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minio/docs/logging/README.md

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MinIO Logging Quickstart Guide Slack

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 is on always and cannot be disabled.

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/ logger_webhook
logger_webhook:name1 auth_token="" endpoint=""

mc admin config set myminio logger_webhook:name1 auth_token="" endpoint="http://endpoint:port/path"
mc admin service restart myminio

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

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

export MINIO_LOGGER_WEBHOOK_ENABLE_target1="on"
export MINIO_LOGGER_WEBHOOK_AUTH_TOKEN_target1="token"
export MINIO_LOGGER_WEBHOOK_ENDPOINT_target1=http://localhost:8080/minio/logs
minio server /mnt/data

Audit Targets

Assuming mc is already configured

HTTP Target

mc admin config get myminio/ audit_webhook
audit_webhook:name1 enable=off endpoint= auth_token= client_cert= client_key=

mc admin config set myminio audit_webhook:name1 auth_token="" endpoint="http://endpoint:port/path"
mc admin service restart myminio

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

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

export MINIO_AUDIT_WEBHOOK_ENABLE_target1="on"
export MINIO_AUDIT_WEBHOOK_AUTH_TOKEN_target1="token"
export MINIO_AUDIT_WEBHOOK_ENDPOINT_target1=http://localhost:8080/minio/logs
export MINIO_AUDIT_WEBHOOK_CLIENT_CERT="/tmp/cert.pem"
export MINIO_AUDIT_WEBHOOK_CLIENT_KEY=="/tmp/key.pem"
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.

NOTE:

  • timeToFirstByte and timeToResponse will be expressed in Nanoseconds.
  • Additionally in the case of the erasure coded setup tags.objectErasureMap provides per object details about
    • Pool number the object operation was performed on.
    • Set number the object operation was performed on.
    • The list of disks participating in this operation belong to the set.
{
  "version": "1",
  "deploymentid": "51bcc7b9-a447-4251-a940-d9d0aab9af69",
  "time": "2021-10-08T00:46:36.801714978Z",
  "trigger": "incoming",
  "api": {
    "name": "PutObject",
    "bucket": "testbucket",
    "object": "hosts",
    "status": "OK",
    "statusCode": 200,
    "rx": 380,
    "tx": 476,
    "timeToResponse": "257694819ns"
  },
  "remotehost": "127.0.0.1",
  "requestID": "16ABE7A785E7AC2C",
  "userAgent": "MinIO (linux; amd64) minio-go/v7.0.15 mc/DEVELOPMENT.2021-10-06T23-39-34Z",
  "requestHeader": {
    "Authorization": "AWS4-HMAC-SHA256 Credential=minio/20211008/us-east-1/s3/aws4_request,SignedHeaders=host;x-amz-content-sha256;x-amz-date;x-amz-decoded-content-length,Signature=4c60a59e5eb3b0a68693c7fee9dbb5a8a509e0717668669194d37bf182fde031",
    "Content-Length": "380",
    "Content-Type": "application/octet-stream",
    "User-Agent": "MinIO (linux; amd64) minio-go/v7.0.15 mc/DEVELOPMENT.2021-10-06T23-39-34Z",
    "X-Amz-Content-Sha256": "STREAMING-AWS4-HMAC-SHA256-PAYLOAD",
    "X-Amz-Date": "20211008T004636Z",
    "X-Amz-Decoded-Content-Length": "207",
    "X-Amz-Server-Side-Encryption": "aws:kms"
  },
  "responseHeader": {
    "Accept-Ranges": "bytes",
    "Content-Length": "0",
    "Content-Security-Policy": "block-all-mixed-content",
    "ETag": "4939450d1beec11e10a91ee7700bb593",
    "Server": "MinIO",
    "Strict-Transport-Security": "max-age=31536000; includeSubDomains",
    "Vary": "Origin,Accept-Encoding",
    "X-Amz-Request-Id": "16ABE7A785E7AC2C",
    "X-Amz-Server-Side-Encryption": "aws:kms",
    "X-Amz-Server-Side-Encryption-Aws-Kms-Key-Id": "my-minio-key",
    "X-Content-Type-Options": "nosniff",
    "X-Xss-Protection": "1; mode=block",
    "x-amz-version-id": "ac4639f6-c544-4f3f-af1e-b4c0736f67f9"
  },
  "tags": {
    "objectErasureMap": {
      "hosts": {
        "poolId": 1,
        "setId": 1,
        "disks": [
          "/mnt/data1",
          "/mnt/data2",
          "/mnt/data3",
          "/mnt/data4"
        ]
      }
    }
  }
}

Kafka Target

Assuming that you already have Apache Kafka configured and running.

mc admin config set myminio/ audit_kafka
KEY:
audit_kafka[:name]  send audit logs to kafka endpoints

