Object Manifest Information

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Note

Requirements

The WhaTap Kubernetes agent 1.5.5 or later is required. If the version is less than 1.5.5, the master meta info screen appears.

The Kubernetes Master Agent automatically collects manifests for objects such as Pods, services, and ReplicaSets in clusters once a day. The data is stored by date, allowing users to easily check the cluster status as of a specific date. The collected data can be compared by date, making it easy to identify changes in clusters over time.

Additionally, you can freely set the collection time zone by specifying the container environment variables before deployment of the Kubernetes Master Agent. For more information about the configuration, see the guide to Container environment variables.

Container environment variables

• store_k8s_object_manifest_enabled

  Default true

  The object manifest collection feature is enabled. The default value is true, the collection feature is enabled without any further settings.

• store_k8s_object_manifest_timezone

  Default UTC

  Set the time zone for collection of object manifests. If there is no separate setting, collection starts at midnight based on UTC by default.

  • Can be set as a region-based time zone or in GMT offset format.

  • Supports a precise time setting in minutes.

    For example, a non-standard time zone for a specific region can be specified by setting it to GMT+0810.

• store_k8s_object_manifest_max_fetch_limit

  Default 50

  Set the number of objects to request to the cluster at a time. If there is no separate setting, 50 items are requested upon request based on the default value of 50.

  For example, when setting the option 30 in a cluster with a total number of Pods of 90, pods are requested 3 times for 30 pods each.

Example

containers:
	- name: whatap-master-agent
	  image: whatap/kube_mon
	  resources:
	    requests:
	      memory: 300Mi
	      cpu: 100m
	    limits:
	      memory: 350Mi
	      cpu: 200m
	  ports:
	    - containerPort: 6600
	  command: ['/bin/entrypoint.sh']
	  env:
	    - name: WHATAP_LICENSE
	      value: {PROJECT_LICENSE_VALUE}
	    - name: WHATAP_HOST
	      value: "13.124.11.223/13.209.172.35"
	    - name: WHATAP_PORT
	      value: "6600"
	    - name: WHATP_MEM_LIMIT
	      valueFrom:
	        resourceFieldRef:
	          containerName: whatap-master-agent
	          resource: limits.memory
	    # Added environment variables
	    - name: store_k8s_object_manifest_enabled
	      value: "true"
	    - name: store_k8s_object_manifest_timezone
	      value: "GMT+9"
	    - name: store_k8s_object_manifest_max_fetch_limit
	      value: "50"

Basic screen guide

Object list

When you select a desired object from the object type list, you can see the list of objects. It displays the objects such as Name, Namespace, Uid, and CreatedTime. The following screen is an example when selecting Deployment from the object type list.

Object Manifest information details

When you select Display Detail in the object list, you can see the manifest of the object selected in the Object Manifest Detail window.

List of Object Manifest saving times

• You can see the list of the times saved for object manifests on the left. Object manifests are automatically saved at a specified time per day.

• The object manifest saving time can be changed by modifying the value of the master agent's container environment variable, store_k8s_object_manifest_timezone.

• Object manifests are saved at a scheduled time per day, but are also additionally saved when any warning events occur.

Note

The warning events in which the object manifests are saved indicate Kubernetes event objects of Warning type.

Linking the Kubernetes events

When you click Warning in the Object manifest detail window, Kubernetes events appear as follows:

Note

The Kubernetes event linking is supported by WhaTap Master Agent 1.6.1 or later.

Comparison of object manifests

When Compare is enabled, you can compare two saved object manifests by selecting in the saved time list. Any changes are highlighted.

Note

Viewing object manifests on the container map

You can see the object manifests in the container map.

• Select a desired block.

• In the summary window, select the Target Info tab to view the Pod or container data.

• On the right of the Pod, Deployment, ReplicaSet, and Node tags, click More and then select Object Manifest.