Uni-directional index following
Elastic Cloud Hosted lets you manage and configure one or more deployments of the versioned Elastic Stack, hosted on Elastic Cloud. Availability This functionality is generally available and ready for production usage. Elastic Cloud on Kubernetes extends Kubernetes orchestration capabilities to allow you to deploy and manage components of the Elastic Stack. Availability This functionality is generally available and ready for production usage. This documentation corresponds to the latest patch available for each minor version. If you're not using the latest patch, check the release notes for changes. Elastic Cloud Enterprise is a self-managed orchestration platform for deploying and managing the Elastic Stack at scale. Availability This functionality is generally available and ready for production usage. This documentation corresponds to the latest patch available for each minor version. If you're not using the latest patch, check the release notes for changes. Self-managed deployments are Elastic Stack deployments managed without the assistance of an orchestrator. Availability This functionality is generally available and ready for production usage. This documentation corresponds to the latest patch available for each minor version. If you're not using the latest patch, check the release notes for changes.
ECH
Generally available
ECK
Generally available
ECE
Generally available
Self-managed
Generally available
In a uni-directional configuration, one cluster contains only leader indices, and the other cluster contains only follower indices that replicate the leader indices.
In this strategy, the cluster with follower indices should be upgraded first and the cluster with leader indices should be upgraded last. Upgrading the clusters in this order ensures that index following can continue during the upgrade without downtime.
You can also use this strategy to upgrade a replication chain. Start by upgrading clusters at the end of the chain and working your way back to the cluster that contains the leader indices.
For example, consider a configuration where Cluster A contains all leader indices. Cluster B follows indices in Cluster A, and Cluster C follows indices in Cluster B.
Cluster A
^--Cluster B
^--Cluster C
In this configuration, upgrade the clusters in the following order:
- Cluster C
- Cluster B
- Cluster A