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Routes Minecraft client connections to backend servers based upon the requested server address
.circleci | ||
cmd/mc-router | ||
docs | ||
mcproto | ||
server | ||
.gitignore | ||
.goreleaser.yml | ||
Dockerfile | ||
go.mod | ||
go.sum | ||
LICENSE.txt | ||
Makefile | ||
README.md |
Routes Minecraft client connections to backend servers based upon the requested server address.
Usage
Flags:
--help Show context-sensitive help (also try --help-long
and --help-man).
--port=25565 The port bound to listen for Minecraft client
connections
--api-binding=API-BINDING The host:port bound for servicing API requests
--mapping=MAPPING ... Mapping of external hostname to internal server
host:port
REST API
GET /routes
Retrieves the currently configured routesPOST /routes
Registers a route given a JSON body structured like:
{
"serverAddress": "CLIENT REQUESTED SERVER ADDRESS",
"backend": "HOST:PORT"
}
DELETE /routes/{serverAddress}
Deletes an existing route for the givenserverAddress
Using kubernetes service auto-discovery
When running mc-router
as a kubernetes pod and you pass the --in-kube-cluster
command-line argument, then
it will automatically watch for any services annotated with mc-router.itzg.me/externalServerName
. The value
of the annotation will be registered as the external hostname Minecraft clients would used to connect to the
routed service. The service's clusterIP and target port are used as the routed backend.
For example, start mc-router
's container spec with
image: itzg/mc-router
name: mc-router
args: ["--in-kube-cluster"]
and configure the backend minecraft server's service with the annotation:
apiVersion: v1
kind: Service
metadata:
name: mc-forge
annotations:
"mc-router.itzg.me/externalServerName": "external.host.name"
Example kubernetes deployment
- Declares an
mc-router
service that exposes a node port 25565 - Declares a service account with access to watch and list services
- Declares
--in-kube-cluster
in themc-router
container arguments - Two "backend" Minecraft servers are declared each with an
"mc-router.itzg.me/externalServerName"
annotation that declares their external server name
kubectl apply -f https://raw.githubusercontent.com/itzg/mc-router/master/docs/k8s-example-auto.yaml
Notes
- This deployment assumes two persistent volume claims:
mc-stable
andmc-snapshot
- I extended the allowed node port range by adding
--service-node-port-range=25000-32767
to/etc/kubernetes/manifests/kube-apiserver.yaml