Ansible批量修改远程主机用户密码 (ansible批量做ssh互信) – 散尽浮华

by 散尽浮华

博客园_散尽浮华 / 2019-03-26 18:41

按照集团运维信息安全制度, 需要每个一段时间对线上服务器密码进行一次变更,通过shell脚本部署比较繁琐,所以决定采用ansible脚本对远程主机root密码进行批量重置,该脚本已经在稳定运行在正式环境下。具体方法如下:

1)  在服务端安装ansible

[root@ansible-server ~]# yum install -y ansible  

2) 配置ansible到远程主机的ssh无密码信任关系 (authoried_keys 模块)

批量实现多台服务器之间ssh无密码登录的相互信任关系, 可以参考之前的文章:  https://www.cnblogs.com/kevingrace/p/9063745.html  这里采用Ansible 实现批量建立互信, 方法如下:    首先要生成ansible服务端本机ssh的key   [root@ansible-server ~]# ssh-keygen -t rsa          //一路回车  [root@ansible-server ~]# ls /root/.ssh/  id_rsa  id_rsa.pub     ====================================================  需要注意ssh建立互信的命令格式:  # ssh-copy-id -i ~/.ssh/id_rsa.pub username@[ip,hostname]  ====================================================    在客户机比较多的情况下,使用 ssh-copy-id命令的方法显然是有些费时,使用ansible-playbook 推送 ymal进行批量创建ssh互信关系就显得省事多了,  这里就使用到了ansible的authoried_keys 模块:     首先要配置ansible清单 (远程主机的密码这里为"123456")  [root@ansible-server ~]# vim /etc/ansible/hosts  ................  ................  [ssh-host]  172.16.60.204  172.16.60.205  172.16.60.206  172.16.60.207    [ssh-host:vars]  ansible_ssh_pass="123456"    ==========================================================  发送公钥到目标机器命令格式如下:  # ansible ssh-host -m copy -a "src=/root/.ssh/id_rsa.pub dest=/root/.ssh/authorized_keys mode=600"  ==========================================================    编写playbook文件  [root@ansible-server ~]# vim /opt/ssh_key.yaml  ---    - hosts: ssh-host      user: root      tasks:       - name: ssh-copy         authorized_key: user=root key="{{ lookup('file', '/root/.ssh/id_rsa.pub') }}"    注意上面yaml脚本中的"ssh-key-host"是在/etc/ansible/hosts清单文件里配置的远程客户机列表  这里做的是基于远程主机root用户的ssh互信    执行批量互信  [root@ansible-server ~]# ansible-playbook /opt/ssh_key.yaml    PLAY [ssh-host] ************************************************************************************************************************    TASK [Gathering Facts] *****************************************************************************************************************  ok: [172.16.60.204]  ok: [172.16.60.205]  ok: [172.16.60.206]  ok: [172.16.60.207]    TASK [ssh-copy] ************************************************************************************************************************  changed: [172.16.60.205]  changed: [172.16.60.204]  changed: [172.16.60.206]  changed: [172.16.60.207]    PLAY RECAP *****************************************************************************************************************************  172.16.60.204              : ok=2    changed=1    unreachable=0    failed=0     172.16.60.205              : ok=2    changed=1    unreachable=0    failed=0     172.16.60.206              : ok=2    changed=1    unreachable=0    failed=0     172.16.60.207              : ok=2    changed=1    unreachable=0    failed=0    最后验证下ssh互信  [root@ansible-server ~]# ansible -i /etc/ansible/hosts ssh-host -m shell -a "whoami"  172.16.60.204 | SUCCESS | rc=0 >>  root    172.16.60.205 | SUCCESS | rc=0 >>  root    172.16.60.207 | SUCCESS | rc=0 >>  root    172.16.60.206 | SUCCESS | rc=0 >>  root    至此, ansible批量创建到远程客户机的ssh信任关系已经实现了!  

