The Nulecule Struggles

I’m working on enabling continuous deployment with help of Nulecule, so that I can have my developer’s edges as well as a series of central environments entertain deployment based on the same triggers.

For those of you outside the inner circle, Nulecule is supposed to abstract deployment to different cloud orchestration providers, whether vanilla Docker, something assisted by Kubernetes, or something as fancy as OpenShift.

In the Kolab Groupware world, orchestration of micro-services is no new challenge. We operate many, many environments that deploy “micro-services” based on (fat) VMs, but the way this works based on (thin) containers is different — there’s no running Puppet inside a container, for instance, or if there is, you’re doing it wrong.

So, aside from the fact we know what our micro-services are across the application suite, the trick is in the orchestration. I have some 25-30 micro-services that require access to a service account’s credentials, because we do not normally allow anonymous binds against LDAP (any exploit anywhere would open you up to reconnaissance otherwise). Currently, setting one container to hold and configure those credentials in a canonical authentication and authorization database and distributing those credentials to the other 24-29 containers doesn’t seem possible without the user or administrator installing Kolab using containers specifying the credentials 25-30 times over.

On a similar note, it is currently not possible to specify what volumes for a Docker container are actually supposed to be persistent storage.

The point to take from this is to appreciate that Kolab is often at the forefront of technologies that have little to do with bouncing back and forth some emails among people that just so happen to share a calendar — in this case specifically, we’re abusing our use-case’s requirements with regards to orchestration to direct the conversation about a unified format to describe such requirements.

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