You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
194 lines
8.5 KiB
194 lines
8.5 KiB
# How to monitor MinIO server with Prometheus [](https://slack.min.io)
|
|
|
|
[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.
|
|
|
|
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.
|
|
|
|
This document explains how to setup Prometheus and configure it to scrape data from MinIO servers.
|
|
|
|
**Table of Contents**
|
|
|
|
- [Prerequisites](#prerequisites)
|
|
- [1. Download Prometheus](#1-download-prometheus)
|
|
- [2. Configure authentication type for Prometheus metrics](#2-configure-authentication-type-for-prometheus-metrics)
|
|
- [3. Configuring Prometheus](#3-configuring-prometheus)
|
|
- [3.1 Authenticated Prometheus config](#31-authenticated-prometheus-config)
|
|
- [3.2 Public Prometheus config](#32-public-prometheus-config)
|
|
- [4. Update `scrape_configs` section in prometheus.yml](#4-update-scrapeconfigs-section-in-prometheusyml)
|
|
- [5. Start Prometheus](#5-start-prometheus)
|
|
- [List of metrics exposed by MinIO](#list-of-metrics-exposed-by-minio)
|
|
|
|
## Prerequisites
|
|
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.
|
|
|
|
### 1. Download Prometheus
|
|
|
|
[Download the latest release](https://prometheus.io/download) of Prometheus for your platform, then extract it
|
|
|
|
```sh
|
|
tar xvfz prometheus-*.tar.gz
|
|
cd prometheus-*
|
|
```
|
|
|
|
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
|
|
|
|
```sh
|
|
./prometheus --help
|
|
usage: prometheus [<flags>]
|
|
|
|
The Prometheus monitoring server
|
|
|
|
. . .
|
|
|
|
```
|
|
|
|
Refer [Prometheus documentation](https://prometheus.io/docs/introduction/first_steps/) for more details.
|
|
|
|
### 2. Configure authentication type for Prometheus metrics
|
|
|
|
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.
|
|
|
|
```
|
|
export MINIO_PROMETHEUS_AUTH_TYPE="public"
|
|
minio server ~/test
|
|
```
|
|
|
|
### 3. Configuring Prometheus
|
|
|
|
#### 3.1 Authenticated Prometheus config
|
|
|
|
> 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.
|
|
|
|
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>`.
|
|
|
|
The command will generate the `scrape_configs` section of the prometheus.yml as follows:
|
|
|
|
```yaml
|
|
scrape_configs:
|
|
- job_name: minio-job
|
|
bearer_token: <secret>
|
|
metrics_path: /minio/prometheus/metrics
|
|
scheme: http
|
|
static_configs:
|
|
- targets: ['localhost:9000']
|
|
```
|
|
|
|
#### 3.2 Public Prometheus config
|
|
|
|
If Prometheus endpoint authentication type is set to `public`. Following prometheus config is sufficient to start scraping metrics data from MinIO.
|
|
|
|
```yaml
|
|
scrape_configs:
|
|
- job_name: minio-job
|
|
metrics_path: /minio/prometheus/metrics
|
|
scheme: http
|
|
static_configs:
|
|
- targets: ['localhost:9000']
|
|
```
|
|
|
|
### 4. Update `scrape_configs` section in prometheus.yml
|
|
|
|
To authorize every scrape request, copy and paste the generated `scrape_configs` section in the prometheus.yml and restart the Prometheus service.
|
|
|
|
### 5. Start Prometheus
|
|
|
|
Start (or) Restart Prometheus service by running
|
|
|
|
```sh
|
|
./prometheus --config.file=prometheus.yml
|
|
```
|
|
|
|
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`.
|
|
|
|
## List of metrics exposed by MinIO
|
|
|
|
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
|
|
|
|
These are the new set of metrics which will be in effect after `RELEASE.2019-10-16*`. Some of the key changes in this update are listed below.
|
|
- Metrics are bound the respective nodes and is not cluster-wide. Each and every node in a cluster will expose its own metrics.
|
|
- Additional metrics to cover the s3 and internode traffic statistics were added.
|
|
- Metrics that records the http statistics and latencies are labeled to their respective APIs (putobject,getobject etc).
|
|
- Disk usage metrics are distributed and labeled to the respective disk paths.
