ClusterControl 1.4 – the MySQL Replication & MongoDB Edition

Jean-Jérôme Schmidt


Today we are pleased to announce the 1.4 release of ClusterControl – the all-inclusive database management system that lets you easily deploy, monitor, manage and scale highly available open source databases in any environment; on-premise or in the cloud.

This release contains key new features for MongoDB and MySQL Replication in particular, along with performance improvements and bug fixes.

Release Highlights


MySQL Replication

  • Enhanced multi-master deployment
  • Flexible topology management & error handling
  • Automated failover

MySQL Replication & Load Balancers

  • Deploy ProxySQL on MySQL Replication setups and monitor performance
  • HAProxy Read-Write split configuration support for MySQL Replication setups

Experimental support for Oracle MySQL Group Replication

  • Deploy Group Replication Clusters

And support for Percona XtraDB Cluster 5.7

Download ClusterControl

For MongoDB

MongoDB & sharded clusters

  • Convert a ReplicaSet to a sharded cluster
  • Add or remove shards
  • Add Mongos/Routers

More MongoDB features

  • Step down or freeze a node
  • New Severalnines database advisors for MongoDB

Download ClusterControl

View Release Details and Resources

New MySQL Replication Features

ClusterControl 1.4 brings a number of new features to better support replication users. You are now able to deploy a multi-master replication setup in active – standby mode. One master will actively take writes, while the other one is ready to take over writes should the active master fail. From the UI, you can also easily add slaves under each master and reconfigure the topology by promoting new masters and failing over slaves.

Topology reconfigurations and master failovers are not usually possible in case of replication problems, for instance errant transactions. ClusterControl will check for issues before any failover or switchover happens. The admin can define whitelists and blacklists of which slaves to promote to master (and vice versa). This makes it easier for admins to manage their replication setups and make topology changes when needed. 

Deploy ProxySQL on MySQL Replication Clusters and Monitor Performance

Load balancers are an essential component in database high availability. With this new release, we have extended ClusterControl with the addition of ProxySQL, created for DBAs by René Cannaò, himself a DBA trying to solve issues when working with complex replication topologies. Users can now deploy ProxySQL on MySQL Replication clusters with ClusterControl and monitor its performance.

By default, ClusterControl deploys ProxySQL in read/write split mode – your read-only traffic will be sent to slaves while your writes will be sent to a writable master. ProxySQL will also work together with the new automatic failover mechanism. Once failover happens, ProxySQL will detect the new writable master and route writes to it. It all happens automatically, without any need for the user to take action.

MongoDB & Sharded Clusters

MongoDB is the rising star of the Open Source databases, and extending our support for this database has brought sharded clusters in addition to replica sets. This meant we had to retrieve more metrics to our monitoring, adding advisors and provide consistent backups for sharding. With this latest release, you can now convert a ReplicaSet cluster to a sharded cluster, add or remove shards from a sharded cluster as well as add Mongos/routers to a sharded cluster.

New Severalnines Database Advisors for MongoDB

Advisors are mini programs that provide advice on specific database issues and we’ve added three new advisors for MongoDB in this ClusterControl release. The first one calculates the replication window, the second watches over the replication window, and the third checks for un-sharded databases/collections. In addition to this we also added a generic disk advisor. The advisor verifies if any optimizations can be done, like noatime and noop I/O scheduling, on the data disk that is being used for storage.

There are a number of other features and improvements that we have not mentioned here. You can find all details in the ChangeLog.

We encourage you to test this latest release and provide us with your feedback. If you’d like a demo, feel free to request one.

Thank you for your ongoing support, and happy clustering!

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