ansible配置及简单操作

一时失言乱红尘 2022-07-12 11:49 275阅读 0赞

ansible配置及简单操作  
  
  
一、免密SSH密钥  
1、在Ansible服务端生成密钥，并且复制公钥到节点中。  
\[root@elb ~\]\# ssh-keygen  
Generating public/private rsa key pair.  
Enter file in which to save the key (/root/.ssh/id\_rsa):   
Enter passphrase (empty for no passphrase):   
Enter same passphrase again:   
Your identification has been saved in /root/.ssh/id\_rsa.  
Your public key has been saved in /root/.ssh/id\_rsa.pub.  
The key fingerprint is:  
89:13:34:37:96:34:ae:38:1e:c9:de:cf:d2:87:d3:e1 root@elb  
The key's randomart image is:  
\+--\[ RSA 2048\]----+  
|      o.\*.       |  
|     . =.o       |  
|      . .        |  
|   . o + .       |  
|    \* + S        |  
|   o + .  .      |  
|    o .. + .     |  
|      .o+ E      |  
|       .oo       |  
\+-----------------+  
  
  
2、使用ssh-copy-id命令来复制Ansible公钥到节点中。  
客户端主机  
192.168.3.49  
192.168.3.62  
\[root@elb ~\]\# ssh-copy-id -i /root/.ssh/id\_rsa.pub root@192.168.3.49  
The authenticity of host '192.168.3.49 (192.168.3.49)' can't be established.  
RSA key fingerprint is 5f:73:2a:96:12:c8:1d:af:d8:d4:a7:0d:53:db:0c:81.  
Are you sure you want to continue connecting (yes/no)? yes  
Warning: Permanently added '192.168.3.49' (RSA) to the list of known hosts.  
root@192.168.3.49's password:   
Now try logging into the machine, with "ssh 'root@192.168.3.49'", and check in:  
  
  .ssh/authorized\_keys  
  
to make sure we haven't added extra keys that you weren't expecting.  
  
\[root@elb ~\]\#   
\[root@elb ~\]\# ssh-copy-id -i /root/.ssh/id\_rsa.pub root@192.168.3.62  
The authenticity of host '192.168.3.62 (192.168.3.62)' can't be established.  
RSA key fingerprint is 50:d1:85:98:0c:9f:b8:04:9e:01:c9:94:79:9e:a6:f1.  
Are you sure you want to continue connecting (yes/no)? yes  
Warning: Permanently added '192.168.3.62' (RSA) to the list of known hosts.  
root@192.168.3.62's password:   
Now try logging into the machine, with "ssh 'root@192.168.3.62'", and check in:  
  
  
  .ssh/authorized\_keys  
  
to make sure we haven't added extra keys that you weren't expecting.  
  
测试免密登录  
\[root@elb ~\]\# ssh 192.168.3.49  
Last login: Thu Jan  5 08:49:13 2017 from 192.168.3.41  
\[root@nginx ~\]\# exit  
logout  
Connection to 192.168.3.49 closed.  
\[root@elb ~\]\# ssh 192.168.3.62  
Last login: Mon Nov 14 20:53:20 2016 from 192.168.3.41  
\[root@mysql ~\]\# exit  
logout  
Connection to 192.168.3.62 closed.  
  
二、为Ansible定义节点的清单  
\[root@elb ~\]\# vi /etc/ansible/hosts  
\# This is the default ansible 'hosts' file.  
\#  
\# It should live in /etc/ansible/hosts  
\#  
\#   - Comments begin with the '\#' character  
\#   - Blank lines are ignored  
\#   - Groups of hosts are delimited by \[header\] elements  
\#   - You can enter hostnames or ip addresses  
\#   - A hostname/ip can be a member of multiple groups  
  
  
\# Ex 1: Ungrouped hosts, specify before any group headers.  
  
