Warning! This repository is archived and should not be used anymore. The active development was moved to the following repo: https://github.com/NTTDATA-DACH/viewnode

viewnode

The viewnode shows Kubernetes cluster nodes with their pods and containers.
It is very useful when you need to monitor multiple resources such as nodes, pods or containers in a dynamic environment like a CI/CD platform.

The viewnode shows nodes with their pods and containers.
You can find the source code and usage documentation at GitHub: https://github.com/NTTDATA-EMEA/viewnode.
Usage:
  viewnode [flags]
  viewnode [command]
Available Commands:
  help        Help about any command
  version     Plugin Version
Flags:
  -A, --all-namespaces             use all namespaces
  -d, --debug                      run in debug mode (shows stack trace in case of errors)
  -h, --help                       help for viewnode
  -n, --namespace string           namespace to use
  -f, --node-filter string         show only nodes according to filter
  -p, --pod-filter string          show only pods according to filter
  -c, --show-containers            show containers in pod
  -t, --show-pod-start-times       show start times of pods
  -r, --show-requests-and-limits   show requests and limits for containers' cpu and memory (requires -c flag)
      --show-running-only          show running pods only
Use "viewnode [command] --help" for more information about a command.

Installation

The viewnode is written in go, so just download the correct executable suitable for your platform from the releases and run it.
You can also download the source code and compile it.

If you copy the executable file into your PATH, you can use it like a kubectl command, i.e. without the hyphen:

kubectl viewnode --show-running-only

Usage examples

Showing nodes and pods:

$ viewnode
namespace: jenkins-onprem
8 pod(s) in total
0 unscheduled pod(s)
3 running node(s) with 8 scheduled pod(s):
- gke-dcgsecigke001-dcgsecigke001-linux-1cd8c3b9-8fws running 2 pod(s) (linux/amd64)
  * docker-in-the-cloud-341-ffkt5-2k64t (running)
  * docker-in-the-cloud-86-822pd-d6p3d (running)
- gke-dcgsecigke001-dcgsecigke001-linux-1cd8c3b9-b0np running 2 pod(s) (linux/amd64)
  * docker-in-the-cloud-338-3wc8r-n1t7z (running)
  * docker-in-the-cloud-340-cms5r-pxxq7 (running)
- gke-dcgsecigke001-dcgsecigke001-linux-1cd8c3b9-v1vr running 4 pod(s) (linux/amd64)
  * docker-in-the-cloud-337-4c4lm-q3mtp (running)
  * docker-in-the-cloud-339-4x9dq-0xd3q (running)
  * docker-in-the-cloud-342-r5khq-9cx2w (running)
  * liveness-test-4-boom (failed)

Showing nodes, pods and containers:

$ viewnode --show-containers
namespace: jenkins-onprem
8 pod(s) in total
0 unscheduled pod(s)
3 running node(s) with 8 scheduled pod(s):
- gke-dcgsecigke001-dcgsecigke001-linux-1cd8c3b9-8fws running 2 pod(s) (linux/amd64)
  * docker-in-the-cloud-341-ffkt5-2k64t (running) (3: default/running docker-daemon/running jnlp/running)
  * docker-in-the-cloud-86-822pd-d6p3d (running) (3: default/running docker-daemon/running jnlp/terminated)
- gke-dcgsecigke001-dcgsecigke001-linux-1cd8c3b9-b0np running 2 pod(s) (linux/amd64)
  * docker-in-the-cloud-338-3wc8r-n1t7z (running) (3: default/running docker-daemon/running jnlp/running)
  * docker-in-the-cloud-340-cms5r-pxxq7 (running) (3: default/running docker-daemon/running jnlp/running)
- gke-dcgsecigke001-dcgsecigke001-linux-1cd8c3b9-v1vr running 4 pod(s) (linux/amd64)
  * docker-in-the-cloud-337-4c4lm-q3mtp (running) (3: default/running docker-daemon/running jnlp/running)
  * docker-in-the-cloud-339-4x9dq-0xd3q (running) (3: default/running docker-daemon/running jnlp/running)
  * docker-in-the-cloud-342-r5khq-9cx2w (running) (3: default/running docker-daemon/running jnlp/running)
  * liveness-test-4-boom (failed) (3: dead-container/terminated liveness1/running liveness2/running)

Showing nodes and pods with their start times:

