【SSH项目实战三】脚本密钥的批量分发与执行

【SSH项目实战】脚本密钥的批量分发与执行

标签(空格分隔): Linux服务搭建-陈思齐

---本教学笔记是本人学习和工作生涯中的摘记整理而成,此为初稿(尚有诸多不完善之处),为原创作品,允许转载,转载时请务必以超链接形式标明文章原始出处,作者信息和本声明。否则将追究法律责任。http://www.cnblogs.com/chensiqiqi/


目录

前言

《项目实战》系列为《linux实战教学笔记》第二阶段内容的同步教学配套实战练习,每个项目循序衔接最终将组成《Linux实战教学笔记》第二阶段核心教学目标10台规模的基础核心服务架构集群。本文上接http://www.cnblogs.com/chensiqiqi/p/6556509.html 项目实战二

【企业案例】

公司来了8台新服务器,计划组成一个小规模集群架构;其中有一台服务器作为批量管理服务器使用,其余7台则是业务架构所需。现在先由你来负责服务器的前期配置工作,

现要求如下:

  • [x] 从管理服务器ssh连接到其他任何服务器时进行免密码的密钥认证,要求进行批量分发。(脚本实现批量分发)
  • [x] 由于没有DNS解析服务器,所以各个服务器需要进行hosts的服务器地址解析,因此,需要进行/etc/hosts文件的批量分发(ansible实现文件批量分发)
  • [x] 新服务器初期需要做简单的优化(服务器优化脚本)和yum仓库的搭建(epel.repo源)。(ansible实现脚本的批量分发和批量执行)

环境准备

操作系统

[root@m01 ~]# cat /etc/redhat-release
CentOS release 6.8 (Final)

内核版本

[root@m01 ~]# uname -r
2.6.32-642.el6.x86_64

主机网络参数设置:

主机名 网卡eth0 网卡eth1 用途
lb01 10.0.0.5/24 172.16.1.5/24 A1-nginx负载均衡服务器01
lb02 10.0.0.6/24 172.16.1.6/24 A2-nginx负载均衡服务器02
web02 10.0.0.7/24 172.16.1.7/24 B1-apache web服务器
web01 10.0.0.8/24 172.16.1.8/24 B2-nginx web服务器
db01 10.0.0.51/24 172.16.1.51/24 C3-mysql数据库服务器
nfs01 10.0.0.31/24 172.16.1.31/24 C1-NFS存储服务器
backup 10.0.0.41/24 172.16.1.41/24 C2-rsync存储服务器
m01 10.0.0.61/24 172.16.1.61/24 X-管理服务器

一,开始部署ssh密钥的批量分发

第一步:开始安装sshpass免交互工具并进行SSH-key的批量分发

下载epel源并更新yum仓库

[root@m01 ~]# wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-6.repo
[root@m01 ~]# yum -y clean all
[root@m01 ~]# yum makecache

安装sshpass工具

[root@m01 ~]# yum -y install sshpass

第二步:创建密钥对文件

免交互创建密钥对

[root@m01 ~]# ssh-keygen -t dsa -f ~/.ssh/id_dsa -P ""
Generating public/private dsa key pair.
Your identification has been saved in /root/.ssh/id_dsa.
Your public key has been saved in /root/.ssh/id_dsa.pub.
The key fingerprint is:
4d:01:91:98:be:02:89:ab:ce:63:4f:81:e3:ab:0b:f8 root@m01
The key's randomart image is:
+--[ DSA 1024]----+
| oo+. |
| o . . |
| . . . . |
|. + . o |
| + o .S . |
|+ . o . |
|+. . . |
|++o |
|*=E. |
+-----------------+
[root@m01 ~]# ls ~/.ssh/
authorized_keys id_dsa id_dsa.pub known_hosts 命令说明:
ssh-keygen:生成密钥对命令
-t:指定密钥对的密码加密类型(rsa,dsa两种)
-f:指定密钥对文件的生成路径包含文件名
-P(大写):指定密钥对的密码

