18.1. Installing GeoMesa Kafka¶
GeoMesa currently supports Kafka version 0.10.x or later, and has been tested up to 2.7.0. However, not all features are supported for versions prior to 1.0. The runtime classpath requires Kafka version 2+, but should be compatible with brokers back to Kafka 0.10.
18.1.1. Installing from the Binary Distribution¶
GeoMesa Kafka artifacts are available for download or can be built from source. The easiest way to get started is to download the most recent binary version (3.2.2) from GitHub.
Extract it somewhere convenient:
# download and unpackage the most recent distribution: $ wget "https://github.com/locationtech/geomesa/releases/download/geomesa_2.11-$VERSION/geomesa-kafka_2.11-$VERSION-bin.tar.gz" $ tar xzvf geomesa-kafka_2.11-$VERSION-bin.tar.gz $ cd geomesa-kafka_2.11-$VERSION $ ls bin/ conf/ dist/ docs/ examples/ lib/ LICENSE.txt
18.1.2. Building from Source¶
GeoMesa Kafka may also be built from source. For more information refer to Building from Source
in the developer manual, or to the
README.md file in the the source distribution.
The remainder of the instructions in this chapter assume the use of the binary GeoMesa distribution.
If you have built from source, the Kafka distribution is created in the
target directory of the
More information about developing with GeoMesa may be found in the Developer Manual.
18.1.3. Setting up the Kafka Command Line Tools¶
GeoMesa comes with a set of command line tools for managing Kafka features. In the Kafka distribution the
tools are located in
If the environment variables
ZOOKEEPER_HOME are set, then GeoMesa will load the appropriate
JARs and configuration files from those locations and no further configuration is required. Otherwise, you will
be prompted to download the appropriate JARs the first time you invoke the tools. Environment variables can be
conf/*-env.sh and dependency versions can be specified in
GeoMesa also provides the ability to add additional JARs to the classpath using the environmental variable
$GEOMESA_EXTRA_CLASSPATHS. GeoMesa will prepend the contents of this environmental variable to the computed
classpath, giving it highest precedence in the classpath. Users can provide directories of jar files or individual
files using a colon (
:) as a delimiter. These entries will also be added the the map-reduce libjars variable.
Due to licensing restrictions, dependencies for shape file support must be separately installed. Do this with the following command:
Test the command that invokes the GeoMesa Tools:
$ geomesa-kafka Usage: geomesa-kafka [command] [command options] Commands: ...
18.1.4. Installing GeoMesa Kafka in GeoServer¶
See GeoServer Versions to ensure that GeoServer is compatible with your GeoMesa version.
220.127.116.11. Installing GeoServer¶
As described in section GeoMesa and GeoServer, GeoMesa implements a GeoTools-compatible data store. This makes it possible to use GeoMesa Kafka as a data store in GeoServer. GeoServer’s web site includes installation instructions for GeoServer.
After GeoServer is running, you will also need to install the WPS plugin to your GeoServer instance. The GeoServer WPS Plugin must match the version of GeoServer instance. The GeoServer website includes instructions for downloading and installing the WPS plugin.
If using Tomcat as a web server, it will most likely be necessary to pass some custom options:
export CATALINA_OPTS="-Xmx8g -XX:MaxPermSize=512M -Duser.timezone=UTC \ -server -Djava.awt.headless=true"
The value of
-Xmx should be as large as your system will permit; this
is especially important for the Kafka plugin. Be sure to restart Tomcat for changes to take place.
18.104.22.168. Installing the GeoMesa Kafka Data Store¶
To install the GeoMesa data store, extract the contents of the
geomesa-kafka-gs-plugin_2.11-$VERSION-install.tar.gz file in
in the binary distribution or
geomesa-kafka/geomesa-kafka-gs-plugin/target/ in the source
distribution into your GeoServer’s
$ tar -xzvf \ geomesa-kafka_2.11-$VERSION/dist/gs-plugins/geomesa-kafka-gs-plugin_2.11-$VERSION-install.tar.gz \ -C /path/to/geoserver/webapps/geoserver/WEB-INF/lib
Next, install the JARs for Kafka and Zookeeper. By default, JARs will be downloaded from Maven central. You may
override this by setting the environment variable
GEOMESA_MAVEN_URL. If you do no have an internet connection
you can download the JARs manually via http://search.maven.org/.
Edit the file
geomesa-kafka_2.11-$VERSION/conf/dependencies.sh to set the versions of Kafka and Zookeeper
to match the target environment, and then run the script:
$ ./bin/install-dependencies.sh /path/to/geoserver/webapps/geoserver/WEB-INF/lib
GeoMesa 3.2.2 depends on Scala 2.11, so you should make sure you use the
Kafka version built with Scala 2.11 as well (
kafka_2.11_*) to avoid
The specific JARs needed for some common configurations are listed below:
Restart GeoServer after the JARs are installed.