topic Re: How to retrieve a key value of metadata item in properties of an entity (openshift container)? in Container platforms

How to retrieve a key value of metadata item in properties of an entity (openshift container)?

henridb — Fri, 02 Sep 2022 07:55:32 GMT

Hello all,

Retrieving the properties via API for a container instance delivers:

{
  "entityId": "CONTAINER_GROUP_INSTANCE-08E89EB939BF5F49",
  "type": "CONTAINER_GROUP_INSTANCE",
  "displayName": "pega-web-55959b478c-dx8qw",
  "properties": {
    "metadata": [
      {
        "key": "KUBERNETES_NAMESPACE",
        "value": "pega-cm02-dev01"
      },
      {
        "key": "KUBERNETES_FULL_POD_NAME",
        "value": "pega-web-55959b478c-dx8qw"
      },
      {
        "key": "KUBERNETES_BASE_POD_NAME",
        "value": "pega-web-*"
      }
    ]
  }
}

Now I need to check for a text in the KUBERNETES_NAMESPACE value from the metadata in properties to do some auto tagging. What is the syntax for that?

This is as far as we got now: type(CONTAINER_GROUP_INSTANCE),...

Regards,

Henri

Re: How to retrieve a key value of metadata item in properties of an entity (openshift container)?

christoph_wilts — Wed, 07 Sep 2022 12:05:53 GMT

Hi Henri,

If you like to filter for metadata from the properties section in the auto-tagging rules, you can use the following entity selector:

type(CONTAINER_GROUP_INSTANCE), metadata(KUBERNETES_NAMESPACE:<VALUE>)

You can exchange the <VALUE> with the namespace you want to filter for. I have attached an example for the kube-system namespace:

Re: How to retrieve a key value of metadata item in properties of an entity (openshift container)?

henridb — Thu, 08 Sep 2022 07:05:52 GMT

Thanks Christoph,

It even works with multiple value pairs:

type(CONTAINER_GROUP_INSTANCE), metadata(KUBERNETES_NAMESPACE:<VALUE>,KUBERNETES_NAMESPACE:<VALUE2>)

Re: How to retrieve a key value of metadata item in properties of an entity (openshift container)?

aporcher — Fri, 09 Sep 2022 02:42:18 GMT

Hi Christoph,
Any clue about which is the syntax if I want all entities where a metadata field has any value instead of a specific value? I'm looking for something like type(CONTAINER_GROUP_INSTANCE), metadata(CLOUD_FOUNDRY_APP_NAME) which works for the majority of key:value fields but does not work for metadata.
In this case, I'm using the /api/v2/entities API

Thanks,
Alaor

Re: How to retrieve a key value of metadata item in properties of an entity (openshift container)?

henridb — Fri, 09 Sep 2022 11:23:37 GMT

Alaor,

seems this one is EQUALS comparison only, no contains.

Regards,

Henri

Re: How to retrieve a key value of metadata item in properties of an entity (openshift container)?

christoph_wilts — Fri, 09 Sep 2022 11:59:13 GMT

Yes Henri is right - it only allows EQUALS at the moment.

The filter is following the Entity Attribute selector: https://www.dynatrace.com/support/help/shortlink/api-entities-v2-selector#attribute