第三步:免交户方式分发公钥

[root@m01 ~]# sshpass -p "ssh登录密码" ssh-copy-id -i ~/.ssh/id_dsa.pub "-o StrictHostKeyChecking=no root@172.16.1.31"
Now try logging into the machine, with "ssh '-o StrictHostKeyChecking=no root@172.16.1.31'", and check in: .ssh/authorized_keys to make sure we haven't added extra keys that you weren't expecting. [root@m01 ~]# 命令说明:
sshpass:专为ssh连接服务的免交户工具
-p :指定登录的密码
ssh-copy-id:自动分发公钥的工具
-i:指定公钥路径
-o StrictHostKeyChecking=no :不进行对方主机信息的写入(第一次ssh连接会在know_hosts文件里记录)

第四步:测试ssh密钥认证情况

[root@m01 ~]# ssh root@172.16.1.31   #测试成功,免密码ssh连接
Last login: Tue Mar 14 21:49:58 2017 from 172.16.1.1
[root@nfs01 ~]#

第五步:编写ssh密钥对免交户批量分发脚本

#!/bin/bash
# author:Mr.chen
# 2017-3-14
# description:SSH密钥批量分发 User=root
passWord=##Linux登录密码 function YumBuild(){ echo "正在安装epel源yum仓库,请稍后..."
cd /etc/yum.repos.d/ &&\
[ -d bak ] || mkdir bak
[ `find ./*.* -type f | wc -l` -gt 0 ] && find ./*.* -type f | xargs -i mv {} bak/
wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-6.repo &>/dev/null
yum -y clean all &>/dev/null
yum makecache &>/dev/null } echo "正在进行网络连接测试,请稍后..."
ping www.baidu.com -c2 >/dev/null ||(echo "无法连同外网,本脚本运行环境必须和外网相连!" && exit)
[ $# -eq 0 ] && echo "没有参数!格式为:sh $0 参数1...n" && exit
rpm -q sshpass &>/dev/null || yum -y install sshpass &>/dev/null
if [ $? -gt 0 ];then
YumBuild
yum -y install sshpass &>/dev/null || (echo "sshpass build error!" && exit)
fi
[ -d ~/.ssh ] || mkdir ~/.ssh;chmod 700 ~/.ssh
echo "正在创建密钥对...."
rm -rf ~/.ssh/id_dsa ~/.ssh/id_dsa.pub
ssh-keygen -t dsa -f ~/.ssh/id_dsa -P "" &>/dev/null
for ip in $*
do
ping $ip -c1 &>/dev/null
if [ $? -gt 0 ];then
echo "$ip无法ping通请检查网络"
continue
fi
sshpass -p "$passWord" ssh-copy-id -i ~/.ssh/id_dsa.pub "-o StrictHostKeyChecking=no ${User}@$ip" &>/dev/null
echo "$ip 密钥分发成功"
done

特别提示:

脚本内容仅作思路开拓之用!

想学好shell或者编程,光看是没用的;

1,学(基础)

2,看(思路)

3,仿(写法)

4,练(课外)

切记....

第六步:脚本分发测试

[root@m01 yum.repos.d]# sh /server/scripts/ssh_key.sh 172.16.1.5 172.16.1.6 172.16.1.7 172.16.1.8 172.16.1.51 172.16.1.31 172.16.1.41 172.16.1.61
正在进行网络连接测试,请稍后...
正在创建密钥对....
172.16.1.5无法ping通请检查网络
172.16.1.6无法ping通请检查网络
172.16.1.7 密钥分发成功
172.16.1.8 密钥分发成功
172.16.1.51无法ping通请检查网络
172.16.1.31 密钥分发成功
172.16.1.41 密钥分发成功
172.16.1.61 密钥分发成功 备注:
故意少开了3台,脚本测试成功。

二,开始部署ansible自动化工具并进行文件的批量分发

第一步:安装ansible工具

需要epel.repo源

wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-6.repo

yum -y install ansible

第二步:配置主机组

配置/etc/ansible/hosts文件

[root@m01 ~]# tail -8 /etc/ansible/hosts
[chensiqi]
172.16.1.31
172.16.1.41
172.16.1.51
172.16.1.5
172.16.1.6
172.16.1.7
172.16.1.8

