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Docker Build

docker-jmeter

Docker image for Apache JMeter. This Docker image can be run as the jmeter command. Find Images of this repo on Docker Hub.

Building

With the script build.sh the Docker image can be build from the Dockerfile but this is not really necessary as you may use your own docker build commandline.

Build Options

Build argumments (see build.sh) with default values if not passed to build:

  • JMETER_VERSION - JMeter version, default 3.3
  • IMAGE_TIMEZONE - timezone of Docker image, default "Europe/Amsterdam"

NB IMAGE_TIMEZONE setting is not working yet.

Running

The Docker image will accept the same parameters as jmeter itself, assuming you run JMeter non-GUI with -n.

There is a shorthand run.sh command. See test.sh for an example of how to call run.sh.

User Defined Variables

This is a standard facility of JMeter: settings in a JMX test script may be defined symbolically and substituted at runtime via the commandline. These are called JMeter User Defined Variables or UDVs.

See test.sh and the trivial test plan for an example of UDVs passed to the Docker image via run.sh.

See also: http://blog.novatec-gmbh.de/how-to-pass-command-line-properties-to-a-jmeter-testplan/

Specifics

The Docker image built from the Dockerfile inherits from the Alpine Linux distribution:

"Alpine Linux is built around musl libc and busybox. This makes it smaller and more resource efficient than traditional GNU/Linux distributions. A container requires no more than 8 MB and a minimal installation to disk requires around 130 MB of storage. Not only do you get a fully-fledged Linux environment but a large selection of packages from the repository."

See https://hub.docker.com/_/alpine/ for Alpine Docker images.

The Docker image will install (via Alpine apk) several required packages most specificly the OpenJDK Java JRE. JMeter is installed by simply downloading/unpacking a .tgz archive from http://mirror.serversupportforum.de/apache/jmeter/binaries within the Docker image.

A generic entrypoint.sh is copied into the Docker image and will be the script that is run when the Docker container is run. The entrypoint.sh simply calls jmeter passing all argumets provided to the Docker container, see run.sh script:

sudo docker run --name ${NAME} -i -v ${WORK_DIR}:${WORK_DIR} -w ${WORK_DIR} ${IMAGE} $@

Credits

Thanks to https://github.com/hauptmedia/docker-jmeter and https://github.com/hhcordero/docker-jmeter-server for providing the Dockerfiles that inspired me.

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Docker image for Apache JMeter

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