OpenAPI / Swagger2 spec generation #30233

mbohlool · 2016-08-08T17:03:36Z

This is alpha version of OpenAPI spec generation. Generated "/swagger.json" file (accessible on api server) is a valid OpenAPI spec with some warnings that will be fixed in next versions of spec generation. Currently it is possible to generate a client using this spec though I did not test the clients.

reference: #13414

Release note:

Alpha support for OpenAPI (aka. Swagger 2.0) specification served on /swagger.json (enabled by default)

This change is

smarterclayton · 2016-08-09T00:20:56Z

pkg/genericapiserver/openapi/exceptions.go

+// fixOperation tries to rename operation IDs to make OpenAPI spec valid. The best solution to repeated
+// ops is to fix it in the source. If that is not possible, the opFix map would let customize the renaming. If the ID
+// is not in the opFix map, the name will be concatenated with a string computed from the path. see inferNamePartFromPath
+// for more information.


How do we fix generation so this is not necessary?

It should be done in api_installer. We should pass unique Operation name for each operation. There were just too many of them. I think it is better to have swagger 2.0 working and mark it as alpha, then fix those.

Pass this function in to the installer as a fixup func so the implementation in this package knows nothing about Kube.

nikhiljindal · 2016-08-11T22:44:00Z

pkg/genericapiserver/openapi/openapi.go

+func (o *openAPI) buildModels() (definitions spec.Definitions, err error) {
+	definitions = spec.Definitions{}
+	for _, decl := range swagger.NewSwaggerBuilder(*o.config.SwaggerConfig).ProduceAllDeclarations() {
+		for _, oldNamedModel := range decl.Models.List {


Why calling it oldNamedModel?

nikhiljindal · 2016-08-11T22:53:19Z

Looks good, mostly naming comments.

Would be good to add unit tests for the new code.
We also have unit tests to test the swagger response from /api at server:

kubernetes/pkg/master/master_test.go

Line 435 in dfcb649

resp, err := http.Get(server.URL + "/apis")

.

We can add a simple test for swagger.json path.

nikhiljindal · 2016-08-17T18:33:45Z

Would be great if we can have unit tests for all methods with non-trivial code.
I will leave it up to you to make a call on which functions in this PR need tests.

mbohlool · 2016-08-18T15:13:42Z

I've added some test that covers most of the code. This is ready for another round of review.

smarterclayton · 2016-08-18T17:19:21Z

cmd/kube-apiserver/app/server.go

@@ -272,6 +272,7 @@ func Run(s *options.APIServer) error {
 	genericConfig.ProxyDialer = proxyDialerFn
 	genericConfig.ProxyTLSClientConfig = proxyTLSClientConfig
 	genericConfig.Serializer = api.Codecs
+	genericConfig.OpenAPIInfo.Title = "Kubernetes"


Do you also have to set version here?

newConfig set both Title and Version to "Generic API Server" and "unversioned". here we just overwrite the title.

smarterclayton · 2016-08-18T17:20:02Z

Has verification failures

nikhiljindal · 2016-08-18T19:54:53Z

Thanks, LGTM.
Feel free to self apply the label when you get all checks to pass.

mbohlool · 2016-08-18T23:50:24Z

@k8s-bot test this issue #30407

mbohlool · 2016-08-19T02:06:09Z

@k8s-bot test this issue #30407

k8s-bot · 2016-08-19T11:21:17Z

GCE e2e build/test passed for commit c5f1d63.

k8s-github-robot · 2016-08-19T11:21:47Z

Automatic merge from submit-queue

piosz · 2016-08-19T13:24:53Z

Godeps/Godeps.json

@@ -1,6 +1,6 @@
 {
 	"ImportPath": "k8s.io/kubernetes",
-	"GoVersion": "go1.6",
+	"GoVersion": "go1.7",


Was this change intentional? If not please revert.

cc @wojtek-t

no it was not. sent the PR to revert it.

nikhiljindal · 2016-08-23T21:26:49Z

Now that we have a separate param, we should mention in the release note that admins can turn off this new endpoint by setting EnableOpenAPISupport = false.

