Tag - galera

CVE-2020-15180 – Affects Percona XtraDB Cluster

CVE-2020-15180

Galera replication technology, a key component of Percona XtraDB Cluster, suffered from a remote code execution vulnerability. Percona has been working with the vendor since early September on this issue and has made releases available to address the problem.
Applicability
A malicious party with access to the WSREP service port (4567/TCP) as well as prerequisite knowledge […]

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Various Ways to Perform Schema Upgrades with Percona XtraDB Cluster

Perform Schema Upgrades with Percona XtraDB Cluster

Schema changes are the big challenges in Galera replication. So, it is recommended to understand the schema changes operation for everyone who uses the Percona XtraDB Cluster (PXB)/Galera clusters. In this blog, I am going to explain the operation and impact of the various schema changes methods used in the PXB/Galera cluster.

Schema changes with […]

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Replication Between Two Percona XtraDB Clusters, GTIDs and Schema Changes

Replication Between Two Percona XtraDB Clusters

I got this question on the “How to Avoid Pitfalls in Schema Upgrade with Percona XtraDB Cluster (PXC)” webinar and wanted to answer it in a separate post.
Will RSU have an effect on GTID consistency if replication PXC cluster to another cluster?
Answer for this: yes and no.
Galera assigns its own GTID for the operations, […]

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Help Drive the Future of Percona XtraDB Cluster

Percona XtraDB Cluster

Percona is happy to announce the experimental release of Percona XtraDB Cluster 8.0. This is a major step for tuning Percona XtraDB Cluster to be more cloud- and user-friendly. This is the second experimental release that combines the updated and feature-rich Galera 4, with substantial improvements made by our development team.
Improvements and New Features […]

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Percona XtraDB Cluster 8.0 New Feature: wsrep_sst_auth Removal

Experimental Binary XtraDB 8.0

The problem
In PXC 5.6 and 5.7, when using xtrabackup-v2 as the SST method, the DBA must create a user with the appropriate privileges for use by Percona XtraBackup (PXB). The username and password of this backup user are specified in the wsrep_sst_auth variable.
This is a problem because this username and password was being stored […]

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