Bucket Notifications Settings

• 1: AMQP Notification Settings
• 2: Elasticsearch Notification Settings
• 3: Kafka Notification Settings
• 4: MQTT Notification Settings
• 5: MySQL Notification Settings
• 6: NATS Notification Settings
• 7: NSQ Notification Settings
• 8: PostgreSQL Notification Settings
• 9: Redis Notification Settings
• 10: Webhook Service Notification Settings

1 - AMQP Notification Settings

This page documents settings for configuring an AMQP service as a target for Bucket Notifications. See Publish Events to AMQP (RabbitMQ) for a tutorial on using these settings.

You can establish or modify settings by defining:

• an environment variable on the host system prior to starting or restarting the MinIO Server. Refer to your operating system’s documentation for how to define an environment variable.
• a configuration setting using mc admin config set.

If you define both an environment variable and the similar configuration setting, MinIO uses the environment variable value.

Some settings have only an environment variable or a configuration setting, but not both.

Multiple AMQP Targets

You can specify multiple AMQP service endpoints by appending a unique identifier _ID for each set of related AMQP settings to the top level key.

Examples

For example, the following commands set two distinct AMQP service endpoints as PRIMARY and SECONDARY respectively:

export MINIO_NOTIFY_AMQP_ENABLE_PRIMARY="on"
export MINIO_NOTIFY_AMQP_URL_PRIMARY="amqp://user:password@amqp-endpoint.example.net:5672"

export MINIO_NOTIFY_AMQP_ENABLE_SECONDARY="on"
export MINIO_NOTIFY_AMQP_URL_SECONDARY="amqp://user:password@amqp-endpoint.example.net:5672"

mc admin config set notify_amqp:primary \
   url="user:password@amqp://amqp-endpoint.example.net:5672" [ARGUMENT=VALUE ...]

mc admin config set notify_amqp:secondary \
   url="user:password@amqp://amqp-endpoint.example.net:5672" [ARGUMENT=VALUE ...]

Settings

Enable

mc admin config set notify_amqp \
  url="amqp://user:password@endpoint:port" \
  [ARGUMENT="VALUE"] ...

URL

Required

Specify the AMQP server endpoint to which MinIO publishes bucket events. For example, amqp://myuser:mypassword@localhost:5672.

Exchange

Optional

Specify the name of the AMQP exchange to use.

Exchange Type

Optional

Specify the type of the AMQP exchange.

Routing Key

Optional

Specify the routing key for publishing events.

Mandatory

Optional

Specify off to ignore undelivered messages errors. Defaults to on.

Durable

Optional

Specify on to persist the message queue across broker restarts. Defaults to off.

No Wait

Optional

Specify on to enable non-blocking message delivery. Defaults to off.

Internal

Optional

Specify on to use the exchange only if it is bound to other exchanges. See the RabbitMQ documentation on Exchange to Exchange Bindings for more information on AMQP exchange binding.

Auto Deleted

Optional

Specify on to automatically delete the message queue if there are no consumers. Defaults to off.

Delivery Mode

Optional

Specify 1 for set the delivery mode to non-persistent queue.

Specify 2 to set the delivery mode to persistent queue.

Queue Directory

Optional

Specify the directory path to enable MinIO’s persistent event store for undelivered messages, such as /opt/minio/events.

MinIO stores undelivered events in the specified store while the AMQP service is offline and replays the stored events when connectivity resumes.

Queue Limit

Optional

Specify the maximum limit for undelivered messages. Defaults to 100000.

Comment

Optional

Specify a comment for the AMQP configuration.

2 - Elasticsearch Notification Settings

This page documents settings for configuring an Elasticsearch service as a target for Bucket Notifications. See Publish Events to Elasticsearch for a tutorial on using these settings.

You can establish or modify settings by defining:

• an environment variable on the host system prior to starting or restarting the MinIO Server. Refer to your operating system’s documentation for how to define an environment variable.
• a configuration setting using mc admin config set.

If you define both an environment variable and the similar configuration setting, MinIO uses the environment variable value.

Some settings have only an environment variable or a configuration setting, but not both.

