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60 lines
1.7 KiB
60 lines
1.7 KiB
9 years ago
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Testing via Helm
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================
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Problem Summary
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---------------
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Currently in helm/charts we have a simple way of health-checking charts which
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checks that all pods in the chart reach "Running" state on a running Kubernetes
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cluster. In order to build a system that holds chart quality at the forefront,
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we need to introduce an easy way to create and run potentially more complex
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application-centric tests.
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Proposed Solution
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-----------------
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#### User Experience
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```
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# helm/dm UX for installing charts stays the same
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# addition to UX giving easy-to-run tests:
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helm test deis
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```
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#### Helm's new `test` Command
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This command uses test logic located in `<chart name>/tests/` to ensure that
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the chart is operating as intended in an end to end or system test sort of
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fashion.
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The command is fairly simple - all it does is load a set of charts into a
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Kubernetes cluster (might be the same or different as the deployed chart).
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What usually makes sense to have is a one-off pod that runs to completion and
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exits with a certain exit code: non-zero signifying failure or zero signifying
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success. The pod is not automatically restarted so that humans or automated
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tools can inspect the results which might be a log, test artifact, or something
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else. `helm test` should therefore be able to be rerun the tests over and over and
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not be hindered by an existing similarly-named set of pods, rcs, or services.
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By forcing tests to also be containerized and Kubernetes-ready we have the
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benefit of having a single and easily understandable entry point - it's just
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another set of Kubernetes components.
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#### Modifications to Chart Structure
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```
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ROOT/
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Chart.yaml
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LICENSE
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README.md
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...
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tests/
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Chart.yaml
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templates/
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some.yaml
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some.jinja
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some.jinja.schema
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```
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