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celery15 will read from the old broker to drain all messages and write messages to the new broker
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AmitPhulera
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Feb 27, 2026
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https://dimagi.atlassian.net/browse/SAAS-19088
Follows what was done in #6791, though that PR had a few more bumps along the way which should ideally now not impact this one.
This PR includes the terraform changes necessary to create a new elasticache cluster running redis, and a new r53 record to enable easy routing to the cluster.
It then handles updating the variables used by webworkers and celery processes to interact with the message broker, and then sets
celery_broker_migrationto true oncelery15indicating that celery15 should read messages from the OLD_BROKER_URL to ensure all messages are drained.To roll this out, I'll first run
terraform applyon india to create the cluster. Once I confirm the cluster has been created successfully, I will follow the steps outlined in https://dimagi.atlassian.net/wiki/spaces/cc/pages/3522330836/Migrating+Celery+Brokers to perform the migration.Environments Affected
India