This article was originally published on June 15, 2021
WHAT’S NEW
This update is notifying you of the general availability release of High Availability Router for Postgres (HARP) 1.0.0 for production deployments with BDR. HARP is a cluster management tool for Bi-directional Replication (BDR) clusters, which routes all application traffic within a data center to only one lead master at a time. Together with the core capabilities of BDR this mechanism allows for fast failover and switchover without risk of data loss.
Features available with previous beta releases include:
- Proxy traffix with HAProxy
- Usage of native BDR (3.6.21 and later), or etcd as a consensus layer
- Packaged as RPM's
- Deployable as part of a Trusted Postgres Architecture with BDR
New features and improvements for this release:
|
Highlights |
Type |
|
--dry-run option added to harpctl leader set |
Enhancement |
|
Minimum configuration values will be enforced |
Enhancement |
|
lock_interval parameter can be specified as fractions of a second |
Enhancement |
|
Logging and output improvements |
Enhancement |
|
Replication lag query updated to handle parallel apply |
Enhancement |
|
When Data Center interconnectivity fails, HARP will fallback to separate Data Center local clusters and keep routing traffic in both Data Centers |
Enhancement |
|
harpctl returns an error code if leader set fails |
Bug |
|
Prevention of a corner-case failure when node peer progress not returned |
Bug |
|
Handle potentially empty node record |
Bug |
|
Catch unhandled exception when deciding the lead node candidate |
Bug |
TELL ME MORE
For more details, please review the HARP (High Availability Router for Postgres) documentation.
IS THIS UPDATE FOR ME?
This announcement is for EDB customers who are using, or are interested in, HARP and have a subscription purchased for:
- Standard Subscription
- Enterprise Subscription
- Enterprise+ Subscription
HOW TO GET THE UPDATE AND APPLY IT
HARP 1.0.0 is packaged and delivered on the EDB website and is available for customers through the repositories described here.
TROUBLESHOOTING
If you experience any problems around the installation, migration, upgrade or general use of your EDB software please contact our Technical Support teams.
We can be reached at https://support.enterprisedb.com, and we’re also available 24 x 7 via email or phone at the details below:
Email: support@enterprisedb.com
Phone: US: +1-732-331-1320 or 1-800-235-5891
UK: +44-2033719820
Brazil: +55-2139581371
India: +91-20-66449612