573 lines
21 KiB
Markdown
573 lines
21 KiB
Markdown
# Cloud Native Deployment of Minio on Kubernetes [](https://slack.minio.io) [](https://goreportcard.com/report/minio/minio) [](https://hub.docker.com/r/minio/minio/) [](https://codecov.io/gh/minio/minio)
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## Table of Contents
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- [Prerequisites](#prerequisites)
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- [Minio Standalone Server Deployment](#minio-standalone-server-deployment)
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- [Standalone Quickstart](#standalone-quickstart)
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- [Create Persistent Volume Claim](#create-persistent-volume-claim)
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- [Create Deployment](#create-minio-deployment)
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- [Create LoadBalancer Service](#create-minio-service)
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- [Update existing Minio Deployment](#update-existing-minio-deployment)
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- [Resource cleanup](#standalone-resource-cleanup)
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- [Minio Distributed Server Deployment](#minio-distributed-server-deployment)
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- [Distributed Quickstart](#distributed-quickstart)
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- [Create Minio Headless Service](#create-minio-headless-service)
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- [Create Minio Statefulset](#create-minio-statefulset)
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- [Create LoadBalancer Service](#create-minio-service)
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- [Update existing Minio StatefulSet](#update-existing-minio-statefulset)
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- [Resource cleanup](#distributed-resource-cleanup)
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- [Minio GCS Gateway Deployment](#minio-gcs-gateway-deployment)
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- [GCS Gateway Quickstart](#gcs-gateway-quickstart)
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- [Create GCS Credentials Secret](#create-gcs-credentials-secret)
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- [Create Minio GCS Gateway Deployment](#create-minio-gcs-gateway-deployment)
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- [Create Minio LoadBalancer Service](#create-minio-loadbalancer-service)
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- [Update Existing Minio GCS Deployment](#update-existing-minio-gcs-deployment)
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- [Resource cleanup](#gcs-gateway-resource-cleanup)
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## Prerequisites
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To run this example, you need Kubernetes version >=1.4 cluster installed and running, and that you have installed the [`kubectl`](https://kubernetes.io/docs/tasks/kubectl/install/) command line tool in your path. Please see the [getting started guides](https://kubernetes.io/docs/getting-started-guides/) for installation instructions for your platform.
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## Minio Standalone Server Deployment
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The following section describes the process to deploy standalone [Minio](https://minio.io/) server on Kubernetes. The deployment uses the [official Minio Docker image](https://hub.docker.com/r/minio/minio/~/dockerfile/) from Docker Hub.
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This section uses following core components of Kubernetes:
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- [_Pods_](https://kubernetes.io/docs/user-guide/pods/)
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- [_Services_](https://kubernetes.io/docs/user-guide/services/)
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- [_Deployments_](https://kubernetes.io/docs/user-guide/deployments/)
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- [_Persistent Volume Claims_](https://kubernetes.io/docs/user-guide/persistent-volumes/#persistentvolumeclaims)
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### Standalone Quickstart
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Run the below commands to get started quickly
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```sh
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kubectl create -f https://github.com/minio/minio/blob/master/docs/orchestration/kubernetes-yaml/minio-standalone-pvc.yaml?raw=true
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kubectl create -f https://github.com/minio/minio/blob/master/docs/orchestration/kubernetes-yaml/minio-standalone-deployment.yaml?raw=true
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kubectl create -f https://github.com/minio/minio/blob/master/docs/orchestration/kubernetes-yaml/minio-standalone-service.yaml?raw=true
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```
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### Create Persistent Volume Claim
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Minio needs persistent storage to store objects. If there is no
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persistent storage, the data stored in Minio instance will be stored in the container file system and will be wiped off as soon as the container restarts.
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Create a persistent volume claim (PVC) to request storage for the Minio instance. Kubernetes looks out for PVs matching the PVC request in the cluster and binds it to the PVC automatically.
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This is the PVC description.
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```sh
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apiVersion: v1
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kind: PersistentVolumeClaim
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metadata:
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# This name uniquely identifies the PVC. This is used in deployment.
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name: minio-pv-claim
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spec:
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# Read more about access modes here: http://kubernetes.io/docs/user-guide/persistent-volumes/#access-modes
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accessModes:
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# The volume is mounted as read-write by a single node
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- ReadWriteOnce
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resources:
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# This is the request for storage. Should be available in the cluster.
