Upgrade of Elasticsearch from Version 7.15 to 7.17

Problem:

The client requested assistance with upgrading their Elasticsearch installation from version 7.15 to 7.17. The client sought a detailed step-by-step guide and expressed the need for a meeting to clarify the upgrade process.

Process:

Upon receiving the request, the expert requested additional details about the client’s current Elasticsearch setup, including information on the cluster, indices, and any plugins in use. Once the necessary information was provided, a meeting was scheduled between the client and the expert.

Solution:

The expert provided the client with a comprehensive plan for upgrading Elasticsearch.

1. Pre-Migration Preparations

• Conducting a full snapshot backup.
• Verifying cluster settings and index templates.
• Ensuring correct backup of indexes and pipelines.

2. Upgrade Planning

• Communicating the necessary downtime due to the single node setup.

3. Migration Process

• Providing a migration script for installing Elasticsearch 7.17.

4. Post-Upgrade Steps

• Performing a cluster health check.
• Monitoring logs for 24-48 hours post-upgrade.
• Verifying shard allocation and functionality.

Conclusion:

The proposed solution is effective because it offers a structured and thorough approach to upgrading Elasticsearch. By preparing in advance, ensuring proper backups, and planning for potential downtime, the client can mitigate risks associated with the upgrade. The step-by-step guidance ensures that all critical aspects of the upgrade are addressed, resulting in a smoother transition to the newer version of Elasticsearch.