Multiple Elasticsearch Targets

You can specify multiple Elasticsearch service endpoints by appending a unique identifier _ID for each set of related settings. For example, the following commands set two distinct Elasticsearch service endpoints as PRIMARY and SECONDARY, respectively:

Examples

export MINIO_NOTIFY_ELASTICSEARCH_ENABLE_PRIMARY="on"
export MINIO_NOTIFY_ELASTICSEARCH_URL_PRIMARY="https://user:password@elasticsearch-endpoint.example.net:9200"
export MINIO_NOTIFY_ELASTICSEARCH_INDEX_PRIMARY="bucketevents"
export MINIO_NOTIFY_ELASTICSEARCH_FORMAT_PRIMARY="namespace"

export MINIO_NOTIFY_ELASTICSEARCH_ENABLE_SECONDARY="on"
export MINIO_NOTIFY_ELASTICSEARCH_URL_SECONDARY="https://user:password@elasticsearch-endpoint.example.net:9200"
export MINIO_NOTIFY_ELASTICSEARCH_INDEX_SECONDARY="bucketevents"
export MINIO_NOTIFY_ELASTICSEARCH_FORMAT_SECONDARY="namespace"

mc admin config set notify_elasticsearch:primary \
   url="user:password@https://elasticsearch-endpoint.example.net:9200" \
   index="bucketevents" \
   format="namespace" \
   [ARGUMENT=VALUE ...]

mc admin config set notify_elasticsearch:secondary \
   url="user:password@https://elasticsearch-endpoint.example.net:9200" \
   index="bucketevents" \
   format="namespace" \
   [ARGUMENT=VALUE ...]

Settings

Enable

Required

mc admin config set notify_elasticsearch \
  url="https://user:password@elasticsearch.example.com:9200" \
  [ARGUMENT="VALUE"] ... \

URL

Required

Specify the Elasticsearch service endpoint to which MinIO publishes bucket events. For example, https://elasticsearch.example.com:9200.

MinIO supports passing authentication information using as URL parameters using the format PROTOCOL://USERNAME:PASSWORD@HOSTNAME:PORT.

Index

Required

Specify the name of the Elasticsearch index in which to store or update MinIO bucket events. Elasticsearch automatically creates the index if it does not exist.

Format

Required

Specify the format of event data written to the Elasticsearch index. MinIO supports the following values:

namespace

For each bucket event, MinIO creates a JSON document with the bucket and object name from the event as the document ID and the actual event as part of the document body. Additional updates to that object modify the existing index entry for that object. Similarly, deleting the object also deletes the corresponding index entry.

access

For each bucket event, MinIO creates a JSON document with the event details and appends it to the index with an Elasticsearch-generated random ID. Additional updates to an object result in new index entries, and existing entries remain unmodified.

Username

Optional

The username for connecting to an Elasticsearch service endpoint which enforces authentication.

Password

Optional

The password for connecting to an Elasticsearch service endpoint which enforces authentication.

Queue Directory

Optional

Specify the directory path to enable MinIO’s persistent event store for undelivered messages, such as /opt/minio/events.

MinIO stores undelivered events in the specified store while the Elasticsearch service is offline and replays the stored events when connectivity resumes.

Queue Limit

Optional

Specify the maximum limit for undelivered messages. Defaults to 100000.

Comment

Optional

Specify a comment to associate with the Elasticsearch configuration.

3 - Kafka Notification Settings

This page documents settings for configuring an Kafka service as a target for Bucket Notifications. See Publish Events to Kafka for a tutorial on using these settings.

You can establish or modify settings by defining:

• an environment variable on the host system prior to starting or restarting the MinIO Server. Refer to your operating system’s documentation for how to define an environment variable.
• a configuration setting using mc admin config set.

If you define both an environment variable and the similar configuration setting, MinIO uses the environment variable value.

Some settings have only an environment variable or a configuration setting, but not both.

Multiple Kafka Targets

You can specify multiple Kafka service endpoints by appending a unique identifier _ID for each set of related Kafka settings on to the top level key.

Examples

For example, the following commands set two distinct Kafka service endpoints as PRIMARY and SECONDARY respectively:

export MINIO_NOTIFY_KAFKA_ENABLE_PRIMARY="on"
export MINIO_NOTIFY_KAFKA_BROKERS_PRIMARY="https://kafka1.example.net:9200, https://kafka2.example.net:9200"

export MINIO_NOTIFY_KAFKA_ENABLE_SECONDARY="on"
export MINIO_NOTIFY_KAFKA_BROKERS_SECONDARY="https://kafka1.example.net:9200, https://kafka2.example.net:9200"

mc admin config set notify_kafka:primary \
   brokers="https://kafka1.example.net:9200, https://kafka2.example.net:9200"
   [ARGUMENT=VALUE ...]

mc admin config set notify_kafka:secondary \
   brokers="https://kafka1.example.net:9200, https://kafka2.example.net:9200"
   [ARGUMENT=VALUE ...]

