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You deployed a service mesh but notice that traffic is not routed through the sidecar proxies. What is a likely cause?

medium📝 Troubleshoot Q6 of 15
Kubernetes - Service Mesh
You deployed a service mesh but notice that traffic is not routed through the sidecar proxies. What is a likely cause?
AThe namespace was not labeled for sidecar injection
BThe application code lacks the communication library
CThe Kubernetes cluster is missing the container runtime
DThe service mesh requires manual pod restarts to work
Step-by-Step Solution
Solution:
  1. Step 1: Check sidecar injection setup

    If the namespace is not labeled, sidecar proxies are not injected, so traffic bypasses them.
  2. Step 2: Eliminate other causes

    Application code and container runtime issues do not prevent sidecar injection; manual restarts are not required if injection is automatic.
  3. Final Answer:

    The namespace was not labeled for sidecar injection -> Option A
  4. Quick Check:

    Missing namespace label blocks sidecar injection [OK]
Quick Trick: Label namespace to enable sidecar injection [OK]
Common Mistakes:
  • Blaming app code for missing sidecar traffic
  • Assuming container runtime causes injection failure
  • Thinking manual pod restart is always needed

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