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136 lines
7.1 KiB
136 lines
7.1 KiB
5 years ago
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# How to monitor MinIO server with Prometheus [](https://slack.min.io)
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[Prometheus](https://prometheus.io) is a cloud-native monitoring platform, built originally at SoundCloud. Prometheus offers a multi-dimensional data model with time series data identified by metric name and key/value pairs. The data collection happens via a pull model over HTTP/HTTPS. Targets to pull data from are discovered via service discovery or static configuration.
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MinIO exports Prometheus compatible data by default as an authorized endpoint at `/minio/prometheus/metrics`. Users looking to monitor their MinIO instances can point Prometheus configuration to scrape data from this endpoint.
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This document explains how to setup Prometheus and configure it to scrape data from MinIO servers.
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**Table of Contents**
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- [Prerequisites](#prerequisites)
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- [1. Download Prometheus](#1-download-prometheus)
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- [2. Configure authentication type for Prometheus metrics](#2-configure-authentication-type-for-prometheus-metrics)
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- [3. Configuring Prometheus](#3-configuring-prometheus)
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- [3.1 Authenticated Prometheus config](#31-authenticated-prometheus-config)
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- [3.2 Public Prometheus config](#32-public-prometheus-config)
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- [4. Update `scrape_configs` section in prometheus.yml](#4-update-scrapeconfigs-section-in-prometheusyml)
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- [5. Start Prometheus](#5-start-prometheus)
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- [List of metrics exposed by MinIO](#list-of-metrics-exposed-by-minio)
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## Prerequisites
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To get started with MinIO, refer [MinIO QuickStart Document](https://docs.min.io/docs/minio-quickstart-guide). Follow below steps to get started with MinIO monitoring using Prometheus.
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### 1. Download Prometheus
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[Download the latest release](https://prometheus.io/download) of Prometheus for your platform, then extract it
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```sh
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tar xvfz prometheus-*.tar.gz
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cd prometheus-*
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```
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Prometheus server is a single binary called `prometheus` (or `prometheus.exe` on Microsoft Windows). Run the binary and pass `--help` flag to see available options
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```sh
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./prometheus --help
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usage: prometheus [<flags>]
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The Prometheus monitoring server
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. . .
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```
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Refer [Prometheus documentation](https://prometheus.io/docs/introduction/first_steps/) for more details.
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### 2. Configure authentication type for Prometheus metrics
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MinIO supports two authentication modes for Prometheus either `jwt` or `public`, by default MinIO runs in `jwt` mode. To allow public access without authentication for prometheus metrics set environment as follows.
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```
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export MINIO_PROMETHEUS_AUTH_TYPE="public"
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minio server ~/test
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```
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### 3. Configuring Prometheus
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#### 3.1 Authenticated Prometheus config
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> If MinIO is configured to expose metrics without authentication, you don't need to use `mc` to generate prometheus config. You can skip reading further and move to 3.2 section.
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The Prometheus endpoint in MinIO requires authentication by default. Prometheus supports a bearer token approach to authenticate prometheus scrape requests, override the default Prometheus config with the one generated using mc. To generate a Prometheus config for an alias, use [mc](https://docs.min.io/docs/minio-client-quickstart-guide) as follows `mc admin prometheus generate <alias>`.
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The command will generate the `scrape_configs` section of the prometheus.yml as follows:
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```yaml
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scrape_configs:
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- job_name: minio-job
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bearer_token: <secret>
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metrics_path: /minio/prometheus/metrics
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scheme: http
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static_configs:
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- targets: ['localhost:9000']
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```
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#### 3.2 Public Prometheus config
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If Prometheus endpoint authentication type is set to `public`. Following prometheus config is sufficient to start scraping metrics data from MinIO.
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```yaml
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scrape_configs:
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- job_name: minio-job
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metrics_path: /minio/prometheus/metrics
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scheme: http
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static_configs:
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- targets: ['localhost:9000']
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```
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### 4. Update `scrape_configs` section in prometheus.yml
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To authorize every scrape request, copy and paste the generated `scrape_configs` section in the prometheus.yml and restart the Prometheus service.
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### 5. Start Prometheus
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Start (or) Restart Prometheus service by running
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```sh
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./prometheus --config.file=prometheus.yml
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```
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Here `prometheus.yml` is the name of configuration file. You can now see MinIO metrics in Prometheus dashboard. By default Prometheus dashboard is accessible at `http://localhost:9090`.
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## List of metrics exposed by MinIO
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MinIO server exposes the following metrics on `/minio/prometheus/metrics` endpoint. All of these can be accessed via Prometheus dashboard. The full list of exposed metrics along with their definition is available in the demo server at https://play.min.io:9000/minio/prometheus/metrics
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- standard go runtime metrics prefixed by `go_`
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- process level metrics prefixed with `process_`
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- prometheus scrap metrics prefixed with `promhttp_`
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- `minio_disk_storage_used_bytes` : Total byte count of disk storage used by current MinIO server instance
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- `minio_http_requests_duration_seconds_bucket` : Cumulative counters for all the request types (HEAD/GET/PUT/POST/DELETE) in different time brackets
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- `minio_http_requests_duration_seconds_count` : Count of current number of observations i.e. total HTTP requests (HEAD/GET/PUT/POST/DELETE)
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- `minio_http_requests_duration_seconds_sum` : Current aggregate time spent servicing all HTTP requests (HEAD/GET/PUT/POST/DELETE) in seconds
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- `minio_network_received_bytes_total` : Total number of bytes received by current MinIO server instance
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- `minio_network_sent_bytes_total` : Total number of bytes sent by current MinIO server instance
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- `minio_offline_disks` : Total number of offline disks for current MinIO server instance
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- `minio_total_disks` : Total number of disks for current MinIO server instance
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- `minio_disk_storage_available_bytes` : Current storage space available to MinIO server in bytes
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- `minio_disk_storage_total_bytes` : Total storage space available to MinIO server in bytes
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- `process_start_time_seconds` : Start time of MinIO server since unix epoc hin seconds
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If you're running MinIO gateway, disk/storage information is not exposed. Only following metrics are available
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- `minio_http_requests_duration_seconds_bucket` : Cumulative counters for all the request types (HEAD/GET/PUT/POST/DELETE) in different time brackets
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- `minio_http_requests_duration_seconds_count` : Count of current number of observations i.e. total HTTP requests (HEAD/GET/PUT/POST/DELETE)
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- `minio_http_requests_duration_seconds_sum` : Current aggregate time spent servicing all HTTP requests (HEAD/GET/PUT/POST/DELETE) in seconds
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- `minio_network_received_bytes_total` : Total number of bytes received by current MinIO server instance
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- `minio_network_sent_bytes_total` : Total number of bytes sent by current MinIO server instance
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- `process_start_time_seconds` : Start time of MinIO server since unix epoch in seconds
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For MinIO instances with [`caching`](https://github.com/minio/minio/tree/master/docs/disk-caching) enabled, these additional metrics are available.
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- `minio_disk_cache_storage_bytes` : Total byte count of cache capacity available for current MinIO server instance
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- `minio_disk_cache_storage_free_bytes` : Total byte count of free cache available for current MinIO server instance
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