topic "Missing host information" message at Overview of workload section when monitoring kubernetes in Container platforms

Re: "Missing host information" message at Overview of workload section when monitoring kubernetes

MariettaAlmeida — Mon, 04 Sep 2023 06:42:50 GMT

Hi @DanielS which deployment option should i use? used the operator installation from the wizard on deploy oneagent on kubernetes/openshift

"Missing host information" message at Overview of workload section when monitoring kubernetes

MariettaAlmeida — Fri, 01 Sep 2023 17:39:58 GMT

hi all,

im monitoring kubernetes and at the pods information section inside the "overview of the workload" chart, in the host tab appears "Missing host information"

Which infom should appear here and how can i obtain this info ?

Thanks in advance you all

Re: "Missing host information" message at Overview of workload section when monitoring kubernetes

DanielS — Fri, 01 Sep 2023 20:26:44 GMT

Hi @MariettaAlmeida the Missing Host Information on Kubernetes could be a normal situation depending on the Kubernetes deployment option you choose.

Re: "Missing host information" message at Overview of workload section when monitoring kubernetes

DanielS — Fri, 01 Sep 2023 20:41:57 GMT

@MariettaAlmeidaNormally I used ClassicFullStack but If the devs use Fargate I need to use Application Monitoring.

Do you have access to the Kubernetes Environment? can you check the DynaKube resource?

https://github.com/Dynatrace/dynatrace-operator/blob/v0.13.0/assets/samples/classicFullStack.yaml

Re: "Missing host information" message at Overview of workload section when monitoring kubernetes

MariettaAlmeida — Fri, 01 Sep 2023 20:47:14 GMT

@DanielS actually no but i reading about it, i used the classicFullstack option.

Can you give me use cases that can help me identify which deployment option should i use?

Re: "Missing host information" message at Overview of workload section when monitoring kubernetes

DanielS — Fri, 01 Sep 2023 21:00:13 GMT

Yes, I love this page, it is very well documented here with its capabilities and limitations for each case. I mainly use Classic, but Fargate only supports Application Only, and always on Fargate I see Missing Host Information which has a lot of sense because is serverless.

But in your case is not normal, I guess that an error could be seen using describe in the pod from the kubectl CLI.

Re: "Missing host information" message at Overview of workload section when monitoring kubernetes

MariettaAlmeida — Fri, 01 Sep 2023 21:04:08 GMT

😲ok, will check with the client then and thank you for the documentation !

have a nice day @DanielS

Re: "Missing host information" message at Overview of workload section when monitoring kubernetes

SureshThakur — Tue, 06 Aug 2024 18:58:54 GMT

Hi @DanielS

I too get this error very often on workload page.

I am using classicFullStack mode

What are the most common reason for this message?

Re: "Missing host information" message at Overview of workload section when monitoring kubernetes

Mizső — Wed, 07 Aug 2024 10:37:32 GMT

Hi @SureshThakur ,

Missing host infromation could be based on my experience:

1. Node selector is used in the custome resource yaml. Eg. oneagents pods are only on worker nodes. In this case when you check the workloads/pods you can see host information only at workloads/pods which ones are on worker nodes. In case of workloads/pods which ones are on infra or master node you could see missing host information.

2.If you creatre a Management Zone for example to a namespace (including workloads/pods), but you do not add the kubernetes nodes you can also meet with this missing host information message.

I hope it helps.

Best regards,

Mizső

Re: "Missing host information" message at Overview of workload section when monitoring kubernetes

DanielS — Wed, 07 Aug 2024 14:28:33 GMT

Hello @SureshThakur this is not necessarily an error, for example, in my case I have several Kubernetes deployments but some of them have AWS Fargate, as a FaaS you don't have a host, you only pay for CPU and Memory, in those cases you see the Missing Host Information. Other cases for this could be that you don't have theployed OA on the host (worker) where is running the Pod.

Re: "Missing host information" message at Overview of workload section when monitoring kubernetes

SureshThakur — Wed, 07 Aug 2024 15:36:29 GMT

Thanks @DanielS @Mizső for your response. This clarifies my doubt.