|
|
|
|
For more details, please check the `Migration guide for the new set of metrics`
|
|
|
|
The list of metrics and its definition are as follows. (NOTE: instance here is one MinIO node)
|
|
|
|
> NOTES:
|
|
> 1. Instance here is one MinIO node.
|
|
> 2. `s3 requests` exclude internode requests.
|
|
|
|
- standard go runtime metrics prefixed by `go_`
|
|
- process level metrics prefixed with `process_`
|
|
- prometheus scrap metrics prefixed with `promhttp_`
|
|
|
|
- `disk_storage_used` : Disk space used by the disk.
|
|
- `disk_storage_available`: Available disk space left on the disk.
|
|
- `disk_storage_total`: Total disk space on the disk.
|
|
- `disks_offline`: Total number of offline disks in current MinIO instance.
|
|
- `disks_total`: Total number of disks in current MinIO instance.
|
|
- `s3_requests_total`: Total number of s3 requests in current MinIO instance.
|
|
- `s3_errors_total`: Total number of errors in s3 requests in current MinIO instance.
|
|
- `s3_requests_current`: Total number of active s3 requests in current MinIO instance.
|
|
- `internode_rx_bytes_total`: Total number of internode bytes received by current MinIO server instance.
|
|
- `internode_tx_bytes_total`: Total number of bytes sent to the other nodes by current MinIO server instance.
|
|
- `s3_rx_bytes_total`: Total number of s3 bytes received by current MinIO server instance.
|
|
- `s3_tx_bytes_total`: Total number of s3 bytes sent by current MinIO server instance.
|
|
- `minio_version_info`: Current MinIO version with commit-id.
|
|
- `s3_ttfb_seconds`: Histogram that holds the latency information of the requests.
|
|
|
|
Apart from above metrics, MinIO also exposes below mode specific metrics
|
|
|
|
### Cache specific metrics
|
|
|
|
MinIO Gateway instances enabled with Disk-Caching expose caching related metrics.
|
|
|
|
- `cache_data_served`: Total number of bytes served from cache.
|
|
- `cache_hits_total`: Total number of cache hits.
|
|
- `cache_misses_total`: Total number of cache misses.
|
|
|
|
### S3 Gateway & Cache specific metrics
|
|
|
|
MinIO S3 Gateway instance exposes metrics related to Gateway communication with AWS S3.
|
|
|
|
- `gateway_s3_requests`: Total number of GET & HEAD requests made to AWS S3. This metrics has a label `method` that identifies GET & HEAD Requests.
|
|
- `gateway_s3_bytes_sent`: Total number of bytes sent to AWS S3 (in GET & HEAD Requests).
|
|
- `gateway_s3_bytes_received`: Total number of bytes received from AWS S3 (in GET & HEAD Requests).
|
|
|
|
## Migration guide for the new set of metrics
|
|
|
|
This migration guide applies for older releases or any releases before `RELEASE.2019-10-23*`
|
|
|
|
### MinIO disk level metrics - `disk_*`
|
|
|
|
The migrations include
|
|
|
|
- `minio_total_disks` to `disks_total`
|
|
- `minio_offline_disks` to `disks_offline`
|
|
|
|
### MinIO disk level metrics - `disk_storage_*`
|
|
|
|
These metrics have one label.
|
|
|
|
- `disk`: Holds the disk path
|
|
|
|
The migrations include
|
|
|
|
- `minio_disk_storage_used_bytes` to `disk_storage_used`
|
|
- `minio_disk_storage_available_bytes` to `disk_storage_available`
|
|
- `minio_disk_storage_total_bytes` to `disk_storage_total`
|
|
|
|
### MinIO network level metrics
|
|
|
|
These metrics are detailed to cover the s3 and internode network statistics.
|
|
|
|
The migrations include
|
|
|
|
- `minio_network_sent_bytes_total` to `s3_tx_bytes_total` and `internode_tx_bytes_total`
|
|
- `minio_network_received_bytes_total` to `s3_rx_bytes_total` and `internode_rx_bytes_total`
|
|
|
|
Some of the additional metrics added were
|
|
|
|
- `s3_requests_total`
|
|
- `s3_errors_total`
|
|
- `s3_ttfb_seconds`
|
|
|