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Use user provided image name to launch container #4926

Merged
merged 1 commit into from
Nov 30, 2018
Merged

Use user provided image name to launch container #4926

merged 1 commit into from
Nov 30, 2018

Commits on Nov 27, 2018

  1. Use user provided image name to launch container 

    This allows the container to be tagged with a user friendly image name
(e.g. `redis:3.2`) rather than the image ID (e.g.
`sha256:87856cc39862cec77541d68382e4867d7ccb29a85a17221446c857ddaebca916`).

Useful for human debugging, as well as some debugging and image scanning
tools.

This risks two bad changes:
1. Discrepancy in image resolution between docker and Nomad's image
loader.
  * I checked the image creation paths in Nomad, and noticed that we
either pulled the image or inspect the image with the user provided
name.

2. A race in image tagging where the tag is modified between image
loading and container creation.
  * I, personally, don't think this case is cause for concern, as it is
analogous to the task running a bit later.  As long as the image is
still present, creating the container should be good.
    Mahmood Ali committed Nov 27, 2018
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