How to get Ratel in a kubernetes cluster?

Users Ratel
1

Hi, I’m following instructions in https://dgraph.io/docs/deploy/kubernetes/ for deploying DGraph in a cluster but in the documentation all the time there are mentions to Ratel while there was this PR chore(test): Remove Ratel from tests and example configs. by danielmai · Pull Request #7738 · dgraph-io/dgraph · GitHub that removed Ratel precisely of the Kubernetes receipts.

So my question is, how can I bring back Ratel to my kubernetes cluster?

2

There is a new image for Ratel separately. And also you can always use http://play.dgraph.io/.

3

Ok, I guess it is this one: Docker Hub . Any document that explains how to link it to the cluster? I’m not very proficient with neither kubernetes nor Dgraph since I just want a quick receipt for testing a PoC.

4

Just get the old version of the YAML, where you can find the ratel there, and change the image from Dgraph to Ratel.

5

If you use Helm, you can run this:

helm repo add dgraph https://charts.dgraph.io
helm install "dev" dgraph/dgraph --set ratel.enabled=true

More Info:

1 Like
6

Using --set ratel.enabled=true does work, but deploys the older v20.11.3 image. Instead you can use these three arguments to get the latest from the standalone ratel repo:

–set ratel.enabled=true,ratel.image.repository=“dgraph/ratel”,ratel.image.tag=“v21.03.0”

7

Correct. I thought it was changed over to the new image, I made a PR to change that, and hopefully it’ll get some attention.

With all the values, may be easier to use a config file:

cat <<-EOF > values.yaml
ratel:
  enabled: true
  image:
    repository: dgraph/ratel
    tag: v21.03.0
EOF

helm install test dgraph/dgraph --values value.yaml

@MichelDiz @dmai Please merge this PR and push up a new chart version. I an get on a zoom call to walk through the process if needed, as I am not authorized to create tags.

1 Like