dirathea / kubectl-unused-volumes

List all unused volumes on your cluster

kubectl-unused-volumes

A kubectl plugin to gather all PVC and output all pvcs that doesn't belong to any workloads. This plugins checks for standard kubernetes workloads :

• DaemonSet
• Deployment
• Job
• StatefulSet

Quick Start

Install unused-volumes via krew

kubectl krew install unused-volumes

# Scan for all unused volumes in current context and default namespace

kubectl unused-volumes

Demo

kubectl-unused-volumes's Issues

panic: runtime error: invalid memory address or nil pointer dereference

Thanks for the tool. It's really cool job.

But on some clusters I get the following error:

$ kubectl unused-volumes

[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0xf90404]

goroutine 1 [running]:
github.com/dirathea/kubectl-unused-volumes/pkg/workload.job.IsEmpty(...)
        /Users/aldiraraharja/ssi-gopath-symlink/src/github.com/dirathea/kubectl-unused-volumes/pkg/workload/workload.go:111
github.com/dirathea/kubectl-unused-volumes/pkg/plugin.RunPlugin(0xc0001b3550, 0xc000408700, 0xc0004496d0, 0xc000139d58, 0x10d99f1)
	/Users/aldiraraharja/ssi-gopath-symlink/src/github.com/dirathea/kubectl-unused-volumes/pkg/plugin/plugin.go:65 +0x32c
github.com/dirathea/kubectl-unused-volumes/cmd/plugin/cli.RootCmd.func2(0xc000285180, 0x1eb2c30, 0x0, 0x0, 0x0, 0x0)
	/Users/aldiraraharja/ssi-gopath-symlink/src/github.com/dirathea/kubectl-unused-volumes/cmd/plugin/cli/root.go:30 +0x31
github.com/spf13/cobra.(*Command).execute(0xc000285180, 0xc00003a1d0, 0x0, 0x0, 0xc000285180, 0xc00003a1d0)
	/Users/aldiraraharja/ssi-gopath-symlink/pkg/mod/github.com/spf13/[email protected]/command.go:762 +0x453
github.com/spf13/cobra.(*Command).ExecuteC(0xc000285180, 0x441d1a, 0x1e02040, 0xc00005c778)
	/Users/aldiraraharja/ssi-gopath-symlink/pkg/mod/github.com/spf13/[email protected]/command.go:850 +0x2fb
github.com/spf13/cobra.(*Command).Execute(...)
	/Users/aldiraraharja/ssi-gopath-symlink/pkg/mod/github.com/spf13/[email protected]/command.go:800
github.com/dirathea/kubectl-unused-volumes/cmd/plugin/cli.InitAndExecute()
	/Users/aldiraraharja/ssi-gopath-symlink/src/github.com/dirathea/kubectl-unused-volumes/cmd/plugin/cli/root.go:50 +0x2b
main.main()
	/Users/aldiraraharja/ssi-gopath-symlink/src/github.com/dirathea/kubectl-unused-volumes/cmd/plugin/main.go:12 +0x20```


I noticed this error occurs with some namespaces where are no any pvc/pv(s) , but job/cronjob exist and a lot pods in status `Completed`

Missing "--all-namespaces" flag

The latest version mentions an "all namespaces" option that does not exist.

$ kubectl unused-volumes --help | grep namespaces
        # Get all unused volumes in all namespaces
        kubectl unused-volumes --all-namespaces

$ kubectl unused-volumes --all-namespaces
unknown flag: --all-namespaces

$ kubectl unused-volumes --version
unknown flag: --version

Workaround :

$ for NAMESPACE in $(kubectl get namespaces | awk '{print $1}') ; do echo " --- ${NAMESPACE} ---" ; kubectl unused-volumes --namespace ${NAMESPACE} --no-headers | egrep -v '^$' ; done

Cannot detect unused PersistentVolumeClaim created by StatefulSet

Hi,

We found that kubectl-unused-volumes cannot report unused PersistentVolumeClaim created by vector, which is a StatefulSet.

The vector uses HPA to adjust replicas in StatefulSet. So when it is scaled-down, kubectl-unused-volumes shall report unused PersistentVolumeClaim. However, they are not reported.

Unable to install unused-volumes plugin on mac OS

Tried installing on Apple mac OS platform it reports below error

Installing plugin: unused-volumes
W0509 12:27:52.985878 6678 install.go:164] failed to install plugin "unused-volumes": plugin "unused-volumes" does not offer installation for this platform
failed to install some plugins: [unused-volumes]: plugin "unused-volumes" does not offer installation for this platform

Darwin 00WKSMAC151146.local 21.2.0 Darwin Kernel Version 21.2.0: Sun Nov 28 20:28:41 PST 2021; root:xnu-8019.61.5~1/RELEASE_ARM64_T6000 arm64

Not reliable

This plug-in is not reliable for older Kubernetes versions. When running on 1.11 cluster gives me output all the pvc names although they are bounded with pods