Display PV/PVCs that are not connected to any POD

[golance-mightydevops]

Here is an example of the PV/PVC that does exists in kubernetes state, yet it's not used (nor exists in AWS volumes)

➜ k get pvc -n metrics   
NAME                                   STATUS   VOLUME                                     CAPACITY   ACCESS MODES   STORAGECLASS   AGE
grafana-persistent-storage             Bound    pvc-1395291c-d89b-11e9-8a64-0a4976158cfe   1Gi        RWO            gp2            398d

➜ k describe pv pvc-1395291c-d89b-11e9-8a64-0a4976158cfe           
Name:              pvc-1395291c-d89b-11e9-8a64-0a4976158cfe
Labels:            failure-domain.beta.kubernetes.io/region=eu-central-1
                   failure-domain.beta.kubernetes.io/zone=eu-central-1c
Annotations:       kubernetes.io/createdby: aws-ebs-dynamic-provisioner
                   pv.kubernetes.io/bound-by-controller: yes
                   pv.kubernetes.io/provisioned-by: kubernetes.io/aws-ebs
Finalizers:        [kubernetes.io/pv-protection]
StorageClass:      gp2
Status:            Bound
Claim:             metrics/grafana-persistent-storage
Reclaim Policy:    Delete
Access Modes:      RWO
VolumeMode:        Filesystem
Capacity:          1Gi
Node Affinity:     
  Required Terms:  
    Term 0:        failure-domain.beta.kubernetes.io/zone in [eu-central-1c]
                   failure-domain.beta.kubernetes.io/region in [eu-central-1]
Message:           
Source:
    Type:       AWSElasticBlockStore (a Persistent Disk resource in AWS)
    VolumeID:   aws://eu-central-1c/vol-0b92b7db07b87b3e8
    FSType:     ext4
    Partition:  0
    ReadOnly:   false
Events:         <none>

➜ aws ec2 describe-volumes --volume-ids vol-0b92b7db07b87b3e8

An error occurred (InvalidVolume.NotFound) when calling the DescribeVolumes operation: The volume 'vol-0b92b7db07b87b3e8' does not exist.

would be nice to see output for these PV, PVCs with POD column empty

[yashbhutwala]

@golance-mightydevops thanks for the useful feedback! I can take a look at adding this when I get some time, meanwhile I'm happy to review a PR if you send one! I'm glad you find utility in this tool and happy for the feedback 😄