Settings

Enable

Required

mc admin config set notify_kafka \
  brokers="https://kafka1.example.net:9200, https://kafka2.example.net:9200"
  [ARGUMENT="VALUE"] ... \

Brokers

Required

Specify a comma-separated list of Kafka broker addresses. For example:

"kafka1.example.com:2021,kafka2.example.com:2021"

Topic

Optional

Specify the name of the Kafka topic to which MinIO publishes bucket events.

SASL

Optional

Specify on to enable SASL authentication.

SASL Username

Optional

Specify the username for performing SASL/PLAIN or SASL/SCRAM authentication to the Kafka broker(s).

SASL Password

Optional

Specify the password for performing SASL/PLAIN or SASL/SCRAM authentication to the Kafka broker(s).

SASL Mechanism

Optional

Specify the SASL mechanism to use for authenticating to the Kafka broker(s). MinIO supports the following mechanisms:

• PLAIN (Default)
• SHA256
• SHA512

TLS Client Auth

Optional

Specify the client authentication type of the Kafka broker(s). The following table lists the supported values and their mappings

See ClientAuthType for more information on each client auth type.

TLS

Optional

Specify on to enable TLS connectivity to the Kafka broker(s).

TLS Skip Verify

Optional

Enables or disables TLS verification of the NATS service endpoint TLS certificates.

• Specify on to disable TLS verification (Default).
• Specify off to enable TLS verification.

Client TLS Cert

Optional

Specify the path to the client certificate to use for performing mTLS authentication to the Kafka broker(s).

Client TLS Key

Optional

Specify the path to the client private key to use for performing mTLS authentication to the Kafka broker(s).

Version

Optional

Specify the version of the Kafka cluster to assume when performing operations against that cluster. See the sarama reference documentation for more information on this field’s behavior.

Batch Size

Optional

Specify the integer value to use as the batch size for sending records to Kafka.

Queue Directory

Optional

Specify the directory path to enable MinIO’s persistent event store for undelivered messages, such as /opt/minio/events.

MinIO stores undelivered events in the specified store while the Kafka server/broker is offline and replays the stored events when connectivity resumes.

Queue Limit

Optional

Specify the maximum limit for undelivered messages. Defaults to 100000.

Comment

Optional

Specify a comment to associate with the Kafka configuration.

Compression Codec

Optional

Specify the compression codec to use when sending records to Kafka.

Supports the following values:

• none
• snappy
• gzip
• lz4
• zstd

Compression Level

Optional

Controls the level of compression applied based on the configured compression codec.

Specify an integer value greater than or equal to 0. The effect of the value depends on the selected codec.

4 - MQTT Notification Settings

This page documents settings for configuring an MQTT service as a target for Bucket Notifications. See Publish Events to MQTT for a tutorial on using these settings.

You can establish or modify settings by defining:

• an environment variable on the host system prior to starting or restarting the MinIO Server. Refer to your operating system’s documentation for how to define an environment variable.
• a configuration setting using mc admin config set.

If you define both an environment variable and the similar configuration setting, MinIO uses the environment variable value.

Some settings have only an environment variable or a configuration setting, but not both.

Multiple MQTT Targets

You can specify multiple MQTT service endpoints by appending a unique identifier _ID for each set of related MQTT settings to the top level key. For example, the following commands set two distinct MQTT service endpoints as PRIMARY and SECONDARY, respectively:

export MINIO_NOTIFY_MQTT_ENABLE_PRIMARY="on"
export MINIO_NOTIFY_MQTT_BROKER_PRIMARY="tcp://user:password@mqtt-endpoint.example.net:1883"

export MINIO_NOTIFY_MQTT_ENABLE_SECONDARY="on"
export MINIO_NOTIFY_MQTT_BROKER_SECONDARY="tcp://user:password@mqtt-endpoint.example.net:1883"

mc admin config set notify_mqtt:primary \
   broker="tcp://endpoint:port" \
   topic="minio/bucket-name/events/" \
   username="username" \
   password="password" \
   [ARGUMENT="VALUE"] ... \

mc admin config set notify_mqtt:secondary \
   broker="tcp://endpoint:port" \
   topic="minio/bucket-name/events/" \
   username="username" \
   password="password" \
   [ARGUMENT="VALUE"] ... \

With these settings, MINIO_NOTIFY_MQTT_ENABLE_PRIMARY indicates the environment variable is associated to an MQTT service endpoint with an ID of PRIMARY.

