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https://github.com/hausgold/docker-schema-registry
mDNS enabled confluentinc/cp-schema-registry image
https://github.com/hausgold/docker-schema-registry
docker docker-image kafka mdns oss schema-registry zeroconf
Last synced: about 1 month ago
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mDNS enabled confluentinc/cp-schema-registry image
- Host: GitHub
- URL: https://github.com/hausgold/docker-schema-registry
- Owner: hausgold
- License: mit
- Created: 2019-02-27T08:43:25.000Z (almost 6 years ago)
- Default Branch: master
- Last Pushed: 2024-10-21T06:43:28.000Z (2 months ago)
- Last Synced: 2024-10-21T09:39:16.961Z (2 months ago)
- Topics: docker, docker-image, kafka, mdns, oss, schema-registry, zeroconf
- Language: Shell
- Homepage: https://hub.docker.com/r/hausgold/schema-registry/
- Size: 59.6 KB
- Stars: 0
- Watchers: 11
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
[](https://github.com/hausgold/docker-schema-registry/actions/workflows/package.yml)
[](https://github.com/hausgold/docker-schema-registry)
[](https://hub.docker.com/r/hausgold/schema-registry/)
This Docker images provides the [confluentinc/cp-schema-registry](https://hub.docker.com/r/confluentinc/cp-schema-registry) image as base
with the mDNS/ZeroConf stack on top. So you can enjoy the app
while it is accessible by default as *schema-registry.local*. (Port 80)
- [Requirements](#requirements)
- [Getting starting](#getting-starting)
- [docker-compose usage example](#docker-compose-usage-example)
- [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 [Schema Registry](https://github.com/confluentinc/schema-registry)
service up and running create a `docker-compose.yml` and insert the following
snippet:
```yaml
version: "3"
services:
kafka:
image: hausgold/kafka
environment:
# Mind the .local suffix
- MDNS_HOSTNAME=kafka.local
ports:
# The ports are just for you to know when configure your
# container links, on depended containers
- "9092"
schema-registry:
image: hausgold/schema-registry
environment:
# Mind the .local suffix
MDNS_HOSTNAME: schema-registry.local
# Defaults to http://0.0.0.0:8081
SCHEMA_REGISTRY_LISTENERS: http://0.0.0.0:8081
# Defaults to kafka.local:9092
SCHEMA_REGISTRY_KAFKASTORE_BOOTSTRAP_SERVERS: kafka:9092
# Set the default Apache Avro schema compatibility
#
# See: http://bit.ly/2TcpoY1
# See: http://bit.ly/2Hfo4wj
SCHEMA_REGISTRY_AVRO_COMPATIBILITY_LEVEL: full
ports:
# The ports are just for you to know when configure your
# container links, on depended containers
- "80" # CORS-enabled nginx proxy to the schema-registry
- "8081" # direct access to the schema-registry (no CORS)
links:
- kafka
schema-registry-ui:
image: hausgold/schema-registry-ui:0.9.5
network_mode: bridge
environment:
MDNS_HOSTNAME: schema-registry-ui.local
SCHEMAREGISTRY_URL: http://schema-registry.local
```
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/schema-registry
```
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/schema-registry
```
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