运维自动化之ansible playbook一键化解决大量主机bash更新问题
今天发现有bash漏洞，但我这里近1000台服务器，为了方便、省时间，觉得使用ansible安装bash更新包，下面分享一下我的安装方法。1、安装的playbook的内容
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19:00:03 # cd /etc/ansible
root@ip-10-10-10-10:/etc/ansible
19:00:06 # cat update_bash.yml
---
- hosts: "{{ host }}"
remote_user: "{{ user }}"
gather_facts: True
tasks:
- name: update bash in redhat 6 version
yum: name=http://mirrors.hustunique.com/centos/6/updates/x86_64/Packages/bash-4.1.2-15.el6_5.2.x86_64.rpm state=present
when: ansible_os_family == "RedHat" and ansible_distribution_version|int >=6
- name: update bash in redhat 5 version
yum: name=http://mirrors.hustunique.com/centos/5/updates/x86_64/RPMS/bash-3.2-33.el5.2.x86_64.rpm state=present
when: ansible_os_family == "RedHat" and ansible_distribution_version|int <=5
会自动判断系统版本，然后安装不同的包，本来想弄好yum的update源，但发现还在更新，觉得麻烦就还自己安装文件了。
2、安装前测试系统（centos 6系统）
为了测试需要，使用docker虚拟个容器
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16:32:46 # ssh 172.17.0.9
The authenticity of host '172.17.0.9 (172.17.0.9)' can't be established.
RSA key fingerprint is 39:7c:13:9f:d4:b0:d7:63:fc:ff:ae:e3:46:a4:bf:6b.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '172.17.0.9' (RSA) to the list of known hosts.
root@172.17.0.9's password:
Last login: Thu Sep 25 16:31:32 2014 from 172.17.42.1
root@86fb0b4bbb0b:~
16:35:04 #env x='() { :;}; echo vulnerable' bash -c "echo this is a test"
vulnerable
this is a test
可以看到是有bash漏洞的
3、使用ansible playbook升级bash
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16:35:08 # time ansible-playbook update_bash.yml--extra-vars "host=172.17.0.9 user=root" -k
SSH password:
PLAY *************************************************************
GATHERING FACTS ***************************************************************
ok:
TASK: ***************************************
changed:
TASK: ***************************************
skipping:
PLAY RECAP ********************************************************************
172.17.0.9 : ok=2 changed=1 unreachable=0 failed=0
real 0m35.901s
user 0m0.952s
sys 0m0.216s
4、查看是否有漏洞
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root@ip-10-10-10-10:/etc/ansible
16:36:01 # ssh 172.17.0.9
root@172.17.0.9's password:
Last login: Thu Sep 25 16:35:57 2014 from 172.17.42.1
root@86fb0b4bbb0b:~
16:36:11 #env x='() { :;}; echo vulnerable' bash -c "echo this is a test"
bash: warning: x: ignoring function definition attempt
bash: error importing function definition for `x'
this is a test
root@86fb0b4bbb0b:~
可以看到漏洞已经解决了。
完成的截图为
如果有大量主机，就在运行的时候加上-f然后选择一个合适的并发主机数量即可，我这里使用了这个，很快的就升级完成bash了。
希望对大家批量更新bash有益。
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