Building Flowman from Sources#
Since Flowman depends on libraries like Spark and Hadoop, which are commonly provided by a platform environment like Cloudera or EMR, you currently need to build Flowman yourself to match the correct versions.
Download Prebuilt Distribution#
The simplest way to get started with Flowman is to download a prebuilt distribution, which is provided at GitHub. This probably is the simplest way to grab a working Flowman package. Note that for each release, there are different packages being provided, for different Spark and Hadoop versions. The naming is very simple:
flowman-dist-<version>-oss-spark<spark-version>-hadoop<hadoop-version>-bin.tar.gz
You simply have to use the package which fits to the Spark and Hadoop versions of your environment. For example the package of Flowman 0.24.1 and for Spark 3.1 and Hadoop 3.2 would be
flowman-dist-0.24.1-oss-spark3.1-hadoop3.2-bin.tar.gz
and the full URL then would be
https://github.com/dimajix/flowman/releases/download/0.24.1/flowman-dist-0.24.1-oss-spark3.1-hadoop3.2-bin.tar.gz
Build with Maven#
The whole project is built using Maven. The build also includes a Docker image, which requires that Docker is installed on the build machine.
Prerequisites#
When you decide against downloading a prebuilt Flowman distribution, you can simply build it yourself with Maven. As a prerequisite, you need
Java (1.8 for Spark ≤ 2.4 and 11 for Spark ≥ 3.0)
Apache Maven (install via package manager download from https://maven.apache.org/download.cgi)
npm (install via package manager or download from https://www.npmjs.com/get-npm)
Docker (the creation of the Docker image can be skipped via
-Ddockerfile.skip
)gpg (signing can be disabled via
-Dgpg.skip
)Windows users also need Hadoop winutils installed. Those can be retrieved from https://github.com/cdarlint/winutils and later. See some additional details for building on Windows below.
For running the integration tests in the tests
directory, you will need some additional components installed:
xmlstarlet
Build with Maven#
Building Flowman with the default settings (i.e. Hadoop and Spark version) is as easy as
mvn clean install
Skip Tests#
In case you don’t want to run tests, you can simply append -DskipTests
mvn clean install -DskipTests
Skip Docker Image#
In case you don’t want to build the Docker image (for example when the build itself is done within a Docker container),
you can simply append -Ddockerfile.skip
mvn clean install -Ddockerfile.skip
Main Artifacts#
The main artifacts will be a Docker image dimajix/flowman
and additionally a tar.gz
file containing a runnable
version of Flowman for direct installation in cases where Docker is not available or when you want to run Flowman
in a complex environment with Kerberos. You can find the tar.gz
file in the directory flowman-dist/target
.
This tar.gz
file contains all executables and libraries. You can install Flowman from this archive by simply
extracting its contents using tar
.
Custom Builds#
Flowman supports various versions of Spark and Hadoop to match your requirements and your environment. By providing appropriate build profiles, you can easily create a custom build.
Build on Windows#
Although you can normally build Flowman on Windows, you will need the Hadoop Winutils installed. You can download the binaries from https://github.com/steveloughran/winutils and install an appropriate version somewhere onto your machine. Do not forget to set the HADOOP_HOME environment variable to the installation directory of these utils!
You should also configure git such that all files are checked out using “LF” endings instead of “CRLF”, otherwise
some unit tests may fail, and Docker images might not be useable. This can be done by setting the git configuration
value core.autocrlf
to input
:
git config --global core.autocrlf input
You might also want to skip unit tests (the HBase plugin is currently failing under windows)
mvn clean install -DskipTests
Build for Custom Spark / Hadoop Version#
Per default, Flowman will be built for fairly recent versions of Spark (3.0.2 as of this writing) and Hadoop (3.2.0). But of course, you can also build for a different version by either using a profile
mvn install -Pspark2.4 -Phadoop2.7 -DskipTests
This will always select the latest bug fix version within the minor version. You can also specify versions explicitly as follows:
mvn install -Dspark.version=2.4.1 -Dhadoop.version=2.7.3
Note that using profiles is the preferred way, as this guarantees that also dependencies are selected using the correct version. The following profiles are available:
spark-2.4
spark-3.0
spark-3.1
spark-3.2
spark-3.3
spark-3.4
hadoop-2.6
hadoop-2.7
hadoop-2.8
hadoop-2.9
hadoop-3.1
hadoop-3.2
hadoop-3.3
EMR-6.12
synapse-3.3
CDH-6.3
CDP-7.1
CDP-7.1-spark-3.2
CDP-7.1-spark-3.3
With these profiles it is easy to build Flowman to match your environment.
Building for specific Java Version#
If nothing else is set on the command line, Flowman will now build for Java 11 (except when building the profile
CDH-6.3, where Java 1.8 is used). If you are still stuck on Java 1.8, you can simply override the Java version by
specifying the property java.version
mvn install -Djava.version=1.8
Building for Open Source Hadoop and Spark#
Spark 2.4 and Hadoop 2.6:#
mvn clean install -Pspark-2.4 -Phadoop-2.6 -DskipTests
Spark 2.4 and Hadoop 2.7:#
mvn clean install -Pspark-2.4 -Phadoop-2.7 -DskipTests
Spark 2.4 and Hadoop 2.8:#
mvn clean install -Pspark-2.4 -Phadoop-2.8 -DskipTests
Spark 2.4 and Hadoop 2.9:#
mvn clean install -Pspark-2.4 -Phadoop-2.9 -DskipTests
Spark 3.0 and Hadoop 3.1#
mvn clean install -Pspark-3.0 -Phadoop-3.1 -DskipTests
Spark 3.0 and Hadoop 3.2#
mvn clean install -Pspark-3.0 -Phadoop-3.2 -DskipTests
Spark 3.1 and Hadoop 3.2#
mvn clean install -Pspark-3.1 -Phadoop-3.2 -DskipTests
Spark 3.2 and Hadoop 3.3#
mvn clean install -Pspark-3.2 -Phadoop-3.3 -Phadoop.version=3.3.1 -DskipTests
Spark 3.3 and Hadoop 3.3#
mvn clean install -Pspark-3.3 -Phadoop-3.3 -Phadoop.version=3.3.2 -DskipTests
Spark 3.4 and Hadoop 3.3#
mvn clean install -Pspark-3.4 -Phadoop-3.3 -Phadoop.version=3.3.4 -DskipTests
Building for Cloudera#
The Maven project also contains preconfigured profiles for Cloudera CDH 6.3 and for CDP 7.1 and also supports optional Spark 3.2 and Spark 3.3 parcels for CDP 7.1:
mvn clean install -PCDH-6.3 -DskipTests
mvn clean install -PCDP-7.1 -DskipTests
mvn clean install -PCDP-7.1-spark-3.2 -DskipTests
mvn clean install -PCDP-7.1-spark-3.3 -DskipTests
Building for AWS EMR#
The Maven project also contains preconfigured profiles for AWS EMR 6.12. Note that you should use Java 8 for building, since EMR will use Java 8 per default.
mvn clean install -PEMR-6.12 -DskipTests
Building for Azure Synapse#
Flowman also provides a build profile for Azure Synapse 3.3. Note that you should use Java 8 for building, since Synapse will use Java 8 per default.
mvn clean install -Psynapase-3.3 -DskipTests
Coverage Analysis#
Flowman also now supports creating a coverage analysis via the scoverage Maven plugin. It is not part of the default build and has to be triggered explicitly:
mvn scoverage:report
Building Documentation#
Flowman also contains Markdown documentation which is processed by Sphinx to generate the online HTML documentation.
cd docs
make html