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

如果在对之前未连接的主机进行连结时报错如下:

ansible test -a 'uptime'
   192.168.1.1| FAILED =>Using a SSH password instead of a key is not possible because HostKey checking is enabled and sshpass does not support this.Please add this host's fingerprint to your known_hosts file to manage this host.
   192.168.1.2 | 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.

是由于在本机的~/.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。

方法1:

在进行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

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

方法2:

在ansible.cfg配置文件中,也会找到如下配置:

# 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。但在实际测试中,似乎并没有效果,建议使用方法1.

其他部分

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:

log_path = /var/log/ansible.log

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。