KA-R004: Single replica Deployment

Warning Reliability

Why This Matters

The Deployment specifies only 1 replica (or omits the replicas field, which defaults to 1). A single-replica Deployment has no redundancy and will experience downtime during rolling updates or node failures.

How to Fix

Set replicas to 2 or more for production workloads

Before (incorrect)

spec:
  replicas: 1

After (correct)

spec:
  replicas: 2

Rule Details

Rule Code: KA-R004
Severity: Warning
Category: Reliability

Related Rules

KA-R011 Error

Selector/template label mismatch

KA-R001 Warning

Missing liveness probe

KA-R002 Warning

Missing readiness probe

KA-R003 Warning

Identical liveness and readiness probes

KA-R006 Warning

No rolling update strategy