July 2018
Intermediate to advanced
504 pages
11h 34m
English
Content preview from Learn OpenShift
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Using Docker history
We can check the history of image modifications using docker history:
$ docker history custom_image2IMAGE CREATED CREATED BY SIZE COMMENT6b9be8efcb3a 21 hours ago /bin/sh -c echo "This is a custom image" > /u 23 B01154c38b473 2 weeks ago /bin/sh -c #(nop) CMD ["httpd-foreground"] 0 B...output truncated for brevity...
Note that a new layer, 6b9be8efcb3a, is added. This is where we change the content of the index.html file in comparison to the original httpd image.