Build a Narrow NetworkPolicy
Design a NetworkPolicy that starts from default deny and adds only required workload flows.
before-after stepper sort-buckets Billing Pods should only receive gateway traffic and send to Postgres plus metrics, but current network behavior allows broad east-west access. Inventory required flows, apply default deny, then add narrow allow rules. The common trap is jumping straight to deny-all in production without knowing dependencies. That proves the policy is strong by breaking unknown traffic, not by modeling intended traffic. Step 1 Select the protected workload with stable labels such as app=billing, component=api. Policy quality depends on label quality. A broad selector can affect the wrong Pods. Step 2 Create a default-deny policy for the selected workload's…
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