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    Lab environnement Visualiser problem

    Posts: 10
    edited May 2023 in LFS269 Class Forum

    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

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    Comments

    • Posts: 10

      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"}

    • Posts: 1,265

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

      Regards,
      Luis.

    • Posts: 10

      $ 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

    • Posts: 1,265

      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.

    • Posts: 10
      edited May 2023

      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.

    • Posts: 139

      @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.

    • Posts: 10

      Hello,

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

      Do you have an alternative application?

      Thank,

    • Posts: 139

      @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.

    • Posts: 10
      edited May 2023

      @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.

    • Posts: 1,265

      Hi @adrien6910,

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

      kubectl delete -f kube-ops-view/deploy

      Regards,
      Luis.

    • Posts: 10

      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.

    • Posts: 1,265

      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.

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