However for admins to be able to turn it off, we will need to expose it as a command line flag in server_run_options and use that to set config.EnableOpenAPISupport.

smarterclayton · 2016-08-23T22:09:52Z

Is there a downside to this endpoint being exposed?

On Tue, Aug 23, 2016 at 5:27 PM, Nikhil Jindal notifications@github.com
wrote:

Now that we have a separate param, we should mention in the release note
that admins can turn off this new endpoint by setting EnableOpenAPISupport
= false.

However for admins to be able to turn it off, we will need to expose it as
a command line flag in server_run_options and use that to set
config.EnableOpenAPISupport.

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mbohlool · 2016-09-12T20:23:52Z

@nikhiljindal, @smarterclayton Sorry I missed these comment. I see swagger is enabled by default and we do not have a server config for it. I don't see any downside having this enabled by default, but I can add server config if you think that is useful.

nikhiljindal · 2016-09-12T23:52:03Z

I am fine with keeping this enabled by default - should probably mention that explicitly in release notes. Right now it says "Alpha support". We use alpha at other places to mean disabled by default.

Re: allowing admins to disable it. Its generally good to allow admins to turn off new features. Not critical.

mbohlool · 2016-09-12T23:57:08Z

Sure, I will send another PR to allow admins to disable it after my improvement #31468 got merged. Do we still have time to change release note of 1.4?

googlebot added the cla: yes label Aug 8, 2016

k8s-github-robot assigned smarterclayton Aug 8, 2016

k8s-github-robot added size/XL Denotes a PR that changes 500-999 lines, ignoring generated files. release-note-label-needed labels Aug 8, 2016

mbohlool force-pushed the swagger2 branch from 23092ef to 1dd53dd Compare August 8, 2016 17:07

smarterclayton reviewed Aug 9, 2016
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mbohlool force-pushed the swagger2 branch 2 times, most recently from ded91bb to c661b56 Compare August 9, 2016 02:52

mbohlool assigned nikhiljindal Aug 10, 2016

mbohlool added this to the v1.4 milestone Aug 11, 2016

nikhiljindal reviewed Aug 11, 2016
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k8s-github-robot added the needs-rebase Indicates a PR cannot be merged because it has merge conflicts with HEAD. label Aug 12, 2016

mbohlool force-pushed the swagger2 branch 3 times, most recently from 97b3f57 to 61b69af Compare August 18, 2016 15:12

k8s-github-robot added size/XXL Denotes a PR that changes 1000+ lines, ignoring generated files. and removed size/XL Denotes a PR that changes 500-999 lines, ignoring generated files. labels Aug 18, 2016

smarterclayton reviewed Aug 18, 2016
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mbohlool force-pushed the swagger2 branch from 61b69af to fb103cd Compare August 18, 2016 18:43

mbohlool added 2 commits August 18, 2016 13:50

Do not ignore .drone.sec file

ca7180e

Add go-openapi dependencies and update Godeps

0c51663

mbohlool force-pushed the swagger2 branch from fb103cd to e8e81a3 Compare August 18, 2016 21:34

Generates OpenAPI (aka Swagger 2.0) Spec on /swagger.json path

c5f1d63

mbohlool force-pushed the swagger2 branch from e8e81a3 to c5f1d63 Compare August 18, 2016 22:33

mbohlool added lgtm "Looks good to me", indicates that a PR is ready to be merged. priority/backlog Higher priority than priority/awaiting-more-evidence. labels Aug 19, 2016

k8s-github-robot merged commit 5898f87 into kubernetes:master Aug 19, 2016

piosz reviewed Aug 19, 2016
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nikhiljindal mentioned this pull request Sep 12, 2016

Generate 2.0 swagger spec #13414

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OpenAPI / Swagger2 spec generation #30233

OpenAPI / Swagger2 spec generation #30233

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OpenAPI / Swagger2 spec generation #30233

OpenAPI / Swagger2 spec generation #30233

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