Adding a README.md file for the simple-udp to help developer to get start

README.md

@@ -44,6 +44,7 @@ Documentation and usage guides on how to develop and host dedicated game servers
 ### Quickstarts:
  - [Create a Game Server](./docs/create_gameserver.md)
  - [Create a Game Server Fleet](./docs/create_fleet.md)
+ - [Edit Your First Game Server (Go)](./docs/edit_first_game_server.md)
 
 ### Guides
  - [Integrating the Game Server SDK](sdks)

docs/edit_first_game_server.md

@@ -0,0 +1,96 @@
+# Getting Started
+The following guide is for developers without Docker or Kubernetes experience, that want to use the simple-udp example as a starting point for a custom game server. Since this guide is for Google Kubernetes Engine, we welcome a Pull Request to expand this to include Minikube as well.
+
+## Prerequisites
+
+1. Downland and install Golang from https://golang.org/dl/.
+2. Install Docker from https://www.docker.com/get-docker.
+3. Follow the install instructions (if you haven't already) at [Install and configure Agones on Kubernetes](../install/README.md). At least, you should have "Setting up a Google Kubernetes Engine (GKE) cluster", "Enabling creation of RBAC resources" and "Installing Agones" done.
+
+## Modify the code and push another new image
+
+### Modify the source code
+Modify the main.go file. For example:
+
+Change main.go line 92:
+
+From:
+```go
+ack := "ACK: " + txt + "\n"
+```
+
+To:
+```go
+ack := "ACK: Hi," + txt + "\n"
+```
+
+
+### Build Server
+Since Docker image is using Alpine Linux, the "go build" command has to include few more environment variables.
+
+```bash
+go get agones.dev/agones/pkg/sdk
+GOOS=linux GOARCH=amd64 CGO_ENABLED=0 go build -o bin/server -a -v main.go
+```
+
+## Using Docker File without using Minikube
+
+### Create a new docker image
+```bash
+docker build -t gcr.io/[PROJECT_ID]/agones-udp-server:0.2 .
+```
+Note that: you can change the image name "agones-udp-server" to something else.
+
+### Push the image to GCP Registry
+```bash
+docker push gcr.io/[PROJECT_ID]/agones-udp-server:0.2
+```
+
+### Modify gameserver.yaml
+Modify the following line from gameserver.yaml to use the new configuration.
+
+```
+    spec:
+      containers:
+      - name: agones-simple-udp
+        image: gcr.io/[PROJECT_ID]/agones-udp-server:0.2
+```
+
+### Deploy Server
+Apply the latest settings to kubernetes container.
+
+```bash
+>> gcloud config set container/cluster [CLUSTER_NAME]
+>> gcloud container clusters get-credentials [CLUSTER_NAME]
+>> kubectl apply -f gameserver.yaml
+```
+### Check the GameServer Status
+```bash
+>> kubectl describe gameserver
+```
+
+### Verify
+Follow the instruction from this link: https://github.com/GoogleCloudPlatform/agones/blob/master/docs/create_gameserver.md.
+
+Let's retrieve the IP address and the allocated port of your Game Server :
+
+```
+kubectl get gs simple-udp -o jsonpath='{.status.address}:{.status.port}'
+```
+
+You can now communicate with the Game Server :
+
+> NOTE: if you do not have netcat installed
+  (i.e. you get a response of `nc: command not found`),
+  you can install netcat by running `sudo apt install netcat`.
+
+```
+nc -u {IP} {PORT}
+Hello World !
+ACK: Hello World !
+EXIT
+```
+
+You can finally type `EXIT` which tells the SDK to run the [Shutdown command](../sdks#shutdown), and therefore shuts down the `GameServer`.  
+
+If you run `kubectl describe gameserver` again - either the GameServer will be gone completely, or it will be in `Shutdown` state, on the way to being deleted.

examples/simple-udp/server/README.md

@@ -0,0 +1 @@
+To learn how to deploy your edited version of go server to gcp, please check out this link: [Edit Your First Game Server (Go)](../../../docs/edit_first_game_server.md)