Exposing Swagger File through Executor and providing Swagger UI through endpoint

[axsaucedo]

The current approach is to follow the standard introduced by FastAPI https://github.com/tiangolo/fastapi#interactive-api-docs

Fixes #1703

• Exposes Swagger JSON through Executor
• Provides versioned path for JSON
• Exposes Swagger UI (both CDN (4kb) and Bundled (1.4mb) for airgapped setups) with seldon.json

What it doesn't include:

• Dynamically adapted Seldon.json to include parameters specific to deployment
• Updating API schema to include explain and metadata endpoints, etc

Things to consider:

• seldon.json openapi schema has been replicated into the executor API, it may be best to keep it on the base folder and copy it in the docker file to avoid replication
• Dynamically modify parameters would require loading the file dynamically and serving it as file/template, it would be good to align on what would be the best way
• It could be possible in a separate PR to align the Metadata work to also expose some metadata information

[seldondev]

Wed Apr 22 21:42:45 UTC 2020
The logs for [lint] [2] will show after the pipeline context has finished.
https://github.com/SeldonIO/seldon-core/blob/gh-pages/jenkins-x/logs/SeldonIO/seldon-core/PR-1730/2.log

impatient try
jx get build logs SeldonIO/seldon-core/PR-1730 --build=2

[seldondev]

Wed Apr 22 21:42:58 UTC 2020
The logs for [pr-build] [1] will show after the pipeline context has finished.
https://github.com/SeldonIO/seldon-core/blob/gh-pages/jenkins-x/logs/SeldonIO/seldon-core/PR-1730/1.log

impatient try
jx get build logs SeldonIO/seldon-core/PR-1730 --build=1

[seldondev]

Fri Apr 24 08:36:28 UTC 2020
The logs for [lint] [4] will show after the pipeline context has finished.
https://github.com/SeldonIO/seldon-core/blob/gh-pages/jenkins-x/logs/SeldonIO/seldon-core/PR-1730/4.log

impatient try
jx get build logs SeldonIO/seldon-core/PR-1730 --build=4

[seldondev]

Fri Apr 24 08:36:31 UTC 2020
The logs for [pr-build] [3] will show after the pipeline context has finished.
https://github.com/SeldonIO/seldon-core/blob/gh-pages/jenkins-x/logs/SeldonIO/seldon-core/PR-1730/3.log

impatient try
jx get build logs SeldonIO/seldon-core/PR-1730 --build=3

[adriangonz]

Nice one! It makes a lot of sense to expose an OpenAPI schema!

[seldondev]

Fri Apr 24 13:00:03 UTC 2020
The logs for [lint] [6] will show after the pipeline context has finished.
https://github.com/SeldonIO/seldon-core/blob/gh-pages/jenkins-x/logs/SeldonIO/seldon-core/PR-1730/6.log

impatient try
jx get build logs SeldonIO/seldon-core/PR-1730 --build=6

[seldondev]

Fri Apr 24 13:00:15 UTC 2020
The logs for [pr-build] [5] will show after the pipeline context has finished.
https://github.com/SeldonIO/seldon-core/blob/gh-pages/jenkins-x/logs/SeldonIO/seldon-core/PR-1730/5.log

impatient try
jx get build logs SeldonIO/seldon-core/PR-1730 --build=5

[seldondev]

Fri Apr 24 13:34:25 UTC 2020
The logs for [lint] [8] will show after the pipeline context has finished.
https://github.com/SeldonIO/seldon-core/blob/gh-pages/jenkins-x/logs/SeldonIO/seldon-core/PR-1730/8.log

impatient try
jx get build logs SeldonIO/seldon-core/PR-1730 --build=8

[seldondev]

Fri Apr 24 13:34:28 UTC 2020
The logs for [pr-build] [7] will show after the pipeline context has finished.
https://github.com/SeldonIO/seldon-core/blob/gh-pages/jenkins-x/logs/SeldonIO/seldon-core/PR-1730/7.log

impatient try
jx get build logs SeldonIO/seldon-core/PR-1730 --build=7

[adriangonz]

/approve

I think this looks great now and ready to land @axsaucedo!

[seldondev]

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