Incident Library
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  1. IL-0089 A test cluster deletion script run with the kube context pointing at the live-1 production cluster deleted its ingress controller, monitoring, logging, cert-manager, kiam and external-dns
    UK Ministry of Justice2020
    Symptoms

    At 18:27 on 21 September 2020 the Cloud Platform team detected that some services running on the live-1 production cluster had gone down, and some users could not reach them. The incident was declared at 18:40.

    Service outageResources deletedMonitoring outageStale endpoint routing
    Trigger

    A script for deleting a test cluster was triggered while the kube context was pointing at the live-1 production cluster instead of the test cluster.

    Root cause
    Operator error
    Component
    Ingress controllerCredential broker for podsexternal-dnsCloud load balancerPrometheus
    Contributing factor
    No safeguard on destructive change
    Detection

    The first detection was at 18:27, and the incident was declared 13 minutes later, at 18:40.

    Remediation
    • restored the default ingress controller together with external-dns and kiam, which it depends on
    • corrected the owner field in the Formbuilder Route 53 TXT records so external-dns pointed their A records at the new NLB
    • restored the remaining components with a targeted apply
    • ran the apply pipeline to restore all certificates, ServiceMonitors and Prometheus rules from the environment repository
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This case involves Cloud load balancer and Credential broker for pods. kubegap audits a Kubernetes cluster for gaps like these, read-only, from Claude Code or Codex; its checks cite public reports like the ones in this library.

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Operator error1 case

Component
Cloud load balancerCredential broker for podsexternal-dnsIngress controllerPrometheus
Contributing factor
No safeguard on destructive change
Organisation
UK Ministry of Justice
  1. IL-0089 A test cluster deletion script run with the kube context pointing at the live-1 production cluster deleted its ingress controller, monitoring, logging, cert-manager, kiam and external-dns
    UK Ministry of Justice2020