Error executing simple gameserver tutorial (node.js)

[fooock]

What happened:

Trying to test the simple gameserver tutorial:

$ kubectl create -f https://raw.githubusercontent.com/googleforgames/agones/release-1.5.0/examples/nodejs-simple/gameserver.yaml
gameserver.agones.dev/nodejs-simple-7tzq5 created

Now I try to retrieve GAMESERVER_NAME:

$ GAMESERVER_NAME=$(kubectl get gs -o go-template --template '{{range .items}}{{.metadata.name}}{{"\n"}}{{end}}')
Error from server (NotFound): gameservers.agones.dev ".items}}{{.metadata.name}}{{\"\\n\"}}{{end}}" not found

What you expected to happen:

Command GAMESERVER_NAME=$(kubectl get gs -o go-template --template '{{range .items}}{{.metadata.name}}{{"\n"}}{{end}}') finishes successfully.

How to reproduce it (as minimally and precisely as possible):

Follow steps from this tutorial

Anything else we need to know?:

Running in WSL.

Environment:

• Agones version: Master branch (commit d46cba80156e86002b4097856702378c97bbfef6)
• Kubernetes version (use kubectl version):

$ kubectl version
Client Version: version.Info{Major:"1", Minor:"18", GitVersion:"v1.18.0", GitCommit:"9e991415386e4cf155a24b1da15becaa390438d8", GitTreeState:"clean", Bui
ldDate:"2020-03-25T14:58:59Z", GoVersion:"go1.13.8", Compiler:"gc", Platform:"windows/amd64"}
Server Version: version.Info{Major:"1", Minor:"15", GitVersion:"v1.15.10", GitCommit:"1bea6c00a7055edef03f1d4bb58b773fa8917f11", GitTreeState:"clean", Bu
ildDate:"2020-02-11T20:05:26Z", GoVersion:"go1.12.12", Compiler:"gc", Platform:"linux/amd64"}

• Cloud provider or hardware configuration: Minikube
• Install method (yaml/helm): yaml
• Troubleshooting guide log(s):
• Others:

The example works as expected if no using the failing step.
Maybe tutorials in Rust and C++ also fails (don't tested)

[yeslayla]

As of release, 1.10.0, I was able to run this without issue. My testing environment was minikube on WSL.

jmanley@windows:/mnt/c/Users/jmanley/Projects$ kubectl get gs
No resources found in default namespace.
jmanley@windows:/mnt/c/Users/jmanley/Projects$ kubectl create -f https://raw.githubusercontent.com/googleforgames/agones/release-1.10.0/examples/nodejs-simple/gameserver.yaml
gameserver.agones.dev/nodejs-simple-krxgm created
jmanley@windows:/mnt/c/Users/jmanley/Projects$ kubectl get gs
NAME                  STATE       ADDRESS        PORT   NODE             AGE
nodejs-simple-krxgm   Scheduled   192.168.65.3   7117   docker-desktop   3s
jmanley@windows:/mnt/c/Users/jmanley/Projects$ GAMESERVER_NAME=$(kubectl get gs -o go-template --template '{{range .items}}{{.metadata.name}}{{"\n"}}{{end}}')
jmanley@windows:/mnt/c/Users/jmanley/Projects$ echo $GAMESERVER_NAME
nodejs-simple-krxgm
jmanley@windows:/mnt/c/Users/jmanley/Projects$ kubectl logs ${GAMESERVER_NAME} nodejs-simple -f

> @ start /home/server/examples/nodejs-simple
> node src/index.js

Connecting to the SDK server...
...connected to SDK server
Running for 10 seconds
Setting a label
GameServer Update:
        name: nodejs-simple-krxgm
        state: Scheduled
        labels: agones.dev/sdk-test-label,test-value
        annotations: agones.dev/sdk-version,1.10.0
^C
jmanley@windows:/mnt/c/Users/jmanley/Projects$ kubectl logs ${GAMESERVER_NAME} nodejs-simple -f

> @ start /home/server/examples/nodejs-simple
> node src/index.js

Connecting to the SDK server...
...connected to SDK server
Running for 10 seconds
Setting a label
GameServer Update:
        name: nodejs-simple-krxgm
        state: Scheduled
        labels: agones.dev/sdk-test-label,test-value
        annotations: agones.dev/sdk-version,1.10.0
Running for 20 seconds
Health ping sent
Setting an annotation
GameServer Update:
        name: nodejs-simple-krxgm
        state: Scheduled
        labels: agones.dev/sdk-test-label,test-value
        annotations: agones.dev/sdk-test-annotation,test value & agones.dev/sdk-version,1.10.0

After 120 seconds, the server does shutdown which could cause the return to be null.

jmanley@windows:/mnt/c/Users/jmanley/Projects$ GAMESERVER_NAME=$(kubectl get gs -o go-template --template '{{range .items}}{{.metadata.name}}{{"\n"}}{{end}}')
jmanley@windows:/mnt/c/Users/jmanley/Projects$ echo $GAMESERVER_NAME

---

I also tested this with release 1.5.0 of the template.

jmanley@windows:/mnt/c/Users/jmanley/Projects$ kubectl create -f https://raw.githubusercontent.com/googleforgames/agones/release-1.5.0/examples/nodejs-simple/gameserver.yaml
gameserver.agones.dev/nodejs-simple-c9dnb created

jmanley@windows:/mnt/c/Users/jmanley/Projects$ GAMESERVER_NAME=$(kubectl get gs -o go-template --template '{{range .items}}{{.metadata.name}}{{"\n"}}{{end}}')

jmanley@windows:/mnt/c/Users/jmanley/Projects$ echo $GAMESERVER_NAME
nodejs-simple-c9dnb

This was all done in a bash terminal.

---

If anyone past, present, or future is having issues, it's possible your terminal might be trying to parse the template before the server can do so.

I was able to run that command properly with bash.

jmanley@windows:/mnt/c/Users/jmanley/Projects$ bash --version
GNU bash, version 5.0.17(1)-release (x86_64-pc-linux-gnu)

An alternative command for the same result with jsonpath would be:

GAMESERVER_NAME=$(kubectl get gs -o jsonpath='{.items[0].metadata.name}')`

[markmandel]

Thanks for testing this! I will close this issue then!