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requests:
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storage: 10Gi
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```
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Create the PersistentVolumeClaim
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```sh
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kubectl create -f https://github.com/minio/minio/blob/master/docs/orchestration/kubernetes-yaml/minio-standalone-pvc.yaml?raw=true
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persistentvolumeclaim "minio-pv-claim" created
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```
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### Create Minio Deployment
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A deployment encapsulates replica sets and pods — so, if a pod goes down, replication controller makes sure another pod comes up automatically. This way you won’t need to bother about pod failures and will have a stable Minio service available.
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This is the deployment description.
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```sh
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apiVersion: extensions/v1beta1
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kind: Deployment
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metadata:
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# This name uniquely identifies the Deployment
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name: minio
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spec:
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strategy:
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# Specifies the strategy used to replace old Pods by new ones
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# Refer: https://kubernetes.io/docs/concepts/workloads/controllers/deployment/#strategy
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type: Recreate
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template:
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metadata:
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labels:
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# This label is used as a selector in Service definition
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app: minio
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spec:
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# Volumes used by this deployment
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volumes:
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- name: data
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# This volume is based on PVC
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persistentVolumeClaim:
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# Name of the PVC created earlier
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claimName: minio-pv-claim
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containers:
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- name: minio
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# Volume mounts for this container
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volumeMounts:
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# Volume 'data' is mounted to path '/data'
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- name: data
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mountPath: "/data"
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# Pulls the lastest Minio image from Docker Hub
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image: minio/minio:RELEASE.2018-04-19T22-54-58Z
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args:
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- server
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- /data
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env:
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# Minio access key and secret key
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- name: MINIO_ACCESS_KEY
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value: "minio"
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- name: MINIO_SECRET_KEY
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value: "minio123"
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ports:
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- containerPort: 9000
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# Readiness probe detects situations when Minio server instance
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# is not ready to accept traffic. Kubernetes doesn't forward
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# traffic to the pod till readiness checks fail.
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readinessProbe:
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httpGet:
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path: /minio/health/ready
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port: 9000
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initialDelaySeconds: 120
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periodSeconds: 20
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# Liveness probe detects situations where Minio server instance
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# is not working properly and needs restart. Kubernetes automatically
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# restarts the pods if liveness checks fail.
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livenessProbe:
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httpGet:
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path: /minio/health/live
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port: 9000
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initialDelaySeconds: 120
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periodSeconds: 20
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```
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Create the Deployment
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```sh
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kubectl create -f https://github.com/minio/minio/blob/master/docs/orchestration/kubernetes-yaml/minio-standalone-deployment.yaml?raw=true
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deployment "minio-deployment" created
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```
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### Create Minio Service
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Now that you have a Minio deployment running, you may either want to access it internally (within the cluster) or expose it as a Service onto an external (outside of your cluster, maybe public internet) IP address, depending on your use case. You can achieve this using Services. There are 3 major service types — default type is ClusterIP, which exposes a service to connection from inside the cluster. NodePort and LoadBalancer are two types that expose services to external traffic.
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In this example, we expose the Minio Deployment by creating a LoadBalancer service. This is the service description.
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```sh
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apiVersion: v1
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kind: Service
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metadata:
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# This name uniquely identifies the service
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name: minio-service
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spec:
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type: LoadBalancer
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ports:
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- port: 9000
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targetPort: 9000
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protocol: TCP
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selector:
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# Looks for labels `app:minio` in the namespace and applies the spec
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app: minio
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```
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Create the Minio service
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```sh
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kubectl create -f https://github.com/minio/minio/blob/master/docs/orchestration/kubernetes-yaml/minio-standalone-service.yaml?raw=true
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service "minio-service" created
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```
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The `LoadBalancer` service takes couple of minutes to launch. To check if the service was created successfully, run the command
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```sh
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kubectl get svc minio-service
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NAME CLUSTER-IP EXTERNAL-IP PORT(S) AGE
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minio-service 10.55.248.23 104.199.249.165 9000:31852/TCP 1m
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```
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### Update existing Minio Deployment
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You can update an existing Minio deployment to use a newer Minio release. To do this, use the `kubectl set image` command:
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```sh
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kubectl set image deployment/minio-deployment minio=<replace-with-new-minio-image>
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```
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Kubernetes will restart the deployment to update the image. You will get a message as shown below, on successful update:
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```
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deployment "minio-deployment" image updated
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```
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### Standalone Resource cleanup
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You can cleanup the cluster using
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```sh
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kubectl delete deployment minio \
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&& kubectl delete pvc minio-pv-claim \
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&& kubectl delete svc minio-service
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```
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## Minio Distributed Server Deployment
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The following document describes the process to deploy [distributed Minio](https://docs.minio.io/docs/distributed-minio-quickstart-guide) server on Kubernetes. This example uses the [official Minio Docker image](https://hub.docker.com/r/minio/minio/~/dockerfile/) from Docker Hub.
