ansible 配置文件详解

# config file for ansible -- http://ansible.com/    # ==============================================        # nearly all parameters can be overridden in ansible-playbook     # or with command line flags. ansible will read ANSIBLE_CONFIG,    # ansible.cfg in the current working directory, .ansible.cfg in    # the home directory or /etc/ansible/ansible.cfg, whichever it    # finds first        [defaults]   --->通用默认配置        # some basic default values...        inventory      = /etc/ansible/hosts     这个是默认库文件位置,脚本,或者存放可通信主机的目录    #library        = /usr/share/my_modules/   Ansible默认搜寻模块的位置    remote_tmp     = $HOME/.ansible/tmp   Ansible 通过远程传输模块到远程主机,然后远程执行,执行后在清理现场.在有些场景下,你也许想使用默认路径希望像更换补丁一样使用    pattern        = *    如果没有提供“hosts”节点,这是playbook要通信的默认主机组.默认值是对所有主机通信    forks          = 5    在与主机通信时的默认并行进程数 ，默认是5d    poll_interval  = 15    当具体的poll interval 没有定义时,多少时间回查一下这些任务的状态, 默认值是5秒    sudo_user      = root   sudo使用的默认用户 ，默认是root    #ask_sudo_pass = True   用来控制Ansible playbook 在执行sudo之前是否询问sudo密码.默认为no    #ask_pass      = True    控制Ansible playbook 是否会自动默认弹出密码    transport      = smart   通信机制.默认 值为’smart’。如果本地系统支持 ControlPersist技术的话,将会使用(基于OpenSSH)‘ssh’,如果不支持讲使用‘paramiko’.其他传输选项包括‘local’, ‘chroot’,’jail’等等    #remote_port    = 22    远程SSH端口。 默认是22    module_lang    = C   模块和系统之间通信的计算机语言，默认是C语言        # plays will gather facts by default, which contain information about    # the remote system.    #    # smart - gather by default, but don't regather if already gathered    # implicit - gather by default, turn off with gather_facts: False    # explicit - do not gather by default, must say gather_facts: True    gathering = implicit   控制默认facts收集（远程系统变量）. 默认值为’implicit’, 每一次play,facts都会被收集        # additional paths to search for roles in, colon separated    #roles_path    = /etc/ansible/roles   roles 路径指的是’roles/’下的额外目录,用于playbook搜索Ansible roles        # uncomment this to disable SSH key host checking    #host_key_checking = False    检查主机密钥        # change this for alternative sudo implementations    sudo_exe = sudo     如果在其他远程主机上使用另一种方式执sudu操作.可以使用该参数进行更换        # what flags to pass to sudo   传递sudo之外的参数    #sudo_flags = -H        # SSH timeout    SSH超时时间    timeout = 10        # default user to use for playbooks if user is not specified    # (/usr/bin/ansible will use current user as default)    #remote_user = root   使用/usr/bin/ansible-playbook链接的默认用户名，如果不指定，会使用当前登录的用户名        # logging is off by default unless this path is defined    # if so defined, consider logrotate    #log_path = /var/log/ansible.log     日志文件存放路径        # default module name for /usr/bin/ansible    #module_name = command     ansible命令执行默认的模块        # use this shell for commands executed under sudo    # you may need to change this to bin/bash in rare instances    # if sudo is constrained    #executable = /bin/sh     在sudo环境下产生一个shell交互接口. 用户只在/bin/bash的或者sudo限制的一些场景中需要修改        # if inventory variables overlap, does the higher precedence one win    # or are hash values merged together?  The default is 'replace' but    # this can also be set to 'merge'.    #hash_behaviour = replace    特定的优先级覆盖变量        # list any Jinja2 extensions to enable here:    #jinja2_extensions = jinja2.ext.do,jinja2.ext.i18n      允许开启Jinja2拓展模块        # if set, always use this private key file for authentication, same as     # if passing --private-key to ansible or ansible-playbook    #private_key_file = /path/to/file         私钥文件存储位置        # format of string {{ ansible_managed }} available within Jinja2     # templates indicates to users editing templates files will be replaced.    # replacing {file}, {host} and {uid} and strftime codes with proper values.    ansible_managed = Ansible managed: {file} modified on %Y-%m-%d %H:%M:%S by {uid} on {host}   这个设置可以告知用户,Ansible修改了一个文件,并且手动写入的内容可能已经被覆盖.        # by default, ansible-playbook will display "Skipping [host]" if it determines a task    # should not be run on a host.  Set this to "False" if you don't want to see these "Skipping"     # messages. NOTE: the task header will still be shown regardless of whether or not the     # task is skipped.    #display_skipped_hosts = True     显示任何跳过任务的状态 ，默认是显示        # by default (as of 1.3), Ansible will raise errors when attempting to dereference     # Jinja2 variables that are not set in templates or action lines. Uncomment this line    # to revert the behavior to pre-1.3.    #error_on_undefined_vars = False      如果所引用的变量名称错误的话, 将会导致ansible在执行步骤上失败        # by default (as of 1.6), Ansible may display warnings based on the configuration of the    # system running ansible itself. This may include warnings about 3rd party packages or    # other conditions that should be resolved if possible.    # to disable these warnings, set the following value to False:    #system_warnings = True    允许禁用系统运行ansible相关的潜在问题警告        # by default (as of 1.4), Ansible may display deprecation warnings for language    # features that should no longer be used and will be removed in future versions.    # to disable these warnings, set the following value to False:    #deprecation_warnings = True     允许在ansible-playbook输出结果中禁用“不建议使用”警告        # (as of 1.8), Ansible can optionally warn when usage of the shell and    # command module appear to be simplified by using a default Ansible module    # instead.  These warnings can be silenced by adjusting the following    # setting or adding warn=yes or warn=no to the end of the command line     # parameter string.  This will for example suggest using the git module    # instead of shelling out to the git command.    # command_warnings = False    当shell和命令行模块被默认模块简化的时,Ansible 将默认发出警告            # 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        # by default callbacks are not loaded for /bin/ansible, enable this if you    # want, for example, a notification or logging callback to also apply to     # /bin/ansible runs    #bin_ansible_callbacks = False    用来控制callback插件是否在运行 /usr/bin/ansible 的时候被加载. 这个模块将用于命令行的日志系统,发出通知等特性            # don't like cows?  that's unfortunate.    # set to 1 if you don't want cowsay support or export ANSIBLE_NOCOWS=1     #nocows = 1    默认ansible可以调用一些cowsay的特性   开启/禁用：0/1        # don't like colors either?    # set to 1 if you don't want colors, or export ANSIBLE_NOCOLOR=1    #nocolor = 1  输出带上颜色区别， 开启/关闭：0/1        # the CA certificate path used for validating SSL certs. This path     # should exist on the controlling node, not the target nodes    # common locations:    # RHEL/CentOS: /etc/pki/tls/certs/ca-bundle.crt    # Fedora     : /etc/pki/ca-trust/extracted/pem/tls-ca-bundle.pem    # Ubuntu     : /usr/share/ca-certificates/cacert.org/cacert.org.crt    #ca_file_path =            # the http user-agent string to use when fetching urls. Some web server    # operators block the default urllib user agent as it is frequently used    # by malicious attacks/scripts, so we set it to something unique to     # avoid issues.    #http_user_agent = ansible-agent        # if set to a persistent type (not 'memory', for example 'redis') fact values    # from previous runs in Ansible will be stored.  This may be useful when    # wanting to use, for example, IP information from one group of servers    # without having to talk to them in the same playbook run to get their    # current IP information.    fact_caching = memory            # retry files    #retry_files_enabled = False    #retry_files_save_path = ~/.ansible-retry        [privilege_escalation]    #become=True    #become_method=sudo    #become_user=root    #become_ask_pass=False        [paramiko_connection]        # uncomment this line to cause the paramiko connection plugin to not record new host    # keys encountered.  Increases performance on new host additions.  Setting works independently of the    # host key checking setting above.    #record_host_keys=False        # by default, Ansible requests a pseudo-terminal for commands executed under sudo. Uncomment this    # line to disable this behaviour.    #pty=False        [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        # The path to use for the ControlPath sockets. This defaults to    # "%(directory)s/ansible-ssh-%%h-%%p-%%r", however on some systems with    # very long hostnames or very long path names (caused by long user names or     # deeply nested home directories) this can exceed the character limit on    # file socket names (108 characters for most platforms). In that case, you     # may wish to shorten the string below.    #     # Example:     # control_path = %(directory)s/%%h-%%r    #control_path = %(directory)s/ansible-ssh-%%h-%%p-%%r        # Enabling pipelining reduces the number of SSH operations required to     # execute a module on the remote server. This can result in a significant     # performance improvement when enabled, however when using "sudo:" you must     # first disable 'requiretty' in /etc/sudoers    #    # By default, this option is disabled to preserve compatibility with    # sudoers configurations that have requiretty (the default on many distros).    #     #pipelining = False        # if True, make ansible use scp if the connection type is ssh     # (default is sftp)    #scp_if_ssh = True        [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         # If set to yes, accelerate_multi_key will allow multiple    # private keys to be uploaded to it, though each user must    # have access to the system via SSH to add a new key. The default    # is "no".    #accelerate_multi_key = yes        [selinux]    # file systems that require special treatment when dealing with security context    # the default behaviour that copies the existing context or uses the user default    # needs to be changed to use the file system dependant context.    #special_context_filesystems=nfs,vboxsf,fuse