feat(demo): Demo server

[gaocegege]

Description

Ref https://goharbor.io/docs/1.10/install-config/demo-server/

The demo server is cleaned and reset every two days.

We could have a demo server for envd-server on Kubernetes, and envd dashboard.

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[kemingy]

Explore:

• cloud service
• how to deploy our demo service
• our remote builder

[kemingy]

After trying the harbor demo service, I think there are several things for us to do:

1. serve and expose the envd dashboard frontend to public
2. the envd server should run in noauth: false mode (weird name, I think auth: true is better), users are required to sign up and log in
3. provide the tutorial for users to create the context and access the envd server
4. set restrictions

• image size (need to develop [optional])
• number of environments (need to develop the global limit)
• CPU/GPU/Memory for each environment (need to develop the global maximum limit)
• destroy all the environment every midnight (maybe a cron job)
• collect idle environment aggressively (need to develop)

Requirements for the service:

• should be able to access APT/PyPI/GitHub/S3
• GPUs (TBD)
• could be a single VM or a Kubernetes cluster

Candidates:

• AWS https://aws.amazon.com/activate/
• Azure https://startups.microsoft.com/blog/credit-levels/
• GCP https://cloud.google.com/startup

I only tried GKE before. For such a demo service, VM with kind should also be possible.

Deployment:

• if the Kubernetes cluster is ready, we only need to install the Helm chart and set up the cron job
• need to configure the exposed port

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Remote builder requirements:

• network access
• disk for local cache
• related to feat: Context redesign envd#1309

[gaocegege]

https://demo.questdb.io/

Here is another demo server example.

[kemingy]

https://demo.questdb.io/

Here is another demo server example.

It's a read-only demo.

We can also disable the user sign-up and provide only one demo user.

Users can use envd build --push to build their images locally and push them to the docker registry. But some of them may suffer from network issues.

[VoVAllen]

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