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This example uses following core components of Kubernetes:
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- [_Pods_](https://kubernetes.io/docs/concepts/workloads/pods/pod/)
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- [_Services_](https://kubernetes.io/docs/concepts/services-networking/service/)
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- [_Statefulsets_](https://kubernetes.io/docs/tutorials/stateful-application/basic-stateful-set/)
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### Distributed Quickstart
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Run the below commands to get started quickly
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```sh
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kubectl create -f https://github.com/minio/minio/blob/master/docs/orchestration/kubernetes-yaml/minio-distributed-headless-service.yaml?raw=true
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kubectl create -f https://github.com/minio/minio/blob/master/docs/orchestration/kubernetes-yaml/minio-distributed-statefulset.yaml?raw=true
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kubectl create -f https://github.com/minio/minio/blob/master/docs/orchestration/kubernetes-yaml/minio-distributed-service.yaml?raw=true
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```
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### Create Minio Headless Service
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Headless Service controls the domain within which StatefulSets are created. The domain managed by this Service takes the form: `$(service name).$(namespace).svc.cluster.local` (where “cluster.local” is the cluster domain), and the pods in this domain take the form: `$(pod-name-{i}).$(service name).$(namespace).svc.cluster.local`. This is required to get a DNS resolvable URL for each of the pods created within the Statefulset.
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This is the Headless service description.
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```sh
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apiVersion: v1
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kind: Service
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metadata:
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name: minio
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labels:
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app: minio
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spec:
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clusterIP: None
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ports:
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- port: 9000
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name: minio
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selector:
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app: minio
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```
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Create the Headless Service
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```sh
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$ kubectl create -f https://github.com/minio/minio/blob/master/docs/orchestration/kubernetes-yaml/minio-distributed-headless-service.yaml?raw=true
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service "minio" created
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```
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### Create Minio Statefulset
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A StatefulSet provides a deterministic name and a unique identity to each pod, making it easy to deploy stateful distributed applications. To launch distributed Minio you need to pass drive locations as parameters to the minio server command. Then, you’ll need to run the same command on all the participating pods. StatefulSets offer a perfect way to handle this requirement.
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This is the Statefulset description.
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```sh
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apiVersion: apps/v1beta1
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kind: StatefulSet
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metadata:
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# This name uniquely identifies the StatefulSet
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name: minio
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spec:
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serviceName: minio
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replicas: 4
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selector:
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matchLabels:
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app: minio # has to match .spec.template.metadata.labels
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template:
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metadata:
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labels:
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app: minio # has to match .spec.selector.matchLabels
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spec:
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containers:
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- name: minio
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env:
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- name: MINIO_ACCESS_KEY
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value: "minio"
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- name: MINIO_SECRET_KEY
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value: "minio123"
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image: minio/minio:RELEASE.2018-04-19T22-54-58Z
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args:
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- server
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- http://minio-0.minio.default.svc.cluster.local/data
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- http://minio-1.minio.default.svc.cluster.local/data
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- http://minio-2.minio.default.svc.cluster.local/data
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- http://minio-3.minio.default.svc.cluster.local/data
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ports:
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- containerPort: 9000
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# These volume mounts are persistent. Each pod in the PetSet
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# gets a volume mounted based on this field.
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volumeMounts:
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- name: data
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mountPath: /data
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# Liveness probe detects situations where Minio server instance
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# is not working properly and needs restart. Kubernetes automatically
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# restarts the pods if liveness checks fail.
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livenessProbe:
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httpGet:
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path: /minio/health/live
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port: 9000
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initialDelaySeconds: 120
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periodSeconds: 20
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# These are converted to volume claims by the controller
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# and mounted at the paths mentioned above.