由于已经配置过免密码的密钥认证了,所以/etc/ansible/hosts的主机映射文件只要加入被管理主机的IP地址就可以了。

第三步:进行ansible批量管理测试

[root@m01 ~]# ansible chensiqi -m command -a "w"
172.16.1.6 | SUCCESS | rc=0 >>
08:47:40 up 12 min, 1 user, load average: 0.00, 0.01, 0.01
USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT
root pts/0 m01 08:47 0.00s 0.27s 0.01s /bin/sh -c /usr 172.16.1.41 | SUCCESS | rc=0 >>
22:48:28 up 1 day, 3:37, 2 users, load average: 0.00, 0.01, 0.05
USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT
root tty1 - Sat03 1:15m 0.15s 0.15s -bash
root pts/0 m01 22:48 1.00s 0.33s 0.00s /bin/sh -c /usr 172.16.1.51 | SUCCESS | rc=0 >>
08:47:41 up 13 min, 1 user, load average: 0.08, 0.03, 0.05
USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT
root pts/0 m01 08:47 1.00s 0.29s 0.00s /bin/sh -c /usr 172.16.1.31 | SUCCESS | rc=0 >>
10:27:47 up 15:47, 2 users, load average: 0.16, 0.05, 0.06
USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT
root tty1 - Mon20 20:56m 0.15s 0.15s -bash
root pts/0 m01 10:27 0.00s 0.26s 0.00s /bin/sh -c /usr 172.16.1.5 | SUCCESS | rc=0 >>
08:47:41 up 12 min, 1 user, load average: 0.00, 0.01, 0.03
USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT
root pts/0 m01 08:47 0.00s 0.20s 0.00s /bin/sh -c /usr 172.16.1.7 | SUCCESS | rc=0 >>
21:03:00 up 10:03, 2 users, load average: 0.05, 0.05, 0.05
USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT
root tty1 - 11:00 2:03m 0.14s 0.14s -bash
root pts/0 m01 21:02 1.00s 0.18s 0.00s /bin/sh -c /usr 172.16.1.8 | SUCCESS | rc=0 >>
10:27:48 up 14:31, 2 users, load average: 0.00, 0.01, 0.05
USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT
root tty1 - Sat09 20:03m 0.10s 0.10s -bash
root pts/0 m01 10:27 1.00s 0.16s 0.00s /bin/sh -c /usr

