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Upgrade MinIO Operator

You can upgrade the MinIO Operator at any time without impacting your managed MinIO Tenants.

As part of the upgrade process, the Operator may update and restart Tenants to support changes to the MinIO Custom Resource Definition (CRD). These changes require no action on the part of any operator or administrator, and do not impact Tenant operations.

The following table lists the upgrade paths from previous versions of the MinIO Operator:

Current Version

Supported Upgrade Target

4.2.3 and Later

4.5.8

4.0.0 through 4.2.2

4.2.3

3.X.X

4.2.2

Upgrade MinIO Operator 4.2.3 and Later to 4.5.8

Prerequisites

This procedure requires the following:

  • You have an existing MinIO Operator deployment running 4.2.3 or later

  • Your Kubernetes cluster runs 1.19.0 or later

  • Your local host has kubectl installed and configured with access to the Kubernetes cluster

This procedure upgrades the MinIO Operator from any 4.2.3 or later release to 4.5.8.

  1. (Optional) Update each MinIO Tenant to the latest stable MinIO Version.

    Upgrading MinIO regularly ensures your Tenants have the latest features and performance improvements.

    Test upgrades in a lower environment such as a Dev or QA Tenant, before applying to your production Tenants.

    See Upgrade a MinIO Tenant for a procedure on upgrading MinIO Tenants.

  2. Verify the existing Operator installation.

    Use kubectl get all -n minio-operator to verify the health and status of all Operator pods and services.

    If you installed the Operator to a custom namespace, specify that namespace as -n <NAMESPACE>.

    You can verify the currently installed Operator version by retrieving the object specification for an operator pod in the namespace. The following example uses the jq tool to filter the necessary information from kubectl:

    kubectl get pod -l 'name=minio-operator' -n minio-operator -o json | jq '.items[0].spec.containers'
    

    The output resembles the following:

    {
       "env": [
          {
             "name": "CLUSTER_DOMAIN",
             "value": "cluster.local"
          }
       ],
       "image": "minio/operator:v4.5.1",
       "imagePullPolicy": "IfNotPresent",
       "name": "minio-operator"
    }
    
  3. Download the Latest Stable Version of the MinIO Kubernetes Plugin

    You can install the MinIO plugin using either the Kubernetes Krew plugin manager or manually by downloading and installing the plugin binary to your local host:

    Krew is a kubectl plugin manager developed by the Kubernetes SIG CLI group. See the krew installation documentation for specific instructions. You can use the Krew plugin for Linux, MacOS, and Windows operating systems.

    You can use Krew to install the MinIO kubectl plugin using the following commands:

    kubectl krew update
    kubectl krew install minio
    

    If you want to update the MinIO plugin with Krew, use the following command:

    kubectl krew upgrade minio
    

    You can validate the installation of the MinIO plugin using the following command:

    kubectl minio version
    

    The output should match 4.5.8.

    You can download the MinIO kubectl plugin to your local system path. The kubectl CLI automatically discovers and runs compatible plugins.

    The following code downloads the latest stable version 4.5.8 of the MinIO Kubernetes plugin and installs it to the system path:

    curl https://github.com/minio/operator/releases/download/v4.5.8/kubectl-minio_4.5.8_linux_amd64 -o kubectl-minio
    chmod +x kubectl-minio
    mv kubectl-minio /usr/local/bin/
    

    The mv command above may require sudo escalation depending on the permissions of the authenticated user.

    Run the following command to verify installation of the plugin:

    kubectl minio version
    

    The output should display the Operator version as 4.5.8.

    You can download the MinIO kubectl plugin to your local system path. The kubectl CLI automatically discovers and runs compatible plugins.

    The following PowerShell command downloads the latest stable version 4.5.8 of the MinIO Kubernetes plugin and installs it to the system path:

    Invoke-WebRequest -Uri "https://github.com/minio/operator/releases/download/v4.5.8/kubectl-minio_4.5.8_windows_amd64.exe" -OutFile "C:\kubectl-plugins\kubectl-minio.exe"
    

    Ensure the path to the plugin folder is included in the Windows PATH.

    Run the following command to verify installation of the plugin:

    kubectl minio version
    

    The output should display the Operator version as 4.5.8.

  4. Run the initialization command to upgrade the Operator

    Use the kubectl minio init command to upgrade the existing MinIO Operator installation

    kubectl minio init
    
  5. Validate the Operator upgrade

    You can check the Operator version by reviewing the object specification for an Operator Pod using a previous step.

    Use kubectl minio proxy to access the Operator Console and confirm the status of managed Tenants:

    kubectl minio proxy
    

Upgrade MinIO Operator 4.0.0 through 4.2.2 to 4.2.3

Prerequisites

This procedure assumes that:

  • You have an existing MinIO Operator deployment running any release from 4.0.0 through 4.2.2

  • Your Kubernetes cluster runs 1.19.0 or later

  • Your local host has kubectl installed and configured with access to the Kubernetes cluster

This procedure covers the necessary steps to upgrade a MinIO Operator deployment running any release from 4.0.0 through 4.2.2 to 4.2.3. You can then perform Upgrade MinIO Operator 4.2.3 and Later to 4.5.8 to complete the upgrade to 4.5.8.

There is no direct upgrade path for 4.0.0 - 4.2.2 installations to 4.5.8.

  1. (Optional) Update each MinIO Tenant to the latest stable MinIO Version.

    Upgrading MinIO regularly ensures your Tenants have the latest features and performance improvements.

    Test upgrades in a lower environment such as a Dev or QA Tenant, before applying to your production Tenants.

    See Upgrade a MinIO Tenant for a procedure on upgrading MinIO Tenants.