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volumeClaimTemplates:
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- metadata:
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name: data
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spec:
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accessModes:
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- ReadWriteOnce
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resources:
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requests:
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storage: 10Gi
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```
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Create the Statefulset
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```sh
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$ kubectl create -f https://github.com/minio/minio/blob/master/docs/orchestration/kubernetes-yaml/minio-distributed-statefulset.yaml?raw=true
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statefulset "minio" created
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```
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### Create Minio Service
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Now that you have a Minio statefulset running, you may either want to access it internally (within the cluster) or expose it as a Service onto an external (outside of your cluster, maybe public internet) IP address, depending on your use case. You can achieve this using Services. There are 3 major service types — default type is ClusterIP, which exposes a service to connection from inside the cluster. NodePort and LoadBalancer are two types that expose services to external traffic.
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In this example, we expose the Minio Deployment by creating a LoadBalancer service. This is the service description.
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```sh
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apiVersion: v1
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kind: Service
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metadata:
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name: minio-service
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spec:
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type: LoadBalancer
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ports:
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- port: 9000
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targetPort: 9000
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protocol: TCP
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selector:
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app: minio
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```
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Create the Minio service
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```sh
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$ kubectl create -f https://github.com/minio/minio/blob/master/docs/orchestration/kubernetes-yaml/minio-distributed-service.yaml?raw=true
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service "minio-service" created
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```
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The `LoadBalancer` service takes couple of minutes to launch. To check if the service was created successfully, run the command
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```sh
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$ kubectl get svc minio-service
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NAME CLUSTER-IP EXTERNAL-IP PORT(S) AGE
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minio-service 10.55.248.23 104.199.249.165 9000:31852/TCP 1m
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```
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### Update existing Minio StatefulSet
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You can update an existing Minio StatefulSet to use a newer Minio release. To do this, use the `kubectl patch statefulset` command:
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```sh
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kubectl patch statefulset minio --type='json' -p='[{"op": "replace", "path": "/spec/template/spec/containers/0/image", "value":"<replace-with-new-minio-image>"}]'
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```
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On successful update, you should see the output below
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```
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statefulset "minio" patched
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```
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Then delete all the pods in your StatefulSet one by one as shown below. Kubernetes will restart those pods for you, using the new image.
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```sh
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kubectl delete minio-0
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```
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### Resource cleanup
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You can cleanup the cluster using
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```sh
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kubectl delete statefulset minio \
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&& kubectl delete svc minio \
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&& kubectl delete svc minio-service
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```
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## Minio GCS Gateway Deployment
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The following section describes the process to deploy [Minio](https://minio.io/) GCS Gateway on Kubernetes. The deployment uses the [official Minio Docker image](https://hub.docker.com/r/minio/minio/~/dockerfile/) from Docker Hub.
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This section uses following core components of Kubernetes:
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- [_Secrets_](https://kubernetes.io/docs/concepts/configuration/secret/)
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- [_Services_](https://kubernetes.io/docs/user-guide/services/)
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- [_Deployments_](https://kubernetes.io/docs/user-guide/deployments/)
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### GCS Gateway Quickstart
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Create the Google Cloud Service credentials file using the steps mentioned [here](https://github.com/minio/minio/blob/master/docs/gateway/gcs.md#create-service-account-key-for-gcs-and-get-the-credentials-file).
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Use the path of file generated above to create a Kubernetes `secret`.
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```sh
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kubectl create secret generic gcs-credentials --from-file=/path/to/gcloud/credentials/application_default_credentials.json
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```
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Then download the `minio-gcs-gateway-deployment.yaml` file
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```sh
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wget https://github.com/minio/minio/blob/master/docs/orchestration/kubernetes-yaml/minio-gcs-gateway-deployment.yaml?raw=true
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```
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Update the section `gcp_project_id` with your GCS project ID. Then run
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```sh
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kubectl create -f minio-gcs-gateway-deployment.yaml
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kubectl create -f https://github.com/minio/minio/blob/master/docs/orchestration/kubernetes-yaml/minio-gcs-gateway-service.yaml?raw=true
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```
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### Create GCS Credentials Secret
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A `secret` is intended to hold sensitive information, such as passwords, OAuth tokens, and ssh keys. Putting this information in a secret is safer and more flexible than putting it verbatim in a pod definition or in a docker image.
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Create the Google Cloud Service credentials file using the steps mentioned [here](https://github.com/minio/minio/blob/master/docs/gateway/gcs.md#create-service-account-key-for-gcs-and-get-the-credentials-file).
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Use the path of file generated above to create a Kubernetes `secret`.
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```sh
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kubectl create secret generic gcs-credentials --from-file=/path/to/gcloud/credentials/application_default_credentials.json
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```
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### Create Minio GCS Gateway Deployment
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A deployment encapsulates replica sets and pods — so, if a pod goes down, replication controller makes sure another pod comes up automatically. This way you won’t need to bother about pod failures and will have a stable Minio service available.
