这篇文章主要介绍了python常用运维脚本的示例分析，具有一定借鉴价值，感兴趣的朋友可以参考下，希望大家阅读完这篇文章之后大有收获，下面让小编带着大家一起了解一下。
一、ps 可以查看进程的内存占用大小，写一个脚本计算一下所有进程所占用内存大小的和。
（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()感谢你能够认真阅读完这篇文章，希望小编分享的“python常用运维脚本的示例分析”这篇文章对大家有帮助，同时也希望大家多多支持亿速云，关注亿速云行业资讯频道，更多相关知识等着你来学习!
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