Settings

Enable

Required

mc admin config set notify_mqtt \
   broker="tcp://endpoint:port" \
   topic="minio/bucket-name/events/" \
   username="username" \
   password="password" \
   [ARGUMENT="VALUE"] ... \

Broker

Required

Specify the MQTT server/broker endpoint. MinIO supports TCP, TLS, or Websocket connections to the server/broker URL. For example:

• tcp://mqtt.example.net:1883
• tls://mqtt.example.net:1883
• ws://mqtt.example.net:1883

Topic

Required

Specify the name of the MQTT topic to associate with events published by MinIO to the MQTT endpoint.

Username

Required if the MQTT server/broker enforces authentication/authorization

Specify the MQTT username MinIO should use to authenticate to the MQTT server/broker.

Password

Required if the MQTT server/broker enforces authentication/authorization

Specify the password for the MQTT username MinIO uses to authenticate to the MQTT server/broker.

Quality of Service

Optional

Specify the Quality of Service priority for the published events.

Defaults to 0.

Keep Alive Interval

Optional

Specify the keep-alive interval for the MQTT connections. MinIO supports the following units of time measurement:

• s - seconds, “60s”
• m - minutes, “60m”
• h - hours, “24h”
• d - days, “7d”

Reconnect Interval

Optional

Specify the reconnect interval for the MQTT connections. MinIO supports the following units of time measurement:

• s - seconds, “60s”
• m - minutes, “60m”
• h - hours, “24h”
• d - days, “7d”

Queue Directory

Optional

Specify the directory path to enable MinIO’s persistent event store for undelivered messages, such as /opt/minio/events.

MinIO stores undelivered events in the specified store while the MQTT server/broker is offline and replays the stored events when connectivity resumes.

Queue Limit

Optional

Specify the maximum limit for undelivered messages. Defaults to 100000.

Comment

Optional

Specify a comment to associate with the MQTT configuration.

5 - MySQL Notification Settings

This page documents settings for configuring a MYSQL service as a target for Bucket Notifications. See Publish Events to MySQL for a tutorial on using these settings.

You can establish or modify settings by defining:

• an environment variable on the host system prior to starting or restarting the MinIO Server. Refer to your operating system’s documentation for how to define an environment variable.
• a configuration setting using mc admin config set.

If you define both an environment variable and the similar configuration setting, MinIO uses the environment variable value.

Some settings have only an environment variable or a configuration setting, but not both.

Multiple MYSQL Targets

You can specify multiple MySQL service endpoints by appending a unique identifier _ID for each set of related MySQL settings on to the top level key.

Examples

The following commands set two distinct MySQL service endpoints as PRIMARY and SECONDARY respectively:

export MINIO_NOTIFY_MYSQL_ENABLE_PRIMARY="on"
export MINIO_NOTIFY_MYSQL_DSN_STRING_PRIMARY="username:password@tcp(mysql.example.com:3306)/miniodb"
export MINIO_NOTIFY_MYSQL_TABLE_PRIMARY="minioevents"
export MINIO_NOTIFY_MYSQL_FORMAT_PRIMARY="namespace"

export MINIO_NOTIFY_MYSQL_ENABLE_SECONDARY="on"
export MINIO_NOTIFY_MYSQL_DSN_STRING_SECONDARY="username:password@tcp(mysql.example.com:3306)/miniodb"
export MINIO_NOTIFY_MYSQL_TABLE_SECONDARY="minioevents"
export MINIO_NOTIFY_MYSQL_FORMAT_SECONDARY="namespace"

mc admin config set notify_mysql:primary \
   dsn_string="username:password@tcp(mysql.example.com:3306)/miniodb"
   table="minioevents" \
   format="namespace" \
   [ARGUMENT=VALUE ...]

mc admin config set notify_mysql:secondary \
   dsn_string="username:password@tcp(mysql.example.com:3306)/miniodb"
   table="minioevents" \
   format="namespace" \
   [ARGUMENT=VALUE ...]

Settings

Enable

Required

mc admin config set notify_mysql \
  dsn_string="username:password@tcp(mysql.example.com:3306)/miniodb"
  table="minioevents" \
  format="namespace" \
  [ARGUMENT="VALUE"] ... \

Data Source Name (DSN) String

Required

Specify the data source name (DSN) of the MySQL service endpoint. MinIO expects the following format:

<user>:<password>@tcp(<host>:<port>)/<database>

For example:

"username:password@tcp(mysql.example.com:3306)/miniodb"

Table

Required

Specify the name of the MySQL table to which MinIO publishes event notifications.