  
\#\# green.example.com  
\#\# blue.example.com  
\#\# 192.168.100.1  
\#\# 192.168.100.10  
  
\# Ex 2: A collection of hosts belonging to the 'webservers' group  
  
\[webservers\]  
\#\# alpha.example.org  
\#\# beta.example.org  
\#\# 192.168.1.100  
\#\# 192.168.1.110  
192.168.3.49  
\# If you have multiple hosts following a pattern you can specify  
\# them like this:  
  
  
\#\# www\[001:006\].example.com  
  
\# Ex 3: A collection of database servers in the 'dbservers' group  
  
\[dbservers\]  
\#\#  
\#\# db01.intranet.mydomain.net  
\#\# db02.intranet.mydomain.net  
\#\# 10.25.1.56  
\#\# 10.25.1.57  
192.168.3.62  
\# Here's another example of host ranges, this time there are no  
\# leading 0s:  
  
  
\#\# db-\[99:101\]-node.example.com  
  
三、在Ansible服务端运行命令  
需要在远程执行一个个命令来管理远程服务器；  
远程执行命令的模块有command、shell、scripts、以及raw模块；

官方http://docs.ansible.com/ansible/list\_of\_commands\_modules.html

command模块  
使用ping检查webservers、dbservers或者ansible节点的连通性  
ansible -m ping 'dbservers'  
  
\[root@elb ~\]\# ansible -m ping 'webservers'  
192.168.3.49 | SUCCESS => \{  
    "changed": false,   
    "ping": "pong"  
\}  
\[root@elb ~\]\# ansible -m ping 'dbservers'  
192.168.3.62 | SUCCESS => \{  
    "changed": false,   
    "ping": "pong"  
\}  
  
  
例子1：检查Ansible节点的运行时间（uptime）  
ansible -m command -a "uptime" 'webservers'  
  
\[root@elb ~\]\# ansible -m command -a "uptime" 'webservers'  
192.168.3.49 | SUCCESS | rc=0 >>  
 09:11:49 up  3:25,  5 users,  load average: 0.08, 0.02, 0.01  
  
\[root@elb ~\]\# ansible -m command -a "uptime" 'dbservers'   
192.168.3.62 | SUCCESS | rc=0 >>  
 21:05:37 up 10:58,  6 users,  load average: 0.00, 0.00, 0.00  
  
\[root@elb ~\]\#   
  
例子2：检查节点的内核版本  
ansible -m command -a "uname -r" 'webservers'  
ansible -m command -a "uname -r" 'dbservers'   
  
\[root@elb ~\]\# ansible -m command -a "uname -r" 'webservers'  
192.168.3.49 | SUCCESS | rc=0 >>  
2.6.32-642.6.2.el6.x86\_64  
  
\[root@elb ~\]\# ansible -m command -a "uname -r" 'dbservers'   
192.168.3.62 | SUCCESS | rc=0 >>  
2.6.32-642.6.2.el6.x86\_64  
  
  
例子3：给节点增加用户  
ansible -m command -a "useradd wolf" 'webservers'  
ansible -m command -a "useradd wolf" 'dbservers'   
  
\[root@elb ~\]\# ansible -m command -a "useradd wolf" 'webservers'  
192.168.3.49 | SUCCESS | rc=0 >>  
  
\[root@elb ~\]\# ansible -m command -a "useradd wolf" 'dbservers'   
192.168.3.62 | SUCCESS | rc=0 >>  
  
ansible -m command -a "grep wolf /etc/passwd" 'webservers'  
ansible -m command -a "grep wolf /etc/passwd" 'dbservers'   
  
例子4：重定向输出到文件中  
ansible -m command -a "df -Th" 'webservers'>/tmp/command-output.txt  
ansible -m command -a "df -Th" 'dbservers'>>/tmp/command-output.txt  
  
\[root@elb ~\]\# ansible -m command -a "df -Th" 'webservers'>/tmp/command-output.txt  
\[root@elb ~\]\# cat /tmp/command-output.txt  
192.168.3.49 | SUCCESS | rc=0 >>  
Filesystem           Type     Size  Used Avail Use% Mounted on  
/dev/mapper/vg\_nginx-lv\_root  
                     ext4      18G  5.6G   11G  34% /  
tmpfs                tmpfs    491M  228K  491M   1% /dev/shm  
/dev/sda1            ext4     477M   60M  392M  14% /boot  
/dev/sr0             iso9660  4.2G  4.2G     0 100% /media/CentOS\_6.5\_Final  
\[root@elb ~\]\# ansible -m command -a "df -Th" 'dbservers'>>/tmp/command-output.txt  
\[root@elb ~\]\# cat /tmp/command-output.txt                                          
192.168.3.49 | SUCCESS | rc=0 >>  
Filesystem           Type     Size  Used Avail Use% Mounted on  
/dev/mapper/vg\_nginx-lv\_root  
                     ext4      18G  5.6G   11G  34% /  
tmpfs                tmpfs    491M  228K  491M   1% /dev/shm  
/dev/sda1            ext4     477M   60M  392M  14% /boot  
/dev/sr0             iso9660  4.2G  4.2G     0 100% /media/CentOS\_6.5\_Final  
192.168.3.62 | SUCCESS | rc=0 >>  
Filesystem           Type   Size  Used Avail Use% Mounted on  
/dev/mapper/vg\_mysql-lv\_root  
                     ext4    18G  7.1G  9.3G  44% /  
tmpfs                tmpfs  931M  320K  931M   1% /dev/shm  
/dev/sda1            ext4   477M   60M  392M  14% /boot  
  
