vi /home/xiangdong/ansible/ansible.cfg
# uncomment this to disable SSH key host checking
host_key_checking = False

[root@m01 ansible]# tail hosts
172.16.1.9
[web21_c7]
10.0.0.17
10.0.0.64
10.0.0.62
[c7:vars]
ansible_ssh_user=root 
ansible_ssh_pass=123456
ansible_ssh_port=22

2015年5月4日 admin 发表评论 阅读评论

Ansible默认安装好后有一个配置文件/etc/ansible/ansible.cfg，该配置文件中定义了ansible的主机的默认配置部分，如默认是否需要输入密码、是否开启sudo认证、action_plugins插件的位置、hosts主机组的位置、是否开启log功能、默认端口、key文件位置等等。

具体如下：

[defaults]

# some basic default values...

hostfile = /etc/ansible/hosts \\指定默认hosts配置的位置

# library_path = /usr/share/my_modules/

remote_tmp = $HOME/.ansible/tmp

pattern = *

forks = 5

poll_interval = 15

sudo_user = root \\远程sudo用户

#ask_sudo_pass = True \\每次执行ansible命令是否询问ssh密码

#ask_pass = True \\每次执行ansible命令时是否询问sudo密码

transport = smart

remote_port = 22

module_lang = C

gathering = implicit

host_key_checking = False \\关闭第一次使用ansible连接客户端是输入命令提示

log_path = /var/log/ansible.log \\需要时可以自行添加。chown -R root:root ansible.log

system_warnings = False \\关闭运行ansible时系统的提示信息，一般为提示升级

# set plugin path directories here, separate with colons

action_plugins = /usr/share/ansible_plugins/action_plugins

callback_plugins = /usr/share/ansible_plugins/callback_plugins

connection_plugins = /usr/share/ansible_plugins/connection_plugins

lookup_plugins = /usr/share/ansible_plugins/lookup_plugins

vars_plugins = /usr/share/ansible_plugins/vars_plugins

filter_plugins = /usr/share/ansible_plugins/filter_plugins

fact_caching = memory

[accelerate]

accelerate_port = 5099

accelerate_timeout = 30

accelerate_connect_timeout = 5.0

# The daemon timeout is measured in minutes. This time is measured

# from the last activity to the accelerate daemon.

accelerate_daemon_timeout = 30

本篇就结合一个示例对其进行下了解。我在对之前未连接的主机进行连结时报错如下：

[ root@361way . com ~] # ansible test -a 'uptime'

10.212 . 52.14 | FAILED => Using a SSH password instead of a key is not possible because Host Key checking is enabled and sshpass does not support this . Please add this host 's fingerprint to your known_hosts file to manage this host.

10.212.52.16 | FAILED => Using a SSH password instead of a key is not possible because Host Key checking is enabled and sshpass does not support this. Please add this host' s fingerprint to your known_hosts file to manage this host .

从上面的输出提示上基本可以了解到由于在本机的~/.ssh/known_hosts文件中并有fingerprint key串，ssh第一次连接的时候一般会提示输入yes 进行确认为将key字符串加入到  ~/.ssh/known_hosts 文件中。

了解到问题原因为，我们了解到进行ssh连接时，可以使用-o参数将StrictHostKeyChecking设置为no，使用ssh连接时避免首次连接时让输入yes/no部分的提示。通过查看ansible.cfg配置文件，发现如下行：

[ssh_connection]

# ssh arguments to use

# Leaving off ControlPersist will result in poor performance, so use

# paramiko on older platforms rather than removing it

#ssh_args = -o ControlMaster=auto -o ControlPersist=60s

所以这里我们可以启用ssh_args 部分，使用下面的配置，避免上面出现的错误：

ssh_args = -o ControlMaster=auto -o ControlPersist=60s -o StrictHostKeyChecking＝no

在ansible.cfg配置文件中，也会找到如下部分：

# uncomment this to disable SSH key host checking

host_key_checking = False

默认host_key_checking部分是注释的，通过找开该行的注释，同样也可以实现跳过 ssh 首次连接提示验证部分。由于配置文件中直接有该选项，所以推荐用方法2 。

由于官方给的说明比较详细，同时ansible.cfg 文件本身默认也有注释提示部分，所以不做过多说明，这里再举个例子，默认ansible 执行的时候，并不会输出日志到文件，不过在ansible.cfg 配置文件中有如下行：

# logging is off by default unless this path is defined

# if so defined, consider logrotate

log_path = /var/log/ansible.log

同样，默认log_path这行是注释的，打开该行的注释，所有的命令执行后，都会将日志输出到/var/log/ansible.log 文件，便于了解在何时执行了何操作及其结果，如下：

[ root@361way . com ansible ] # cat /var/log/ansible.log

2015 - 05 - 04 01 : 57 : 19 , 758 p = 4667 u = root |

2015 - 05 - 04 01 : 57 : 19 , 759 p = 4667 u = root | / usr / bin / ansible test - a uptime

2015 - 05 - 04 01 : 57 : 19 , 759 p = 4667 u = root |

2015 - 05 - 04 01 : 57 : 20 , 563 p = 4667 u = root | 10.212 . 52.252 | success | rc = 0 >>

01 : 57am up 23 days 11 : 20 , 2 users , load average : 0.38 , 0.38 , 0.40

2015 - 05 - 04 01 : 57 : 20 , 831 p = 4667 u = root | 10.212 . 52.14 | success | rc = 0 >>

02 : 03am up 331 days 8 : 19 , 2 users , load average : 0.08 , 0.05 , 0.05

2015 - 05 - 04 01 : 57 : 20 , 909 p = 4667 u = root | 10.212 . 52.16 | success | rc = 0 >>

02 : 05am up 331 days 8 : 56 , 2 users , load average : 0.00 , 0.01 , 0.05

更多部分可以 参看官方文档 。

时来天地皆同力，运去英雄不自由