第四步,进行/etc/hosts文件的批量分发

[root@m01 ~]# ansible chensiqi -m copy -a "src=/etc/hosts dest=/etc/hosts backup=yes"   #backup=yes 如果目标存在文件,那么覆盖前是否备份目标文件
172.16.1.51 | SUCCESS => {
"changed": true,
"checksum": "dba0126bf49ea8d4cdc476828f9edb37085c6afe",
"dest": "/etc/hosts",
"gid": 0,
"group": "root",
"md5sum": "09bad48d0c62411850fd04b68f836335",
"mode": "0644",
"owner": "root",
"secontext": "system_u:object_r:net_conf_t:s0",
"size": 294,
"src": "/root/.ansible/tmp/ansible-tmp-1489446564.45-249855699288208/source",
"state": "file",
"uid": 0
}
172.16.1.31 | SUCCESS => {
"changed": true,
"checksum": "dba0126bf49ea8d4cdc476828f9edb37085c6afe",
"dest": "/etc/hosts",
"gid": 0,
"group": "root",
"md5sum": "09bad48d0c62411850fd04b68f836335",
"mode": "0644",
"owner": "root",
"secontext": "system_u:object_r:net_conf_t:s0",
"size": 294,
"src": "/root/.ansible/tmp/ansible-tmp-1489446564.26-6373581674916/source",
"state": "file",
"uid": 0
}
172.16.1.41 | SUCCESS => {
"changed": true,
"checksum": "dba0126bf49ea8d4cdc476828f9edb37085c6afe",
"dest": "/etc/hosts",
"gid": 0,
"group": "root",
"md5sum": "09bad48d0c62411850fd04b68f836335",
"mode": "0644",
"owner": "root",
"secontext": "system_u:object_r:net_conf_t:s0",
"size": 294,
"src": "/root/.ansible/tmp/ansible-tmp-1489446564.37-90309519963188/source",
"state": "file",
"uid": 0
}
172.16.1.5 | SUCCESS => {
"changed": true,
"checksum": "dba0126bf49ea8d4cdc476828f9edb37085c6afe",
"dest": "/etc/hosts",
"gid": 0,
"group": "root",
"md5sum": "09bad48d0c62411850fd04b68f836335",
"mode": "0644",
"owner": "root",
"secontext": "system_u:object_r:net_conf_t:s0",
"size": 294,
"src": "/root/.ansible/tmp/ansible-tmp-1489446564.91-218095487370821/source",
"state": "file",
"uid": 0
}
172.16.1.6 | SUCCESS => {
"changed": true,
"checksum": "dba0126bf49ea8d4cdc476828f9edb37085c6afe",
"dest": "/etc/hosts",
"gid": 0,
"group": "root",
"md5sum": "09bad48d0c62411850fd04b68f836335",
"mode": "0644",
"owner": "root",
"secontext": "system_u:object_r:net_conf_t:s0",
"size": 294,
"src": "/root/.ansible/tmp/ansible-tmp-1489446564.92-48667872204035/source",
"state": "file",
"uid": 0
}
172.16.1.8 | SUCCESS => {
"changed": true,
"checksum": "dba0126bf49ea8d4cdc476828f9edb37085c6afe",
"dest": "/etc/hosts",
"gid": 0,
"group": "root",
"md5sum": "09bad48d0c62411850fd04b68f836335",
"mode": "0644",
"owner": "root",
"secontext": "system_u:object_r:net_conf_t:s0",
"size": 294,
"src": "/root/.ansible/tmp/ansible-tmp-1489446566.37-188264096277764/source",
"state": "file",
"uid": 0
}
172.16.1.7 | SUCCESS => {
"changed": true,
"checksum": "dba0126bf49ea8d4cdc476828f9edb37085c6afe",
"dest": "/etc/hosts",
"gid": 0,
"group": "root",
"md5sum": "09bad48d0c62411850fd04b68f836335",
"mode": "0644",
"owner": "root",
"secontext": "system_u:object_r:net_conf_t:s0",
"size": 294,
"src": "/root/.ansible/tmp/ansible-tmp-1489446566.39-64165112131501/source",
"state": "file",
"uid": 0
}

特别提示:

如果目标路径存在文件,并且目标文件和你想要copy的文件完全相同的话,也会导致ansilbe的copy功能失效

三,编写服务器初期优化脚本(服务优化+自动安装epel源yum仓库),并用ansible进行脚本的批量分发和批量执行

第一步:编写服务器初期服务优化+epel源yum仓库搭建脚本

#!/bin/bash
# author:Mr.chen
# 2017-3-15
# description:服务器初期优化脚本+epel源yum仓库搭建 function ServerSystemOptimize(){ echo "脚本开始尝试对服务器进行一些必要的优化...." && sleep 2
/etc/init.d/iptables stop &>/dev/null && echo "防火墙已经关闭!" && sleep 1
setenforce 0 &>/dev/null && echo "SElinux 已关闭!" || echo "SElinux未开启!"
chkconfig iptables off && echo "防火墙已经取消开机启动!"&& sleep 1
sed -i '7 s/enforcing/disabled/g' /etc/selinux/config && echo "SElinux已经取消开机启动!"&& sleep 1
A=`awk '/id:/ {print NR,$0}' /etc/inittab | awk '{print $1}'`
sed -i "$A s/5/3/g" /etc/inittab && echo "Linux启动运行级别已经永久设置为3!" && sleep 1
chkconfig --list | egrep -v "rsyslog|network|crond|sysstat|sshd" | awk '{print "chkconfig",$1,"off"}' | bash &>/dev/null && echo "脚本已经关闭Linux不必要服务的开机自启动!" && sleep 1 } function YumBuild(){ echo "正在安装epel源yum仓库,请稍后..."
cd /etc/yum.repos.d/ &&\
[ -d bak ] || mkdir bak
[ `find ./*.* -type f | wc -l` -gt 0 ] && find ./*.* -type f | xargs -i mv {} bak/
wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-6.repo &>/dev/null
yum -y clean all &>/dev/null
yum makecache &>/dev/null } echo "脚本正在进行网络连接测试,请稍后..."
ping www.baidu.com -c2 &>/dev/null ||(echo "无法连同外网,或者DNS解析有问题,本脚本运行环境必须和外网相连!" && exit)
YumBuild
ServerSystemOptimize

