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Diagnose and Repair Elasticsearch Indices
When configured correctly, Elasticsearch clusters are highly available and fault tolerant. That doesn't necessarily mean they are impervious to failure. Human error and hardware failure are always a possibility. Troubleshooting data availability issues on a distributed system can be a challenge. In this hands-on lab, we will use the cluster allocation explain API to demystify the troubleshooting process of shard allocation issues in Elasticsearch.

Lab Info
Table of Contents
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Challenge
Troubleshoot any red-state indices.
Using the Secure Shell (SSH), log in to the data-1
node as
cloud_user` via the public IP address.Start the elasticsearch node with:
sudo systemctl start elasticsearch
Use the Kibana console tool to execute the following:
PUT logs-02/_settings { "number_of_replicas": 1 }
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Challenge
Troubleshoot any yellow-state indices.
Use the Kibana console tool to execute the following:
PUT logs-01/_settings { "number_of_replicas": 1 }
About the author
Real skill practice before real-world application
Hands-on Labs are real environments created by industry experts to help you learn. These environments help you gain knowledge and experience, practice without compromising your system, test without risk, destroy without fear, and let you learn from your mistakes. Hands-on Labs: practice your skills before delivering in the real world.
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