  
copy模块  
ansible 'webservers' -m copy -a "src=/root/wolf.txt dest=~/"  
ansible 'dbservers' -m copy -a "src=/root/wolf.txt dest=~/"  
  
  
\[root@elb ~\]\# ansible 'webservers' -m copy -a "src=/root/wolf.txt dest=~/"  
192.168.3.49 | SUCCESS => \{  
    "changed": true,   
    "checksum": "da39a3ee5e6b4b0d3255bfef95601890afd80709",   
    "dest": "/root/wolf.txt",   
    "gid": 0,   
    "group": "root",   
    "md5sum": "d41d8cd98f00b204e9800998ecf8427e",   
    "mode": "0644",   
    "owner": "root",   
    "size": 0,   
    "src": "/root/.ansible/tmp/ansible-tmp-1480402539.29-166423323929037/source",   
    "state": "file",   
    "uid": 0  
\}  
\[root@elb ~\]\# ansible 'dbservers' -m copy -a "src=/root/wolf.txt dest=~/"  
192.168.3.62 | SUCCESS => \{  
    "changed": true,   
    "checksum": "da39a3ee5e6b4b0d3255bfef95601890afd80709",   
    "dest": "/root/wolf.txt",   
    "gid": 0,   
    "group": "root",   
    "md5sum": "d41d8cd98f00b204e9800998ecf8427e",   
    "mode": "0644",   
    "owner": "root",   
    "size": 0,   
    "src": "/root/.ansible/tmp/ansible-tmp-1480402545.85-144739460041681/source",   
    "state": "file",   
    "uid": 0  
\}  
  
  
shell模块  
执行shell命令  
ansible 'webservers'  -a "ps -fe |grep nginx" -m shell  
ansible 'dbservers'  -a "ps -fe |grep mysql" -m shell  
\[root@elb ~\]\# ansible 'dbservers'  -a "ps -fe |grep mysql" -m shell  
192.168.3.62 | SUCCESS | rc=0 >>  
root      95353  95352  0 22:12 pts/1    00:00:00 /bin/sh -c ps -fe |grep mysql  
root      95355  95353  0 22:12 pts/1    00:00:00 grep mysql  
root     100297      1  0 12:07 ?        00:00:00 /bin/sh /soft/mysql5.1.72/bin/mysqld\_safe --datadir=/soft/mysql5.1.72/data --pid-file=/soft/mysql5.1.72/data/mysql.pid  
mysql    100414 100297  0 12:07 ?        00:00:14 /soft/mysql5.1.72/libexec/mysqld --basedir=/soft/mysql5.1.72 --datadir=/soft/mysql5.1.72/data --user=mysql --log-error=/soft/mysql5.1.72/data/mysql.err --pid-file=/soft/mysql5.1.72/data/mysql.pid --socket=/soft/mysql5.1.72/tmp/mysql.sock --port=3306  
  
