cluster-logging-curator-delete-index.adoc

Configuring Curator index deletion

You can configure Curator to delete Elasticsearch data based on retention settings. You can configure per-project and global settings. Global settings apply to any project not specified. Per-project settings override global settings.

Prerequisite

• Cluster logging must be installed.

Procedure

To delete indices:

1. Edit the {product-title} custom Curator configuration file:

   $ oc edit configmap/curator

2. Set the following parameters as needed:

   config.yaml: |
     project_name:
       action
         unit:value

   The available parameters are:

   Table 1. Project options

   Variable Name	Description
   project_name	The actual name of a project, such as myapp-devel. For {product-title} operations logs, use the name .operations as the project name.
   action	The action to take, currently only delete is allowed.
   unit	The period to use for deletion, days, weeks, or months.
   value	The number of units.

   Table 2. Filter options

   Variable Name	Description
   .defaults	Use .defaults as the project_name to set the defaults for projects that are not specified.
   .regex	The list of regular expressions that match project names.
   pattern	The valid and properly escaped regular expression pattern enclosed by single quotation marks.

For example, to configure Curator to:

• Delete indices in the myapp-dev project older than 1 day

• Delete indices in the myapp-qe project older than 1 week

• Delete operations logs older than 8 weeks

• Delete all other projects indices after they are 31 days old

• Delete indices older than 1 day that are matched by the ^project\..+\-dev.*$ regex

• Delete indices older than 2 days that are matched by the ^project\..+\-test.*$ regex

Use:

  config.yaml: |
    .defaults:
      delete:
        days: 31

    .operations:
      delete:
        weeks: 8

    myapp-dev:
      delete:
        days: 1

    myapp-qe:
      delete:
        weeks: 1

    .regex:
      - pattern: '^project\..+\-dev\..*$'
        delete:
          days: 1
      - pattern: '^project\..+\-test\..*$'
        delete:
          days: 2

Important

When you use months as the $UNIT for an operation, Curator starts counting at the first day of the current month, not the current day of the current month. For example, if today is April 15, and you want to delete indices that are 2 months older than today (delete: months: 2), Curator does not delete indices that are dated older than February 15; it deletes indices older than February 1. That is, it goes back to the first day of the current month, then goes back two whole months from that date. If you want to be exact with Curator, it is best to use days (for example, delete: days: 30).