Amazon OpenSearch Service Cluster Insights Now Diagnose Red/Yellow Status with 17 New Checks!

Hi, this is Shii-chan! Today I found an update that OpenSearch users will love — diagnosing what's wrong with your cluster just got a lot easier.

AWS What's New aws.amazon.com

What was announced?

According to AWS's What's New, Amazon OpenSearch Service's Cluster Insights now includes 17 new insights. When a cluster enters a Red or Yellow status, these insights automatically identify the root cause and provide specific, actionable recommendations to fix it.

The root causes covered are pretty broad — from resource exhaustion scenarios like JVM out-of-memory conditions and sustained CPU saturation, to configuration issues like zone imbalance and misconfigured replica counts.

The story so far

Before this, when a cluster went Red or Yellow because of unassigned shards, figuring out why meant manually correlating multiple metrics across nodes and availability zones. That was a slow, hands-on process that often relied on experience and intuition as much as data.

What changes

Now OpenSearch Service automatically identifies the specific resource constraint or misconfiguration behind the issue, and suggests tailored fixes — things like scaling up your instance type, increasing disk capacity, or correcting shard allocation settings. For anyone responding to an incident, that means less time staring at dashboards trying to correlate metrics, and more time actually fixing the problem.

Dive Deep

Here's how the 17 new insights break down.

• 6 Critical-severity insights that detect conditions causing primary shards to become unassigned (Red status)
• 11 insights ranging from Medium to Critical severity that surface issues preventing replica shard allocation (Yellow status)

Each insight identifies the affected nodes and comes with specific remediation recommendations, so you're not left guessing where to start.

Availability details:

• Pricing: available at no additional cost
• Supported versions: OpenSearch 1.0 and later, Elasticsearch 6.8 and later
• Regions: 11 Regions globally

Wrap-up

• Cluster Insights gained 17 new insights for diagnosing Red/Yellow cluster status
• 6 insights target Red status causes, 11 target Yellow status causes, covering JVM OOM, CPU saturation, zone imbalance, and replica misconfiguration
• Each insight pinpoints affected nodes and gives you a concrete remediation recommendation
• It's free, and available across 11 Regions for domains running OpenSearch 1.0+ or Elasticsearch 6.8+

If you run OpenSearch clusters and dread the metric-correlating detective work during an incident, this update is made for you!