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Add resource usage docs

This commit is contained in:
Caleb Woodbine 2019-10-01 10:16:23 +13:00
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contributors/devel/sig-testing/writing-good-e2e-tests.md
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@ -229,3 +229,16 @@ Unreachable nodes are evacuated and then repopulated upon rejoining [Disruptive]
Note that opening issues for specific better tooling is welcome, and
code implementing that tooling is even more welcome :-).
### Resource usage ###
When writing tests, resources used in the tests should be chosen specifically and sanely quanified.
Therefore it is important to use resources that are:
1. appropriate to the test
2. inexpensive (containing little or no overhead)
3. create just as many an needed, no more
For example:
1. only using the resource type which is appropriate to the `test/e2e/<AREA>/<SPECIFIC_AREA>`
2. the resource type `ConfigMap` is inexpensive, common, and stateless. It should be used for such things as fetching created resources
3. although the clusters used for testing are generally beefy, an overamount of resources should not be created as it is unnecessary