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 。
其他部分
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。
原文来自：http://www.361way.com/ansible-cfg/4401.html
本文地址：https://www.linuxprobe.com/ansible-ansible-cfg.html编辑：张雄，审核员：逄增宝
本文原创地址：https://www.linuxprobe.com/ansible-ansible-cfg.html编辑：问题终结者，审核员：暂无
