（提示，使用ps aux 列出所有进程，过滤出RSS那列，然后求和）
注：ps -ef 与 ps aux 效果一样使用随意
import os list = [] sum = 0 str1 = os.popen(‘ps aux‘,‘r‘).readlines() for i in str1: str2 = i.split() new_rss = str2[5] list.append(new_rss) for i in list[1:-1]: num = int(i) sum = sum + num print ‘%s:%s‘ %(list[0],sum)
二、一键部署lvs与keepalived
注：部署keepalived配置文件，会自动将lvs部署好，不必单独搭建，但是要下载好ipvsadm
这里单独搭建了lvs
#提前配置好免密钥登陆，与apache服务 import pexpect import os ds_ip = ‘192.168.102.143‘ rs1_ip = ‘192.168.102.144‘ rs2_ip = ‘192.168.102.145‘ vip = ‘192.168.102.250‘ ds_cmd = [‘ipvsadm -C‘, ‘ipvsadm -A -t {vip}:80 -s rr‘.format(vip=vip), ‘ipvsadm -a -t {vip}:80 -r {rs1_ip}:80 -g‘.format(vip=vip, rs1_ip=rs1_ip), ‘ipvsadm -a -t {vip}:80 -r {rs2_ip}:80 -g‘.format(vip=vip,rs2_ip=rs2_ip), ‘ifconfig ens33:0 {vip} broadcast {vip} netmask 255.255.255.255 up‘.format(vip=vip), ‘route add -host {vip} dev ens33:0‘.format(vip=vip) ] # for ds_cmd in ds_cmd: rs1_cmd = [ ‘ansible rs1 -m shell -a "ifconfig lo:0 {vip} broadcast {vip} netmask 255.255.255.255 up" &>/dev/null‘.format(vip=vip), ‘ansible rs1 -m shell -a "route add -host {vip} dev lo:0" &>/dev/null‘.format(vip=vip), ‘ansible rs1 -m shell -a "echo "1" > /proc/sys/net/ipv4/conf/lo/arp_ignore" &>/dev/null‘, ‘ansible rs1 -m shell -a "echo "2" > /proc/sys/net/ipv4/conf/lo/arp_announce" &>/dev/null‘, ‘ansible rs1 -m shell -a "echo "1" > /proc/sys/net/ipv4/conf/all/arp_ignore" &>/dev/null‘, ‘ansible rs1 -m shell -a "echo "2" > /proc/sys/net/ipv4/conf/all/arp_announce" &>/dev/null‘, ‘service httpd restart‘] # for rs_cmd in rs_cmd: rs2_cmd = [ ‘ansible rs2 -m shell -a "ifconfig lo:0 {vip} broadcast {vip} netmask 255.255.255.255 up" &>/dev/null‘.format(vip=vip), ‘ansible rs2 -m shell -a "route add -host {vip} dev lo:0" &>/dev/null‘.format(vip=vip), ‘ansible rs2 -m shell -a "echo "1" > /proc/sys/net/ipv4/conf/lo/arp_ignore" &>/dev/null‘, ‘ansible rs2 -m shell -a "echo "2" > /proc/sys/net/ipv4/conf/lo/arp_announce" &>/dev/null‘, ‘ansible rs2 -m shell -a "echo "1" > /proc/sys/net/ipv4/conf/all/arp_ignore" &>/dev/null‘, ‘ansible rs2 -m shell -a "echo "2" > /proc/sys/net/ipv4/conf/all/arp_announce" &>/dev/null‘, ‘service httpd restart‘] ansible=‘‘‘ echo "[rs1]" >> /etc/ansible/hosts; echo "{rs1_ip}" >> /etc/ansible/hosts; echo "[rs2]" >> /etc/ansible/hosts; echo "{rs2_ip}" >> /etc/ansible/hosts; ‘‘‘.format(rs1_ip=rs1_ip,rs2_ip=rs2_ip) def Ansible(): res = os.system(‘yum install ansible -y &>/dev/null‘) if res== 0: print(‘ansible安装完成！