# Minio Bucket Notification Reference Guide [](https://slack.minio.io)
Minio server supports Amazon S3 compatible bucket event notification for the following targets
| Notification Targets|
|:---|
| [`AMQP`](#AMQP) |
| [`Elasticsearch`](#Elasticsearch) |
| [`Redis`](#Redis) |
| [`NATS`](#NATS) |
| [`PostgreSQL`](#PostgreSQL) |
| [`Apache Kafka`](#apache-kafka) |
## Prerequisites
* Install and configure Minio Server from [here](http://docs.minio.io/docs/minio).
* Install and configure Minio Client from [here](https://docs.minio.io/docs/minio-client-quickstart-guide).
## Publish Minio events via AMQP
Install RabbitMQ from [here](https://www.rabbitmq.com/).
### Step 1: Add AMQP endpoint to Minio
The default location of Minio server configuration file is ``~/.minio/config.json``. Update the AMQP configuration block in ``config.json`` as follows:
```json
"amqp": {
"1": {
"enable": true,
"url": "amqp://myuser:mypassword@localhost:5672",
"exchange": "bucketevents",
"routingKey": "bucketlogs",
"exchangeType": "fanout",
"mandatory": false,
"immediate": false,
"durable": false,
"internal": false,
"noWait": false,
"autoDeleted": false
}
}
```
Restart Minio server to reflect config changes. Minio supports all the exchanges available in [RabbitMQ](https://www.rabbitmq.com/). For this setup, we are using ``fanout`` exchange.
### Step 2: Enable bucket notification using Minio client
We will enable bucket event notification to trigger whenever a JPEG image is uploaded or deleted ``images`` bucket on ``myminio`` server. Here ARN value is ``arn:minio:sqs:us-east-1:1:amqp``. To understand more about ARN please follow [AWS ARN](http://docs.aws.amazon.com/general/latest/gr/aws-arns-and-namespaces.html) documentation.
```
mc mb myminio/images
mc events add myminio/images arn:minio:sqs:us-east-1:1:amqp --suffix .jpg
mc events list myminio/images
arn:minio:sqs:us-east-1:1:amqp s3:ObjectCreated:*,s3:ObjectRemoved:* Filter: suffix=”.jpg”
```
### Step 3: Test on RabbitMQ
The python program below waits on the queue exchange ``bucketevents`` and prints event notifications on the console. We use [Pika Python Client](https://www.rabbitmq.com/tutorials/tutorial-three-python.html) library to do this.
```py
#!/usr/bin/env python
import pika
connection = pika.BlockingConnection(pika.ConnectionParameters(
host='localhost'))
channel = connection.channel()
channel.exchange_declare(exchange='bucketevents',
type='fanout')
result = channel.queue_declare(exclusive=False)
queue_name = result.method.queue
channel.queue_bind(exchange='bucketevents',
queue=queue_name)
print(' [*] Waiting for logs. To exit press CTRL+C')
def callback(ch, method, properties, body):
print(" [x] %r" % body)
channel.basic_consume(callback,
queue=queue_name,
no_ack=False)
channel.start_consuming()
```
Execute this example python program to watch for RabbitMQ events on the console.
```py
python rabbit.py
```
Open another terminal and upload a JPEG image into ``images`` bucket.
```
mc cp myphoto.jpg myminio/images
```
You should receive the following event notification via RabbitMQ once the upload completes.
```py
python rabbit.py
‘{“Records”:[{“eventVersion”:”2.0",”eventSource”:”aws:s3",”awsRegion”:”us-east-1",”eventTime”:”2016–09–08T22:34:38.226Z”,”eventName”:”s3:ObjectCreated:Put”,”userIdentity”:{“principalId”:”minio”},”requestParameters”:{“sourceIPAddress”:”10.1.10.150:44576"},”responseElements”:{},”s3":{“s3SchemaVersion”:”1.0",”configurationId”:”Config”,”bucket”:{“name”:”images”,”ownerIdentity”:{“principalId”:”minio”},”arn”:”arn:aws:s3:::images”},”object”:{“key”:”myphoto.jpg”,”size”:200436,”sequencer”:”147279EAF9F40933"}}}],”level”:”info”,”msg”:””,”time”:”2016–09–08T15:34:38–07:00"}\n
```
## Publish Minio events via Elasticsearch
Install Elasticsearch 2.4 from [here](https://www.elastic.co/downloads/past-releases/elasticsearch-2-4-0).
## Recipe steps
### Step 1: Add Elasticsearch endpoint to Minio
The default location of Minio server configuration file is ``~/.minio/config.json``. Update the Elasticsearch configuration block in ``config.json`` as follows:
```json
"elasticsearch": {
"1": {
"enable": true,
"url": "http://127.0.0.1:9200",
"index": "bucketevents"
}
},
```
Restart Minio server to reflect config changes. ``bucketevents`` is the index used by Elasticsearch.
