decommission

• Create cluster

createcluster nodeport

• install operator

installoperator nodeport

• install tenant lite

installtenant nodeport

• increase from 1 pool to 2 pools

• Wait couple of minutes until is ready:

• Get status:

mc alias set myminio https://localhost:30081 minio minio123 --insecure
mc admin decommission status myminio --insecure

Expected:

$ mc admin decommission status myminio --insecure
┌─────┬───────────────────────────────────────────────────────────────────────────────────────┬────────────────────────┬────────┐
│ ID  │ Pools                                                                                 │ Raw Drives Usage       │ Status │
│ 1st │ https://myminio-pool-0-{0...3}.myminio-hl.tenant-lite.svc.cluster.local/export{0...1} │ 16.2% (total: 332 GiB) │ Active │
│ 2nd │ https://myminio-pool-1-{0...3}.myminio-hl.tenant-lite.svc.cluster.local/export{0...1} │ 16.2% (total: 332 GiB) │ Active │
└─────┴───────────────────────────────────────────────────────────────────────────────────────┴────────────────────────┴────────┘

• Start Decommission:

mc admin decommission start myminio/ https://myminio-pool-0-{0...3}.myminio-hl.tenant-lite.svc.cluster.local/export{0...1} --insecure

Expected:

$ mc admin decommission start myminio/ https://myminio-pool-0-{0...3}.myminio-hl.tenant-lite.svc.cluster.local/export{0...1} --insecure
Decommission started successfully for `https://myminio-pool-0-{0...3}.myminio-hl.tenant-lite.svc.cluster.local/export{0...1}`.

• Monitor until complete:

$ mc admin decommission status myminio/ --insecure
┌─────┬───────────────────────────────────────────────────────────────────────────────────────┬────────────────────────┬──────────┐
│ ID  │ Pools                                                                                 │ Raw Drives Usage       │ Status   │
│ 1st │ https://myminio-pool-0-{0...3}.myminio-hl.tenant-lite.svc.cluster.local/export{0...1} │ 16.2% (total: 332 GiB) │ Complete │
│ 2nd │ https://myminio-pool-1-{0...3}.myminio-hl.tenant-lite.svc.cluster.local/export{0...1} │ 16.2% (total: 332 GiB) │ Active   │
└─────┴───────────────────────────────────────────────────────────────────────────────────────┴────────────────────────┴──────────┘

• Remove decommissioned pool from tenant spec

k edit tenant storage-lite -n tenant-lite

Cesars-MacBook-Pro:~ cniackz$ k edit tenant storage-lite -n tenant-lite
tenant.minio.min.io/storage-lite edited

• Operator log:

I0130 15:18:40.193678       1 event.go:298] Event(v1.ObjectReference{Kind:"Tenant", Namespace:"tenant-lite", Name:"myminio", UID:"58a44125-aff4-4b93-8b7f-95367bc4fceb", APIVersion:"minio.min.io/v2", ResourceVersion:"2509", FieldPath:""}): type: 'Normal' reason: 'PoolRemoved' Tenant pool myminio-pool-0 removed

• Status:

$ mc admin decommission status myminio --insecure
┌─────┬───────────────────────────────────────────────────────────────────────────────────────┬────────────────────────┬────────┐
│ ID  │ Pools                                                                                 │ Raw Drives Usage       │ Status │
│ 2nd │ https://myminio-pool-1-{0...3}.myminio-hl.tenant-lite.svc.cluster.local/export{0...1} │ 14.9% (total: 332 GiB) │ Active │
└─────┴───────────────────────────────────────────────────────────────────────────────────────┴────────────────────────┴────────┘

• Pods from pool 0 are gone, pods from pool 1 are present:

$ k get pods -n tenant-lite
NAME               READY   STATUS    RESTARTS   AGE
myminio-pool-1-0   2/2     Running   0          9m40s
myminio-pool-1-1   2/2     Running   0          9m43s
myminio-pool-1-2   2/2     Running   0          9m46s
myminio-pool-1-3   2/2     Running   0          10m

Additional Notes:

1. Decommission worked in 4.5.8
2. Decommission worked in 5.0.11