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What is Zabbix?
Zabbix is an enterprise-class open source distributed monitoring solution.
Zabbix is software that monitors numerous parameters of a network and the health and integrity of servers. Zabbix uses a flexible notification mechanism that allows users to configure e-mail based alerts for virtually any event. This allows a fast reaction to server problems. Zabbix offers excellent reporting and data visualisation features based on the stored data. This makes Zabbix ideal for capacity planning.
For more information and related downloads for Zabbix components, please visit https://hub.docker.com/u/zabbix/ and https://zabbix.com
What is Zabbix Java Gateway?
Zabbix Java Gateway performs native support for monitoring JMX applications. Java gateway accepts incoming connection from Zabbix server or Zabbix proxy and can only be used as a "passive proxy".
Zabbix Java Gateway images
These are the only official Zabbix Java Gateway Docker images. They are based on Alpine Linux v3.12, Ubuntu 20.04 (focal), 22.04 (noble), CentOS Stream 8 and Oracle Linux 8 images. The available versions of Zabbix Java Gateway are:
Zabbix Java Gateway 4.0 (tags: alpine-4.0-latest, ubuntu-4.0-latest, centos-4.0-latest)
Zabbix Java Gateway 4.0.* (tags: alpine-4.0.*, ubuntu-4.0.*, centos-4.0.*)
Zabbix Java Gateway 5.0 (tags: alpine-5.0-latest, ubuntu-5.0-latest, ol-5.0-latest)
Zabbix Java Gateway 5.0.* (tags: alpine-5.0.*, ubuntu-5.0.*, ol-5.0.*)
Zabbix Java Gateway 6.0 (tags: alpine-6.0-latest, ubuntu-6.0-latest, ol-6.0-latest)
Zabbix Java Gateway 6.0.* (tags: alpine-6.0.*, ubuntu-6.0.*, ol-6.0.*)
Zabbix Java Gateway 6.2 (tags: alpine-6.2-latest, ubuntu-6.2-latest, ol-6.2-latest, alpine-latest, ubuntu-latest, ol-latest, latest)
Zabbix Java Gateway 6.2.* (tags: alpine-6.2.*, ubuntu-6.2.*, ol-6.2.*)
Zabbix Java Gateway 6.4 (tags: alpine-trunk, ubuntu-trunk, ol-trunk)
Images are updated when new releases are published. The image with latest tag is based on Alpine Linux.
How to use this image
Start zabbix-java-gateway
Start a Zabbix Java Gateway container as follows:
docker run --name some-zabbix-java-gateway -d zabbix/zabbix-java-gateway:tag
Where some-zabbix-java-gateway is the name you want to assign to your container and tag is the tag specifying the version you want. See the list above for relevant tags, or look at the full list of tags.
Linking the container to Zabbix server or Zabbix proxy
docker run --name some-zabbix-java-gateway --link some-zabbix-server:zabbix-server -d zabbix/zabbix-java-gateway:tag
Container shell access and viewing Zabbix Java Gateway logs
The docker exec command allows you to run commands inside a Docker container. The following command line will give you a bash shell inside your zabbix-java-gateway container:
$ docker exec -ti some-zabbix-java-gateway /bin/bash
The Zabbix Java Gateway log is available through Docker's container log:
$ docker logs some-zabbix-java-gateway
Environment Variables
When you start the zabbix-java-gateway image, you can adjust the configuration of the Zabbix Java Gateway by passing one or more environment variables on the docker run command line.
ZBX_START_POLLERS
This variable is specified amount of pollers. By default, value is 5.
ZBX_TIMEOUT
This variable is used to specify timeout for outgoing connections. By default, value is 3.
ZBX_DEBUGLEVEL
This variable is used to specify log level. By default, value is info. The variable allows next values: trace, debug, info, want, error, all, off
ZBX_PROPERTIES_FILE
Name of properties file. Can be used to set additional properties using a key-value format in such a way that they are not visible on a command line or to overwrite existing ones.
ZABBIX_OPTIONS
Additional arguments for Zabbix Java Gateway. Useful to enable additional libraries and features.
Allowed volumes for the Zabbix Java Gateway container
/usr/sbin/zabbix_java/ext_lib
The volume allows include additional JAR files to extend allowed protocols for Zabbix Java Gateway.
The image variants
The zabbix-java-gateway images come in many flavors, each designed for a specific use case.
zabbix-java-gateway:alpine-<version>
This image is based on the popular Alpine Linux project, available in the alpine official image. Alpine Linux is much smaller than most distribution base images (~5MB), and thus leads to much slimmer images in general.
This variant is highly recommended when final image size being as small as possible is desired. The main caveat to note is that it does use musl libc instead of glibc and friends, so certain software might run into issues depending on the depth of their libc requirements. However, most software doesn't have an issue with this, so this variant is usually a very safe choice. See this Hacker News comment thread for more discussion of the issues that might arise and some pro/con comparisons of using Alpine-based images.
To minimize image size, it's uncommon for additional related tools (such as git or bash) to be included in Alpine-based images. Using this image as a base, add the things you need in your own Dockerfile (see the alpine image description for examples of how to install packages if you are unfamiliar).
zabbix-java-gateway:ubuntu-<version>
This is the defacto image. If you are unsure about what your needs are, you probably want to use this one. It is designed to be used both as a throw away container (mount your source code and start the container to start your app), as well as the base to build other images off of.
zabbix-java-gateway:ol-<version>
Oracle Linux is an open-source operating system available under the GNU General Public License (GPLv2). Suitable for general purpose or Oracle workloads, it benefits from rigorous testing of more than 128,000 hours per day with real-world workloads and includes unique innovations such as Ksplice
Supported Docker versions
This image is officially supported on Docker version 1.12.0.
Support for older versions (down to 1.6) is provided on a best-effort basis.
Please see the Docker installation documentation for details on how to upgrade your Docker daemon.
User Feedback
Documentation
Documentation for this image is stored in the java-gateway/ directory of the zabbix/zabbix-docker GitHub repo. Be sure to familiarize yourself with the repository's README.md file before attempting a pull request.
Issues
If you have any problems with or questions about this image, please contact us through a GitHub issue.
Known issues
Contributing
You are invited to contribute new features, fixes, or updates, large or small; we are always thrilled to receive pull requests, and do our best to process them as fast as we can.
Before you start to code, we recommend discussing your plans through a GitHub issue, especially for more ambitious contributions. This gives other contributors a chance to point you in the right direction, give you feedback on your design, and help you find out if someone else is working on the same thing.