### Step 2: Enable bucket notification using Minio client
We will enable bucket event notification to trigger whenever a JPEG image is uploaded or deleted from ``images`` bucket on ``myminio`` server. Here ARN value is ``arn:minio:sqs:us-east-1:1:elasticsearch``. To understand more about ARN please follow [AWS ARN](http://docs.aws.amazon.com/general/latest/gr/aws-arns-and-namespaces.html) documentation.
```
mc mb myminio/images
mc events add myminio/images arn:minio:sqs:us-east-1:1:elasticsearch --suffix .jpg
mc events list myminio/images
arn:minio:sqs:us-east-1:1:elasticsearch s3:ObjectCreated:*,s3:ObjectRemoved:* Filter: suffix=”.jpg”
```
### Step 3: Test on Elasticsearch
Upload a JPEG image into ``images`` bucket, this is the bucket which has been configured for event notification.
```
mc cp myphoto.jpg myminio/images
```
Run ``curl`` to see new index name ``bucketevents`` in your Elasticsearch setup.
```
curl -XGET '127.0.0.1:9200/_cat/indices?v'
health status index pri rep docs.count docs.deleted store.size pri.store.size
yellow open bucketevents 5 1 1 0 7.8kb 7.8kb
```
Use curl to view contents of ``bucketevents`` index.
```
curl -XGET '127.0.0.1:9200/bucketevents/_search?pretty=1'
{
"took" : 3,
"timed_out" : false,
"_shards" : {
"total" : 5,
"successful" : 5,
"failed" : 0
},
"hits" : {
"total" : 1,
"max_score" : 1.0,
"hits" : [ {
"_index" : "bucketevents",
"_type" : "event",
"_id" : "AVcRVOlwe-uNB1tfj6bx",
"_score" : 1.0,
"_source" : {
"Records" : [ {
"eventVersion" : "2.0",
"eventSource" : "aws:s3",
"awsRegion" : "us-east-1",
"eventTime" : "2016-09-09T23:42:39.977Z",
"eventName" : "s3:ObjectCreated:Put",
"userIdentity" : {
"principalId" : "minio"
},
"requestParameters" : {
"sourceIPAddress" : "10.1.10.150:52140"
},
"responseElements" : { },
"s3" : {
"s3SchemaVersion" : "1.0",
"configurationId" : "Config",
"bucket" : {
"name" : "images",
"ownerIdentity" : {
"principalId" : "minio"
},
"arn" : "arn:aws:s3:::images"
},
"object" : {
"key" : "myphoto.jpg",
"size" : 200436,
"sequencer" : "1472CC35E6971AF3"
}
}
} ]
}
} ]
}
}
```
``curl`` output above states that an Elasticsearch index has been successfully created with notification contents.
## Publish Minio events via Redis
Install Redis from [here](http://redis.io/download).
### Step 1: Add Redis endpoint to Minio
The default location of Minio server configuration file is ``~/.minio/config.json``. Update the Redis configuration block in ``config.json`` as follows:
```json
"redis": {
"1": {
"enable": true,
"address": "127.0.0.1:6379",
"password": "yoursecret",
"key": "bucketevents"
}
}
```
Restart Minio server to reflect config changes. ``bucketevents`` is the key used by Redis in this example.
### Step 2: Enable bucket notification using Minio client
We will enable bucket event notification to trigger whenever a JPEG image is uploaded or deleted from ``images`` bucket on ``myminio`` server. Here ARN value is ``arn:minio:sqs:us-east-1:1:redis``. To understand more about ARN please follow [AWS ARN](http://docs.aws.amazon.com/general/latest/gr/aws-arns-and-namespaces.html) documentation.
```
mc mb myminio/images
mc events add myminio/images arn:minio:sqs:us-east-1:1:redis --suffix .jpg
mc events list myminio/images
arn:minio:sqs:us-east-1:1:redis s3:ObjectCreated:*,s3:ObjectRemoved:* Filter: suffix=”.jpg”
```
### Step 3: Test on Redis
Redis comes with a handy command line interface ``redis-cli`` to print all notifications on the console.
```
redis-cli -a yoursecret
```
Open another terminal and upload a JPEG image into ``images`` bucket.
```
mc cp myphoto.jpg myminio/images
```
``redis-cli`` prints event notification to the console.