第二步:本地测试脚本功能

[root@m01 ~]# sh /server/scripts/server_uptimize.sh
脚本正在进行网络连接测试,请稍后...
正在安装epel源yum仓库,请稍后...
*****************脚本开始尝试对服务器进行一些必要的优化....**********************
防火墙已经关闭!
SElinux 已关闭!
防火墙已经取消开机启动!
SElinux已经取消开机启动!
Linux启动运行级别已经永久设置为3!
脚本已经关闭Linux不必要服务的开机自启动!

第三步:用ansible进行脚本批量分发

[root@m01 ~]# ansible chensiqi -m copy -a "src=/server/scripts/server_uptimize.sh dest=/server/scripts/  backup=yes"
172.16.1.6 | SUCCESS => {
"changed": true,
"checksum": "9d508da8cce8830722ac38ad274361601d33f43e",
"dest": "/server/scripts/server_uptimize.sh",
"gid": 0,
"group": "root",
"md5sum": "efeaffe8266992c190c1055241458259",
"mode": "0644",
"owner": "root",
"secontext": "system_u:object_r:default_t:s0",
"size": 1600,
"src": "/root/.ansible/tmp/ansible-tmp-1489449184.22-105813674245985/source",
"state": "file",
"uid": 0
}
172.16.1.5 | SUCCESS => {
"changed": true,
"checksum": "9d508da8cce8830722ac38ad274361601d33f43e",
"dest": "/server/scripts/server_uptimize.sh",
"gid": 0,
"group": "root",
"md5sum": "efeaffe8266992c190c1055241458259",
"mode": "0644",
"owner": "root",
"secontext": "system_u:object_r:default_t:s0",
"size": 1600,
"src": "/root/.ansible/tmp/ansible-tmp-1489449184.22-102726815232979/source",
"state": "file",
"uid": 0
}
172.16.1.51 | SUCCESS => {
"changed": true,
"checksum": "9d508da8cce8830722ac38ad274361601d33f43e",
"dest": "/server/scripts/server_uptimize.sh",
"gid": 0,
"group": "root",
"md5sum": "efeaffe8266992c190c1055241458259",
"mode": "0644",
"owner": "root",
"secontext": "system_u:object_r:default_t:s0",
"size": 1600,
"src": "/root/.ansible/tmp/ansible-tmp-1489449184.26-180721242166387/source",
"state": "file",
"uid": 0
}
172.16.1.41 | SUCCESS => {
"changed": false,
"checksum": "9d508da8cce8830722ac38ad274361601d33f43e",
"dest": "/server/scripts/server_uptimize.sh",
"gid": 0,
"group": "root",
"mode": "0644",
"owner": "root",
"path": "/server/scripts/server_uptimize.sh",
"secontext": "system_u:object_r:default_t:s0",
"size": 1600,
"state": "file",
"uid": 0
}
172.16.1.31 | SUCCESS => {
"changed": false,
"checksum": "9d508da8cce8830722ac38ad274361601d33f43e",
"dest": "/server/scripts/server_uptimize.sh",
"gid": 0,
"group": "root",
"mode": "0644",
"owner": "root",
"path": "/server/scripts/server_uptimize.sh",
"secontext": "system_u:object_r:default_t:s0",
"size": 1600,
"state": "file",
"uid": 0
}
172.16.1.8 | SUCCESS => {
"changed": false,
"checksum": "9d508da8cce8830722ac38ad274361601d33f43e",
"dest": "/server/scripts/server_uptimize.sh",
"gid": 0,
"group": "root",
"mode": "0644",
"owner": "root",
"path": "/server/scripts/server_uptimize.sh",
"secontext": "system_u:object_r:default_t:s0",
"size": 1600,
"state": "file",
"uid": 0
}
172.16.1.7 | SUCCESS => {
"changed": false,
"checksum": "9d508da8cce8830722ac38ad274361601d33f43e",
"dest": "/server/scripts/server_uptimize.sh",
"gid": 0,
"group": "root",
"mode": "0644",
"owner": "root",
"path": "/server/scripts/server_uptimize.sh",
"secontext": "system_u:object_r:default_t:s0",
"size": 1600,
"state": "file",
"uid": 0
}