‘) os.system(ansible) def lvs(): i = os.system(‘yum -y install ipvsadm &>/dev/null‘) if i == 0: print(‘lvs下载完成‘) for a in ds_cmd: res = os.system(a) if res == 0: print(‘ok‘) else: print(‘false‘) for b in rs1_cmd: res1 = os.system(b) if res1 == 0: print(‘ok‘) else: print(‘false‘) for c in rs2_cmd: res2 = os.system(c) if res2 == 0: print(‘ok‘) else: print(‘false‘) else: print(‘lvs下载失败‘) keepalived = ‘‘‘ #全局配置 ! Configuration File for keepalived #全局配置 global_defs { notification_email { #收件人地址 } #邮件服务器 } VRRP配置DS1 vrrp_instance VI_1 { state MASTER #角色类型MASTER|BACKUP interface ens33 #网卡名称 virtual_router_id 51 #虚拟路由id（需要与BACKUP一致） priority 100 #优先级 advert_int 1 #没1秒检查一次 #nopreempt #非抢占模式 authentication { auth_type PASS #认证类型 主备之间必须一样 auth_pass 1111 #认证密码 主备之间必须一样 } virtual_ipaddress { 192.168.102.250 #虚拟ip（vip） } } #LVS配置 virtual_server 192.168.102.250 80 { delay_loop 3 #健康检查时间间隔 lb_algo rr #负载均衡调度算法 lb_kind DR #负载均衡转发规则 protocol TCP #协议 real_server 192.168.102.144 80 { #要监控的real_server的ip和端口号 weight 1 #权重 TCP_CHECK { #基于tcp协议的检查 connect_timeout 3 #连接时间超时 retry 3 #重连次数 delay_before_retry 3 #重连间隔时间 } } real_server 192.168.102.145 80 { weight 1 TCP_CHECK { connect_timeout 3 retry 3 delay_before_retry 3 } } }‘‘‘ def Keepalived(): d = os.system(‘yum install keepalived -y &> /dev/null‘) if d == 0: print(‘keeplived下载完成‘) with open(r‘/etc/keepalived/keepalived.conf‘, ‘w‘, encoding=‘utf-8‘) as f: f.write(keepalived) e = os.system(‘systemctl start keepalived‘) if e == 0: print(‘keepalived部署完成！‘) else: print(‘keepalived部署失败‘) else: print(‘keepalived下载失败‘) def main(): # key() Ansible() # ssh_copy() lvs() Keepalived() if __name__ == ‘__main__‘: main()
三、
用python3编写一个监控上面lvs服务状态和系统资源的脚本
import yagmail import paramiko import socket import re import time ssh = paramiko.SSHClient() ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy()) rs1_ip = ‘192.168.102.144‘ rs2_ip = ‘192.168.102.145‘ ds_ip = ‘192。168.102.143‘ disk_cmd = "df -m | grep /dev/sda1 | awk ‘{print $4}‘" cpu_cmd = ‘‘‘ top n 1 d 1 b -p 1 | grep ‘%Cpu‘ | awk -F "," ‘{print $4}‘ | awk -F "id" ‘{print $1}‘ | awk -F "." ‘{print $1}‘ ‘‘‘ free_cmd = "free -m | grep Mem |awk ‘{print $7}‘" def connect1(): ssh.connect(‘{rs1_ip}‘.format(rs1_ip=rs1_ip), 22, ‘root‘, ‘1‘, timeout=3) def connect2(): ssh.connect(‘{rs2_ip}‘.format(rs2_ip=rs1_ip), 22, ‘root‘, ‘1‘, timeout=3) def mail(head, Contents): yag = yagmail.SMTP(user="15898297124@163.com", password="zz54605519", host=‘smtp.163.com‘) yag.send(‘15898297124@163.com‘,subject = head, contents = Contents) yag.close() def http(): socket.setdefaulttimeout(1) server = socket.socket() host_list = [‘%s:80‘ % (rs1_ip),‘%s:80‘ % (rs2_ip)] for info in host_list: ip = re.compile(‘(.*?):(.*)‘).search(info).group(1) port = re.compile(‘(.*?):(.