Format

Required

Specify the format of event data written to the MySQL service endpoint. MinIO supports the following values:

namespace

For each bucket event, MinIO creates a JSON document with the bucket and object name from the event as the document ID and the actual event as part of the document body. Additional updates to that object modify the existing table entry for that object. Similarly, deleting the object also deletes the corresponding table entry.

access

For each bucket event, MinIO creates a JSON document with the event details and appends it to the table with a MySQL-generated random ID. Additional updates to an object result in new index entries, and existing entries remain unmodified.

Max Open Connections

Optional

Specify the maximum number of open connections to the MySQL database.

Defaults to 2.

Queue Directory

Optional

Specify the directory path to enable MinIO’s persistent event store for undelivered messages, such as /opt/minio/events.

MinIO stores undelivered events in the specified store while the MySQL server/broker is offline and replays the stored events when connectivity resumes.

Queue Limit

Optional

Specify the maximum limit for undelivered messages. Defaults to 100000.

Comment

Optional

Specify a comment to associate with the MySQL configuration.

6 - NATS Notification Settings

This page documents settings for configuring an NATS service as a target for Bucket Notifications. See Publish Events to NATS for a tutorial on using these settings.

You can establish or modify settings by defining:

• an environment variable on the host system prior to starting or restarting the MinIO Server. Refer to your operating system’s documentation for how to define an environment variable.
• a configuration setting using mc admin config set.

If you define both an environment variable and the similar configuration setting, MinIO uses the environment variable value.

Some settings have only an environment variable or a configuration setting, but not both.

Multiple NATS Targets

You can specify multiple NATS service endpoints by appending a unique identifier _ID for each set of related NATS settings on to the top level key.

Example

For example, the following commands set two distinct NATS service endpoints as PRIMARY and SECONDARY respectively:

export MINIO_NOTIFY_NATS_ENABLE_PRIMARY="on"
export MINIO_NOTIFY_NATS_ADDRESS_PRIMARY="nats-endpoint.example.net:4222"

export MINIO_NOTIFY_NATS_ENABLE_SECONDARY="on"
export MINIO_NOTIFY_NATS_ADDRESS_SECONDARY="nats-endpoint.example.net:4222"

mc admin config set notify_nats:primary \
   address="nats-endpoint.example.com:4222" \
   subject="minioevents" \
   [ARGUMENT=VALUE ...]

mc admin config set notify_nats:secondary \
   address="nats-endpoint.example.com:4222" \
   subject="minioevents" \
   [ARGUMENT=VALUE ...]

Settings

Enable

Required

mc admin config set notify_nats \
  address="nats-endpoint.example.com:4222" \
  subject="minioevents" \
  [ARGUMENT="VALUE"] ... \

Address

Required

Specify the NATS service endpoint to which MinIO publishes bucket events. For example, nats-endpoint.example.com:4222.

Subject

Required

Specify the subscription to which MinIO associates events published to the NATS endpoint.

Username

Optional

Specify the username for connecting to the NATS service endpoint.

Password

Optional

Specify the passport for connecting to the NATS service endpoint.

Token

Optional

Specify the token for connecting to the NATS service endpoint.

User Credentials File

Optional

Specify the user credentials file to use to connect to the NATS service endpoint.

TLS

Optional

Specify on to enable TLS connectivity to the NATS service endpoint.

TLS Skip Verify

Optional

Enables or disables TLS verification of the NATS service endpoint TLS certificates.

• Specify on to disable TLS verification (Default).
• Specify off to enable TLS verification.

Ping Interval

Optional

Specify the duration interval for client pings to the NATS server. MinIO supports the following time units:

• s - seconds, "60s"
• m - minutes, "5m"
• h - hours, "1h"
• d - days, "1d"

Jetstream

Optional

Specify on to enable JetStream support for streaming events to a NATS JetStream service endpoint.

Streaming

Deprecated

Optional

Specify on to enable asynchronous publishing of events to the NATS service endpoint.

Streaming Async

Deprecated

Optional

Specify on to enable asynchronous publishing of events to the NATS service endpoint.

Max ACK Responses In Flight

Deprecated

Optional

Specify the number of messages to publish without waiting for an ACK response from the NATS service endpoint.

Streaming Cluster ID

Deprecated

Optional

Specify the unique ID for the NATS streaming cluster.

Cert Authority

Optional

Specify the path to the Certificate Authority chain used to sign the NATS service endpoint TLS certificates.

Client Cert

Optional

Specify the path to the client certificate to use for performing mTLS authentication to the NATS service endpoint.

