lineinfile
用来确定文件中的特定行存在，或者进行修改。用来修改单独一行时很有用，可以使用python正则表达式，例如对配置文件进行修改。如果想修改多行可以考虑replace，或者考虑blockinfile 如果想添加/更新一段内容。
自己用的不多，记下来避免忘了
主要参数：
- path: 文件位置 (Aliases: dest, destfile, name)
- line：想要插入或替换的行
- regexp： 正则表达式。使用该表达式去搜索行，只有最后一行会被修改
ansible-doc lineinfile：
> LINEINFILE (/usr/lib/python2.7/site-packages/ansible/modules/files/lineinfile.py)
This module ensures a particular line is in a file, or replace an existing line using a back-referenced regular expression. This
is primarily useful when you want to change a single line in a file only. See the [replace] module if you want to change
multiple, similar lines or check [blockinfile] if you want to insert/update/remove a block of lines in a file. For other cases,
see the [copy] or [template] modules.
OPTIONS (= is mandatory):
- attributes
Attributes the file or directory should have. To get supported flags look at the man page for `chattr' on the target system. This
string should contain the attributes in the same order as the one displayed by `lsattr'.
(Aliases: attr)[Default: None]
version_added: 2.3
- backrefs
Used with `state=present'. If set, line can contain backreferences (both positional and named) that will get populated if the
`regexp' matches. This flag changes the operation of the module slightly; `insertbefore' and `insertafter' will be ignored, and
if the `regexp' doesn't match anywhere in the file, the file will be left unchanged. If the `regexp' does match, the last
matching line will be replaced by the expanded line parameter.
[Default: no]
type: bool
version_added: 1.1
- backup
Create a backup file including the timestamp information so you can get the original file back if you somehow clobbered it
incorrectly.
[Default: no]
type: bool
- create
Used with `state=present'. If specified, the file will be created if it does not already exist. By default it will fail if the
file is missing.
[Default: no]
type: bool
- firstmatch
Used with `insertafter' or `insertbefore'. If set, `insertafter' and `inserbefore' find a first line has regular expression
matches.
[Default: no]
type: bool
version_added: 2.5
- group
Name of the group that should own the file/directory, as would be fed to `chown'.
[Default: None]
- insertafter
Used with `state=present'. If specified, the line will be inserted after the last match of specified regular expression. If the
first match is required, use(firstmatch=yes). A special value is available; `EOF' for inserting the line at the end of the file.
If specified regular expression has no matches, EOF will be used instead. May not be used with `backrefs'.
(Choices: EOF, *regex*)[Default: EOF]
- insertbefore
Used with `state=present'. If specified, the line will be inserted before the last match of specified regular expression. If the
first match is required, use(firstmatch=yes). A value is available; `BOF' for inserting the line at the beginning of the file. If
specified regular expression has no matches, the line will be inserted at the end of the file. May not be used with `backrefs'.
(Choices: BOF, *regex*)[Default: (null)]
version_added: 1.1
- line
Required for `state=present'. The line to insert/replace into the file. If `backrefs' is set, may contain backreferences that
will get expanded with the `regexp' capture groups if the regexp matches.
[Default: (null)]
- mode
Mode the file or directory should be. For those used to `/usr/bin/chmod' remember that modes are actually octal numbers (like
`0644' or `01777'). Leaving off the leading zero will likely have unexpected results. As of version 1.8, the mode may be
specified as a symbolic mode (for example, `u+rwx' or `u=rw,g=r,o=r').
[Default: None]
- others
All arguments accepted by the [file] module also work here.
[Default: (null)]
- owner
Name of the user that should own the file/directory, as would be fed to `chown'.
[Default: None]
= path
The file to modify.
Before 2.3 this option was only usable as `dest', `destfile' and `name'.
(Aliases: dest, destfile, name)
- regexp
The regular expression to look for in every line of the file. For `state=present', the pattern to replace if found. Only the last
line found will be replaced. For `state=absent', the pattern of the line(s) to remove. Uses Python regular expressions. See
http://docs.python.org/2/library/re.html.
[Default: (null)]
version_added: 1.7
- selevel
Level part of the SELinux file context. This is the MLS/MCS attribute, sometimes known as the `range'. `_default' feature works
as for `seuser'.
[Default: s0]
- serole
Role part of SELinux file context, `_default' feature works as for `seuser'.
[Default: None]
- setype
Type part of SELinux file context, `_default' feature works as for `seuser'.
[Default: None]
- seuser
User part of SELinux file context. Will default to system policy, if applicable. If set to `_default', it will use the `user'
portion of the policy if available.
[Default: None]
- state
Whether the line should be there or not.
(Choices: absent, present)[Default: present]
- unsafe_writes
Normally this module uses atomic operations to prevent data corruption or inconsistent reads from the target files, sometimes
systems are configured or just broken in ways that prevent this. One example are docker mounted files, they cannot be updated
atomically and can only be done in an unsafe manner.
This boolean option allows ansible to fall back to unsafe methods of updating files for those cases in which you do not have any
other choice. Be aware that this is subject to race conditions and can lead to data corruption.
[Default: False]
type: bool
version_added: 2.2
- validate
The validation command to run before copying into place. The path to the file to validate is passed in via '%s' which must be
present as in the example below. The command is passed securely so shell features like expansion and pipes won't work.
[Default: None]
NOTES:
* As of Ansible 2.3, the `dest' option has been changed to `path' as default, but `dest' still works as well.
AUTHOR: Daniel Hokka Zakrissoni (@dhozac), Ahti Kitsik (@ahtik)
METADATA:
status:
- preview
supported_by: core
EXAMPLES:
# Before 2.3, option 'dest', 'destfile' or 'name' was used instead of 'path'
- lineinfile:
path: /etc/selinux/config
regexp: '^SELINUX='
line: 'SELINUX=enforcing'
- lineinfile:
path: /etc/sudoers
state: absent
regexp: '^%wheel'
- lineinfile:
path: /etc/hosts
regexp: '^127\.0\.0\.1'
line: '127.0.0.1 localhost'
owner: root
group: root
mode: 0644
- lineinfile:
path: /etc/httpd/conf/httpd.conf
regexp: '^Listen '
insertafter: '^#Listen '
line: 'Listen 8080'
- lineinfile:
path: /etc/services
regexp: '^# port for http'
insertbefore: '^www.*80/tcp'
line: '# port for http by default'
# Add a line to a file if it does not exist, without passing regexp
- lineinfile:
path: /tmp/testfile
line: '192.168.1.99 foo.lab.net foo'
# Fully quoted because of the ': ' on the line. See the Gotchas in the YAML docs.
- lineinfile:
path: /etc/sudoers
state: present
regexp: '^%wheel\s'
line: '%wheel ALL=(ALL) NOPASSWD: ALL'
# Yaml requires escaping backslashes in double quotes but not in single quotes
- lineinfile:
path: /opt/jboss-as/bin/standalone.conf
regexp: '^(.*)Xms(\\d+)m(.*)$'
line: '\1Xms${xms}m\3'
backrefs: yes
# Validate the sudoers file before saving
- lineinfile:
path: /etc/sudoers
state: present
regexp: '^%ADMIN ALL='
line: '%ADMIN ALL=(ALL) NOPASSWD: ALL'
validate: '/usr/sbin/visudo -cf %s'