MinIO vs microk8s Findings

minio_microk8s.md

I could not reproduce the failure condition. I installed a 1-node cluster using this on Ubuntu 20.04 (Intel NUC).

INSTALLATION

This is from a user account with sudo privilege.

sudo snap install microk8s --classic --channel=1.19
sudo usermod -a -G microk8s $USER
sudo apparmor_parser -r /etc/apparmor.d/*snap-confine*
sudo apparmor_parser -r /var/lib/snapd/apparmor/profiles/snap-confine*
microk8s enable dns storage

KUBECTL CONFIG

## KUBECTL
microk8s config > ~/.kube/microk8s.config
chmod 600 ~/.kube/microk8s.config
export KUBECONFIG=~./kube/microk8s.config

MINIO TEST

Install MinIO with defaults:

helm repo add minio https://helm.min.io/
helm install minio minio/minio

Check Results

## kubectl get all  
get all
NAME                         READY   STATUS    RESTARTS   AGE
pod/minio-848f9f7dc9-8g6zz   1/1     Running   0          92s

NAME                 TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)    AGE
service/kubernetes   ClusterIP   10.152.183.1    <none>        443/TCP    57m
service/minio        ClusterIP   10.152.183.41   <none>        9000/TCP   92s

NAME                    READY   UP-TO-DATE   AVAILABLE   AGE
deployment.apps/minio   1/1     1            1           92s

NAME                               DESIRED   CURRENT   READY   AGE
replicaset.apps/minio-848f9f7dc9   1         1         1       92s

## kubectl get pvc
NAME    STATUS   VOLUME                                     CAPACITY   ACCESS MODES   STORAGECLASS        AGE
minio   Bound    pvc-d2696298-cebc-49fc-b828-82b88a2661a0   500Gi      RWO            microk8s-hostpath   12m

## kubectl get pv
NAME                                       CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS   CLAIM           STORAGECLASS        REASON   AGE
pvc-d2696298-cebc-49fc-b828-82b88a2661a0   500Gi      RWO            Delete           Bound    default/minio   microk8s-hostpath            12m

ABOUT STORAGE ENVIRONMENT

## kubectl get sc
NAME                          PROVISIONER            RECLAIMPOLICY   VOLUMEBINDINGMODE   ALLOWVOLUMEEXPANSION   AGE
microk8s-hostpath (default)   microk8s.io/hostpath   Delete          Immediate           false                  21m

## kubectl describe sc/microk8s-hostpath
Name:            microk8s-hostpath
IsDefaultClass:  Yes
Annotations:     kubectl.kubernetes.io/last-applied-configuration={"apiVersion":"storage.k8s.io/v1","kind":"StorageClass","metadata":{"annotations":{"storageclass.kubernetes.io/is-default-class":"true"},"name":"microk8s-hostpath"},"provisioner":"microk8s.io/hostpath"}
,storageclass.kubernetes.io/is-default-class=true
Provisioner:           microk8s.io/hostpath
Parameters:            <none>
AllowVolumeExpansion:  <unset>
MountOptions:          <none>
ReclaimPolicy:         Delete
VolumeBindingMode:     Immediate
Events:                <none>