analyze-performance

Name

etcd:analyze-performance

Synopsis

/etcd:analyze-performance [--duration <minutes>]

Description

The analyze-performance command analyzes etcd performance metrics to identify latency issues, slow operations, and potential bottlenecks. It examines disk performance, commit latency, network latency, and provides recommendations for optimization.

Etcd performance is critical for cluster responsiveness. Slow etcd operations can cause:

• API server timeouts
• Slow pod creation and updates
• Controller delays
• Overall cluster sluggishness

This command is useful for:

• Diagnosing slow cluster operations
• Identifying disk I/O bottlenecks
• Detecting network latency issues
• Capacity planning
• Performance tuning

Prerequisites

Before using this command, ensure you have:

1. OpenShift CLI (oc)

   • Install from: https://mirror.openshift.com/pub/openshift-v4/clients/ocp/
   • Verify with: oc version

2. Active cluster connection

   • Must be connected to an OpenShift cluster
   • Verify with: oc whoami

3. Cluster admin permissions

   • Required to access etcd pods and metrics
   • Verify with: oc auth can-i get pods -n openshift-etcd

4. Running etcd pods

   • At least one etcd pod must be running
   • Check with: oc get pods -n openshift-etcd -l app=etcd

Arguments

• --duration (optional): Duration in minutes to analyze logs (default: 5)
  • Analyzes recent logs for the specified duration
  • Longer durations provide more comprehensive analysis
  • Example: --duration 15 for 15-minute window

Implementation

The command performs the following analysis:

1. Verify Prerequisites

if ! command -v oc &> /dev/null; then
    echo "Error: oc CLI not found"
    exit 1
fi

if ! oc whoami &> /dev/null; then
    echo "Error: Not connected to cluster"
    exit 1
fi

# Parse duration argument (default: 5 minutes)
DURATION=5
if [[ "$1" == "--duration" ]] && [[ -n "$2" ]]; then
    DURATION=$2
fi

echo "Analyzing etcd performance (last $DURATION minutes)..."