安装ansible
测试机器环境
3台centos7.5
ip1:192.168.12.14ip2:192.168.12.15ip3:192.168.12.16
ip1为主服务器安装控制端
默认yum安装就好,命令如下: [root@wsn-ansible1 ~]# yum -y install ansible[root@wsn-ansbile1 ~]# ansible --versionansible 2.7.2 config file = /etc/ansible/ansible.cfg configured module search path = [u'/root/.ansible/plugins/modules', u'/usr/share/ansible/plugins/modules'] ansible python module location = /usr/lib/python2.7/site-packages/ansible executable location = /bin/ansible python version = 2.7.5 (default, Jul 13 2018, 13:06:57) [GCC 4.8.5 20150623 (Red Hat 4.8.5-28)]
Ansible配置及测试
ansible的主机和组的默认配置在/etc/ansible/hosts,我们可以不用默认配置直接建立一个新的配置,使用的时候指定就可以。
建立一个放ansible配置的目录和文件
[root@wsn-ansbile1 ~]# mkdir -p /root/ansible_test[root@wsn-ansbile1 ~]# cd /root/ansible_test/[root@wsn-ansbile1 ansible_test]# touch host.wsn[root@wsn-ansbile1 ansible_test]# vim host.wsn内容如下: [webservers]192.168.12.15 192.168.12.16 [root@wsn-ansbile1 ansible_test]# ansible -i host.wsn 192.168.12.15 -m ping -k SSH password: 192.168.12.15 | SUCCESS => { "changed": false, "ping": "pong"} [root@wsn-ansible1 ansible_test]# ansible -i host.wsn webservers -m ping -kSSH password: 192.168.12.15 | SUCCESS => { "changed": false, "ping": "pong"}192.168.12.16 | SUCCESS => { "changed": false, "ping": "pong"}
由于主控机器和被控机器没有建立免密码登录所以要加上-k参数,提供root的密码,-i参数是指定主机和组的配置,webservers是组名。
配置Linux免密码登录
首先关闭selinux不然会出现问题命令如下:
[root@wsn-ansible1 ~]# setenforce 0上面的命令是临时关闭,建议永久关闭 [root@wsn-ansible1 ~]# vim /etc/selinux/configSELINUX=disabled 改成disabled
创建免密码密钥
[root@wsn-ansible1 ~]# ssh-keygenGenerating 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:SHA256:LQB7G8BSr4KNNbouZ0x0BY8oxXK3FtKk9tr5dsQ7Z7M root@wsn-ansible1 The key's randomart image is: +---[RSA 2048]----+ | ..=*. | |..=o=B. | |.o*+o+* | | O.o+o + . | |+.ooo ..S . | | ..+ . o. | |.o. o . . | |o + .. + + | |.+ ... +Eo | +----[SHA256]-----+ [root@wsn-ansible1 ~]# ssh-copy-id -i ~/.ssh/id_rsa.pub root@192.168.12.14 /bin/ssh-copy-id: INFO: Source of key(s) to be installed: "/root/.ssh/id_rsa.pub" The authenticity of host '192.168.12.14 (192.168.12.14)' can't be established. ECDSA key fingerprint is SHA256:GDKal+vbb4MrmyKyw3EtZBUAtlRnKI/FAxRE1Z+fa+E. ECDSA key fingerprint is MD5:6f:af:69:ef:ff:34:a6:89:0e:88:34:21:8a:0a:0f:38. Are you sure you want to continue connecting (yes/no)? yes /bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed /bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys root@192.168.12.14's password: Number of key(s) added: 1 Now try logging into the machine, with: "ssh 'root@192.168.12.14'" and check to make sure that only the key(s) you wanted were added. [root@wsn-ansible1 ~]# ssh 192.168.12.14 Last login: Tue Nov 20 10:43:14 2018 [root@wsn-ansible1 ~]# ssh-copy-id -i ~/.ssh/id_rsa.pub root@192.168.12.15 /bin/ssh-copy-id: INFO: Source of key(s) to be installed: "/root/.ssh/id_rsa.pub" /bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed /bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys root@192.168.12.15's password: Number of key(s) added: 1Now try logging into the machine, with: "ssh 'root@192.168.12.15'"and check to make sure that only the key(s) you wanted were added. [root@wsn-ansible1 ~]# ssh-copy-id -i ~/.ssh/id_rsa.pub root@192.168.12.16/bin/ssh-copy-id: INFO: Source of key(s) to be installed: "/root/.ssh/id_rsa.pub"/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed /bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys root@192.168.12.16's password: Number of key(s) added: 1 Now try logging into the machine, with: "ssh 'root@192.168.12.16'" and check to make sure that only the key(s) you wanted were added. [root@wsn-ansible1 ~]# ssh 192.168.12.15 Last failed login: Tue Nov 20 11:01:23 CST 2018 from 192.168.12.14 on ssh:notty There was 1 failed login attempt since the last successful login. Last login: Tue Nov 20 10:47:45 2018 from 192.168.12.14 [root@wsn-absible2 ~]# exit logout Connection to 192.168.12.15 closed. [root@wsn-ansible1 ~]# ssh 192.168.12.16 Last login: Tue Nov 20 10:47:45 2018 from 192.168.12.14 [root@wsn-absilbe3 ~]# exit logout Connection to 192.168.12.16 closed.
作者:为了梦想起航
链接:https://www.jianshu.com/p/ad5291b17486
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