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Change _Default sink destination to regional log buckets

Background

Currently when logging API is enabled in a project it creates two log buckets: _Required and _Default. These log buckets are created in a Global region, and customers with data locality restriction may not want to store their logs in a Global location.

Read more: https://cloud.google.com/logging/docs/routing/overview#buckets

This behaviour can be changed by setting an organization level setting that restricts the log bucket creation to a specefic region. However, these settings are applied only for any newly created projects and doesn't change the log bucket location for existing projects.

Read more: https://cloud.google.com/logging/docs/default-settings

In some cases, customers may not have set these organization level setting and would want to change the log bucket's location to a specific region.

Read more: https://cloud.google.com/logging/docs/regionalized-logs

NOTE: _Required log bucket region can NOT be changed once they are created. This utility only works for _Default

Solution

This utility helps in reconfiguring the _Default sink to send logs to a newly created regional Default bucket.

There are 2 parts to this utility:

  1. list_all_projects --> This function takes an Organization ID and scans through all the folders and sub folders to generate a list of projects within the organization
  2. create_bucket_update_sink --> This function takes a list of projects and reconfigures the _Default sink

If you already have a list of projects where you want to reconfigure the _Default sink, you can disable project listing by setting "list_projects = False" in the file user_inputs.py.

NOTE: You can't move the existing logs from Global log buckets to the newly created regional log buckets. You can create log views to include both old and new buckets.

Permissions and Roles Required

The principal running the utility needs the below roles attached to them at the organization level.

  1. roles/resourcemanager.organizationViewer
  2. roles/resourcemanager.folderViewer
  3. roles/logging.admin

Usage

  1. Clone this repository or copy all the files in this directory to the VM where you want to execute.
  2. Install the Google Cloud Python modules: 
    pip3 install -r requirements.txt
  3. Ensure that the principal running this script has the required roles are mentioned above.
  4. In the user_inputs.py file provide the below varaibles:
    • log_bucket_region --> Region where new log bucket needs to be created. Eg: us-central1
    • log_bucket_name --> Log bucket name for new log bucket, generally "Default".
    • organization_id --> Your GCP Organization ID
    • list_projects --> Boolean. If False: list_all_projects won't run and you'll need to provide the list of project in projectListFile
    • exclude_folders = {"123456", "123455678"} --> A set. If you don't want certain folders to be scanned for projects, you can skip.
    • exclude_projects = {"project_id1", "project_id2"} --> A set. If you don't want certain projects to be listed, you can skip.
    • projectListFile = "Path/To/Your/Project_List_File.txt" --> If you already have a project list, provide the projects list file location. See sample_projectid.txt for an example file.
  5. Run the utility 
    python3 main.py