run function gives 500

[sonalkr132]

Hi, I have deployed kubeless v0.6.0 and kubeless-ui on kubernetes 1.10. I created test.foobar function using quick-start. I can call the function from kubeless as mentioned in guide:

$ kubeless function call get-python --data '{"echo": "echo echo"}'
{"echo": "echo echo"}

However, when I try to run function using ui, I get nothing back. In browser console, I see response to POST http://<ui-pod-ip>:3000/proxy is 500 and request payload has following:

{url: "http://localhost:8080/api/v1/proxy/namespaces/kubeless/services/get-python:8080",…}
headers:{event-id: "ui-11ebb8bc32f0", event-time: "2018-04-24T14:42:21.809Z", event-type: "application/json",…}
Accept:"application/json"
Content-Type:"application/json"
X-Requested-With:"XMLHttpRequest"
event-id:"ui-11ebb8bc32f0"
event-namespace:"ui.kubeless.io"
event-time:"2018-04-24T14:42:21.809Z"
event-type:"application/json"
json:"{"hi":"d"}"
method:"post"
url:"http://localhost:8080/api/v1/proxy/namespaces/kubeless/services/get-python:8080"

I ran kubectl proxy -p 8080 locally and tried following:

 $ curl http://localhost:8080/api/v1/proxy/namespaces/kubeless/services/get-python
{
  "kind": "Status",
  "apiVersion": "v1",
  "metadata": {  },
  "status": "Failure",
  "message": "the server could not find the requested resource",
  "reason": "NotFound",
  "details": {  },
  "code": 404
}

is this url correct? As per kubernetes doc, shouldn't this be localhost:8080/api/v1/namespaces/kubeless/services/get-python:8080/proxy?

[andresmgot]

Hi @sonalkr132, did you run the UI using the manifest at?:

kubectl create -f https://raw.githubusercontent.com/kubeless/kubeless-ui/master/k8s.yaml

Also, how are you accessing the UI? By default it expose a NodePort that is the one that can be used to access the service.

Finally note that both URLs are correct:

$ curl 127.0.0.1:8080/api/v1/namespaces/default/services/get-python:8080/proxy/
hello world
$ curl 127.0.0.1:8080/api/v1/proxy/namespaces/default/services/get-python:8080/
hello world

[sonalkr132]

did you run the UI using the manifest at?:

yes, I used the same.

how are you accessing the UI?|

ui services exposes 3000 on host using NodePort as you mentioned. I am using <ui-host-ip>:3000 to access UI.

both URLs are correct:

can you please re-confirm this? I used following steps:

$ minikube start --kubernetes-version v1.10.0
$ kubectl config use-context minikube
$ export RELEASE=v0.6.0
$ kubectl create ns kubeless
$ kubectl create -f https://github.com/kubeless/kubeless/releases/download/$RELEASE/kubeless-non-rbac-$RELEASE.yaml
$ cat <<EOT >> test.py
def foobar(event, context):
  print event
  return event['data']
EOT
$ kubeless function deploy get-python --runtime python2.7  --from-file test.py   --handler test.foobar
$ kubectl proxy -p 8080 &
$ curl -L --data '{"Another": "Echo"}' \
>   --header "Content-Type:application/json" \
>   localhost:8080/api/v1/proxy/namespaces/default/services/get-python:8080/
{  "kind": "Status",
  "apiVersion": "v1",
  "metadata": {  },
  "status": "Failure",
  "message": "the server could not find the requested resource",
  "reason": "NotFound",
  "details": {  },
  "code": 404
}
$ curl --data '{"Another": "Echo"}'   --header "Content-Type:application/json"   localhost:8080/api/v1/namespaces/default/services/get-python:http-function-port/proxy/
{"Another": "Echo"}

[andresmgot]

Oh, it seems that it is a 1.10 change: kubernetes/kubernetes#59884 (I checked it in 1.9). Thanks for reporting this, I will update the UI.