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Monitor a MinIO Tenant

This procedure documents monitoring a MinIO object storage tenant deployed on VCF 4.2.

Monitor MinIO using Prometheus

MinIO exports Prometheus compatible data as an authorized endpoint. Users can monitor MinIO tenants using any Prometheus-compatible application by scraping data from this endpoint.

This procedure assumes an existing Prometheus deployment with access to the MinIO tenant. Documentation for deploying and configuring Prometheus is outside the scope of this documentation.

1) Generate a Bearer Token

The MinIO scrape endpoint requires authentication. Prometheus supports a bearer token approach to authenticate scrape requests. Use the mc admin prometheus generate command to generate the required bearer token. See for instructions on downloading mc.


mc admin prometheus generate <TENANT-NAME>
  • Replace <TENANT-NAME> with the name of the MinIO tenant.

  • Replace <TENANT-URL> with the endpoint for the MinIO tenant.

  • Replace <ACCESS_KEY> and <SECRET_KEY> with the root credentials for the MinIO tenant.

  • Add --insecure if using self signed certificates.

The command returns a bearer token similar to the following:

- job_name: minio-job
  bearer_token: TOKEN
  metrics_path: <PATH>
  scheme: http
  - targets: ['HOSTNAME:9000']

The value of metrics_path depends on the version of mc is used to generate the bearer token:

2) Configure Prometheus for Scraping MinIO

Prometheus uses the scrape_config section of its configuration file to define endpoints for scraping metrics.

  • For existing Prometheus deployments, modify the scrape_config section to include the new job_name element and restart Prometheus.

  • For new Prometheus deployments, ensure the scrape_config section includes the MinIO job_name element before starting Prometheus.

The Prometheus service must have access to the MinIO tenant. For Prometheus servers deployed as part of the VCF Tanzu infrastructure, you need to modify the configuration map used to instantiate each Prometheus pods with the new scrape job.

3) Validate Metric Collection

Prometheus has a built-in expression browser for ad-hoc queries.

Alternatively, you can use any application which supports querying Prometheus, such as Grafana. MinIO publishes a first-party Grafana Dashboard designed to collect all monitoring stats for MinIO tenants.

Monitor MinIO using VMware Skyline Health

MinIO reports the health status of each tenant to VMware Skyline Health.

From the vCenter interface, select the cluster in which you want to deploy the MinIO tenant.

Click the Monitor tab, then open the vSAN section and select Skyline Health.

vCenter Skyline Health Monitoring.

MinIO lists health checks related to each tenant under the MinIO Service section.