python运维脚本实例-python常用运维脚本实例小结

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="[email protected]", password="zz54605519", host="smtp.163.com")

yag.send("[email protected]",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()

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。