```
redis-cli -a yoursecret
127.0.0.1:6379> monitor
OK
1474321638.556108 [0 127.0.0.1:40190] "AUTH" "yoursecret"
1474321638.556477 [0 127.0.0.1:40190] "RPUSH" "bucketevents" "{\"Records\":[{\"eventVersion\":\"2.0\",\"eventSource\":\"aws:s3\",\"awsRegion\":\"us-east-1\",\"eventTime\":\"2016-09-19T21:47:18.555Z\",\"eventName\":\"s3:ObjectCreated:Put\",\"userIdentity\":{\"principalId\":\"minio\"},\"requestParameters\":{\"sourceIPAddress\":\"[::1]:39250\"},\"responseElements\":{},\"s3\":{\"s3SchemaVersion\":\"1.0\",\"configurationId\":\"Config\",\"bucket\":{\"name\":\"images\",\"ownerIdentity\":{\"principalId\":\"minio\"},\"arn\":\"arn:aws:s3:::images\"},\"object\":{\"key\":\"myphoto.jpg\",\"size\":23745,\"sequencer\":\"1475D7B80ECBD853\"}}}],\"level\":\"info\",\"msg\":\"\",\"time\":\"2016-09-19T14:47:18-07:00\"}\n"
```
## Publish Minio events via NATS
Install NATS from [here](http://nats.io/).
### Step 1: Add NATS endpoint to Minio
The default location of Minio server configuration file is ``~/.minio/config.json``. Update the NATS configuration block in ``config.json`` as follows:
```
"nats": {
"1": {
"enable": true,
"address": "0.0.0.0:4222",
"subject": "bucketevents",
"username": "yourusername",
"password": "yoursecret",
"token": "",
"secure": false,
"pingInterval": 0
}
},
```
Restart Minio server to reflect config changes. ``bucketevents`` is the subject used by NATS in this example.
### Step 2: Enable bucket notification using Minio client
We will enable bucket event notification to trigger whenever a JPEG image is uploaded or deleted from ``images`` bucket on ``myminio`` server. Here ARN value is ``arn:minio:sqs:us-east-1:1:nats``. To understand more about ARN please follow [AWS ARN](http://docs.aws.amazon.com/general/latest/gr/aws-arns-and-namespaces.html) documentation.
```
mc mb myminio/images
mc events add myminio/images arn:minio:sqs:us-east-1:1:nats --suffix .jpg
mc events list myminio/images
arn:minio:sqs:us-east-1:1:nats s3:ObjectCreated:*,s3:ObjectRemoved:* Filter: suffix=”.jpg”
```
### Step 3: Test on NATS
Using this program below we can log the bucket notification added to NATS.
```go
package main
// Import Go and NATS packages
import (
"log"
"runtime"
"github.com/nats-io/nats"
)
func main() {
// Create server connection
natsConnection, _ := nats.Connect("nats://yourusername:yoursecret@localhost:4222")
log.Println("Connected")
// Subscribe to subject
log.Printf("Subscribing to subject 'bucketevents'\n")
natsConnection.Subscribe("bucketevents", func(msg *nats.Msg) {
// Handle the message
log.Printf("Received message '%s\n", string(msg.Data)+"'")
})
// Keep the connection alive
runtime.Goexit()
}
```
```
go run nats.go
2016/10/12 06:39:18 Connected
2016/10/12 06:39:18 Subscribing to subject 'bucketevents'
```
Open another terminal and upload a JPEG image into ``images`` bucket.
```
mc cp myphoto.jpg myminio/images
```
The example ``nats.go`` program prints event notification to console.
```
go run nats.go
2016/10/12 06:51:26 Connected
2016/10/12 06:51:26 Subscribing to subject 'bucketevents'
2016/10/12 06:51:33 Received message '{"EventType":"s3:ObjectCreated:Put","Key":"images/myphoto.jpg","Records":[{"eventVersion":"2.0","eventSource":"aws:s3","awsRegion":"us-east-1","eventTime":"2016-10-12T13:51:33Z","eventName":"s3:ObjectCreated:Put","userIdentity":{"principalId":"minio"},"requestParameters":{"sourceIPAddress":"[::1]:57106"},"responseElements":{},"s3":{"s3SchemaVersion":"1.0","configurationId":"Config","bucket":{"name":"images","ownerIdentity":{"principalId":"minio"},"arn":"arn:aws:s3:::images"},"object":{"key":"myphoto.jpg","size":56060,"eTag":"1d97bf45ecb37f7a7b699418070df08f","sequencer":"147CCD1AE054BFD0"}}}],"level":"info","msg":"","time":"2016-10-12T06:51:33-07:00"}
```
## Publish Minio events via PostgreSQL
Install PostgreSQL from [here](https://www.postgresql.org/).
### Step 1: Add PostgreSQL endpoint to Minio
The default location of Minio server configuration file is ``~/.minio/config.json``. Update the PostgreSQL configuration block in ``config.json`` as follows:
```
"postgresql": {
"1": {
"enable": true,
"connectionString": "",
"table": "bucketevents",
"host": "127.0.0.1",
"port": "5432",
"user": "postgres",
"password": "mypassword",
"database": "bucketevents_db"
}
}
```
Restart Minio server to reflect config changes. ``bucketevents`` is the database table used by PostgreSQL in this example.