  2. Check the Security Context for each Tenant Pool

    Use the following command to validate the specification for each managed MinIO Tenant:

    kubectl get tenants <TENANT-NAME> -n <TENANT-NAMESPACE> -o yaml
    

    If the spec.pools.securityContext field does not exist for a Tenant, the tenant pods likely run as root.

    As part of the 4.2.3 and later series, pods run with a limited permission set enforced as part of the Operator upgrade. However, Tenants running pods as root may fail to start due to the security context mismatch. You can set an explicit Security Context that allows pods to run as root for those Tenants:

    securityContext:
      runAsUser: 0
      runAsGroup: 0
      runAsNonRoot: false
      fsGroup: 0
    

    You can use the following command to edit the tenant and apply the changes:

    kubectl edit tenants <TENANT-NAME> -n <TENANT-NAMESPACE>
    # Modify the securityContext as needed
    

    See Pod Security Standards for more information on Kubernetes Security Contexts.

  3. Upgrade to Operator 4.2.3

    Download the MinIO Kubernetes Plugin 4.2.3 and use it to upgrade the Operator. Open https://github.com/minio/operator/releases/tag/v4.2.3 in a browser and download the binary that corresponds to your local host OS. For example, Linux hosts running an Intel or AMD processor can run the following commands:

    wget https://github.com/minio/operator/releases/download/v4.2.3/kubectl-minio_4.2.3_linux_amd64 -o kubectl-minio_4.2.3
    chmod +x kubectl-minio_4.2.3
    
    ./kubectl-minio_4.2.3 init
    
  4. Validate all Tenants and Operator pods

    Check the Operator and MinIO Tenant namespaces to ensure all pods and services started successfully.

    For example:

    kubectl get all -n minio-operator
    
    kubectl get pods -l "v1.min.io/tenant" --all-namespaces
    
  5. Upgrade to 4.5.8

    Follow the Upgrade MinIO Operator 4.2.3 and Later to 4.5.8 procedure to upgrade to the latest stable Operator version.

Upgrade MinIO Operator 3.0.0 through 3.0.29 to 4.2.2

Prerequisites

This procedure assumes that:

  • You have an existing MinIO Operator deployment running 3.X.X

  • Your Kubernetes cluster runs 1.19.0 or later

  • Your local host has kubectl installed and configured with access to the Kubernetes cluster

This procedure covers the necessary steps to upgrade a MinIO Operator deployment running any release from 3.0.0 through 3.2.9 to 4.2.2. You can then perform Upgrade MinIO Operator 4.0.0 through 4.2.2 to 4.2.3, followed by Upgrade MinIO Operator 4.2.3 and Later to 4.5.8.

There is no direct upgrade path from a 3.X.X series installation to 4.5.8.

  1. (Optional) Update each MinIO Tenant to the latest stable MinIO Version.

    Upgrading MinIO regularly ensures your Tenants have the latest features and performance improvements.

    Test upgrades in a lower environment such as a Dev or QA Tenant, before applying to your production Tenants.

    See Upgrade a MinIO Tenant for a procedure on upgrading MinIO Tenants.

  2. Validate the Tenant tenant.spec.zones values

    Use the following command to validate the specification for each managed MinIO Tenant:

    kubectl get tenants <TENANT-NAME> -n <TENANT-NAMESPACE> -o yaml
    
    • Ensure each tenant.spec.zones element has a name field set to the name for that zone. Each zone must have a unique name for that Tenant, such as zone-0 and zone-1 for the first and second zones respectively.

    • Ensure each tenant.spec.zones has an explicit securityContext describing the permission set with which pods run in the cluster.

    The following example tenant YAML fragment sets the specified fields:

    image: "minio/minio:$(LATEST-VERSION)"
    ...
    zones:
    - servers: 4
      name: "zone-0"
      volumesPerServer: 4
      volumeClaimTemplate:
         metadata:
         name: data
         spec:
         accessModes:
            - ReadWriteOnce
         resources:
            requests:
               storage: 1Ti
      securityContext:
         runAsUser: 0
         runAsGroup: 0
         runAsNonRoot: false
         fsGroup: 0
    - servers: 4
      name: "zone-1"
      volumesPerServer: 4
      volumeClaimTemplate:
         metadata:
         name: data
         spec:
         accessModes:
            - ReadWriteOnce
         resources:
            requests:
               storage: 1Ti
      securityContext:
         runAsUser: 0
         runAsGroup: 0
         runAsNonRoot: false
         fsGroup: 0
    

    You can use the following command to edit the tenant and apply the changes:

    kubectl edit tenants <TENANT-NAME> -n <TENANT-NAMESPACE>
    
  3. Upgrade to Operator 4.2.2

    Download the MinIO Kubernetes Plugin 4.2.2 and use it to upgrade the Operator. Open https://github.com/minio/operator/releases/tag/v4.2.2 in a browser and download the binary that corresponds to your local host OS. For example, Linux hosts running an Intel or AMD processor can run the following commands:

    wget https://github.com/minio/operator/releases/download/v4.2.3/kubectl-minio_4.2.2_linux_amd64 -o kubectl-minio_4.2.2
    chmod +x kubectl-minio_4.2.2
    
    ./kubectl-minio_4.2.2 init
    
  4. Validate all Tenants and Operator pods

    Check the Operator and MinIO Tenant namespaces to ensure all pods and services started successfully.

    For example:

    kubectl get all -n minio-operator
    
    kubectl get pods -l "v1.min.io/tenant" --all-namespaces
    
  5. Upgrade to 4.2.3

    Follow the Upgrade MinIO Operator 4.0.0 through 4.2.2 to 4.2.3 procedure to upgrade to Operator 4.2.3. You can then upgrade to 4.5.8.