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Minio Gateway uses GCS as its storage backend and need to use a GCP `projectid` to identify your credentials. Update the section `gcp_project_id` with your
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GCS project ID. This is the deployment description.
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```sh
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apiVersion: extensions/v1beta1
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kind: Deployment
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metadata:
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# This name uniquely identifies the Deployment
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name: minio-deployment
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spec:
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strategy:
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type: Recreate
|
||
template:
|
||
metadata:
|
||
labels:
|
||
# Label is used as selector in the service.
|
||
app: minio
|
||
spec:
|
||
# Refer to the secret created earlier
|
||
volumes:
|
||
- name: gcs-credentials
|
||
secret:
|
||
# Name of the Secret created earlier
|
||
secretName: gcs-credentials
|
||
containers:
|
||
- name: minio
|
||
# Pulls the default Minio image from Docker Hub
|
||
image: minio/minio:RELEASE.2018-04-19T22-54-58Z
|
||
args:
|
||
- gateway
|
||
- gcs
|
||
- gcp_project_id
|
||
env:
|
||
# Minio access key and secret key
|
||
- name: MINIO_ACCESS_KEY
|
||
value: "minio"
|
||
- name: MINIO_SECRET_KEY
|
||
value: "minio123"
|
||
# Google Cloud Service uses this variable
|
||
- name: GOOGLE_APPLICATION_CREDENTIALS
|
||
value: "/etc/credentials/application_default_credentials.json"
|
||
ports:
|
||
- containerPort: 9000
|
||
# Mount the volume into the pod
|
||
volumeMounts:
|
||
- name: gcs-credentials
|
||
mountPath: "/etc/credentials"
|
||
readOnly: true
|
||
```
|
||
|
||
Create the Deployment
|
||
|
||
```sh
|
||
kubectl create -f https://github.com/minio/minio/blob/master/docs/orchestration/kubernetes-yaml/minio-gcs-gateway-deployment.yaml?raw=true
|
||
deployment "minio-deployment" created
|
||
```
|
||
|
||
### Create Minio LoadBalancer Service
|
||
|
||
Now that you have a Minio deployment running, you may either want to access it internally (within the cluster) or expose it as a Service onto an external (outside of your cluster, maybe public internet) IP address, depending on your use case. You can achieve this using Services. There are 3 major service types — default type is ClusterIP, which exposes a service to connection from inside the cluster. NodePort and LoadBalancer are two types that expose services to external traffic.
|
||
|
||
In this example, we expose the Minio Deployment by creating a LoadBalancer service. This is the service description.
|
||
|
||
```sh
|
||
apiVersion: v1
|
||
kind: Service
|
||
metadata:
|
||
name: minio-service
|
||
spec:
|
||
type: LoadBalancer
|
||
ports:
|
||
- port: 9000
|
||
targetPort: 9000
|
||
protocol: TCP
|
||
selector:
|
||
app: minio
|
||
```
|
||
Create the Minio service
|
||
|
||
```sh
|
||
kubectl create -f https://github.com/minio/minio/blob/master/docs/orchestration/kubernetes-yaml/minio-gcs-gateway-service.yaml?raw=true
|
||
service "minio-service" created
|
||
```
|
||
|
||
The `LoadBalancer` service takes couple of minutes to launch. To check if the service was created successfully, run the command
|
||
|
||
```sh
|
||
kubectl get svc minio-service
|
||
NAME CLUSTER-IP EXTERNAL-IP PORT(S) AGE
|
||
minio-service 10.55.248.23 104.199.249.165 9000:31852/TCP 1m
|
||
```
|
||
|
||
### Update Existing Minio GCS Deployment
|
||
|
||
You can update an existing Minio deployment to use a newer Minio release. To do this, use the `kubectl set image` command:
|
||
|
||
```sh
|
||
kubectl set image deployment/minio-deployment minio=<replace-with-new-minio-image>
|
||
```
|
||
|
||
Kubernetes will restart the deployment to update the image. You will get a message as shown below, on successful update:
|
||
|
||
```
|
||
deployment "minio-deployment" image updated
|
||
```
|
||
|
||
### GCS Gateway Resource Cleanup
|
||
|
||
You can cleanup the cluster using
|
||
|
||
```sh
|
||
kubectl delete deployment minio-deployment \
|
||
&& kubectl delete secret gcs-credentials
|
||
``` |