kubectl dfi

Print disk usage of container image on Kubernetes node(s) like a linux "df" command.

$ kubectl dfi
NAME                               IMAGE USED   ALLOCATABLE   CAPACITY     %USED
node1-default-pool-500decb4-5q58   1982531K     47093746K     101241290K   1%
node2-default-pool-500decb4-7wpk   1891326K     47093746K     101241290K   1%
node3-default-pool-500decb4-9dd4   1982531K     47093746K     101241290K   1%

And list images on Kubernetes node(s).

$ kubectl dfi --list node1-default-pool-500decb4-5q58
node1-default-pool-500decb4-5q58   286572K      k8s.gcr.io/node-problem-detector:v0.4.1
node1-default-pool-500decb4-5q58   223242K      gcr.io/stackdriver-agents/stackdriver-logging-agent:0.6-1.6.0-1
node1-default-pool-500decb4-5q58   135716K      k8s.gcr.io/fluentd-elasticsearch:v2.0.4
node1-default-pool-500decb4-5q58   103488K      k8s.gcr.io/fluentd-gcp-scaler:0.5
node1-default-pool-500decb4-5q58   102992K      k8s.gcr.io/kube-proxy:v1.11.8-gke.6
node1-default-pool-500decb4-5q58   102319K      k8s.gcr.io/kubernetes-dashboard-amd64:v1.8.3
...

Install

$ make
$ mv _output/kubectl-dfi /usr/local/bin/.

# Happy dfi time!
$ kubectl dfi

Usage

# Show image usage of Kubernetes nodes.
kubectl dfi

# Using label selector.
kubectl dfi -l key=value

# Use image count with image disk usage.
kubectl dfi --count

# Print raw(bytes) usage.
kubectl dfi --bytes --without-unit

# Using binary prefix unit (GiB, MiB, etc)
kubectl dfi -g -B

# List images on nodes.
kubectl dfi --list

Notice

IMAGE USED is simply sum up of container image size reported by kubelet.
In fact, node disk might be not used so much by container images because of cache by layered filesystem.

License

This software is released under the MIT License.