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MinIO Logging Quickstart Guide

This document explains how to configure MinIO server to log to different logging targets.

Log Targets

MinIO supports currently two target types

console
http

Console Target

Console target logs to /dev/stderr and is enabled by default. To turn-off console logging you would have to update your MinIO server configuration using mc admin config set command.

Assuming mc is already configured

mc admin config get myminio/ > /tmp/config

Edit the /tmp/config and toggle console field enabled from true to false.

	"logger": {
		"console": {
			"enabled": false
		}
	},

Once changed, now you may set the changed config to server through following commands.

mc admin config set myminio/ < /tmp/config
mc admin restart myminio/

HTTP Target

HTTP target logs to a generic HTTP endpoint in JSON format and is not enabled by default. To enable HTTP target logging you would have to update your MinIO server configuration using mc admin config set command.

Assuming mc is already configured

mc admin config get myminio/ > /tmp/config

Edit the /tmp/config and toggle http field enabled from false to true.

	"logger": {
		"console": {
			"enabled": false
		},
		"http": {
			"1": {
				"enabled": true,
			    "endpoint": "http://endpoint:port/path"
			}
		}
	},

NOTE: http://endpoint:port/path is a placeholder value to indicate the URL format, please change this accordingly as per your configuration.

Once changed, now you may set the changed config to server through following commands.

mc admin config set myminio/ < /tmp/config
mc admin restart myminio/

MinIO also honors environment variable for HTTP target logging as shown below, this setting will override the endpoint settings in the MinIO server config.

MINIO_LOGGER_HTTP_ENDPOINT=http://localhost:8080/minio/logs minio server /mnt/data

Audit Targets

For audit logging MinIO supports only HTTP target type for now. Audit logging is currently only available through environment variable.

MINIO_AUDIT_LOGGER_HTTP_ENDPOINT=http://localhost:8080/minio/logs/audit minio server /mnt/data

Setting this environment variable automatically enables audit logging to the HTTP target. The audit logging is in JSON format as described below.

{
  "version": "1",
  "deploymentid": "bc0e4d1e-bacc-42eb-91ad-2d7f3eacfa8d",
  "time": "2019-08-12T21:34:37.187817748Z",
  "api": {
    "name": "PutObject",
    "bucket": "testbucket",
    "object": "hosts",
    "status": "OK",
    "statusCode": 200,
    "timeToFirstByte": "0s",
    "timeToResponse": "2.143308ms"
  },
  "remotehost": "127.0.0.1",
  "requestID": "15BA4A72C0C70AFC",
  "userAgent": "MinIO (linux; amd64) minio-go/v6.0.32 mc/2019-08-12T18:27:13Z",
  "requestHeader": {
    "Authorization": "AWS4-HMAC-SHA256 Credential=minio/20190812/us-east-1/s3/aws4_request,SignedHeaders=host;x-amz-content-sha256;x-amz-date;x-amz-decoded-content-length,Signature=d3f02a6aeddeb29b06e1773b6a8422112890981269f2463a26f307b60423177c",
    "Content-Length": "686",
    "Content-Type": "application/octet-stream",
    "User-Agent": "MinIO (linux; amd64) minio-go/v6.0.32 mc/2019-08-12T18:27:13Z",
    "X-Amz-Content-Sha256": "STREAMING-AWS4-HMAC-SHA256-PAYLOAD",
    "X-Amz-Date": "20190812T213437Z",
    "X-Amz-Decoded-Content-Length": "512"
  },
  "responseHeader": {
    "Accept-Ranges": "bytes",
    "Content-Length": "0",
    "Content-Security-Policy": "block-all-mixed-content",
    "ETag": "a414c889dc276457bd7175f974332cb0-1",
    "Server": "MinIO/DEVELOPMENT.2019-08-12T21-28-07Z",
    "Vary": "Origin",
    "X-Amz-Request-Id": "15BA4A72C0C70AFC",
    "X-Xss-Protection": "1; mode=block"
  }
}

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