Chapter 14. Monitoring Images
14.1. Overview
You can monitor images and nodes in your instance using the CLI.
14.2. Viewing Images Statistics
You can display usage statistics about all of the images that OpenShift Container Platform manages. In other words, all the images pushed to the internal registry either directly or through a build.
To view the usage statistics:
$ oc adm top images NAME IMAGESTREAMTAG PARENTS USAGE METADATA STORAGE sha256:80c985739a78b openshift/python (3.5) yes 303.12MiB sha256:64461b5111fc7 openshift/ruby (2.2) yes 234.33MiB sha256:0e19a0290ddc1 test/ruby-ex (latest) sha256:64461b5111fc71ec Deployment: ruby-ex-1/test yes 150.65MiB sha256:a968c61adad58 test/django-ex (latest) sha256:80c985739a78b760 Deployment: django-ex-1/test yes 186.07MiB
The command displays the following information:
- Image ID
-
Project, name, and tag of the accompanying
ImageStreamTag - Potential parents of the image, listed by their IDs
- Information about where the image is used
- Flag informing whether the image contains proper Docker metadata information
- Size of the image
14.3. Viewing ImageStreams Statistics
You can display usage statistics about ImageStreams.
To view the usage statistics:
$ oc adm top imagestreams NAME STORAGE IMAGES LAYERS openshift/python 1.21GiB 4 36 openshift/ruby 717.76MiB 3 27 test/ruby-ex 150.65MiB 1 10 test/django-ex 186.07MiB 1 10
The command displays the following information:
-
Project and name of the
ImageStream -
Size of the entire
ImageStreamstored in the internal Red Hat Container Registry -
Number of images this particular
ImageStreamis pointing to -
Number of layers
ImageStreamconsists of
14.4. Pruning Images
The information returned from the previous commands is helpful when performing image pruning.