Client Key

Optional

Specify the path to the client private key to use for performing mTLS authentication to the NATS service endpoint.

Queue Directory

Optional

Specify the directory path to enable MinIO’s persistent event store for undelivered messages, such as /opt/minio/events.

MinIO stores undelivered events in the specified store while the NATS server/broker is offline and replays the stored events when connectivity resumes.

Queue Limit

Optional

Specify the maximum limit for undelivered messages. Defaults to 100000.

Comment

Optional

Specify a comment to associate with the NATS configuration.

7 - NSQ Notification Settings

This page documents settings for configuring an NSQ service as a target for Bucket Notifications. See Publish Events to NSQ for a tutorial on using these settings.

You can establish or modify settings by defining:

• an environment variable on the host system prior to starting or restarting the MinIO Server. Refer to your operating system’s documentation for how to define an environment variable.
• a configuration setting using mc admin config set.

If you define both an environment variable and the similar configuration setting, MinIO uses the environment variable value.

Some settings have only an environment variable or a configuration setting, but not both.

Multiple NSQ Targets

You can specify multiple NSQ service endpoints by appending a unique identifier _ID to the end of the top level key for each set of related NSQ settings. For example, the following commands set two distinct NSQ service endpoints as PRIMARY and SECONDARY respectively:

export MINIO_NOTIFY_NSQ_ENABLE_PRIMARY="on"
export MINIO_NOTIFY_NSQ_NSQD_ADDRESS_PRIMARY="https://user:password@nsq-endpoint.example.net:9200"
export MINIO_NOTIFY_NSQ_TOPIC_PRIMARY="bucketevents"

export MINIO_NOTIFY_NSQ_ENABLE_SECONDARY="on"
export MINIO_NOTIFY_NSQ_NSQD_ADDRESS_SECONDARY="https://user:password@nsq-endpoint.example.net:9200"
export MINIO_NOTIFY_NSQ_TOPIC_SECONDARY="bucketevents"

mc admin config set notify_nsq:primary \
   nsqd_address="ENDPOINT" \
   topic="<string>" \
   [ARGUMENT="VALUE"] ... \

mc admin config set notify_nsq:secondary \
   nsqd_address="ENDPOINT" \
   topic="<string>" \
   [ARGUMENT="VALUE"] ... \

Settings

Enable

Required

mc admin config set notify_nsq                          \
   nsqd_address="https://nsq-endpoint.example.net:4150" \
   topic="<string>"                                     \
   [ARGUMENT="VALUE"] ...

NSQ Daemon Server Address

Required

Specify the NSQ server address where the NSQ Daemon runs. For example:

https://nsq-endpoint.example.net:4150

Topic

Required

Specify the name of the NSQ topic MinIO uses when publishing events to the broker.

TLS

Optional

Specify on to enable TLS connectivity to the NSQ service broker.

TLS Skip Verify

Optional

Enables or disables TLS verification of the NSQ service broker TLS certificates.

• Specify on to disable TLS verification (Default).
• Specify off to enable TLS verification.

Queue Directory

Optional

Specify the directory path to enable MinIO’s persistent event store for undelivered messages, such as /opt/minio/events.

MinIO stores undelivered events in the specified store while the NSQ server/broker is offline and replays the stored events when connectivity resumes.

Queue Limit

Optional

Specify the maximum limit for undelivered messages. Defaults to 100000.

Comment

Optional

Specify a comment to associate with the NSQ configuration.

8 - PostgreSQL Notification Settings

This page documents settings for configuring an POSTGRES service as a target for Bucket Notifications. See Publish Events to PostgreSQL for a tutorial on using these settings.

You can establish or modify settings by defining:

• an environment variable on the host system prior to starting or restarting the MinIO Server. Refer to your operating system’s documentation for how to define an environment variable.
• a configuration setting using mc admin config set.

If you define both an environment variable and the similar configuration setting, MinIO uses the environment variable value.

Some settings have only an environment variable or a configuration setting, but not both.

