Incident Library
  • Root cause
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  • Symptom
  • Contributing factor
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  1. IL-0093 Ingress controller pods crash-looped one after another because the leader pod had exhausted its shared memory
    UK Ministry of Justice2020
    Symptoms

    At 10:43 on 14 August 2020 two of the six ingress controller pods in the cluster were in a crash loop. Restarting those pods did not fix them.

    Container crash loop
    Root cause
    Capacity exhaustion
    Component
    Ingress controller
    Contributing factor
    Harmful manual actionSingle point of failure
    Detection

    Two of the six ingress controller pods were seen crash-looping at 10:43; the incident was declared at 11:01.

    Remediation
    • restarted the leader ingress controller pod so the other replicas could connect and get the latest nginx configuration
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By root cause1

Capacity exhaustion1 case

Component
Ingress controller
Contributing factor
Harmful manual actionSingle point of failure
Organisation
UK Ministry of Justice
  1. IL-0093 Ingress controller pods crash-looped one after another because the leader pod had exhausted its shared memory
    UK Ministry of Justice2020