Starting an HADR configuration for Db2

To start a high availability disaster recovery (HADR) configuration on Db2, use the manage_hadr tool.

Before you begin

Create services to expose the HADR endpoints.
Set up the HADR configuration.
Preserve your existing backup images.
Important: When you start an HADR configuration, the backup images that are in the ${BACKUPDIR} path are deleted. To preserve the existing backup images, move the images to a subdirectory under ${BACKUPDIR}. For example, ${BACKUPDIR}/backup_001.

Procedure

Start HADR on the standby database pod:

Note: Use -start_as standby for both the principal and auxiliary standby databases.
```
oc exec -it db2oltp-1573144443-db2u-0 -- manage_hadr -start_as standby
```

Start HADR on the primary database pod:

oc exec -it db2oltp-1573141715-db2u-0 -- manage_hadr -start_as primary

What to do next

Connect clients to the HADR configuration.