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Interactive Explainer

Istio Certificate Management & SPIFFE

Certificate lifecycle in Istio: istiod CA, SPIFFE identity, cert rotation, and integration with external CAs.

🎯Key Takeaways
istiod = default CA (good for dev)
Production: integrate with HashiCorp Vault or cloud CA
Trust domain: shared across clusters for multi-cluster mTLS

Istio Certificate Management & SPIFFE

Certificate lifecycle in Istio: istiod CA, SPIFFE identity, cert rotation, and integration with external CAs.

~1 min read
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What you'll learn
  • istiod = default CA (good for dev)
  • Production: integrate with HashiCorp Vault or cloud CA
  • Trust domain: shared across clusters for multi-cluster mTLS

Certificate Lifecycle

istiod is the default CA. For production: integrate with external CAs (Vault PKI, AWS Private CA, Google CAS) via the Istio CA plugin interface. Cert rotation: Envoy agents receive new certs 24h before expiry. SPIFFE Trust Domain: cluster.local by default, use custom domain for multi-cluster federation.

Key takeaways

  • istiod = default CA (good for dev)
  • Production: integrate with HashiCorp Vault or cloud CA
  • Trust domain: shared across clusters for multi-cluster mTLS

Related concepts

Explore topics that connect to this one.

  • Istio mTLS Encryption Deep Dive
  • secrets encryption vault
  • What is authentication?

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multi cluster istio

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