  
\[root@elb ~\]\# ansible 'webservers'  -a "ps -fe |grep nginx" -m shell  
192.168.3.49 | SUCCESS | rc=0 >>  
root       1992      1  0 05:47 ?        00:00:00 /bin/sh /data/mysql/bin/mysqld\_safe --datadir=/data/db --pid-file=/data/db/nginx.pid  
mysql      2320   1992  0 05:47 ?        00:00:11 /data/mysql/bin/mysqld --basedir=/data/mysql --datadir=/data/db --plugin-dir=/data/mysql/lib/plugin --user=mysql --log-error=/data/db/nginx.err --pid-file=/data/db/nginx.pid --socket=/tmp/mysql.sock --port=3306  
nginx      2325   2324  0 05:47 ?        00:00:00 php-fpm: pool www       
nginx      2326   2324  0 05:47 ?        00:00:00 php-fpm: pool www       
nginx      2327   2324  0 05:47 ?        00:00:00 php-fpm: pool www       
nginx      2328   2324  0 05:47 ?        00:00:00 php-fpm: pool www       
nginx      2329   2324  0 05:47 ?        00:00:00 php-fpm: pool www       
nginx      2330   2324  0 05:47 ?        00:00:00 php-fpm: pool www       
nginx      2331   2324  0 05:47 ?        00:00:00 php-fpm: pool www       
nginx      2332   2324  0 05:47 ?        00:00:00 php-fpm: pool www       
nginx      2333   2324  0 05:47 ?        00:00:00 php-fpm: pool www       
nginx      2334   2324  0 05:47 ?        00:00:00 php-fpm: pool www       
nginx      2335   2324  0 05:47 ?        00:00:00 php-fpm: pool www       
nginx      2336   2324  0 05:47 ?        00:00:00 php-fpm: pool www       
nginx      2337   2324  0 05:47 ?        00:00:00 php-fpm: pool www       
nginx      2338   2324  0 05:47 ?        00:00:00 php-fpm: pool www       
nginx      2339   2324  0 05:47 ?        00:00:00 php-fpm: pool www       
nginx      2340   2324  0 05:47 ?        00:00:00 php-fpm: pool www       
root       2342      1  0 05:47 ?        00:00:00 nginx: master process /data/nginx/sbin/nginx  
nginx      2345   2342  0 05:47 ?        00:00:01 nginx: worker process   
nginx      2346   2342  0 05:47 ?        00:00:00 nginx: worker process   
root       6726   6725  0 10:18 pts/1    00:00:00 /bin/sh -c ps -fe |grep nginx  
root       6728   6726  0 10:18 pts/1    00:00:00 grep nginx

scripts模块  
\[root@elb ~\]\# vi ll.sh   
ls  
\[root@elb ~\]\# sh ll.sh   
anaconda-ks.cfg  Desktop  Documents  Downloads  install.log  install.log.syslog  ll.sh  Music  Pictures  Public  Templates  Videos  wolf.txt  
  
  
ansible webservers  -m script -a "/root/ll.sh"  
ansible dbservers  -m script -a "/root/ll.sh"  
  
  
webservers 上  
\[root@nginx ~\]\# touch 111  
dbservers上  
\[root@mysql ~\]\# touch 132  
\[root@elb ~\]\# ansible webservers  -m script -a "/root/ll.sh"  
192.168.3.49 | SUCCESS => \{  
    "changed": true,   
    "rc": 0,   
    "stderr": "Shared connection to 192.168.3.49 closed.\\r\\n",   
    "stdout": "111\\t\\t Documents    install.log.syslog  Public     wolf.txt\\r\\nanaconda-ks.cfg  Downloads    Music\\t\\t  Templates\\r\\nDesktop\\t\\t install.log  Pictures\\t\\t  Videos\\r\\n",   
    "stdout\_lines": \[  
        "111\\t\\t Documents    install.log.syslog  Public     wolf.txt",   
        "anaconda-ks.cfg  Downloads    Music\\t\\t  Templates",   
        "Desktop\\t\\t install.log  Pictures\\t\\t  Videos"  
    \]  
\}  
\[root@elb ~\]\# ansible dbservers  -m script -a "/root/ll.sh"   
192.168.3.62 | SUCCESS => \{  
    "changed": true,   
    "rc": 0,   
    "stderr": "Shared connection to 192.168.3.62 closed.\\r\\n",   
    "stdout": "132\\t\\t Documents    install.log.syslog  Public     Videos\\r\\nanaconda-ks.cfg  Downloads    Music\\t\\t  soft\\t     wolf.txt\\r\\nDesktop\\t\\t install.log  Pictures\\t\\t  Templates\\r\\n",   
    "stdout\_lines": \[  
        "132\\t\\t Documents    install.log.syslog  Public     Videos",   
        "anaconda-ks.cfg  Downloads    Music\\t\\t  soft\\t     wolf.txt",   
        "Desktop\\t\\t install.log  Pictures\\t\\t  Templates"  
    \]  
\}