file_key_value_parameter_present_in_list

Ensure that one parameter exists in a list of parameters, on one single line, in the right hand side of a key->values line.

⚙️ Compatible targets: Linux

Parameters

Name	Documentation
path	File name to edit (absolute path on the target node). This parameter is required.
key	Full key name. This parameter is required.
key_value_separator	character used to separate key and value in a key-value line. This parameter can contain only whitespaces. This parameter is required.
parameter	String representing the sub-value to ensure is present in the list of parameters that form the value part of that line. This parameter is required.
parameter_separator	Character used to separate parameters in the list. This parameter can contain only whitespaces. This parameter is required.
leading_char_separator	leading character of the parameters. This parameter is optional.
closing_char_separator	closing character of the parameters. This parameter is optional.

Outcome conditions

You need to replace ${path} with its actual canonified value.

✅ Ok: file_key_value_parameter_present_in_list_${path}_ok
- ☑️ Already compliant: file_key_value_parameter_present_in_list_${path}_kept
- 🟨 Repaired: file_key_value_parameter_present_in_list_${path}_repaired
❌ Error: file_key_value_parameter_present_in_list_${path}_error

Example

method: file_key_value_parameter_present_in_list
params:
  leading_char_separator: OPTIONAL_VALUE
  closing_char_separator: OPTIONAL_VALUE
  parameter_separator: VALUE
  key_value_separator: VALUE
  parameter: VALUE
  path: VALUE
  key: VALUE

Edit the file, and ensure it contains the defined parameter in the list of values on the right hand side of a key->values line. If the parameter is not there, it will be added at the end, separated by parameter_separator. Optionally, you can define leading and closing character to enclose the parameters If the key does not exist in the file, it will be added in the file, along with the parameter

Example

If you have an initial file (/etc/default/grub) containing

GRUB_CMDLINE_XEN="dom0_mem=16G"

To add parameter dom0_max_vcpus=32 in the right hand side of the line, you'll need the following policy

file_ensure_key_value_parameter_in_list("/etc/default/grub", "GRUB_CMDLINE", "=", "dom0_max_vcpus=32", " ", "\"", "\"");

Rudder techniques