import paramiko

vip = '192.168.42.250'

ds = '192.168.42.8'

rs1 = '192.168.42.9'

rs2 = '192.168.42.10'

ds_cmd = '''                                      #调度器配置

        ipvsadm -C;

        ipvsadm -A -t {vip}:80 -s wrr;

        ipvsadm -a -t {vip}:80 -r {rs1}:80 -w 1 -g;

        ipvasdm -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} ens33:0'''.format(vip=vip,rs1=rs1,rs2=rs2)

rs1_cmd = '''                                #real_server1配置

        ifconfig lo:0 {vip} broadcast {vip} netmask 255.255.255.255 up;

        route add -host {vip} lo:0;

        echo "1" > /proc/sys/net/ipv4/conf/all/arp_ignore;

        echo "2" > /proc/sys/net/ipv4/conf/all/arp_announce;

        echo  "1" > /proc/sys/net/ipv4/conf/lo/arp_ignore;

        echo "2" > /proc/sys/net/ipv4/conf/lo/arp_announce;

        service httpd restart'''.format(vip=vip)

rs2_cmd = '''                                #real_server2配置

        ifconfig lo:0 {vip} broadcast {vip} netmask 255.255.255.255 up;

        route add -host {vip} lo:0;

        echo "1" > /proc/sys/net/ipv4/conf/all/arp_ignore;

        echo "2" > /proc/sys/net/ipv4/conf/all/arp_announce;

        echo  "1" > /proc/sys/net/ipv4/conf/lo/arp_ignore;

        echo "2" > /proc/sys/net/ipv4/conf/lo/arp_announce;

        service httpd restart'''.format(vip=vip)

ssh=paramiko.SSHClient()                                  #连接远程主机

ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())

def direct_server():

    ssh.connect('{ds}'.format(ds=ds),22,'root','',timeout=3)

    stdin,stdout,stderr=ssh.exec_command(ds_cmd)

    print(stdout.read().decode('utf-8'))

    print(stderr.read().decode('utf-8'))

    print('direct_server配置完成')

def real_server1():

    ssh.connect('{rs1}'.format(rs1=rs1),22,'root','',timeout=3)

    stdin,stdout,stderr=ssh.exec_command(rs1_cmd)

    print(stdout.read().decode('utf-8'))

    print(stderr.read().decode('utf-8'))

    print('real_server1配置完成')

def real_server2():

    ssh.connect('{rs2}'.format(rs2=rs2),22,'root','',timeout=3)

    stdin,stdout,stderr=ssh.exec_command(rs2_cmd)

    print(stdout.read().decode('utf-8'))

    print(stderr.read().decode('utf-8'))

    print('real_server2配置完成')

def main():                                   #调用函数

    direct_server()

    real_server1()

    real_server2()

    ssh.close()

if __name__ == '__main__':

    main()