$ viewnode --show-pod-start-times
namespace: jenkins-onprem
8 pod(s) in total
0 unscheduled pod(s)
3 running node(s) with 8 scheduled pod(s):
- gke-dcgsecigke001-dcgsecigke001-linux-1cd8c3b9-8fws running 2 pod(s) (linux/amd64)
  * docker-in-the-cloud-341-ffkt5-2k64t (running/Thu Aug 26 09:36:04 CEST 2021)
  * docker-in-the-cloud-86-822pd-d6p3d (running/Thu Aug 19 09:09:20 CEST 2021)
- gke-dcgsecigke001-dcgsecigke001-linux-1cd8c3b9-b0np running 2 pod(s) (linux/amd64)
  * docker-in-the-cloud-338-3wc8r-n1t7z (running/Thu Aug 26 09:36:02 CEST 2021)
  * docker-in-the-cloud-340-cms5r-pxxq7 (running/Thu Aug 26 09:36:04 CEST 2021)
- gke-dcgsecigke001-dcgsecigke001-linux-1cd8c3b9-v1vr running 4 pod(s) (linux/amd64)
  * docker-in-the-cloud-337-4c4lm-q3mtp (running/Thu Aug 26 09:35:36 CEST 2021)
  * docker-in-the-cloud-339-4x9dq-0xd3q (running/Thu Aug 26 09:36:03 CEST 2021)
  * docker-in-the-cloud-342-r5khq-9cx2w (running/Thu Aug 26 09:36:05 CEST 2021)
  * liveness-test-4-boom (failed/Wed Aug 25 15:07:52 CEST 2021)

You can also combine show options:

$ viewnode --show-pod-start-times --show-containers
namespace: jenkins-onprem
8 pod(s) in total
0 unscheduled pod(s)
3 running node(s) with 8 scheduled pod(s):
- gke-dcgsecigke001-dcgsecigke001-linux-1cd8c3b9-8fws running 2 pod(s) (linux/amd64)
  * docker-in-the-cloud-341-ffkt5-2k64t (running/Thu Aug 26 09:36:04 CEST 2021) (3: default/running docker-daemon/running jnlp/running)
  * docker-in-the-cloud-86-822pd-d6p3d (running/Thu Aug 19 09:09:20 CEST 2021) (3: default/running docker-daemon/running jnlp/terminated)
- gke-dcgsecigke001-dcgsecigke001-linux-1cd8c3b9-b0np running 2 pod(s) (linux/amd64)
  * docker-in-the-cloud-338-3wc8r-n1t7z (running/Thu Aug 26 09:36:02 CEST 2021) (3: default/running docker-daemon/running jnlp/running)
  * docker-in-the-cloud-340-cms5r-pxxq7 (running/Thu Aug 26 09:36:04 CEST 2021) (3: default/running docker-daemon/running jnlp/running)
- gke-dcgsecigke001-dcgsecigke001-linux-1cd8c3b9-v1vr running 4 pod(s) (linux/amd64)
  * docker-in-the-cloud-337-4c4lm-q3mtp (running/Thu Aug 26 09:35:36 CEST 2021) (3: default/running docker-daemon/running jnlp/running)
  * docker-in-the-cloud-339-4x9dq-0xd3q (running/Thu Aug 26 09:36:03 CEST 2021) (3: default/running docker-daemon/running jnlp/running)
  * docker-in-the-cloud-342-r5khq-9cx2w (running/Thu Aug 26 09:36:05 CEST 2021) (3: default/running docker-daemon/running jnlp/running)
  * liveness-test-4-boom (failed/Wed Aug 25 15:07:52 CEST 2021) (3: dead-container/terminated liveness1/running liveness2/running)

As well as filter nodes and pods:

$ viewnode --node-filter v1vr
namespace: jenkins-onprem
4 pod(s) in total
0 unscheduled pod(s)
1 running node(s) with 4 scheduled pod(s):
- gke-dcgsecigke001-dcgsecigke001-linux-1cd8c3b9-v1vr running 4 pod(s) (linux/amd64)
  * docker-in-the-cloud-337-4c4lm-q3mtp (running)
  * docker-in-the-cloud-339-4x9dq-0xd3q (running)
  * docker-in-the-cloud-342-r5khq-9cx2w (running)
  * liveness-test-4-boom (failed)

Very popular is combining viewnode with watch command e.g. watching all nodes, pods and containers every second can be configured as follows:

watch -n1 viewnode --show-pod-start-times --show-containers

Compatibility

The viewnode was tested against Google Cloud Platform with Kubernetes v1.19.
It should however work with all clouds supported by client-go.