DevOps. Self-hosted. Security.
RSS FeedNotes on DevOps, infrastructure, self-hosting and cybersecurity — practical guides from real-world operations.
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Recent Posts
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Karpenter: just-in-time nodes and half the cluster bill
Cluster Autoscaler scales pre-sized node groups, Karpenter picks the right instance for the actual pending pods and collapses the cluster when idle. NodePool/NodeClass, consolidation, spot fallback, and the traps that block it — with a working manifest.
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External Secrets Operator: Vault secrets in Kubernetes without copy-paste
External Secrets Operator syncs secrets from Vault and cloud Secret Managers straight into native Kubernetes Secrets. The SecretStore/ExternalSecret model, refreshInterval rotation, and a working Vault example.
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Trivy in CI: catch vulns and generate an SBOM before prod
One pipeline step blocks vulnerable images from shipping and hands you an SBOM on the way. What Trivy scans, how to gate on severity, how to quiet the noise with .trivyignore and VEX, and how it ties into keyless signing.
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Sentry: catch prod errors before your users do
Logs say 'something broke'; Sentry says what, for whom, and in which release. Error grouping, breadcrumbs, releases and source maps, how to quiet the noise, and how to self-host it.