*)‘).search(info).group(2) res = server.connect_ex((ip, int(port))) if res != 0: mail(ip,‘%s不通‘ % port) def disk(): connect1() stdin1, stdout1, stderr1 = ssh.exec_command(disk_cmd) disk1 = int(stdout1.read().decode(‘utf-8‘)) print(‘%s节点disk剩余空间为%sM‘ % (rs1_ip,disk1)) if disk1 <= 200: mail(rs1_ip,‘disk剩余空间为%sM‘ % disk1) connect2() stdin2, stdout2, stderr2 = ssh.exec_command(disk_cmd) disk2 = int(stdout2.read().decode(‘utf-8‘)) print(‘%s节点disk剩余空间为%sM‘ % (rs2_ip, disk2)) if disk2 <= 200: mail(rs2_ip, ‘disk剩余空间为%sM‘ % disk2) def cpu(): connect1() stdin1, stdout1, stderr1 = ssh.exec_command(cpu_cmd) cpu1 = int(stdout1.read().decode(‘utf-8‘)) cpu = 100 - cpu1 print(‘%s节点cpu使用率为百分之%s‘ % (rs1_ip, cpu)) if cpu >= 80: mail(rs1_ip, ‘cpu使用量为%s‘ % cpu) connect2() stdin2, stdout2, stderr2 = ssh.exec_command(cpu_cmd) cpu2 = int(stdout2.read().decode(‘utf-8‘)) cpu = 100 - cpu2 print(‘%s节点cpu使用率为百分之%s‘ % (rs2_ip, cpu)) if cpu >= 80: mail(rs2_ip, ‘cpu使用量为%s‘ % cpu) def free(): connect1() stdin1, stdout1, stderr1 = ssh.exec_command(free_cmd) free1 = int(stdout1.read().decode(‘utf-8‘)) print(‘%s节点磁盘剩余空间为%sM‘ % (rs1_ip, free1)) if free1 <= 200: mail(ds_ip, ‘磁盘剩余空间为%sM‘ % free1) connect2() stdin2, stdout2, stderr2 = ssh.exec_command(disk_cmd) free2 = int(stdout2.read().decode(‘utf-8‘)) print(‘%s节点磁盘剩余空间为%sM‘ % (rs2_ip, free2)) if free2 <= 200: mail(ds_ip, ‘磁盘剩余空间为%sM‘ % free2) def main(): while True: http() cpu() free() disk() time.sleep(60) if __name__ == ‘__main__‘: main()
四、用python编写一键部署数据库主从服务
主服务器
import pexpect import os import configparser # HOSTNAME_DB1=‘db1‘ # HOSTNAME_DB2=‘db2‘ # DB1 = ‘192.168.254.24‘ # DB2 = ‘192.168.254.27‘ DBPASSWORD = ‘1‘ def repo(): os.system(‘touch /etc/yum.repos.d/mariadb.repo‘) with open(‘/etc/yum.repos.d/mariadb.repo‘,‘w‘,encoding=‘utf8‘) as f: f.write(‘[mariadb]‘) config = configparser.ConfigParser() config.read("/etc/yum.repos.d/mariadb.repo", encoding="utf-8") config.set(‘mariadb‘, ‘name‘, ‘MariaDB‘) config.set(‘mariadb‘, ‘baseurl‘, ‘http://mirrors.ustc.edu.cn/mariadb/yum/10.3/centos7-amd64/‘) config.set(‘mariadb‘, ‘gpgkey‘, ‘http://mirrors.ustc.edu.cn/mariadb/yum/RPM-GPG-KEY-MariaDB‘) config.set(‘mariadb‘, ‘gpgcheck‘, ‘1‘) config.write(open(‘/etc/yum.repos.d/mariadb.repo‘,‘w‘)) def mariadb(): a = os.system(‘yum install MariaDB -y &> /dev/null‘) if a == 0: b = os.system(‘systemctl start mariadb &> /dev/null‘) if b == 0: print(‘mariadb启动成功‘) child = pexpect.spawn(‘mysql_secure_installation‘) child.expect(‘enter for none‘) child.sendline(‘‘) child.expect(‘Y/n‘) child.sendline(‘y‘) child.expect(‘New‘) child.sendline(DBPASSWORD) child.expect(‘Re-enter‘) child.sendline(DBPASSWORD) child.expect(‘successfully‘) child.sendline(‘‘) child.sendline(‘‘) child.sendline(‘‘) child.sendline(‘‘) child.interact() child.close() def db1(): config = configparser.ConfigParser() config.read("/etc/my.cnf.d/server.cnf", encoding="utf-8") config.set(‘mysqld‘, ‘server-id‘, ‘1‘) config.set(‘mysqld‘, ‘log-bin‘, ‘mysql-bin‘) config.write(open(‘/etc/my.cnf.d/server.cnf‘,‘w‘)) b = os.system(‘systemctl restart mariadb‘) if b == 0: # os.system(‘mysql -uroot -p%s‘ % DBPASSWORD) # os.system("CREATE USER ‘slave‘@‘%‘ IDENTIFIED BY ‘slave‘;") # os.system("GRANT REPLICATION SLAVE ON *.