Multiple PostgreSQL Targets

You can specify multiple PostgreSQL service endpoints by appending a unique identifier _ID for each set of related PostgreSQL settings on to the top level key. For example, the following commands set two distinct PostgreSQL service endpoints as PRIMARY and SECONDARY respectively:

export MINIO_NOTIFY_POSTGRES_ENABLE_PRIMARY="on"
export MINIO_NOTIFY_POSTGRES_CONNECTION_STRING_PRIMARY="host=postgresql-endpoint.example.net port=4222..."
export MINIO_NOTIFY_POSTGRES_TABLE_PRIMARY="minioevents"
export MINIO_NOTIFY_POSTGRES_FORMAT_PRIMARY="namespace"

export MINIO_NOTIFY_POSTGRES_ENABLE_SECONDARY="on"
export MINIO_NOTIFY_POSTGRES_CONNECTION_STRING_SECONDARY="host=postgresql-endpoint.example.net port=4222..."
export MINIO_NOTIFY_POSTGRES_TABLE_SECONDARY="minioevents"
export MINIO_NOTIFY_POSTGRES_FORMAT_SECONDARY="namespace"

mc admin config set notify_postgres:primary \
   connection_string="host=postgresql.example.com port=5432..."
   table="minioevents" \
   format="namespace" \
   [ARGUMENT=VALUE ...]

mc admin config set notify_postgres:secondary \
   connection_string="host=postgresql.example.com port=5432..."
   table="minioevents" \
   format="namespace" \
   [ARGUMENT=VALUE ...]

With these settings, MINIO_NOTIFY_POSTGRES_ENABLE_PRIMARY indicates the environment variable is associated to an PostgreSQL service endpoint with ID of PRIMARY.

Settings

Enable

Required

mc admin config set notify_postgres                            \
  connection_string="host=postgresql.example.com port=5432..." \
  table="minioevents"                                          \
  format="namespace"                                           \
  [ARGUMENT="VALUE"] ...

Connection String

Required

Specify the URI connection string of the PostgreSQL service endpoint. MinIO supports key=value format for the PostgreSQL connection string. For example:

"host=https://postgresql.example.com port=5432 ..."

For more complete documentation on supported PostgreSQL connection string parameters, see the PostgreSQL Connection Strings documentation.

Table

Required

Specify the name of the PostgreSQL table to which MinIO publishes event notifications.

Format

Required

Specify the format of event data written to the PostgreSQL service endpoint. MinIO supports the following values:

namespace

For each bucket event, MinIO creates a JSON document with the bucket and object name from the event as the document ID and the actual event as part of the document body. Additional updates to that object modify the existing table entry for that object. Similarly, deleting the object also deletes the corresponding table entry.

access

For each bucket event, MinIO creates a JSON document with the event details and appends it to the table with a PostgreSQL-generated random ID. Additional updates to an object result in new index entries, and existing entries remain unmodified.

Max Open Connections

Optional

Specify the maximum number of open connections to the PostgreSQL database.

Defaults to 2.

Queue Directory

Optional

Specify the directory path to enable MinIO’s persistent event store for undelivered messages, such as /opt/minio/events.

MinIO stores undelivered events in the specified store while the PostgreSQL server/broker is offline and replays the stored events when connectivity resumes.

Queue Limit

Optional

Specify the maximum limit for undelivered messages. Defaults to 100000.

Comment

Optional

Specify a comment to associate with the PostgreSQL configuration.

9 - Redis Notification Settings

This page documents settings for configuring a Redis service as a target for Bucket Notifications. See Publish Events to Redis for a tutorial on using these settings.

You can establish or modify settings by defining:

• an environment variable on the host system prior to starting or restarting the MinIO Server. Refer to your operating system’s documentation for how to define an environment variable.
• a configuration setting using mc admin config set.

If you define both an environment variable and the similar configuration setting, MinIO uses the environment variable value.

Some settings have only an environment variable or a configuration setting, but not both.

Multiple Redis Targets

You can specify multiple Redis service endpoints by appending a unique identifier _ID to the end of the top level key for each set of related Redis settings. For example, the following commands set two distinct Redis service endpoints as PRIMARY and SECONDARY respectively:

export MINIO_NOTIFY_REDIS_ENABLE_PRIMARY="on"
export MINIO_NOTIFY_REDIS_ADDRESS_PRIMARY="redis-endpoint.example.net:9200"
export MINIO_NOTIFY_REDIS_KEY_PRIMARY="bucketevents"
export MINIO_NOTIFY_REDIS_FORMAT_PRIMARY="namespace"


export MINIO_NOTIFY_REDIS_ENABLE_SECONDARY="on"
export MINIO_NOTIFY_REDIS_REDIS_ADDRESS_SECONDARY="redis-endpoint2.example.net:9200"
export MINIO_NOTIFY_REDIS_KEY_SECONDARY="bucketevents"
export MINIO_NOTIFY_REDIS_FORMAT_SECONDARY="namespace"

mc admin config set notify_redis:primary              \
   address="redis-endpoint.example.net:9200"  \
   key="bucketevents"                                 \
   format="namespace"                                 \
   [ARGUMENT="VALUE"] ...                             \

mc admin config set notify_redis:secondary            \
   address="redis-endpoint2.example.net:9200" \
   key="bucketevents"                                 \
   format="namespace"                                 \
   [ARGUMENT="VALUE"] ...

