mirror of https://github.com/apache/druid.git
105 lines
4.5 KiB
Markdown
105 lines
4.5 KiB
Markdown
---
|
|
layout: doc_page
|
|
title: "Tutorial: Load streaming data with HTTP push"
|
|
---
|
|
|
|
<!--
|
|
~ Licensed to the Apache Software Foundation (ASF) under one
|
|
~ or more contributor license agreements. See the NOTICE file
|
|
~ distributed with this work for additional information
|
|
~ regarding copyright ownership. The ASF licenses this file
|
|
~ to you under the Apache License, Version 2.0 (the
|
|
~ "License"); you may not use this file except in compliance
|
|
~ with the License. You may obtain a copy of the License at
|
|
~
|
|
~ http://www.apache.org/licenses/LICENSE-2.0
|
|
~
|
|
~ Unless required by applicable law or agreed to in writing,
|
|
~ software distributed under the License is distributed on an
|
|
~ "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
|
|
~ KIND, either express or implied. See the License for the
|
|
~ specific language governing permissions and limitations
|
|
~ under the License.
|
|
-->
|
|
|
|
# Tutorial: Load streaming data with HTTP push
|
|
|
|
## Getting started
|
|
|
|
This tutorial shows you how to load streaming data into Apache Druid (incubating) using HTTP push via Tranquility Server.
|
|
|
|
[Tranquility Server](https://github.com/druid-io/tranquility/blob/master/docs/server.md) allows a stream of data to be pushed into Druid using HTTP POSTs.
|
|
|
|
For this tutorial, we'll assume you've already downloaded Druid as described in
|
|
the [quickstart](index.html) using the `micro-quickstart` single-machine configuration and have it
|
|
running on your local machine. You don't need to have loaded any data yet.
|
|
|
|
## Download Tranquility
|
|
|
|
In the Druid package root, run the following commands:
|
|
|
|
```bash
|
|
curl http://static.druid.io/tranquility/releases/tranquility-distribution-0.8.3.tgz -o tranquility-distribution-0.8.3.tgz
|
|
tar -xzf tranquility-distribution-0.8.3.tgz
|
|
mv tranquility-distribution-0.8.3 tranquility
|
|
```
|
|
|
|
The startup scripts for the tutorial will expect the contents of the Tranquility tarball to be located at `tranquility` under the apache-druid-#{DRUIDVERSION} package root.
|
|
|
|
## Enable Tranquility Server
|
|
|
|
- In your `conf/supervise/single-server/micro-quickstart.conf`, uncomment the `tranquility-server` line.
|
|
- Stop *micro-quickstart* cluster command (CTRL-C) then restart it again by running `bin/start-micro-quickstart`
|
|
|
|
As part of the output of *supervise* you should see something like:
|
|
|
|
```bash
|
|
Running command[tranquility-server], logging to[/stage/apache-druid-#{DRUIDVERSION}/var/sv/tranquility-server.log]: tranquility/bin/tranquility server -configFile conf/tranquility/server.json -Ddruid.extensions.loadList=[]
|
|
```
|
|
|
|
You can check the log file in `var/sv/tranquility-server.log` to confirm that the server is starting up properly.
|
|
|
|
## Send data
|
|
|
|
Let's send the sample Wikipedia edits data to Tranquility:
|
|
|
|
```bash
|
|
gunzip -k quickstart/tutorial/wikiticker-2015-09-12-sampled.json.gz
|
|
curl -XPOST -H'Content-Type: application/json' --data-binary @quickstart/tutorial/wikiticker-2015-09-12-sampled.json http://localhost:8200/v1/post/wikipedia
|
|
```
|
|
|
|
Which will print something like:
|
|
|
|
```json
|
|
{"result":{"received":39244,"sent":39244}}
|
|
```
|
|
|
|
This indicates that the HTTP server received 39,244 events from you, and sent 39,244 to Druid. This
|
|
command may generate a "connection refused" error if you run it too quickly after enabling Tranquility
|
|
Server, which means the server has not yet started up. It should start up within a few seconds. The command
|
|
may also take a few seconds to finish the first time you run it, during which time Druid resources are being
|
|
allocated to the ingestion task. Subsequent POSTs will complete quickly once this is done.
|
|
|
|
Once the data is sent to Druid, you can immediately query it.
|
|
|
|
If you see a `sent` count of 0, retry the send command until the `sent` count also shows 39244:
|
|
|
|
```json
|
|
{"result":{"received":39244,"sent":0}}
|
|
```
|
|
|
|
## Querying your data
|
|
|
|
Please follow the [query tutorial](../tutorials/tutorial-query.html) to run some example queries on the newly loaded data.
|
|
|
|
## Cleanup
|
|
|
|
If you wish to go through any of the other ingestion tutorials, you will need to shut down the cluster and reset the cluster state by removing the contents of the `var` directory under the druid package, as the other tutorials will write to the same "wikipedia" datasource.
|
|
|
|
When cleaning up after running this Tranquility tutorial, it is also necessary to recomment the `tranquility-server` line in `conf/supervise/single-server/micro-quickstart.conf` before restarting the cluster.
|
|
|
|
|
|
## Further reading
|
|
|
|
For more information on Tranquility, please see [the Tranquility documentation](https://github.com/druid-io/tranquility).
|