Hi, A docker image for Cassandra would be the first step in the right direction. What one would really want is a kubernetes Operator that can deploy, upgrade, etc. a Cassandra cluster (https://kubernetes.io/docs/concepts/extend-kubernetes/operator).
A base image with placeholders would be neat for people to quickly start using Cassandra. We have built our own image (actually a few of them over the time) and also use it e.g. for cqlsh (docker run -it —rm —entrypoint cqlsh <image> —help). What one would probably do in the end is building their own image based on the official one adding a layer with the configuration file, certificates, etc (or mounting them from a configmap in kubernetes). Some things to consider for the image: • Special care must be taken to make the image usable in OpenShift as it does not run the processes in the containers as root. • Logging should be changed to stdout so that it is easier to use and automatically picked up by log indexers of kubernetes clusters. • As for metrics, exposing Prometheus endpoint with them would be great as this makes scraping them just a matter of meta configuration of the pods (telling Prometheus the actual endpoint to scrape) • I had issues with Cassandra binding on the wrong IP in a container Would be happy to help with the image part / testing on OpenShift. Cheers, Dimo > On 19. Sep 2019, at 18:32, Nate McCall <zznat...@gmail.com> wrote: > > Hi Cyril, > Thanks for bringing this topic up. I think it would be a good idea for us > to have an "official" docker file in the source tree. > > There are, however, some caveats: > https://issues.apache.org/jira/browse/LEGAL-270?focusedCommentId=15524446&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-15524446 > > As long as we could adhere to those guidelines (which I don't see as hard) > we could do this. > > In looking through your specific image (thanks for posting this, btw), I > would personally prefer something with a lot fewer dependencies (basically > from just our source tree) and a lot more replacement properties available > for config files. > > Curious what other folks think? > > Cheers, > -Nate > >> On Wed, Sep 18, 2019 at 6:43 AM Cyril Scetbon <cyril.scet...@free.fr> wrote: >> >> Hey guys, >> >> I heard that at the last summit there were discussions about providing an >> official docker image to run Cassandra on Kubernetes. Is it something that >> you’ve started to work on ? We have our own at >> https://github.com/Orange-OpenSource/cassandra-image < >> https://github.com/Orange-OpenSource/cassandra-image> but I think >> providing an official image makes sense. As long as we can easily do >> everything we do today. We could also collaborate. >> >> Thank you >> — >> Cyril Scetbon >> >>
