Add Kubernetes Example to docs (#596)

nativelink-docs/docs/deployment-examples/Kubernetes-Deployment.mdx

@@ -0,0 +1,81 @@
+---
+title: Kubernetes Deployment (Experimental)
+description: 'See the capabilities of remote execution and cache'
+---
+
+# Kubernetes example
+
+This deployment sets up a 3-container deployment with separate CAS, scheduler
+and worker. Don't use this example deployment in production. It's insecure.
+
+In this example we're using `kind` to set up the cluster `cilium` to provide a
+`LoadBalancer` and `GatewayController`.
+
+First set up a local development cluster:
+
+```bash
+./00_infra.sh
+```
+
+Next start a few standard deployments. This part also builds the remote
+execution containers and makes them available to the cluster:
+
+```bash
+./01_operations.sh
+```
+
+Finally deploy NativeLink:
+
+```bash
+./02_application.sh
+```
+
+> [!TIP]
+> You can use `./03_delete_application.sh` to remove just the nativelink
+> deployments but leave the rest of the cluster intact.
+
+This demo setup creates two gateways to expose the `cas` and `scheduler`
+deployments via your local docker network:
+
+```bash
+CACHE=$(kubectl get gtw cache -o=jsonpath='{.status.addresses[0].value}')
+SCHEDULER=$(kubectl get gtw scheduler -o=jsonpath='{.status.addresses[0].value}')
+
+echo "Cache IP: $CACHE"
+echo "Scheduler IP: $SCHEDULER"
+
+# Prints something like:
+#
+# Cache IP: 172.20.255.4
+# Scheduler IP: 172.20.255.5
+```
+
+You can now pass these IPs to your bazel invocation to use the remote cache and
+executor:
+
+```bash
+bazel test \
+    --config=lre \
+    --remote_instance_name=main \
+    --remote_cache=grpc://$CACHE:50051
+    --remote_executore=grpc://$SCHEDULER:50052
+    //:dummy_test
+```
+
+> [!TIP]
+> You can add these flags to a to a `.bazelrc.user` file in the workspace root.
+> Note that you'll need to pass in explicit IPs as this file can't resolve
+> environment variables:
+> ```bash
+> # .bazelrc.user
+> build --config=lre
+> build --remote_instance_name=main
+> build --remote_cache=grpc://172.20.255.4:50051
+> build --remote_executor=grpc://172.20.255.5:50052
+> ```
+
+When you're done testing, delete the cluster:
+
+```bash
+kind delete cluster
+```