https://github.com/hausgold/docker-kafka
mDNS enabled wurstmeister/kafka image
https://github.com/hausgold/docker-kafka
docker docker-image kafka mdns oss zeroconf
Last synced: about 1 month ago
JSON representation
mDNS enabled wurstmeister/kafka image
- Host: GitHub
- URL: https://github.com/hausgold/docker-kafka
- Owner: hausgold
- License: mit
- Created: 2018-12-12T11:58:34.000Z (over 7 years ago)
- Default Branch: master
- Last Pushed: 2026-04-13T06:27:51.000Z (about 2 months ago)
- Last Synced: 2026-04-13T08:19:09.758Z (about 2 months ago)
- Topics: docker, docker-image, kafka, mdns, oss, zeroconf
- Language: Shell
- Homepage: https://hub.docker.com/r/hausgold/kafka/
- Size: 84 KB
- Stars: 0
- Watchers: 10
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
[](https://github.com/hausgold/docker-kafka/actions/workflows/package.yml)
[](https://github.com/hausgold/docker-kafka)
[](https://hub.docker.com/r/hausgold/kafka/)
This Docker images provides the
[apache/kafka](https://hub.docker.com/r/apache/kafka/) image as base with the
mDNS/ZeroConf stack on top. (2.x tags used
[wurstmeister/kafka](https://hub.docker.com/r/wurstmeister/kafka/), which
required Zookeeper) So you can enjoy [Apache Kafka](https://kafka.apache.org)
while it is accessible by default as *kafka.local* (Port 9092) as a single-node
cluster using KRaft without Zookeeper.
- [Requirements](#requirements)
- [Getting starting](#getting-starting)
- [Host configs](#host-configs)
- [Configure a different mDNS hostname](#configure-a-different-mdns-hostname)
- [Other top level domains](#other-top-level-domains)
- [Further reading](#further-reading)
## Requirements
* Host enabled Avahi daemon
* Host enabled mDNS NSS lookup
## Getting starting
To get a single broker Apache Kafka service up and running create a
`docker-compose.yml` and insert the following snippet (based on the [original
example](https://github.com/apache/kafka/blob/trunk/docker/examples/jvm/single-node/plaintext/docker-compose.yml)):
```yaml
services:
kafka:
image: hausgold/kafka
environment:
MDNS_HOSTNAME: kafka.local
# See: http://bit.ly/2UDzgqI for Kafka downscaling
KAFKA_HEAP_OPTS: -Xmx256M -Xms32M
ulimits:
# Due to systemd/pam RLIMIT_NOFILE settings (max int inside the
# container), the Java process seams to allocate huge limits which result
# in a +unable to allocate file descriptor table - out of memory+ error.
# Lowering this value fixes the issue for now.
#
# See: http://bit.ly/2U62A80
# See: http://bit.ly/2T2Izit
nofile:
soft: 100000
hard: 100000
```
Afterwards start the service with the following command:
```bash
$ docker-compose up
```
## Host configs
Install the nss-mdns package, enable and start the avahi-daemon.service. Then,
edit the file /etc/nsswitch.conf and change the hosts line like this:
```bash
hosts: ... mdns4_minimal [NOTFOUND=return] resolve [!UNAVAIL=return] dns ...
```
## Configure a different mDNS hostname
The magic environment variable is *MDNS_HOSTNAME*. Just pass it like that to
your docker run command:
```bash
$ docker run --rm -e MDNS_HOSTNAME=something.else.local hausgold/kafka
```
This will result in *something.else.local*.
You can also configure multiple aliases (CNAME's) for your container by
passing the *MDNS_CNAMES* environment variable. It will register all the comma
separated domains as aliases for the container, next to the regular mDNS
hostname.
```bash
$ docker run --rm \
-e MDNS_HOSTNAME=something.else.local \
-e MDNS_CNAMES=nothing.else.local,special.local \
hausgold/kafka
```
This will result in *something.else.local*, *nothing.else.local* and
*special.local*.
## Other top level domains
By default *.local* is the default mDNS top level domain. This images does not
force you to use it. But if you do not use the default *.local* top level
domain, you need to [configure your host avahi][custom_mdns] to accept it.
## Further reading
* Docker/mDNS demo: https://github.com/Jack12816/docker-mdns
* Archlinux howto: https://wiki.archlinux.org/index.php/avahi
* Ubuntu/Debian howto: https://wiki.ubuntuusers.de/Avahi/
[custom_mdns]: https://wiki.archlinux.org/index.php/avahi#Configuring_mDNS_for_custom_TLD