lvs 负载均衡 DR模式 脚本

import paramiko
vip='192.168.83.6' # 虚拟IP

# direct_server_information
ds_info={
    'ip':'192.168.83.5',
    'user':'root',
    'pwd':'yang0121'
}

# real_server_information
real_server_ip=['192.168.83.3','192.168.83.4']
real_server_user=['root','root']
real_server_pwd=['yang0121','yang0121']

ds_cmd = '''
yum install ipvsadm;
ipvsadm -C;
ipvsadm -A -t {vip}:80 -s wrr;
ipvsadm -a -t {vip}:80 -r {rs1}:80 -w 1 -g;
ipvsadm -a -t {vip}:80 -r {rs2}:80 -w 2 -g;
ifconfig ens33:0 {vip} broadcast {vip} netmask 255.255.255.255 up;
route add -host {vip} dev ens33:0;
service httpd restart;
systemctl stop firewalld;
setenforce 0
'''.format(vip=vip, rs1=real_server_ip[0], rs2=real_server_ip[1])

server_cmd = '''
ifconfig lo:0 {vip} broadcast {vip} netmask 255.255.255.255 up;
route add -host {vip} dev lo:0;
echo "1">/proc/sys/net/ipv4/conf/lo/arp_ignore;
echo "2">/proc/sys/net/ipv4/conf/lo/arp_announce;
echo "1">/proc/sys/net/ipv4/conf/all/arp_ignore;
echo "2">/proc/sys/net/ipv4/conf/all/arp_announce;
service httpd restart;
systemctl stop firewalld;
setenforce 0
'''.format(vip=vip)


#配置调度器direct_server
def direct_server():
    ssh = paramiko.SSHClient()
    ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
    ssh.connect(hostname=ds_info['ip'],port=22,username=ds_info['user'],password=ds_info['pwd'])
    stdin, stdout, stderr = ssh.exec_command(ds_cmd)
    print(stderr.read().decode('utf-8'))
    print(stdout.read().decode('utf-8'))
    ssh.close()
    print('dicret_server配置完成！')


#配置real_server
def real_server():
    k=0
    while k<len(real_server_ip):
        ssh = paramiko.SSHClient()
        ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
        ssh.connect(hostname=real_server_ip[k],port=22,username=real_server_user[k],password=real_server_pwd[k])
        stdin, stdout, stderr = ssh.exec_command(server_cmd)
        print(stderr.read().decode('utf-8'))
        print(stdout.read().decode('utf-8'))
        ssh.close()
        k+=1
    print('real_server配置完成！')


def main():
    direct_server()
    real_server()

if __name__ == '__main__':
    main()