { #VIP地址192.168.1.226
192.168.1.226
}
}
EOF
# 重启服务
systemctl restart keepalived.service
# 查看运行状态
systemctl status keepalived.service
# 添加开机自启动（haproxy默认安装好就添加了自启动）
systemctl enable keepalived.service
# 查看是否添加成功
systemctl is-enabled keepalived.service
#enabled就代表添加成功了
# 同时我可查看下VIP是否已经生成
ip a|grep 226
