Kubernetes Operational View provides a read-only system dashboard for multiple K8s clusters. Provides a common operational picture for multiple Kubernetes clusters.
Goal:
provide a common operational picture for multiple Kubernetes clusters.
- Render nodes and indicate their overall status (“Ready”)
- Show node capacity and resource usage (CPU, memory)
- Render one “box” per CPU and fill up to sum of pod CPU requests/usage
- Render vertical bar for total memory and fill up to sum of pod memory requests/usage
- Render individual pods
- Indicate pod status by border line color (green: ready/running, yellow: pending, red: error etc)
- Show current CPU/memory usage (gathered from Heapster) by small vertical bars
- System pods (“kube-system” namespace) will be grouped together at the bottom
- Provide tooltip information for nodes and pods
- Animate pod creation and termination
What it is not:
- It’s not a replacement for the Kubernetes Dashboard. The Kubernetes Dashboard is a general purpose UI which allows managing applications.
- It’s not a monitoring solution. Use your preferred monitoring system to alert on production issues.
- It’s not a operation management tool. Kubernetes Operational View does not allow interacting with the actual cluster.
Pod Status
- Each pod indicates its status by color and animation:
- Running and all containers ready: constant green
- Running and not all containers ready: flashing green
- Pending or ContainerCreating: flashing yellow
- ImagePullBackoff or CrashLoopBackoff: flashing red
- Succeeded (for jobs): blue
Tooltips
Various UI elements provide additional tooltip information when hovering over them with the mouse:
- Hovering over the title bar of a node box reveals the node’s labels.
- Hovering over the vertical resource bars will show the node’s capacity, sum of all resource requests and current resource usage.
- Hovering over a pod will show the pod’s labels, container status and resources.
Filtering Pods
- Kubernetes Operational View allows you to quickly find your running application pods.
- Typing characters will run the filter, i.e. non-matching pods will be greyed out.
You can filter by:
- name
- labels – when query includes =, e.g. env=prod
The pod filter is persisted in the location bar (#q=.. query parameter) which allows to conveniently send the filtered view to other users (e.g. for troubleshooting).
Sorting Pods
Pods can be sorted by different properties:
- pod name (this is the default)
- age (start time)
- memory usage (metric collected from Heapster)
- CPU usage (metric collected from Heapster)
- Sorting by memory or CPU allows finding the most resource hungry pod (per node).
Filtering Clusters
Clicking on a cluster handle (the top bar of the cluster box) will toggle between showing the single cluster alone and all clusters.