第四步:用ansible批量执行脚本

[root@m01 ~]# ansible chensiqi -m shell -a "sh /server/scripts/server_uptimize.sh"
172.16.1.5 | SUCCESS | rc=0 >>
脚本正在进行网络连接测试,请稍后...
正在安装epel源yum仓库,请稍后...
*****************脚本开始尝试对服务器进行一些必要的优化....**********************
防火墙已经关闭!
SElinux 已关闭!
防火墙已经取消开机启动!
SElinux已经取消开机启动!
Linux启动运行级别已经永久设置为3!
脚本已经关闭Linux不必要服务的开机自启动! 172.16.1.6 | SUCCESS | rc=0 >>
脚本正在进行网络连接测试,请稍后...
正在安装epel源yum仓库,请稍后...
*****************脚本开始尝试对服务器进行一些必要的优化....**********************
防火墙已经关闭!
SElinux 已关闭!
防火墙已经取消开机启动!
SElinux已经取消开机启动!
Linux启动运行级别已经永久设置为3!
脚本已经关闭Linux不必要服务的开机自启动! 172.16.1.31 | SUCCESS | rc=0 >>
脚本正在进行网络连接测试,请稍后...
正在安装epel源yum仓库,请稍后...
*****************脚本开始尝试对服务器进行一些必要的优化....**********************
防火墙已经关闭!
SElinux 已关闭!
防火墙已经取消开机启动!
SElinux已经取消开机启动!
Linux启动运行级别已经永久设置为3!
脚本已经关闭Linux不必要服务的开机自启动! 172.16.1.41 | SUCCESS | rc=0 >>
脚本正在进行网络连接测试,请稍后...
正在安装epel源yum仓库,请稍后...
*****************脚本开始尝试对服务器进行一些必要的优化....**********************
防火墙已经关闭!
SElinux 已关闭!
防火墙已经取消开机启动!
SElinux已经取消开机启动!
Linux启动运行级别已经永久设置为3!
脚本已经关闭Linux不必要服务的开机自启动! 172.16.1.51 | SUCCESS | rc=0 >>
脚本正在进行网络连接测试,请稍后...
正在安装epel源yum仓库,请稍后...
*****************脚本开始尝试对服务器进行一些必要的优化....**********************
防火墙已经关闭!
SElinux 已关闭!
防火墙已经取消开机启动!
SElinux已经取消开机启动!
Linux启动运行级别已经永久设置为3!
脚本已经关闭Linux不必要服务的开机自启动! 172.16.1.8 | SUCCESS | rc=0 >>
脚本正在进行网络连接测试,请稍后...
正在安装epel源yum仓库,请稍后...
*****************脚本开始尝试对服务器进行一些必要的优化....**********************
防火墙已经关闭!
SElinux 已关闭!
防火墙已经取消开机启动!
SElinux已经取消开机启动!
Linux启动运行级别已经永久设置为3!
脚本已经关闭Linux不必要服务的开机自启动! 172.16.1.7 | SUCCESS | rc=0 >>
脚本正在进行网络连接测试,请稍后...
正在安装epel源yum仓库,请稍后...
*****************脚本开始尝试对服务器进行一些必要的优化....**********************
防火墙已经关闭!
SElinux 已关闭!
防火墙已经取消开机启动!
SElinux已经取消开机启动!
Linux启动运行级别已经永久设置为3!
脚本已经关闭Linux不必要服务的开机自启动!
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