update ceph source to reef 18.1.2

[ceph.git] / ceph / examples / lua / nats_adapter.md

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-# Introduction
-
-This directory contains examples on how to use [Lua Scripting](https://docs.ceph.com/en/latest/radosgw/lua-scripting/) together with a [NATS Lua client](https://github.com/dawnangel/lua-nats) to add NATS to the list of bucket notifications endpoints.
-
-## NATS
-To test your setup:
-* Install [NATS](https://docs.nats.io/nats-server/installation) and start a nats-server.
-
-* Subscribe to the NATS server using a [nats subscriber](https://github.com/nats-io/go-nats-examples/tree/master/patterns/publish-subscribe), choosing the topic to be 'Bucket_Notification' (as defined in the [script]())
-
-
-```bash
-nats-sub "Bucket_Notification"
-```
-
-
-[Full documentation for subscribing](https://docs.nats.io/nats-server/clients).
-
-Alternatively, configure the script to point to an existing NATS broker by editing the following part in the script to match the parameters of your existing nats server. 
-
-```
-nats_host = '{host}',
-nats_port = {port},
-```
-
-## Usage
-
-* Upload the [script]():
-
-```bash
-radosgw-admin script put --infile=nats_adapter.lua --context=postRequest
-```
-* Add the packages used in the script:
-
-```bash
-radosgw-admin script-package add --package=nats --allow-compilation
-radosgw-admin script-package add --package=lunajson --allow-compilation
-radosgw-admin script-package add --package='lua-cjson 2.1.0-1' --allow-compilation
-```
-* Restart radosgw.
-* create a bucket:
-```
-s3cmd --host=localhost:8000 --host-bucket="localhost:8000/%(bucket)" mb s3://mybucket
-```
-* upload a file to the bucket and make sure that the nats server received the notification
-
-```
-s3cmd --host=localhost:8000 --host-bucket="localhost:8000/%(bucket)" put hello.txt s3://mybucket
-```
-
-Expected output:
-```
-Received on [Bucket_Notification]:
-   {"Records":[
-       {
-           "eventVersion":"2.1",
-           "eventSource":"ceph:s3",
-           "awsRegion":"default",
-           "eventTime":"2019-11-22T13:47:35.124724Z",
-           "eventName":"ObjectCreated:Put",
-           "userIdentity":{
-               "principalId":"tester"
-           },
-           "requestParameters":{
-               "sourceIPAddress":""
-           },
-           "responseElements":{
-               "x-amz-request-id":"503a4c37-85eb-47cd-8681-2817e80b4281.5330.903595",
-               "x-amz-id-2":"14d2-zone1-zonegroup1"
-           },
-           "s3":{
-               "s3SchemaVersion":"1.0",
-               "configurationId":"mynotif1",
-               "bucket":{
-                   "name":"mybucket",
-                   "ownerIdentity":{
-                       "principalId":"tester"
-                   },
-                   "arn":"arn:aws:s3:us-east-1::mybucket1",
-                   "id":"503a4c37-85eb-47cd-8681-2817e80b4281.5332.38"
-               },
-               "object":{
-                   "key":"hello.txt",
-                   "size":"1024",
-                   "eTag":"",
-                   "versionId":"",
-                   "sequencer": "F7E6D75DC742D108",
-                   "metadata":[],
-                   "tags":[]
-               }
-           },
-           "eventId":"",
-           "opaqueData":"me@example.com"
-       }
-   ]}
-
-```
-
-## Requirements
-* Lua 5.3 (or higher)
-* Luarocks