Lab environnement Visualiser problem

adrien6910

Hello,

I have set up the lab but the Visualizer: Kubernetes Operational View does not display any information from my Kube cluster.

I tested on 4 browsers : Brave, Edge, Firefox and Chrome.

I noticed that the repository of the creator was here : https://codeberg.org/hjacobs/kube-ops-view
I tested but I can't get it to work.

Attached is a screenshot of the problem with the LAB version: https://github.com/schoolofdevops/kube-ops-view

It's like the Kubernetes Operational View POD can't talk to the kubernetes cluster to get the information

adrien6910

More detail :

It's in Lab 3. Setting Up Your Lab Environment --> Set Up the Visualiser

$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 20.04.6 LTS
Release: 20.04
Codename: focal

$ kubectl version
WARNING: This version information is deprecated and will be replaced with the output from kubectl version --short. Use --output=yaml|json to get the full version.
Client Version: version.Info{Major:"1", Minor:"27", GitVersion:"v1.27.1", GitCommit:"4c9411232e10168d7b050c49a1b59f6df9d7ea4b", GitTreeState:"clean", BuildDate:"2023-04-14T13:21:19Z", GoVersion:"go1.20.3", Compiler:"gc", Platform:"linux/amd64"}
Kustomize Version: v5.0.1
Server Version: version.Info{Major:"1", Minor:"26", GitVersion:"v1.26.3", GitCommit:"9e644106593f3f4aa98f8a84b23db5fa378900bd", GitTreeState:"clean", BuildDate:"2023-03-30T06:34:50Z", GoVersion:"go1.19.7", Compiler:"gc", Platform:"linux/amd64"}

luisviveropena

Hi @adrien6910, ok, thanks for the information. I'll take a look at this and will provide you an update.

Regards,
Luis.

adrien6910

$ flux version
flux: v2.0.0-rc.1
kustomize-controller: v1.0.0-rc.1
source-controller: v1.0.0-rc.1

$ kustomize version
v5.0.1

$ kind version
kind v0.18.0 go1.20.2 linux/amd64

luisviveropena

Hi @adrien6910, unfortunately I couldn't reproduce the issue on my system. It worked for me at the first try.

1.- Are you working locally in your system, in a VM or in a cloud system?

2.- I got the following when deployed the app:

kubectl apply -f kube-ops-view/deploy
serviceaccount/kube-ops-view created
clusterrole.rbac.authorization.k8s.io/kube-ops-view created
clusterrolebinding.rbac.authorization.k8s.io/kube-ops-view created
deployment.apps/kube-ops-view created
ingress.networking.k8s.io/kube-ops-view created
service/kube-ops-view created

==> Did you you get the last line, where it says that the service has been created?

3.- Do you see the node with port number 32000?

kubectl get pods,svc
NAME READY STATUS RESTARTS AGE
pod/kube-ops-view-866b7bf788-ljvxv 1/1 Running 0 22s

NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service/kube-ops-view NodePort 10.96.86.72 80:32000/TCP 22s
service/kubernetes ClusterIP 10.96.0.1 443/TCP 32m

Regards,
Luis.

adrien6910

1.- Are you working locally in your system, in a VM or in a cloud system?
I am using VM in cloud system (GCP)

2.- I got the following when deployed the app: Yes

Do you see the node with port number 32000?
Yes. The port is open and answers well, as you can see in my first sreenshot i can open Kubernetes Operation View 0.9.1interface but all is black and i don't have information about my cluster.

gouravshah

@adrien6910

This is an issue which I have seen happen with visualizer randomly. When it happens, there is no error emitted, and its not specific to any kind of environment either. This is a application bug with visualizer code(which is old), and in some cases it starts showing up the application after some time. I have attempted to do root cause analysis multiple times, with no avail so far. (For starters, you could start checking the logs from kube-ops-view-xxx pod).

Why do we still use it? Well, it works for most of the time, and when it does, its a very useful tool.

adrien6910

Hello,

It is not an essential tool but it helps visually.
I would do without it.

Do you have an alternative application?

Thank,

gouravshah

@adrien6910 I haven't found a good alternative to this yet. You may try deleting 'kubectl delete -f xxx' and then applying it again. At times it helps.

adrien6910

@gouravshah, I have try 'kubectl delete -f xxx' several time with the result after new apply. i have create an other VM too.

I would do without it.

luisviveropena

Hi @adrien6910,

Just in case, @gouravshah was referring to the following command:

kubectl delete -f kube-ops-view/deploy

Regards,
Luis.

adrien6910

Hi,

The problem came from my antivirus (F-Secure): after setting the URL to exception, the page content was displayed correctly.

Thank you for your help.
Adrien.

luisviveropena

Hi @adrien6910, it's good to know that you were able to find the fix!! And fortunately it wasn't related to the Kubernetes Operational View itself!!

Regards,
Luis.