Managing Sealed Secrets

Sealed Secrets Management Skill

Manage and analyze Bitnami Sealed Secrets, certificates, and controller health in Kubernetes.

Tool Conventions

Prerequisites

kubeseal CLI and kubectl must be installed. The sealed-secrets controller must be running in the cluster.

Core Helper Function

#!/bin/bash

sealed_secrets_ns="${SEALED_SECRETS_NAMESPACE:-kube-system}"
sealed_secrets_controller="${SEALED_SECRETS_CONTROLLER:-sealed-secrets-controller}"

Output Rules

• TOKEN EFFICIENCY: Extract only needed fields
• Target <=50 lines per script output
• NEVER output decrypted secret values -- only output secret names and metadata
• Never dump full secret data

Discovery Phase

Controller Health

#!/bin/bash
echo "=== Sealed Secrets Controller ==="
kubectl get deployment "${sealed_secrets_controller}" -n "${sealed_secrets_ns}" -o json \
    | jq '{name: .metadata.name, namespace: .metadata.namespace, replicas: .status.readyReplicas, available: .status.availableReplicas, image: .spec.template.spec.containers[0].image}'

echo ""
echo "=== Controller Pod Status ==="
kubectl get pods -n "${sealed_secrets_ns}" -l "app.kubernetes.io/name=sealed-secrets" -o json \
    | jq -r '.items[] | "\(.metadata.name)\t\(.status.phase)\t\(.status.containerStatuses[0].restartCount) restarts"' | column -t

echo ""
echo "=== Active Sealing Key ==="
kubeseal --fetch-cert --controller-name="${sealed_secrets_controller}" --controller-namespace="${sealed_secrets_ns}" 2>/dev/null \
    | openssl x509 -noout -dates 2>/dev/null || echo "Could not fetch certificate"

List Sealed Secrets

#!/bin/bash
NAMESPACE="${1:-}"

echo "=== Sealed Secrets ==="
if [ -n "$NAMESPACE" ]; then
    kubectl get sealedsecrets -n "$NAMESPACE" -o json
else
    kubectl get sealedsecrets --all-namespaces -o json
fi | jq -r '.items[] | "\(.metadata.namespace)\t\(.metadata.name)\t\(.metadata.creationTimestamp[0:16])"' \
    | column -t | head -25

Analysis Phase

Certificate Lifecycle

#!/bin/bash
echo "=== Sealing Keys ==="
kubectl get secrets -n "${sealed_secrets_ns}" -l "sealedsecrets.bitnami.com/sealed-secrets-key=active" -o json \
    | jq -r '.items[] | "\(.metadata.name)\t\(.metadata.creationTimestamp[0:16])\tactive"' | column -t

echo ""
echo "=== Certificate Expiry ==="
kubeseal --fetch-cert --controller-name="${sealed_secrets_controller}" --controller-namespace="${sealed_secrets_ns}" 2>/dev/null \
    | openssl x509 -noout -subject -dates 2>/dev/null

echo ""
echo "=== Key Rotation History ==="
kubectl get secrets -n "${sealed_secrets_ns}" -l "sealedsecrets.bitnami.com/sealed-secrets-key" -o json \
    | jq -r '.items | sort_by(.metadata.creationTimestamp) | .[] | "\(.metadata.name)\t\(.metadata.creationTimestamp[0:16])"' | column -t

Audit Sealed Secrets

#!/bin/bash
echo "=== Sealed Secrets by Namespace ==="
kubectl get sealedsecrets --all-namespaces -o json \
    | jq -r '.items[] | .metadata.namespace' | sort | uniq -c | sort -rn | head -15

echo ""
echo "=== Recently Modified ==="
kubectl get sealedsecrets --all-namespaces -o json \
    | jq -r '.items | sort_by(.metadata.creationTimestamp) | reverse | .[0:10][] | "\(.metadata.namespace)\t\(.metadata.name)\t\(.metadata.creationTimestamp[0:16])"' \
    | column -t

Output Format

• Use tab-separated columns with column -t
• Limit lists to 15-25 items
• NEVER display secret values -- only names and metadata
• Show summaries before details

Anti-Hallucination Rules

1. NEVER assume resource names — always discover via CLI/API in Phase 1 before referencing in Phase 2.
2. NEVER fabricate metric names or dimensions — verify against the service documentation or --help output.
3. NEVER mix CLI commands between service versions — confirm which version/API you are targeting.
4. ALWAYS use the discovery → verify → analyze chain — every resource referenced must have been discovered first.
5. ALWAYS handle empty results gracefully — an empty response is valid data, not an error to retry.

Counter-Rationalizations

Common Pitfalls

• Never expose values: Only display sealed secret names, never decrypted data
• Namespace scope: By default, sealed secrets are scoped to a specific namespace -- use --scope flag to change
• Certificate rotation: Sealed secrets controller rotates keys every 30 days by default -- old keys are kept for decryption
• Re-encryption: After key rotation, existing sealed secrets still work but should be re-encrypted with new key
• Controller namespace: Default is kube-system but may vary -- check SEALED_SECRETS_NAMESPACE
• Scope modes: strict (default, namespace+name bound), namespace-wide, cluster-wide