* TO ‘slave‘@‘%‘;") # os.system(‘flush privileges;‘) # os.system(‘show master status‘) child = pexpect.spawn(‘mysql -uroot -p1‘) child.expect(‘none‘) child.sendline("CREATE USER ‘slave‘@‘%‘ IDENTIFIED BY ‘slave‘;") child.expect(‘none‘) child.sendline("GRANT REPLICATION SLAVE ON *.* TO ‘slave‘@‘%‘;") child.expect(‘none‘) child.sendline(‘flush privileges;‘) child.expect(‘none‘) child.sendline(‘show master status;‘) child.interact() child.close() def main(): repo() mariadb() db1() if __name__ == ‘__main__‘: main()
从服务器
import pexpect import os import configparser # HOSTNAME_DB1=‘db1‘ # HOSTNAME_DB2=‘db2‘ DB1 = ‘192.168.102.143‘ # DB2 = ‘192.168.254.27‘ DBPASSWORD = ‘1‘ def repo(): os.system(‘touch /etc/yum.repos.d/mariadb.repo‘) with open(‘/etc/yum.repos.d/mariadb.repo‘,‘w‘,encoding=‘utf8‘) as f: f.write(‘[mariadb]‘) config = configparser.ConfigParser() config.read("/etc/yum.repos.d/mariadb.repo", encoding="utf-8") config.set(‘mariadb‘, ‘name‘, ‘MariaDB‘) config.set(‘mariadb‘, ‘baseurl‘, ‘http://mirrors.ustc.edu.cn/mariadb/yum/10.3/centos7-amd64/‘) config.set(‘mariadb‘, ‘gpgkey‘, ‘http://mirrors.ustc.edu.cn/mariadb/yum/RPM-GPG-KEY-MariaDB‘) config.set(‘mariadb‘, ‘gpgcheck‘, ‘1‘) config.write(open(‘/etc/yum.repos.d/mariadb.repo‘,‘w‘)) def mariadb(): a = os.system(‘yum install MariaDB -y‘) if a == 0: b = os.system(‘systemctl start mariadb &> /dev/null‘) if b == 0: print(‘mariadb启动成功‘) child = pexpect.spawn(‘mysql_secure_installation‘) child.expect(‘enter for none‘) child.sendline(‘‘) child.expect(‘Y/n‘) child.sendline(‘y‘) child.expect(‘New‘) child.sendline(DBPASSWORD) child.expect(‘Re-enter‘) child.sendline(DBPASSWORD) child.expect(‘successfully‘) child.sendline(‘‘) child.sendline(‘‘) child.sendline(‘‘) child.sendline(‘‘) def db2(): config = configparser.ConfigParser() config.read("/etc/my.cnf.d/server.cnf", encoding="utf-8") config.set(‘mysqld‘, ‘server-id‘, ‘2‘) config.write(open(‘/etc/my.cnf.d/server.cnf‘,‘w‘)) b = os.system(‘systemctl restart mariadb‘) if b == 0: bin = ‘mysql-bin.000001‘ pos = 765 # os.system(‘mysql -uroot -p%s‘ % DBPASSWORD) # os.system(‘‘‘mysql -uroot -p%s -e "CHANGE MASTER TO MASTER_HOST=‘%s‘, MASTER_USER=‘slave‘, MASTER_PASSWORD=‘slave‘, MASTER_LOG_FILE=‘%s‘, MASTER_LOG_POS=%s;"‘‘‘ % (DBPASSWORD,DB1,bin,pos)) # os.system("mysql -uroot -p%s -e ‘start slave;‘" % DBPASSWORD) child = pexpect.spawn(‘mysql -uroot -p%s‘ % DBPASSWORD) child.expect(‘none‘) child.sendline("CHANGE MASTER TO MASTER_HOST=‘%s‘, MASTER_USER=‘slave‘, MASTER_PASSWORD=‘slave‘, MASTER_LOG_FILE=‘%s‘, MASTER_LOG_POS=%s;" % (DB1,bin,pos)) child.expect(‘none‘) child.sendline( ‘start slave;‘ ) child.interact() child.close() def main(): repo() mariadb() db2() if __name__ == ‘__main__‘: main()
原文：https://www.cnblogs.com/zhou2019/p/10864079.html