3) Ansible批量更新远程主机用户密码方法

方法一:  使用Ansible的user模块批量修改远程客户机的用户密码

由于在使用ansible修改用户密码的时候不能使用明文的方式,需要先加密,所以就需要使用一个方法对输入的明文的密码进行加密.  废话不多说了. 下面直接记录下操作方法:    [root@ansible-server ~]# vim /opt/root_passwd.yaml  ---    - hosts: ssh-host      gather_facts: false      tasks:      - name: change user passwd        user: name={{ item.name }} password={{ item.chpass | password_hash('sha512') }}  update_password=always        with_items:             - { name: 'root', chpass: 'kevin@123' }             - { name: 'app', chpass: 'bjop123' }    注意上面在yaml文件中修改了远程客户机的root用户密码, app用户密码.   如果还想要修改其他用户密码, 则继续按照上面规则添加即可!    执行ansible-play  [root@ansible-server ~]# ansible-playbook /opt/root_passwd.yaml     PLAY [ssh-host] ************************************************************************************************************************    TASK [change user passwd] **************************************************************************************************************  changed: [172.16.60.204] => (item={u'chpass': u'kevin@123', u'name': u'root'})  changed: [172.16.60.205] => (item={u'chpass': u'kevin@123', u'name': u'root'})  changed: [172.16.60.204] => (item={u'chpass': u'bjop123', u'name': u'app'})  changed: [172.16.60.205] => (item={u'chpass': u'bjop123', u'name': u'app'})  changed: [172.16.60.206] => (item={u'chpass': u'kevin@123', u'name': u'root'})  changed: [172.16.60.206] => (item={u'chpass': u'bjop123', u'name': u'app'})  changed: [172.16.60.207] => (item={u'chpass': u'kevin@123', u'name': u'root'})  changed: [172.16.60.207] => (item={u'chpass': u'bjop123', u'name': u'app'})    PLAY RECAP *****************************************************************************************************************************  172.16.60.204              : ok=1    changed=1    unreachable=0    failed=0     172.16.60.205              : ok=1    changed=1    unreachable=0    failed=0     172.16.60.206              : ok=1    changed=1    unreachable=0    failed=0     172.16.60.207              : ok=1    changed=1    unreachable=0    failed=0   

方法二修改远程主机的单个用户密码使用此方法比较方便

编写playbook文件  [root@ansible-server ~]# vim /opt/root_passwd2.yaml  ---    - hosts: ssh-host      gather_facts: false      tasks:      - name: Change password        user: name={{ name1 }}  password={{ chpass | password_hash('sha512') }}  update_password=always    执行ansible-playbook,  使用-e参数传递用户名和密码给剧本,其中root为用户名,admin#123就是修改后的root密码  [root@ansible-server ~]# ansible-playbook /opt/root_passwd2.yaml -e "name1=root chpass=admin#123"                PLAY [ssh-host] ************************************************************************************************************************    TASK [Change password] *****************************************************************************************************************  changed: [172.16.60.204]  changed: [172.16.60.205]  changed: [172.16.60.206]  changed: [172.16.60.207]    PLAY RECAP *****************************************************************************************************************************  172.16.60.204              : ok=1    changed=1    unreachable=0    failed=0     172.16.60.205              : ok=1    changed=1    unreachable=0    failed=0     172.16.60.206              : ok=1    changed=1    unreachable=0    failed=0     172.16.60.207              : ok=1    changed=1    unreachable=0    failed=0  

