Keepalived高可用实战笔记

Keepalived高可用实战笔记

创建虚拟机

vmcentos[0]=CentOS7X64-keep01
vmcentos[1]=CentOS7X64-keep02

1
2
3

parentPath="/media/WNTime/本地磁盘/VirtualMachine.Spaces"
vmsour="$parentPath/CentOS7X64.Core/CentOS7X64.Core.vmx"
for item in ${vmcentos[*]}; 
do
	vmdest="$parentPath/$item/$item.vmx"
	echo "Clone: $vmdest"
	vmrun -T ws clone $vmsour  $vmdest  full -cloneName=$item
	sleep 5s;
done;

1
2
3
4
5
6
7
8
9
10

快照备份

parentPath="/media/WNTime/本地磁盘/VirtualMachine.Spaces"
for item in ${vmcentos[*]}; 
do
	vmdest="$parentPath/$item/$item.vmx"
	vmshot=`date +%Y%m%d`
	echo "Snapshot: $vmdest"
	vmrun -T ws snapshot $vmdest $vmshot
	vmrun -T ws listSnapshots $vmdest
	sleep 5s;
done;

1
2
3
4
5
6
7
8
9
10
11

启动虚拟机

parentPath="/media/WNTime/本地磁盘/VirtualMachine.Spaces"
for item in ${vmcentos[*]}; 
do
	vmdest="$parentPath/$item/$item.vmx"
	vmshot=`date +%Y%m%d%H%M`
	echo "Start: $vmdest"
	vmrun -T ws start $vmdest
	sleep 5s;
	read -p "按任意键继续..."
done;

1
2
3
4
5
6
7
8
9
10
11

挂起虚拟机

parentPath="/media/WNTime/本地磁盘/VirtualMachine.Spaces"
for item in ${vmcentos[*]}; 
do
	vmdest="$parentPath/$item/$item.vmx"
	vmshot=`date +%Y%m%d%H%M`
	echo "Suspend: $vmdest"
	vmrun -T ws suspend $vmdest
	sleep 5s;
done;

1
2
3
4
5
6
7
8
9
10

还原虚拟机

parentPath="/media/WNTime/本地磁盘/VirtualMachine.Spaces"
vmshot=`date +%Y%m%d`
for item in ${vmcentos[*]}; 
do
	vmdest="$parentPath/$item/$item.vmx"
	vmshot=`date +%Y%m%d`
	echo "Revert: $vmdest"
	vmrun -T ws revertToSnapshot $vmdest $vmshot
	sleep 5s;
done;

1
2
3
4
5
6
7
8
9
10
11

关闭虚拟机

parentPath="/media/WNTime/本地磁盘/VirtualMachine.Spaces"
for item in ${vmcentos[*]}; 
do
	vmdest="$parentPath/$item/$item.vmx"
	vmshot=`date +%Y%m%d%H%M`
	echo "Stop: $vmdest"
	vmrun -T ws stop $vmdest
	sleep 5s;
done;	

1
2
3
4
5
6
7
8
9
10

实验网络规划

注意：一定要关闭防火墙，或是添加相关端口！

配置hostname及ipaddress

## 101
# vim /etc/sysconfig/network-script/ifcfg-en33
sudo hostnamectl set-hostname keep-101
sudo sed -i 's/192.168.86.6/192.168.86.101/g' /etc/sysconfig/network-scripts/ifcfg-ens33
sudo systemctl restart network

1
2
3
4
5
6

## 102
# vim /etc/sysconfig/network-script/ifcfg-en33
sudo hostnamectl set-hostname keep-102
sudo sed -i 's/192.168.86.6/192.168.86.102/g' /etc/sysconfig/network-scripts/ifcfg-ens33
sudo systemctl restart network

1
2
3
4
5
6

安装keepalived

keep-101, keep-102

sudo yum makecache
sudo yum install -y wget
sudo mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.bak
sudo wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
sudo yum makecache

wget https://www.keepalived.org/software/keepalived-2.1.5.tar.gz --no-check-certificate
sudo yum install -y  libnl libnl-devel libnl3-devel net-snmp-devel libnfnetlink-devel gcc make openssl-devel popt-devel curl

tar -xzf keepalived-2.1.5.tar.gz
cd keepalived-2.1.5/
./configure --prefix=/usr/local/keepalived --sysconf=/etc
make && sudo make install
# 测试安装
/usr/local/keepalived/sbin/keepalived -v

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16

安装成功

ls -l /etc/keepalived/

1
2

配置系统服务

keep-101, keep-102

# ~/keepalived-2.1.5 是解压出来的文件夹，根据你的解压路径来，不是安装目录
sudo cp ~/keepalived-2.1.5/keepalived/etc/init.d/keepalived /etc/init.d/
sudo cp ~/keepalived-2.1.5/keepalived/etc/sysconfig/keepalived /etc/sysconfig/

sudo systemctl daemon-reload
sudo systemctl enable keepalived
sudo systemctl status keepalived

1
2
3
4
5
6
7
8

高可用配置

keep-101

global_defs {
   router_id keep_vip1
}

vrrp_instance VIP_251 {
    # 主用机设置为 MASTER
    state MASTER
    interface ens33
    virtual_router_id 251
    priority 100
    advert_int 1
    nopreempt
    #preempt_delay 300
    authentication {
        auth_type PASS
        auth_pass 12345678
    }
    virtual_ipaddress {
        192.168.86.251
    }
}

vrrp_instance VIP_252{
    # 主用机设置为 BACKUP
    state BACKUP
    interface ens33
    virtual_router_id 252
    priority 90
    advert_int 1
    nopreempt
    #preempt_delay 300
    authentication {
        auth_type PASS
        auth_pass 12345678
    }
    virtual_ipaddress {
        192.168.86.252
    }
}

/usr/local/keepalived/sbin/keepalived -t
sudo systemctl restart keepalived
sudo systemctl status keepalived

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44

keep-102

global_defs {
   router_id keep_vip2
}

vrrp_instance VIP_251 {
    # 主用机设置为 BACKUP
    state BACKUP
    interface ens33
    virtual_router_id 251
    priority 90
    advert_int 1
    nopreempt
    #preempt_delay 300
    authentication {
        auth_type PASS
        auth_pass 12345678
    }
    virtual_ipaddress {
        192.168.86.251
    }
}

vrrp_instance VIP_252{
    # 主用机设置为 MASTER
    state MASTER
    interface ens33
    virtual_router_id 252
    priority 100
    advert_int 1
    nopreempt
    preempt_delay 300
    authentication {
        auth_type PASS
        auth_pass 12345678
    }
    virtual_ipaddress {
        192.168.86.252
    }
}

/usr/local/keepalived/sbin/keepalived -t
sudo systemctl restart keepalived
sudo systemctl status keepalived

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44

安装 web服务测试

keep-101, keep-102

sudo yum install -y httpd
sudo systemctl stop firewalld
echo " sed -i 's/123/$HOSTNAME/' /usr/share/httpd/noindex/index.html" | sudo bash -
sudo systemctl restart httpd

1
2
3
4
5

# 测试服务是否可以访问
while true; do curl http://192.168.86.251 -s |grep keep && date; sleep  1s; done;
while true; do curl http://192.168.86.252 -s |grep keep && date; sleep  1s; done;

1
2
3
4

下线 keep-102

上线 keep-102

下线 keep-101

上线 keep-101