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Change quickstart example README.md to point to docs. (#800)
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markmandel authored Sep 28, 2023
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45 changes: 2 additions & 43 deletions examples/agones-xonotic-sidecar/README.md
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# Agones & Xonotic Example
# Agones & Xonotic via Sidecar Example

An example of running [Xonotic](https://xonotic.org/) with Quilkin on an [Agones](https://agones.dev/) cluster,
utilising the sidecar integration pattern.

To interact with the demo, you will need to download the Xonotic client.

## Sidecar with no filter

Run `kubectl apply -f ./sidecar.yaml`
to create a Fleet of Xonotic dedicated game servers, with traffic processed through a Quilkin sidecar proxy.

This is particularly useful if you want to take advantage of the inbuilt metrics that Quilkin provides without
having to alter your dedicated game server.

Since the configuration is so simple, we don't need a configuration file and can utilise the command line arguements.

Connect to the Agones hosted Xonotic server via the "Multiplayer > Address" field in the Xonotic client.

## Sidecar with compression filter

Run `kubectl apply -f ./sidecar-compress.yaml`
to create a Fleet of Xonotic dedicated game servers, with traffic processed through a Quilkin sidecar proxy,
that is configured to decompress UDP traffic with the [Snappy](https://crates.io/crates/snap)
compression format.

Since this is a more complex configuration, we provide a Quilkin a yaml configuration file through a `ConfigMap`
stored on the cluster.

Instead of connecting Xonotic directly, take the IP and port from the Agones hosted dedicated server, and replace the
`${GAMESERVER_IP}` and `${GAMESERVER_PORT}` values in a local copy of `client-compress.yaml`. Run this configuration
locally as:

`quilkin -c ./client-compress.yaml run`

From there connect to the local client proxy on "127.0.0.1:7000" via the "Multiplayer > Address" field in the
Xonotic client, and Quilkin will take care of compressing the data for you without having to change either the
client or the dedicated game server.

## Metrics

The Quilkin sidecars are also annotated with the
[appropriate Prometheus annotations](https://github.com/prometheus-community/helm-charts/tree/main/charts/prometheus#scraping-pod-metrics-via-annotations)
to inform Prometheus on how to scrape the Quilkin proxies for metrics.
This is the code example for the "Quickstart: Quilkin with Agones and Xonotic (Sidecar)" Guide, linked via the homepage.
112 changes: 2 additions & 110 deletions examples/agones-xonotic-xds/README.md
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# Agones & Xonotic Example
# Agones & Xonotic via xDS Provider Example

An example of running [Xonotic](https://xonotic.org/) with Quilkin on an [Agones](https://agones.dev/) cluster,
utlising the Quilkin xDS Agones provider, with a TokenRouter to provide routing and access control to the
allocated `GameServer` instance.

To interact with the demo, you will need to download the Xonotic client and an existing Agones Kubernetes cluster.

## Installation on the Cluster

To install Quilkin as an Agones integrated xDS control plane, we can create a deployment of Quilkin running in
`manage agones` mode, with the appropriate permissions.

```shell
$ kubectl apply -f ./xds-control-plane.yaml
configmap/quilkin-xds-filter-config created
serviceaccount/quilkin-agones created
clusterrole.rbac.authorization.k8s.io/quilkin-agones created
rolebinding.rbac.authorization.k8s.io/quilkin-agones created
deployment.apps/quilkin-manage-agones created
service/quilkin-manage-agones created
$ kubectl get pods
NAME READY STATUS RESTARTS AGE
quilkin-manage-agones-68b47457d4-42fxl 1/1 Running 0 3s
```

This also creates an internal `Service` endpoint for our Quilkin proxy instances to connect to named
`quilkin-manage-agones`.

To install the Quilkin Proxy pool which connects to the above xDS provider, we can split up a Deployment of Quilkin
instances that point to the aforementioned Service, like so:

```shell
$ kubectl apply -f ./proxy-pool.yaml
deployment.apps/quilkin-proxies created
service/quilkin-proxies created
$ kubectl get pods
NAME READY STATUS RESTARTS AGE
quilkin-manage-agones-68b47457d4-42fxl 1/1 Running 0 20m
quilkin-proxies-7448987cfb-6kbsz 1/1 Running 0 3s
quilkin-proxies-7448987cfb-p6krc 1/1 Running 0 3s
quilkin-proxies-7448987cfb-s9gxz 1/1 Running 0 3s
```

We can now see that we have 3 proxies running alongside and connected to our xDS provider.

