Documentation

blockinfile - Insert/update/remove a text block surrounded by marker lines

New in version 2.0.

Synopsis

  • This module will insert/update/remove a block of multi-line text surrounded by customizable marker lines.

Parameters

Parameter Choices/Defaults Comments
attributes
(added in 2.3)
Default:
None
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
backup
    Choices:
  • no ←
  • yes
Create a backup file including the timestamp information so you can get the original file back if you somehow clobbered it incorrectly.
block Default:
The text to insert inside the marker lines. If it's missing or an empty string, the block will be removed as if state were specified to absent.

aliases: content
create
    Choices:
  • no ←
  • yes
Create a new file if it doesn't exist.
group Default:
None
Name of the group that should own the file/directory, as would be fed to chown.
insertafter
    Choices:
  • EOF ←
  • *regex*
If specified, the block will be inserted after the last match of specified regular expression. A special value is available; EOF for inserting the block at the end of the file. If specified regular expression has no matches, EOF will be used instead.
insertbefore
    Choices:
  • BOF
  • *regex*
If specified, the block will be inserted before the last match of specified regular expression. A special value is available; BOF for inserting the block at the beginning of the file. If specified regular expression has no matches, the block will be inserted at the end of the file.
marker Default:
# {mark} ANSIBLE MANAGED BLOCK
The marker line template. "{mark}" will be replaced with the values in marker_begin (default="BEGIN") and marker_end (default="END").
marker_begin
(added in 2.5)
Default:
BEGIN
This will be inserted at {mark} in the opening ansible block marker.
marker_end
(added in 2.5)
Default:
END
This will be inserted at {mark} in the closing ansible block marker.
mode Default:
None
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).
owner Default:
None
Name of the user that should own the file/directory, as would be fed to chown.
path
required
The file to modify.
Before 2.3 this option was only usable as dest, destfile and name.

aliases: dest, destfile, name
selevel Default:
s0
Level part of the SELinux file context. This is the MLS/MCS attribute, sometimes known as the range. _default feature works as for seuser.
serole Default:
None
Role part of SELinux file context, _default feature works as for seuser.
setype Default:
None
Type part of SELinux file context, _default feature works as for seuser.
seuser Default:
None
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.
state
    Choices:
  • absent
  • present ←
Whether the block should be there or not.
unsafe_writes
(added in 2.2)
    Choices:
  • no ←
  • yes
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.
validate Default:
None
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.

Notes

Note

  • This module supports check mode.
  • When using ‘with_*’ loops be aware that if you do not set a unique mark the block will be overwritten on each iteration.
  • As of Ansible 2.3, the dest option has been changed to path as default, but dest still works as well.
  • Option follow has been removed in version 2.5, because this module modifies the contents of the file so follow=no doesn’t make sense.

Examples

# Before 2.3, option 'dest' or 'name' was used instead of 'path'
- name: insert/update "Match User" configuration block in /etc/ssh/sshd_config
  blockinfile:
    path: /etc/ssh/sshd_config
    block: |
      Match User ansible-agent
      PasswordAuthentication no

- name: insert/update eth0 configuration stanza in /etc/network/interfaces
        (it might be better to copy files into /etc/network/interfaces.d/)
  blockinfile:
    path: /etc/network/interfaces
    block: |
      iface eth0 inet static
          address 192.0.2.23
          netmask 255.255.255.0

- name: insert/update configuration using a local file and validate it
  blockinfile:
    block: "{{ lookup('file', './local/ssh_config') }}"
    dest: "/etc/ssh/ssh_config"
    backup: yes
    validate: "/usr/sbin/sshd -T -f %s"

- name: insert/update HTML surrounded by custom markers after <body> line
  blockinfile:
    path: /var/www/html/index.html
    marker: "<!-- {mark} ANSIBLE MANAGED BLOCK -->"
    insertafter: "<body>"
    content: |
      <h1>Welcome to {{ ansible_hostname }}</h1>
      <p>Last updated on {{ ansible_date_time.iso8601 }}</p>

- name: remove HTML as well as surrounding markers
  blockinfile:
    path: /var/www/html/index.html
    marker: "<!-- {mark} ANSIBLE MANAGED BLOCK -->"
    content: ""

- name: Add mappings to /etc/hosts
  blockinfile:
    path: /etc/hosts
    block: |
      {{ item.ip }} {{ item.name }}
    marker: "# {mark} ANSIBLE MANAGED BLOCK {{ item.name }}"
  with_items:
    - { name: host1, ip: 10.10.1.10 }
    - { name: host2, ip: 10.10.1.11 }
    - { name: host3, ip: 10.10.1.12 }

Status

This module is flagged as preview which means that it is not guaranteed to have a backwards compatible interface.

Support

For more information about Red Hat’s support of this module, please refer to this Knowledge Base article

Author

  • YAEGASHI Takeshi (@yaegashi)

Hint

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