chore(test): Remove Ratel from tests and example configs.

[danielmai]

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This change is 

[darkn3rd]

Have all of the contributions been tested as functional:

• CloudFormation (contrib/config/marketplace)
• Backups (client, gcp, azure, nfs, s3)
• Kubernetes (single, ha)
• Terraform / AWS (contrib/config/terraform/aws)
• Terraform / GCP (contrib/config/terraform/gcp)
• Terrafrom / K8S (contrib/config/terraform/kubernetes)
• Systemd / CentOS (contrib/systemd/centos)
• Standalone

[1Const1]

Could you please explain why you removed ratel everywhere? If someone want it they can do it by themselves

[aranwe]

I assume these configs are used in CI - however they are directly linked from documentation: https://dgraph.io/docs/deploy/kubernetes/ and without Ratel the Test Single Server Setup (and the Test Dgraph HA Cluster Setup ) doesn't work :)

[tonicebrian]

I assume these configs are used in CI - however they are directly linked from documentation: https://dgraph.io/docs/deploy/kubernetes/ and without Ratel the Test Single Server Setup (and the Test Dgraph HA Cluster Setup ) doesn't work :)

I'm exactly at this point. Trying to test DGraph following those instructions and stuck because I haven't Ratel. How can I install it in any of those clusters?

[danhawkins]

Not sure how to get a browser UI up for docker compose now ratel is moved 😕

[rzyns]

If Ratel is removed from all of the example configs, shouldn't the documentation be updated? I'd be happy to submit a PR removing references to Ratel in the documentation if someone wants to point me in the right direction. OTOH, I think it might be better if there were alternative instructions, and I'm still just getting my feet wet with dgraph

[BrunoPujos]

Hello,

So I have a small project where I need a graph database and I decided to try and use DGraph for it. I never used it before so please keep in mind that I have no idea how your software works. Anyway I tried to follow your tutorials:

• https://dgraph.io/docs/get-started/
• https://www.youtube.com/watch?v=u73ovhDCPQQ&ab_channel=DgraphLabs

Both of those (which seems the official ones, if I'm correct) encourage to use Ratel, however your last release does not seems to include Ratel. It seems to have been deleted by this PR. It is absolutely not clear to me why it has been removed or if there is any replacement. I suppose there is a good reason for this but, from a new user point of view, this is really disturbing. If the experience for new user is an important point for you, you may want to either: update your tutorials or make a docker version with Ratel specifically for your tutorials.

Anyway for people encountering this same problem, running: docker run --rm -it -p "8080:8080" -p "9080:9080" -p "8000:8000" -v ~/dgraph:/dgraph "dgraph/standalone:v21.03.0" (so the release before the last one at the time of this comment) seems to work just fine.

Have a nice day.