Settings

Enable

Required

mc admin config set notify_redis \
   address="ENDPOINT" \
   key="<string>" \
   format="<string>" \
   [ARGUMENT="VALUE"] ... \

Address

Required

Specify the Redis service endpoint to which MinIO publishes bucket events. For example, redis.example.com:6369.

Key

Required

Specify the Redis key to use for storing and updating events. Redis auto-creates the key if it does not exist.

Format

Required

Specify the format of event data written to the Redis service endpoint. MinIO supports the following values:

namespace

For each bucket event, MinIO creates a JSON document with the bucket and object name from the event as the document ID and the actual event as part of the document body. Additional updates to that object modify the existing index entry for that object. Similarly, deleting the object also deletes the corresponding index entry.

access

For each bucket event, MinIO creates a JSON document with the event details and appends it to the key with a Redis-generated random ID. Additional updates to an object result in new index entries, and existing entries remain unmodified.

Password

Optional

Specify the password for the Redis server.

User

Optional

Specify the user for the Redis server.

Queue Directory

Optional

Specify the directory path to enable MinIO’s persistent event store for undelivered messages, such as /opt/minio/events.

MinIO stores undelivered events in the specified store while the Redis server/broker is offline and replays the stored events when connectivity resumes.

Queue Limit

Optional

Specify the maximum limit for undelivered messages. Defaults to 100000.

Comment

Optional

Specify a comment to associate with the Redis configuration.

10 - Webhook Service Notification Settings

This page documents settings for configuring an Webhook service as a target for Bucket Notifications. See Publish Events to Webhook for a tutorial on using these settings.

You can establish or modify settings by defining:

• an environment variable on the host system prior to starting or restarting the MinIO Server. Refer to your operating system’s documentation for how to define an environment variable.
• a configuration setting using mc admin config set.

If you define both an environment variable and the similar configuration setting, MinIO uses the environment variable value.

Some settings have only an environment variable or a configuration setting, but not both.

Multiple Webhook Service Targets

You can specify multiple Webhook service endpoints by appending a unique identifier _ID for each set of related Webhook settings on to the top level key. For example, the following commands set two distinct Webhook service endpoints as PRIMARY and SECONDARY respectively:

export MINIO_NOTIFY_WEBHOOK_ENABLE_PRIMARY="on"
export MINIO_NOTIFY_WEBHOOK_ENDPOINT_PRIMARY="https://webhook1.example.net"

export MINIO_NOTIFY_WEBHOOK_ENABLE_SECONDARY="on"
export MINIO_NOTIFY_WEBHOOK_ENDPOINT_SECONDARY="https://webhook1.example.net"

mc admin config set notify_webhook:primary \
   endpoint="https://webhook1.example.net"
   [ARGUMENT=VALUE ...]

mc admin config set notify_webhook:secondary \
   endpoint="https://webhook2.example.net
   [ARGUMENT=VALUE ...]

Settings

Enable

Required

mc admin config set notify_webhook \
  endpoint="https://webhook.example.net"
  [ARGUMENT="VALUE"] ... \

Endpoint

Required

Specify the URL for the webhook service.

Auth Token

Required

export MINIO_NOTIFY_WEBHOOK_AUTH_TOKEN_myendpoint="Bearer 1a2b3c4f5e"

export MINIO_NOTIFY_WEBHOOK_AUTH_TOKEN_xyz="ServiceXYZ 1a2b3c4f5e"

   mc admin config set myminio notify_webhook   \
   endpoint="https://webhook-1.example.net"  \
      auth_token="Bearer 1a2b3c4f5e"

   mc admin config set myminio notify_webhook   \
      endpoint="https://webhook-1.example.net"  \
      auth_token="ServiceXYZ 1a2b3c4f5e"

Queue Directory

Optional

Specify the directory path to enable MinIO’s persistent event store for undelivered messages, such as /opt/minio/events.

MinIO stores undelivered events in the specified store while the webhook service is offline and replays the stored events when connectivity resumes.

Queue Limit

Optional

Specify the maximum limit for undelivered messages. Defaults to 100000.

Client Certificate

Optional

Specify the path to the client certificate to use for performing mTLS authentication to the webhook service.

Client Key

Optional

Specify the path to the client private key to use for performing mTLS authentication to the webhook service.