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Add NATS Streaming doc to event notification doc (#4645)

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Nitish Tiwari 2017-07-07 23:37:12 -07:00 committed by Dee Koder
parent f5ce685aa1
commit 45fbb0d618
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docs/bucket/notifications/README.md
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@ -490,12 +490,44 @@ The default location of Minio server configuration file is ``~/.minio/config.jso
"token": "",
"secure": false,
"pingInterval": 0
"streaming": {
"enable": false,
"clusterID": "",
"clientID": "",
"async": false,
"maxPubAcksInflight": 0
}
}
},
```
Restart Minio server to reflect config changes. ``bucketevents`` is the subject used by NATS in this example.
Minio server also supports [NATS Streaming mode](http://nats.io/documentation/streaming/nats-streaming-intro/) that offers additional functionality like `Message/event persistence`, `At-least-once-delivery`, and `Publisher rate limiting`. To configure Minio server to send notifications to NATS Streaming server, update the Minio server configuration file as follows:
```
"nats": {
"1": {
"enable": true,
"address": "0.0.0.0:4222",
"subject": "bucketevents",
"username": "yourusername",
"password": "yoursecret",
"token": "",
"secure": false,
"pingInterval": 0
"streaming": {
"enable": true,
"clusterID": "test-cluster",
"clientID": "minio-client",
"async": true,
"maxPubAcksInflight": 10
}
}
},
```
Read more about sections `clusterID`, `clientID` on [NATS documentation](https://github.com/nats-io/nats-streaming-server/blob/master/README.md). Section `maxPubAcksInflight` is explained [here](https://github.com/nats-io/go-nats-streaming#publisher-rate-limiting).
### 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.
@ -509,7 +541,7 @@ arn:minio:sqs:us-east-1:1:nats s3:ObjectCreated:*,s3:ObjectRemoved:* Filter: suf
### Step 3: Test on NATS
Using this program below we can log the bucket notification added to NATS.
If you use NATS server, check out this sample program below to log the bucket notification added to NATS.
```go
package main
@ -562,6 +594,53 @@ go run nats.go
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"}
```
If you use NATS Streaming server, check out this sample program below to log the bucket notification added to NATS.
```go
package main
// Import Go and NATS packages
import (
"fmt"
"runtime"
"github.com/nats-io/go-nats-streaming"
)
func main() {
natsConnection, _ := stan.Connect("test-cluster", "test-client")
log.Println("Connected")
// Subscribe to subject
log.Printf("Subscribing to subject 'bucketevents'\n")
natsConnection.Subscribe("bucketevents", func(m *stan.Msg) {
// Handle the message
fmt.Printf("Received a message: %s\n", string(m.Data))
})
// Keep the connection alive
runtime.Goexit()
}
```
```
go run nats.go
2017/07/07 11:47:40 Connected
2017/07/07 11:47:40 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.
```
Received a message: {"EventType":"s3:ObjectCreated:Put","Key":"images/myphoto.jpg","Records":[{"eventVersion":"2.0","eventSource":"minio:s3","awsRegion":"","eventTime":"2017-07-07T18:46:37Z","eventName":"s3:ObjectCreated:Put","userIdentity":{"principalId":"minio"},"requestParameters":{"sourceIPAddress":"192.168.1.80:55328"},"responseElements":{"x-amz-request-id":"14CF20BD1EFD5B93","x-minio-origin-endpoint":"http://127.0.0.1:9000"},"s3":{"s3SchemaVersion":"1.0","configurationId":"Config","bucket":{"name":"images","ownerIdentity":{"principalId":"minio"},"arn":"arn:aws:s3:::images"},"object":{"key":"myphoto.jpg","size":248682,"eTag":"f1671feacb8bbf7b0397c6e9364e8c92","contentType":"image/jpeg","userDefined":{"content-type":"image/jpeg"},"versionId":"1","sequencer":"14CF20BD1EFD5B93"}},"source":{"host":"192.168.1.80","port":"55328","userAgent":"Minio (linux; amd64) minio-go/2.0.4 mc/DEVELOPMENT.GOGET"}}],"level":"info","msg":"","time":"2017-07-07T11:46:37-07:00"}
```
<a name="PostgreSQL"></a>
## Publish Minio events via PostgreSQL