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Sealed Secrets Encryption

⬢ 層級 2技術
高
薪資影響
4 個月
學習時長
中等
難度
—
職業
一覽

Sealed Secrets is a Kubernetes controller that encrypts secrets with a sealing key (RSA). Secrets are encrypted client-side before committing to Git, then decrypted only on the cluster with the private key. Used by DevOps/SRE teams managing infrastructure-as-code. Salary band: USD 110k–190k. Learn in 4 weeks. Adjacent to Kubernetes secrets, SOPS, Vault.

什麼是 Sealed Secrets Encryption

Sealed Secrets is a Kubernetes controller (from Bitnami) that encrypts Kubernetes secrets before they're stored in Git or etcd. You use the kubeseal CLI to encrypt a secret with the cluster's public RSA key; only that cluster (with the private key) can decrypt it. This allows developers to safely commit encrypted secrets to version control without exposing plain-text credentials. The workflow: create a Kubernetes secret YAML, encrypt it with kubeseal, commit the encrypted version to Git, and when the secret is applied to the cluster, the Sealed Secrets controller automatically decrypts it. It's transparent to applications, they read the decrypted secret as a normal K8s secret.

🔧 工具與生態
kubeseal CLIKubernetes API serverRSA key managementkubectlHelmGitOps platforms (ArgoCD)OpenSSLDocker

💰 各地區薪資

地區初級中級高級
USA$85,000$135,000$190,000
UK£50,000£85,000£130,000
EU€55,000€90,000€140,000
CANADACA$80,000CA$125,000CA$175,000

❓ 常見問題

How does Sealed Secrets differ from regular Kubernetes secrets?
Regular K8s secrets are base64-encoded (not encrypted); Sealed Secrets encrypts them with the cluster's public key before storing in Git. Only the cluster (with the private key) can decrypt. This makes secrets safe to commit to version control.
Can I move a sealed secret to a different cluster?
No, sealed secrets are encrypted for a specific cluster's public key. Moving requires re-sealing with the new cluster's key. This prevents leaked sealed secrets from being decrypted on an attacker's cluster.
How do I backup and restore the sealing key?
Extract the sealing key with `kubectl get secret -n kube-system sealed-secrets-key` and store offline. To restore on a new cluster, create the secret with the same data. Loss of the key means sealed secrets are unrecoverable.
What's the performance impact of Sealed Secrets?
Minimal. Decryption happens once at pod startup. Encrypted secret is stored in etcd as a regular K8s secret. Overhead is negligible for typical workloads.
Can I use Sealed Secrets with Helm?
Yes. Encrypt individual secret values and reference them in `values.yaml`, or use Helm plugins like helm-secrets to integrate encryption/decryption with Helm templating.

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