Druid入門系列(二): 安裝配置

Ａpacahe Druid官方一直在持續更新版本，查閱最新版本請參考：http://druid.io/docs/latest/tutorials/index.html
本文是以0.14.0版本爲例，說明druid單機版的安裝配置過程，參考自：https://druid.apache.org/docs/0.14.0-incubating/tutorials/index.html

在本文示例中，我們將下載druid並將其配置在一臺機器上。完成這個初始設置後，集羣就可以加載數據了;

環境需求

• Java 8或更高
• Linux, Mac OS X, or other Unix-like OS (不支持Windows系統)
• 8G of RAM
• 2 vCPUs

下載並解壓

下載軟件包 0.14.0-incubating release.
http://mirror.bit.edu.cn/apache/incubator/druid/0.14.0-incubating/apache-druid-0.14.0-incubating-bin.tar.gz
解壓文件包：

tar -xzf apache-druid-0.14.0-incubating-bin.tar.gz
cd apache-druid-0.14.0-incubating
ll

你將在目錄下發現以下的內容:
$\color{orange}{免責聲明、許可和通知文件}$
$\color{orange}{LICENSE}$ - license許可文件.
$\color{orange}{bin/* }$- 非常有用的快速入門腳本文件
$\color{orange}{conf/*}$ - template configurations for a clustered setup
$\color{orange}{extensions/* }$- core Druid extensions
$\color{orange}{hadoop-dependencies/*}$ - Druid Hadoop dependencies
$\color{orange}{lib/* }$- libraries and dependencies for core Druid
$\color{orange}{quickstart/*}$ - configuration files, sample data, and other files for the quickstart tutorials

下載 Zookeeper, 解壓 並啓動

curl https://archive.apache.org/dist/zookeeper/zookeeper-3.4.11/zookeeper-3.4.11.tar.gz
tar -xzf zookeeper-3.4.11.tar.gz
mv zookeeper-3.4.11 zk

注：$\color{red}{要保證zk在目錄 apache-druid-0.14.0-incubating的根目錄下}$

啓動Druid服務

在 apache-druid-0.14.0-incubating目錄下，執行如下命令

bin/supervise -c quickstart/tutorial/conf/tutorial-cluster.conf

你將看到如下的結果:

[Mon Apr 29 00:20:49 2019] Running command[zk], logging to[/usr/druid/apache-druid-0.14.0-incubating/var/sv/zk.log]: bin/run-zk quickstart/tutorial/conf
[Mon Apr 29 00:20:49 2019] Running command[coordinator], logging to[/usr/druid/apache-druid-0.14.0-incubating/var/sv/coordinator.log]: bin/run-druid coordinator quickstart/tutorial/conf
[Mon Apr 29 00:20:49 2019] Running command[broker], logging to[/usr/druid/apache-druid-0.14.0-incubating/var/sv/broker.log]: bin/run-druid broker quickstart/tutorial/conf
[Mon Apr 29 00:20:49 2019] Running command[router], logging to[/usr/druid/apache-druid-0.14.0-incubating/var/sv/router.log]: bin/run-druid router quickstart/tutorial/conf
[Mon Apr 29 00:20:49 2019] Running command[historical], logging to[/usr/druid/apache-druid-0.14.0-incubating/var/sv/historical.log]: bin/run-druid historical quickstart/tutorial/conf
[Mon Apr 29 00:20:49 2019] Running command[overlord], logging to[/usr/druid/apache-druid-0.14.0-incubating/var/sv/overlord.log]: bin/run-druid overlord quickstart/tutorial/conf
[Mon Apr 29 00:20:49 2019] Running command[middleManager], logging to[/usr/druid/apache-druid-0.14.0-incubating/var/sv/middleManager.log]: bin/run-druid middleManager quickstart/tutorial/conf

• 所有持久狀態，如集羣元數據存儲和服務段 都保存到apache-druid-0.14.0-incubating的var目錄下. 日誌信息保存到 var/sv下.
• 按 CTRL-C 可以退出服務

重置集羣狀態
如果你希望在停止服務後，下次以初始化狀態啓動服務，就刪除log和var目錄

重置kafka
假如你從kafka流加載數據，重啓服務還清除kafka態，在停止Zookeeper和Druid服務之前，使用CTRL-C關閉Kafka broker，然後刪除/tmp/ Kafka -logs上的Kafka日誌目錄

rm -rf /tmp/kafka-logs

一旦集羣啓動，就可以導航到http://localhost:8888。服務於Druid控制檯的德魯伊路由器進程駐留在這個地址。