[Solved] After enabling mTLS STRICT mode, some services fail to communicate. What should you check first? — Ans: Verify that all services have valid certificates | Kubernetes

Kubernetes - Service Mesh

After enabling mTLS STRICT mode, some services fail to communicate. What should you check first?

AVerify that all services have valid certificates

BCheck if services have enough CPU resources

CConfirm that services use the correct image version

DRestart the Kubernetes API server

Step-by-Step Solution

Solution:

Step 1: Understand mTLS requirements
STRICT mode requires valid certificates for authentication.
Step 2: Eliminate unrelated checks
CPU, image version, or API server restart do not directly affect mTLS communication.
Final Answer:
Verify that all services have valid certificates -> Option A
Quick Check:
Valid certificates needed for STRICT mTLS [OK]

Quick Trick: mTLS needs valid certificates on all services [OK]

Common Mistakes:

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After enabling mTLS STRICT mode, some services fail to communicate. What should you check first?