Prerequisites

• An existing Kubernetes deployment where at least one Worker Node has a locally-attached drive.

• A local kubectl installation configured to create and access resources on the target Kubernetes deployment.

• Familiarity with Kubernetes environments

• Familiarity with using a Terminal or Shell environment

Procedure

1. Download the MinIO Object

   Download the MinIO Kubernetes Object Definition

   Download minio-dev.yaml to your host machine:

   curl https://raw.githubusercontent.com/minio/docs/master/source/extra/examples/minio-dev.yaml -O
   

   The file describes two Kubernetes resources:

   • A new namespace minio-dev, and

   • A MinIO pod using a drive or volume on the Worker Node for serving data

   Select the Overview of the MinIO Object YAML for a more detailed description of the object.

   Overview of the MinIO Object YAML

   The minio-dev.yaml contains the following Kubernetes resources:

   # Deploys a new Namespace for the MinIO Pod
   apiVersion: v1
   kind: Namespace
   metadata:
     name: minio-dev # Change this value if you want a different namespace name
     labels:
       name: minio-dev # Change this value to match metadata.name
   ---
   # Deploys a new MinIO Pod into the metadata.namespace Kubernetes namespace
   #
   # The `spec.containers[0].args` contains the command run on the pod
   # The `/data` directory corresponds to the `spec.containers[0].volumeMounts[0].mountPath`
   # That mount path corresponds to a Kubernetes HostPath which binds `/data` to a local drive or volume on the worker node where the pod runs
   # 
   apiVersion: v1
   kind: Pod
   metadata:
     labels:
       app: minio
     name: minio
     namespace: minio-dev # Change this value to match the namespace metadata.name
   spec:
     containers:
     - name: minio
       image: quay.io/minio/minio:latest
       command:
       - /bin/bash
       - -c
       args: 
       - minio server /data --console-address :9001
       volumeMounts:
       - mountPath: /data
         name: localvolume # Corresponds to the `spec.volumes` Persistent Volume
     nodeSelector:
       kubernetes.io/hostname: kubealpha.local # Specify a node label associated to the Worker Node on which you want to deploy the pod.
     volumes:
     - name: localvolume
       hostPath: # MinIO generally recommends using locally-attached volumes
         path: /mnt/disk1/data # Specify a path to a local drive or volume on the Kubernetes worker node
         type: DirectoryOrCreate # The path to the last directory must exist
   

   The object deploys two resources:

   • A new namespace minio-dev, and

   • A MinIO pod using a drive or volume on the Worker Node for serving data

   The MinIO resource definition uses Kubernetes Node Selectors and Labels to restrict the pod to a node with matching hostname label. Use kubectl get nodes --show-labels to view all labels assigned to each node in the cluster.

   The MinIO Pod uses a hostPath volume for storing data. This path must correspond to a local drive or folder on the Kubernetes worker node.

   Users familiar with Kubernetes scheduling and volume provisioning may modify the spec.nodeSelector, volumeMounts.name, and volumes fields to meet more specific requirements.

2. Apply the MinIO Object Definition

   The following command applies the minio-dev.yaml configuration and deploys the objects to Kubernetes:

   kubectl apply -f minio-dev.yaml
   

   The command output should resemble the following:

   namespace/minio-dev created
   pod/minio created
   

   You can verify the state of the pod by running kubectl get pods:

   kubectl get pods -n minio-dev
   

   The output should resemble the following:

   NAME    READY   STATUS    RESTARTS   AGE
   minio   1/1     Running   0          77s
   

   You can also use the following commands to retrieve detailed information on the pod status:

   kubectl describe pod/minio -n minio-dev
   
   kubectl logs pod/minio -n minio-dev
   

3. Temporarily Access the MinIO S3 API and Console

   Use the kubectl port-forward command to temporarily forward traffic from the MinIO pod to the local machine:

   kubectl port-forward pod/minio 9000 9090 -n minio-dev
   

   The command forwards the pod ports 9000 and 9090 to the matching port on the local machine while active in the shell. The kubectl port-forward command only functions while active in the shell session. Terminating the session closes the ports on the local machine.

   Note

   The following steps of this procedure assume an active kubectl port-forward command.

   To configure long term access to the pod, configure Ingress or similar network control components within Kubernetes to route traffic to and from the pod. Configuring Ingress is out of the scope for this documentation.

4. Connect your Browser to the MinIO Server

   Access the MinIO Console by opening a browser on the local machine and navigating to http://127.0.0.1:9001.

   Log in to the Console with the credentials minioadmin | minioadmin. These are the default root user credentials.

   

   You can use the MinIO Console for general administration tasks like Identity and Access Management, Metrics and Log Monitoring, or Server Configuration. Each MinIO server includes its own embedded MinIO Console.

   

   For more information, see the MinIO Console documentation.

5. (Optional) Connect the MinIO Client

   If your local machine has mc installed, use the mc alias set command to authenticate and connect to the MinIO deployment:

   mc alias set k8s-minio-dev http://127.0.0.1:9000 minioadmin minioadmin
   mc admin info k8s-minio-dev
   

   • The name of the alias

   • The hostname or IP address and port of the MinIO server

   • The Access Key for a MinIO user

   • The Secret Key for a MinIO user