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Be more specific about cpu-shares passed to Docker (#4016)

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Docker documentation (https://docs.docker.com/engine/reference/run/) reads:
  
"To modify the proportion from the default of 1024, use the -c or --cpu-shares flag to set the weighting to 2 or higher. If 0 is set, the system will ignore the value and use the default of 1024."

So the Kubernetes documentation gives the impression that if requests.cpu is zero, Docker would end up applying a value of 1024, which isn't the case.

This change makes the explanation more precise, hopefully without making it much more difficult to read.
This commit is contained in:
Eric Mountain @ Amadeus
2017-06-21 01:01:16 +02:00
committed by Andrew Chen
parent 82449c5dcf
commit e53bdeb5d0
1 changed files with 2 additions and 2 deletions
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docs/concepts/configuration/manage-compute-resources-container.md
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@@ -133,8 +133,8 @@ to the container runtime.
When using Docker:
- The `spec.containers[].resources.requests.cpu` is converted to its core value,
which is potentially fractional, and multiplied by 1024. This number is used
as the value of the
which is potentially fractional, and multiplied by 1024. The greater of this number
or 2 is used as the value of the
[`--cpu-shares`](https://docs.docker.com/engine/reference/run/#/cpu-share-constraint)
flag in the `docker run` command.