## Create the `Fleet`

Next, create the `Fleet` of Xonotic `GameServer` instances:

```shell
$ kubectl apply -f ./fleet.yaml
fleet.agones.dev/xonotic created
$ kubectl get gameservers # run until they are Ready
NAME STATE ADDRESS PORT NODE AGE
xonotic-d7rfx-55j7q Ready 34.168.170.51 7226 gke-agones-default-534a3f8d-ifpc 34s
xonotic-d7rfx-nx7xr Ready 34.168.170.51 7984 gke-agones-default-534a3f8d-ifpc 34s
xonotic-d7rfx-sn5d6 Ready 34.168.170.51 7036 gke-agones-default-534a3f8d-ifpc 34s
```

To let the Quilkin xDS provider know what token will route to which `GameServer` we need to apply the
`quilkin.dev/tokens` annotation to an allocated `GameServer`, with the token content as its value - so let's create
an allocation, and apply the annotation all in one go!

```shell
$ kubectl create -f ./gameserverallocation.yaml
gameserverallocation.allocation.agones.dev/xonotic-d7rfx-nx7xr created
$ kubectl get gs
NAME STATE ADDRESS PORT NODE AGE
xonotic-d7rfx-55j7q Allocated 34.168.170.51 7226 gke-agones-default-534a3f8d-ifpc 23m
xonotic-d7rfx-nx7xr Ready 34.168.170.51 7984 gke-agones-default-534a3f8d-ifpc 23m
xonotic-d7rfx-sn5d6 Ready 34.168.170.51 7036 gke-agones-default-534a3f8d-ifpc 23m
```

> Don't do this more than once, as then multiple allocated `GameServers` will have the same routing token!
## Connecting Client Side

Instead of connecting to Xonotic or an Agones `GameServer` directly, we'll want to grab the IP and exposed port of
the `Service` that fronts all our Quilkin proxies:

```shell
$ kubectl get service quilkin-proxies
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
quilkin-proxies LoadBalancer 10.109.0.12 35.246.94.14 7000:30174/UDP 3h22m
```

We then take the EXTERNAL-IP and port from the `quilkin-proxies` service, and replace the`${LOADBALANCER_IP}`
with it in `client-token.yaml`.

Run this configuration locally as:

```shell
$ quilkin -c ./client-token.yaml proxy
{"timestamp":"2022-10-07T22:10:47.257635Z","level":"INFO","fields":{"message":"Starting Quilkin","version":"0.4.0-dev","commit":"c77260a2526542c564829a2c66935c60f00adcd2"},"target":"quilkin::cli"}
{"timestamp":"2022-10-07T22:10:47.258273Z","level":"INFO","fields":{"message":"Starting","port":7000,"proxy_id":"markmandel45"},"target":"quilkin::proxy"}
{"timestamp":"2022-10-07T22:10:47.258321Z","level":"INFO","fields":{"message":"Starting admin endpoint","address":"[::]:9092"},"target":"quilkin::admin"}
{"timestamp":"2022-10-07T22:10:47.258812Z","level":"INFO","fields":{"message":"Quilkin is ready"},"target":"quilkin::proxy"}
```

Now connect to the local client proxy on "127.0.0.1:7000" via the "Multiplayer > Address" field in the
Xonotic client, and Quilkin will take care of appending the routing token to all your UDP packets, which the Quilkin
proxies will route to the Allocated GameServer, and you can play a gamee!

...And you didn't have to change the client or the dedicated game server 🤸

## Metrics

The Quilkin instances are also annotated with the
[appropriate Prometheus annotations](https://github.com/prometheus-community/helm-charts/tree/main/charts/prometheus#scraping-pod-metrics-via-annotations)
to inform Prometheus on how to scrape the Quilkin proxies for metrics.
This is the code example for the "Quickstart: Quilkin with Agones and Xonotic (xDS)" Guide, linked via the homepage.
3 changes: 1 addition & 2 deletions examples/quilkin-filter-example/README.md
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# Quilkin filter example

This crate contains the code example on how to [add filters to Quilkin](https://github.com/googleforgames/quilkin/blob/main/docs/extensions/filters/writing_custom_filters.md)

This is the code example for the "Writing Custom Filters" Guide, linked via the homepage.

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