### Step 2: Enable bucket notification using Minio client
We will enable bucket event notification to trigger whenever a JPEG image is uploaded or deleted from ``images`` bucket on ``myminio`` server. Here ARN value is ``arn:minio:sqs:us-east-1:1:postgresql``. To understand more about ARN please follow [AWS ARN](http://docs.aws.amazon.com/general/latest/gr/aws-arns-and-namespaces.html) documentation.
```
mc mb myminio/images
mc events add myminio/images arn:minio:sqs:us-east-1:1:postgresql --suffix .jpg
mc events list myminio/images
arn:minio:sqs:us-east-1:1:postgresql s3:ObjectCreated:*,s3:ObjectRemoved:* Filter: suffix=”.jpg”
```
### Step 3: Test on PostgreSQL
Open another terminal and upload a JPEG image into ``images`` bucket.
```
mc cp myphoto.jpg myminio/images
```
Open PostgreSQL terminal to list the saved event notification logs.
```
bucketevents_db=# select * from bucketevents;
key | value
--------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
images/myphoto.jpg | {"Records": [{"s3": {"bucket": {"arn": "arn:aws:s3:::images", "name": "images", "ownerIdentity": {"principalId": "minio"}}, "object": {"key": "myphoto.jpg", "eTag": "1d97bf45ecb37f7a7b699418070df08f", "size": 56060, "sequencer": "147CE57C70B31931"}, "configurationId": "Config", "s3SchemaVersion": "1.0"}, "awsRegion": "us-east-1", "eventName": "s3:ObjectCreated:Put", "eventTime": "2016-10-12T21:18:20Z", "eventSource": "aws:s3", "eventVersion": "2.0", "userIdentity": {"principalId": "minio"}, "responseElements": {}, "requestParameters": {"sourceIPAddress": "[::1]:39706"}}]}
(1 row)
```
## Publish Minio events via kafka
Install kafka from [here](http://kafka.apache.org/).
### Step 1: Add kafka endpoint to Minio
The default location of Minio server configuration file is ``~/.minio/config.json``. Update the kafka configuration block in ``config.json`` as follows:
```
"kafka": {
"1": {
"enable": true,
"brokers": ["localhost:9092"],
"topic": "bucketevents"
}
}
```
Restart Minio server to reflect config changes. ``bucketevents`` is the topic used by kafka in this example.
### Step 2: Enable bucket notification using Minio client
We will enable bucket event notification to trigger whenever a JPEG image is uploaded or deleted from ``images`` bucket on ``myminio`` server. Here ARN value is ``arn:minio:sqs:us-east-1:1:kafka``. To understand more about ARN please follow [AWS ARN](http://docs.aws.amazon.com/general/latest/gr/aws-arns-and-namespaces.html) documentation.
```
mc mb myminio/images
mc events add myminio/images arn:minio:sqs:us-east-1:1:kafka --suffix .jpg
mc events list myminio/images
arn:minio:sqs:us-east-1:1:kafka s3:ObjectCreated:*,s3:ObjectRemoved:* Filter: suffix=”.jpg”
```
### Step 3: Test on kafka
We used [kafkacat](https://github.com/edenhill/kafkacat) to print all notifications on the console.
```
kafkacat -b localhost:9092 -t bucketevents
```
Open another terminal and upload a JPEG image into ``images`` bucket.
```
mc cp myphoto.jpg myminio/images
```
``kafkacat`` prints the event notification to the console.
```
kafkacat -b localhost:9092 -t bucketevents
{"EventType":"s3:ObjectCreated:Put","Key":"images/myphoto.jpg","Records":[{"eventVersion":"2.0","eventSource":"aws:s3","awsRegion":"us-east-1","eventTime":"2017-01-31T10:01:51Z","eventName":"s3:ObjectCreated:Put","userIdentity":{"principalId":"88QR09S7IOT4X1IBAQ9B"},"requestParameters":{"sourceIPAddress":"192.173.5.2:57904"},"responseElements":{"x-amz-request-id":"149ED2FD25589220","x-minio-origin-endpoint":"http://192.173.5.2:9000"},"s3":{"s3SchemaVersion":"1.0","configurationId":"Config","bucket":{"name":"images","ownerIdentity":{"principalId":"88QR09S7IOT4X1IBAQ9B"},"arn":"arn:aws:s3:::images"},"object":{"key":"myphoto.jpg","size":541596,"eTag":"04451d05b4faf4d62f3d538156115e2a","sequencer":"149ED2FD25589220"}}}],"level":"info","msg":"","time":"2017-01-31T15:31:51+05:30"}
```
*NOTE* If you are running [distributed Minio](https://docs.minio.io/docs/distributed-minio-quickstart-guide), modify ``~/.minio/config.json`` on all the nodes with your bucket event notification backend configuration.