ARGS:
brokers*         (csv)       comma separated list of Kafka broker addresses
topic            (string)    Kafka topic used for bucket notifications
sasl_username    (string)    username for SASL/PLAIN or SASL/SCRAM authentication
sasl_password    (string)    password for SASL/PLAIN or SASL/SCRAM authentication
sasl_mechanism   (string)    sasl authentication mechanism, default 'plain'
tls_client_auth  (string)    clientAuth determines the Kafka server's policy for TLS client auth
sasl             (on|off)    set to 'on' to enable SASL authentication
tls              (on|off)    set to 'on' to enable TLS
tls_skip_verify  (on|off)    trust server TLS without verification, defaults to "on" (verify)
client_tls_cert  (path)      path to client certificate for mTLS auth
client_tls_key   (path)      path to client key for mTLS auth
version          (string)    specify the version of the Kafka cluster
comment          (sentence)  optionally add a comment to this setting

Configure MinIO to send audit logs to locally running Kafka brokers

mc admin config set myminio/ audit_kafka:target1 brokers=localhost:29092 topic=auditlog
mc admin service restart myminio/

On another terminal assuming you have kafkacat installed

kafkacat -b localhost:29092 -t auditlog  -C

{"version":"1","deploymentid":"8a1d8091-b874-45df-b9ea-e044eede6ace","time":"2021-07-13T02:00:47.020547414Z","trigger":"incoming","api":{"name":"ListBuckets","status":"OK","statusCode":200,"timeToFirstByte":"261795ns","timeToResponse":"312490ns"},"remotehost":"127.0.0.1","requestID":"16913736591C237F","userAgent":"MinIO (linux; amd64) minio-go/v7.0.11 mc/DEVELOPMENT.2021-07-09T02-22-26Z","requestHeader":{"Authorization":"AWS4-HMAC-SHA256 Credential=minio/20210713/us-east-1/s3/aws4_request, SignedHeaders=host;x-amz-content-sha256;x-amz-date, Signature=7fe65c5467e05ca21de64094688da43f96f34fec82e8955612827079f4600527","User-Agent":"MinIO (linux; amd64) minio-go/v7.0.11 mc/DEVELOPMENT.2021-07-09T02-22-26Z","X-Amz-Content-Sha256":"e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855","X-Amz-Date":"20210713T020047Z"},"responseHeader":{"Accept-Ranges":"bytes","Content-Length":"547","Content-Security-Policy":"block-all-mixed-content","Content-Type":"application/xml","Server":"MinIO","Vary":"Origin,Accept-Encoding","X-Amz-Request-Id":"16913736591C237F","X-Xss-Protection":"1; mode=block"}}

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

mc admin config set myminio/ audit_kafka --env
KEY:
audit_kafka[:name]  send audit logs to kafka endpoints

ARGS:
MINIO_AUDIT_KAFKA_ENABLE*          (on|off)    enable audit_kafka target, default is 'off'
MINIO_AUDIT_KAFKA_BROKERS*         (csv)       comma separated list of Kafka broker addresses
MINIO_AUDIT_KAFKA_TOPIC            (string)    Kafka topic used for bucket notifications
MINIO_AUDIT_KAFKA_SASL_USERNAME    (string)    username for SASL/PLAIN or SASL/SCRAM authentication
MINIO_AUDIT_KAFKA_SASL_PASSWORD    (string)    password for SASL/PLAIN or SASL/SCRAM authentication
MINIO_AUDIT_KAFKA_SASL_MECHANISM   (string)    sasl authentication mechanism, default 'plain'
MINIO_AUDIT_KAFKA_TLS_CLIENT_AUTH  (string)    clientAuth determines the Kafka server's policy for TLS client auth
MINIO_AUDIT_KAFKA_SASL             (on|off)    set to 'on' to enable SASL authentication
MINIO_AUDIT_KAFKA_TLS              (on|off)    set to 'on' to enable TLS
MINIO_AUDIT_KAFKA_TLS_SKIP_VERIFY  (on|off)    trust server TLS without verification, defaults to "on" (verify)
MINIO_AUDIT_KAFKA_CLIENT_TLS_CERT  (path)      path to client certificate for mTLS auth
MINIO_AUDIT_KAFKA_CLIENT_TLS_KEY   (path)      path to client key for mTLS auth
MINIO_AUDIT_KAFKA_VERSION          (string)    specify the version of the Kafka cluster
MINIO_AUDIT_KAFKA_COMMENT          (sentence)  optionally add a comment to this setting

export MINIO_AUDIT_KAFKA_ENABLE_target1="on"
export MINIO_AUDIT_KAFKA_BROKERS_target1="localhost:29092"
export MINIO_AUDIT_KAFKA_TOPIC_target1="auditlog"
minio server /mnt/data

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

NOTE:

  • timeToFirstByte and timeToResponse will be expressed in Nanoseconds.
  • Additionally in the case of the erasure coded setup tags.objectErasureMap provides per object details about
    • Pool number the object operation was performed on.
    • Set number the object operation was performed on.
    • The list of disks participating in this operation belong to the set.

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