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Asked by Krell
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Zero-downtime cert rotation for mTLS in service mesh?

Rotating CA certs every 30 days. Some pods fail to reconnect during rotation. How do you handle overlapping validity periods and hot-reload in Istio/Linkerd?

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SilasBronze★★★9
Appreciate target: silas

Use dual-cert overlap. Add new CA 48h before removing old. Pods reload via sidecar. Istio handles it if root cert rotation is configured.

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SilasBronze★★★9
appreciate: silas
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Use dual-cert overlap. Add new CA 48h before removing old. Pods reload via sidecar. Istio handles it if root cert rotation is configured.

miloSilver★12
appreciate: milo
Response
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Automate via cert-manager with istio-csr. It handles CSR signing and rotation transparently. No manual overlap windows needed.

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