mirror of https://github.com/apache/druid.git
113 lines
3.9 KiB
Markdown
113 lines
3.9 KiB
Markdown
---
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id: build
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title: "Build from source"
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---
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<!--
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~ Licensed to the Apache Software Foundation (ASF) under one
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~ or more contributor license agreements. See the NOTICE file
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~ distributed with this work for additional information
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~ regarding copyright ownership. The ASF licenses this file
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~ to you under the Apache License, Version 2.0 (the
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~ "License"); you may not use this file except in compliance
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~ with the License. You may obtain a copy of the License at
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~
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~ http://www.apache.org/licenses/LICENSE-2.0
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~
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~ Unless required by applicable law or agreed to in writing,
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~ software distributed under the License is distributed on an
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~ "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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~ KIND, either express or implied. See the License for the
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~ specific language governing permissions and limitations
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~ under the License.
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-->
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You can build Apache Druid directly from source. Use the version of this page
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that matches the version you want to build.
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For building the latest code in master, follow the latest version of this page
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[here](https://github.com/apache/druid/blob/master/docs/development/build.md):
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make sure it has `/master/` in the URL.
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#### Prerequisites
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##### Installing Java and Maven
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- JDK 8, 8u92+. We recommend using an OpenJDK distribution that provides long-term support and open-source licensing,
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like [Amazon Corretto](https://aws.amazon.com/corretto/) or [Azul Zulu](https://www.azul.com/downloads/zulu/).
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- [Maven version 3.x](http://maven.apache.org/download.cgi)
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##### Other dependencies
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- Distribution builds require Python 3.x and the `pyyaml` module
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##### Downloading the source
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```bash
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git clone git@github.com:apache/druid.git
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cd druid
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```
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#### Building from source
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The basic command to build Druid from source is:
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```bash
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mvn clean install
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```
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This will run static analysis, unit tests, compile classes, and package the projects into JARs. It will _not_ generate the source or binary distribution tarball.
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In addition to the basic stages, you may also want to add the following profiles and properties:
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- **-Pdist** - Distribution profile: Generates the binary distribution tarball by pulling in core extensions and dependencies and packaging the files as `distribution/target/apache-druid-x.x.x-bin.tar.gz`
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- **-Papache-release** - Apache release profile: Generates GPG signature and checksums, and builds the source distribution tarball as `distribution/target/apache-druid-x.x.x-src.tar.gz`
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- **-Prat** - Apache Rat profile: Runs the Apache Rat license audit tool
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- **-DskipTests** - Skips unit tests (which reduces build time)
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- **-Ddruid.console.skip=true** - Skip front end project
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Putting these together, if you wish to build the source and binary distributions with signatures and checksums, audit licenses, and skip the unit tests, you would run:
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```bash
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mvn clean install -Papache-release,dist,rat -DskipTests
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```
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### Building hadoop 3 distribution
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By default, druid ships hadoop 2.x.x jars along with the distribution. Exact version can be found in the
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main [pom](https://github.com/apache/druid/blob/master/pom.xml). To build druid with hadoop 3.x.x jars, hadoop3 profile
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needs to be activated.
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To generate build with hadoop 3 dependencies, run:
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```bash
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mvn clean install -Phadoop3
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```
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To generate distribution with hadoop3 dependencies, run :
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```bash
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mvn clean install -Papache-release,dist-hadoop3,rat,hadoop3 -DskipTests
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```
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#### Potential issues
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##### Missing `pyyaml`
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You are building Druid from source following the instructions on this page but you get
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```
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[ERROR] Failed to execute goal org.codehaus.mojo:exec-maven-plugin:1.6.0:exec (generate-binary-license) on project distribution: Command execution failed.: Process exited with an error: 1 (Exit value: 1) -> [Help 1]
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```
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Resolution: Make sure you have Python installed as well as the `yaml` module:
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```bash
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pip install pyyaml
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```
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On some systems, ensure you use the Python 3.x version of `pip`:
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```bash
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pip3 install pyyaml
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```
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