Simple Karydia Installation Option

[marwinski]

Story

As a user I want to have a simple installation option and not a multi-stage manual process.

Implementation Proposal

helm appears to be the natural installation option. In addition some scripts will be required to generate the certificates and include them into the values.yaml file.

If not too complex we can ask the user to install the tools locally (although the tools are even a challenge on a Mac). Easier would be a container

docker run karydia/karydia-configure -v .:/config

[Neumann-Nils]

Helm seems to be the natural installation option. However, it seems quite difficult to integrate the karydia installation process into the helm framework.

While I had a look at helm, I could not find a way to run local scripts within the helm installation process. The only option might be to use hooks (https://github.com/helm/helm/blob/master/docs/charts_hooks.md), which spin up a pod and run certain commands and scripts within this pod. However, I could not get the whole installation process running. At the end, I settled with the following problems:

• In general, it seems cumbersome to get kubectl configured and execute the needed commands from within the pod
• "pre-install" hooks cannot use volume mounts, as they are loaded after these hooks are initiated

In general, it could be possible to get a karydia installation running using only helm. However, other options seems more trivial and in the end may be equally user-friendly. Thus, I suggest two different options to consider:

• Create a bash script that runs the karydia installation, while making use of helm for the manifests (this would not work on Windows)
• Put everything together into a docker image and automate the installation in this way

[marwinski]

We use bash and/or python ad/or spiff++ for creating the Values.yaml files. Agreed this is hard to do with helm and not really useful. I think short term a script is absolutely fine that creates the values.yaml. A container is nice to have (and not all that difficult). It will also be useful when we have a controller to automatically install Karydia.