ansible 新手上路

远程连接概述:在我们开始前要先理解Ansible是如何通过SSH与远程服务器连接是很重要的:你第一条命令:现在你已经按照了Ansible,是时候从一些基本知识开始了,编辑(或创建)/etc/ansible/hosts并在其中加入一个或多个远程系统,你的public SSH Key 必须在这些系统的``authorized_keys``中:[root@node01 ansible]# cat /etc/ansible/hosts 192.168.137.3[root@node01 ansible]# ansible all -m ping192.168.137.3 | SUCCESS => {    "changed": false,     "failed": false,     "ping": "pong"}[root@node01 ansible]# ！检测机器是否可登录,ping模块不需要传送参数！注：这里的ping模块并非调用了系统的ping命令，而是类似于登录到远程机器再echo出一个信息。 -m MODULE_NAME, --module-name=MODULE_NAME[root@node01 ansible]# ansible 192.168.137.3 -m ping192.168.137.3 | SUCCESS => {    "changed": false,     "failed": false,     "ping": "pong"}在192.168.137.3 会输出信息:Oct  4 20:15:19 node2 ansible-ping: Invoked with data=pongOptions:  -a MODULE_ARGS, --args=MODULE_ARGS                        module arguments[root@node01 ansible]# ansible 192.168.137.3 -a "df -h"192.168.137.3 | SUCCESS | rc=0 >>Filesystem      Size  Used Avail Use% Mounted on/dev/sda3        19G   13G  5.3G  71% /tmpfs           497M     0  497M   0% /dev/shm/dev/sda1       194M   29M  155M  16% /boot公钥认证:Ansible1.2.1及其之后的版本都会默认启用公钥认证:[root@node01 ansible]# ansible all -m ping192.168.137.1 | UNREACHABLE! => {    "changed": false,     "msg": "Failed to connect to the host via ssh: ",     "unreachable": true}192.168.137.3 | SUCCESS => {    "changed": false,     "failed": false,     "ping": "pong"}115.236.19.4 | UNREACHABLE! => {    "changed": false,     "msg": "Failed to connect to the host via ssh: ssh: connect to host 115.236.19.4 port 22: Connection timed out\r\n",     "unreachable": true}