2021-08-29

#nginx下载地址 http://nginx.org/download/

FROM centos:7
ADD nginx-1.6.0.tar.gz /usr/local
COPY nginx_install.sh /usr/local
RUN sh /usr/local/nginx_install.sh
EXPOSE 80

#! /bin/bash
yum install -y gcc -c++ make pcre pcre-devel zlib-devel
cd /usr/local/nginx-1.16.0
./configure --prefix=/usr/local/nginx && make && make install

#master: 
docker build -t mycentos:master-nginx .
#slave
docker build -t mycentos:slave1-nginx .

docker images

#master
docker run -itd --privileged=true -p 80:80 mycentos:master-nginx /usr/sbin/init
#slave1
docker run -itd --privileged=true -p 81:80 mycentos:slave1-nginx /usr/sbin/init

#keepalived 下载地址
http://nginx.org/download/nginx-1.9.10.tar.gz

#master 容器ID:cf2efc79462d  /usr/local/:复制到容器对应的路径下docker cp keepalived-1.2.18.tar.gz cf2efc79462d:/usr/local/#slave1 容器ID: bf0ef0ead87c  /usr/local/:复制到容器对应的路径下docker cp keepalived-1.2.18.tar.gz bf0ef0ead87c:/usr/local/

1.进入master slave1 容器中
#master
docker exec -it cf2efc79462d /bin/bash#slave1
docker exec -it bf0ef0ead87c /bin/bash2.master slave1分别执行以下操作2.1解压安装：tar -zxvf keepalived-1.2.18.tar.gz -C /usr/local/2.2下载插件opensslyum install -y openssl openssl-devel2.3开始编译keepalivedcd keepalived-1.2.18/ && ./configure --prefix=/usr/local/keepalived2.4进入keepalived-1.2.18目录 make一下make && make install

将keepalived安装成Linux系统服务，因为没有使用keepalived的默认安装路径（默认路径：/usr/local）
创建文件夹，将keepalived配置文件进行复制：
mkdir /etc/keepalived
cp /usr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/
复制keepalived脚本文件：
cp /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/
cp /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/
ln -s /usr/local/sbin/keepalived /usr/sbin/
#如果提示文件已经存在先做rm操作 时入sbin目录
rm -rf keepalived
ln -s /usr/local/keepalived/sbin/keepalived /sbin/

# maser  cat keepalived.conf 
vrrp_script chk_nginx {script "/etc/keepalived/nginx_check.sh"interval 2 weight -20
}
vrrp_instance VI_1 {state MASTER              #指定masterinterface eth0            #网卡信息 进入相应的容器 输入命令ip a 可以查看相应的网卡信息virtual_router_id 100     #所有服务器指定一致mcast_src_ip 172.17.0.2   #容器Ip地址 输入命令ip a 可以查看相应IP地址priority 100              nopreempt advert_int 1authentication {          auth_type PASS     auth_pass 1111}track_script {chk_nginx }virtual_ipaddress {     #设置LVS 虚拟VIP172.17.0.100}
}#cat nginx_check.sh  重启nginx脚本
#!/bin/bash
A=`ps -C nginx ?Cno-header |wc -l`
if [ $A -eq 0 ];then/usr/local/nginx/sbin/nginx              #启动Nginx命令sleep 2if [ `ps -C nginx --no-header |wc -l` -eq 0 ];thenkillall keepalivedfi
fi######################################################################### slave1  cat keepalived.conf vrrp_script chk_nginx {script "/etc/keepalived/nginx_check.sh"interval 2 weight -20
}
vrrp_instance VI_1 {state BACKUP              #指定BACKUPinterface eth0            #网卡信息 进入相应的容器 输入命令ip a 可以查看相应的网卡信息virtual_router_id 100     #所有服务器指定一致mcast_src_ip 172.17.0.3   #容器Ip地址 输入命令ip a 可以查看相应IP地址priority 100              nopreempt advert_int 1authentication {          auth_type PASS     auth_pass 1111}track_script {chk_nginx }virtual_ipaddress {     #设置LVS 虚拟VIP172.17.0.100}
}#cat nginx_check.sh  重启nginx脚本
#!/bin/bash
A=`ps -C nginx ?Cno-header |wc -l`
if [ $A -eq 0 ];then/usr/local/nginx/sbin/nginx              #启动Nginx命令sleep 2if [ `ps -C nginx --no-header |wc -l` -eq 0 ];thenkillall keepalivedfi
fi##############################################################
#分别将这些宿主机的配置文件复制到相应的docker容器中
#master
docker cp keepalived.conf cf2efc79462d:/etc/keepalived
docker cp nginx_check.sh cf2efc79462d:/etc/keepalived#slave1
docker cp keepalived.conf bf0ef0ead87c:/etc/keepalived
docker cp nginx_check.sh bf0ef0ead87c:/etc/keepalived

#启动
service keepalived start
#关闭
service keepalived stop

#进入master slave1容器中输入
curl 172.17.0.100

#模拟挂掉
service keepalived stop

#模拟重启
service keepalived start