服务器
主：172.17.0.2 master
备:172.17.0.3 slave1
lvs虚拟IP:172.17.0.100
#nginx下载地址 http://nginx.org/download/本地文件路径
1.dockerfile构建nginx
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 802.#安装nginx的shell脚本 nginx_install.sh
#! /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 install3.构建镜像
#master:
docker build -t mycentos:master-nginx .
#slave
docker build -t mycentos:slave1-nginx .
4.查看构建的镜像
docker images 
5.启动容器
#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
6.安装 keepalived
#keepalived 下载地址
http://nginx.org/download/nginx-1.9.10.tar.gz7.复制本地keepalived包到docker容器中
#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/8.分别进入master slave1容器中
1.进入master slave1 容器中
#master
docker exec -it cf2efc79462d /bin/bash
#slave1
docker exec -it bf0ef0ead87c /bin/bash
2.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openssl
yum install -y openssl openssl-devel
2.3开始编译keepalived
cd keepalived-1.2.18/ && ./configure --prefix=/usr/local/keepalived
2.4进入keepalived-1.2.18目录 make一下
make && make install
9.keepalived安装成Linux系统服务
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/
10.配置keepalived
# 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master
interface 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 1
authentication {
auth_type PASS
auth_pass 1111
}
track_script {
chk_nginx
}
virtual_ipaddress { #设置LVS 虚拟VIP
172.17.0.100
}
}
#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 2
if [ `ps -C nginx --no-header |wc -l` -eq 0 ];then
killall keepalived
fi
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BACKUP
interface 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 1
authentication {
auth_type PASS
auth_pass 1111
}
track_script {
chk_nginx
}
virtual_ipaddress { #设置LVS 虚拟VIP
172.17.0.100
}
}
#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 2
if [ `ps -C nginx --no-header |wc -l` -eq 0 ];then
killall keepalived
fi
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
11.分别启动master,slave1 中keepalived
#启动
service keepalived start
#关闭
service keepalived stop
12进入容器中nginx中修改 /nginx/html/index.html
进入master 容器 ip a
进入slave1 容器 ip a
13测试
#进入master slave1容器中输入
curl 172.17.0.100master:
slave1:
正常情况下只会访问master服务器 -- master 挂掉的情况下才会访问slave1 服务器
master容器中执行
#模拟挂掉
service keepalived stop
请求转移到slave1 服务器中 (curl 172.17.0.100)
slave1 容中执行 ip a
重启master
#模拟重启
service keepalived start
进入master 输入 ip a
输入curl 172.17.0.100
slave1容中 输入ip a
slave1容器中输入 curl 172.17.0.100
