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ekristen/shell-one-liner-remove-bad-finalizer.sh

Created January 30, 2020 19:06
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Shell One Liner to Remove Bad Finalizer From Kubernetes Resources
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shell-one-liner-remove-bad-finalizer.sh
# Swap pod for any resource you need to iterate over. (ie daemonset, deployment)
kubectl get pods --all-namespaces | tail -n+2 | awk '{print $1 " " $2}' | xargs -L1 bash -c "kubectl patch -n \$0 pod/\$1 --type=merge -p \$(kubectl get -n \$0 pod/\$1 -o json | jq -Mcr '.metadata.finalizers // [] | {metadata:{finalizers:map(select(. != \"name-of-bad-finalizer\"))}}')"
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dulek commented Dec 22, 2022 •
edited

If you want to be safe from race conditions and lost updates, you got to use kubectl replace and pass whole resource so that resourceVersion is checked. Something like this for a single-resource version:

kubectl get -n $ns $res $name -o json | jq -Mcr "if .metadata.finalizers != null then del(.metadata.finalizers[] | select(. == \"name-of-bad-finalizer\")) else . end" | kubectl replace -n $ns $res $name -f -

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