方法三:  使用如下Ansible脚本, 适用于修改清单中部分远程主机的用户密码

编写ansible-playbook脚本 (需要注意下面脚本中"ens192"是客户机ip所在的网卡设备名称, 这个要根据自己实际环境去配置, 比如eth0, eth1等)  [root@ansible-server ~]# cat /opt/root_passwd4.yaml   - hosts: test-host    remote_user: root    tasks:    - name: change password for root      shell: echo '{{ item.password }}' |passwd --stdin root      when: ansible_ens192.ipv4.address  == '{{ item.ip }}'      with_items:       - { ip: "172.16.60.220", password: 'haha@123' }       - { ip: "172.16.60.221", password: 'kevin@123' }       - { ip: "172.16.60.222", password: 'bobo@123' }     执行ansible-playbook:   [root@ansible-server ansible]# ansible-playbook /opt/root_passwd3.yaml    PLAY [ssh-host] ************************************************************************************************************************    TASK [Gathering Facts] *****************************************************************************************************************  ok: [172.16.60.204]  ok: [172.16.60.205]  ok: [172.16.60.206]  ok: [172.16.60.207]    TASK [change password for root] ********************************************************************************************************   [WARNING]: when statements should not include jinja2 templating delimiters such as {{ }} or {% %}. Found: ansible_eth0.ipv4.address  == '{{ item.ip }}'     [WARNING]: when statements should not include jinja2 templating delimiters such as {{ }} or {% %}. Found: ansible_eth0.ipv4.address  == '{{ item.ip }}'    skipping: [172.16.60.205] => (item={u'ip': u'172.16.60.204', u'password': u'haha@123'})    [WARNING]: when statements should not include jinja2 templating delimiters such as {{ }} or {% %}. Found: ansible_eth0.ipv4.address  == '{{ item.ip }}'    skipping: [172.16.60.206] => (item={u'ip': u'172.16.60.204', u'password': u'haha@123'})   skipping: [172.16.60.206] => (item={u'ip': u'172.16.60.205', u'password': u'kevin@123'})    [WARNING]: when statements should not include jinja2 templating delimiters such as {{ }} or {% %}. Found: ansible_eth0.ipv4.address  == '{{ item.ip }}'    skipping: [172.16.60.207] => (item={u'ip': u'172.16.60.204', u'password': u'haha@123'})   skipping: [172.16.60.207] => (item={u'ip': u'172.16.60.205', u'password': u'kevin@123'})   skipping: [172.16.60.207] => (item={u'ip': u'172.16.60.206', u'password': u'bobo@123'})   changed: [172.16.60.205] => (item={u'ip': u'172.16.60.205', u'password': u'kevin@123'})  skipping: [172.16.60.205] => (item={u'ip': u'172.16.60.206', u'password': u'bobo@123'})   changed: [172.16.60.204] => (item={u'ip': u'172.16.60.204', u'password': u'haha@123'})  skipping: [172.16.60.204] => (item={u'ip': u'172.16.60.205', u'password': u'kevin@123'})   skipping: [172.16.60.204] => (item={u'ip': u'172.16.60.206', u'password': u'bobo@123'})   changed: [172.16.60.206] => (item={u'ip': u'172.16.60.206', u'password': u'bobo@123'})    PLAY RECAP *****************************************************************************************************************************  172.16.60.204              : ok=2    changed=1    unreachable=0    failed=0     172.16.60.205              : ok=2    changed=1    unreachable=0    failed=0     172.16.60.206              : ok=2    changed=1    unreachable=0    failed=0     172.16.60.207              : ok=1    changed=0    unreachable=0    failed=0

                                                                                                                                                                           

如果ansible服务端没有和远程主机做ssh信任关系, 则可以在hosts清单配置里直接指明用户名和密码.  如果使用普通用户, 并且允许sudo, 则需要提前在客户机里的/etc/sudoers文件里配置好该普通用户的sudo配置, 即允许该普通用户有sudo权限.     [root@ansible-server ~]# vim /etc/ansible/hosts  ................  [test-host]  172.16.60.220 ansible_ssh_user=root ansible_ssh_pass=123456 ansible_ssh_port=22  172.16.60.221 ansible_ssh_user=root ansible_ssh_pass=bo@123 ansible_ssh_port=22  172.16.60.222 ansible_ssh_user=app ansible_ssh_pass=bj@123 ansible_ssh_port=22 ansible_sudo_pass=bj@123     即172.16.60.220客户机上要提前配置, 允许app用户具有sudo权限.    执行:  [root@ansible-server ~]# ansible test-host -m shell -a "hostname"                        172.16.60.222 | SUCCESS | rc=0 >>  k8s-node02    172.16.60.220 | SUCCESS | rc=0 >>  k8s-master01    172.16.60.221 | SUCCESS | rc=0 >>  k8s-node01    [root@ansible-server ~]# ansible -i /etc/ansible/hosts test-host -m shell -a "hostname"  172.16.60.222 | SUCCESS | rc=0 >>  k8s-node02    172.16.60.220 | SUCCESS | rc=0 >>  k8s-master01    172.16.60.221 | SUCCESS | rc=0 >>  k8s-node01

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