This change adds longhorn, an addition to Kubernetes that adds the
ability to use distributed storage over all nodes to the cluster.
Note, that I tried that in December already but due to very high load on
the machines I rolled _everything_ back. Though, it turned out that the
high load was not because of longhorn, but instead because of bad
configuration of the server, as described in the see-also commit.
Reference: https://longhorn.io/
Reference: https://longhorn.io/docs/1.10.1/deploy/install/install-with-helm/
See-also: 4b8a3d12c4 Use etcd instead of sqlite for k3s-server
This change is huge, therefore I only sum up the most important changes:
* Improve spelling
* Reduce ambiguity
* Use OpenTofu instead of Terraform
* Document missing tags for Ansible
* Provide example-configuration
* Fix confusion between dotenv and direnv, I use direnv!
* Add section about required software
* Many spelling mistakes
I'm oversaw completely, that I have to change the SSH-port for all nodes
in the cluster otherwise I cannot provide a meaningful load-balancer for
the git-ssh port in it.
Additionally this allowed me to fix some config errors which I simply
oversaw.
The previous setting of tags still let ansible gather facts for the
roles in question, even though they're not executed. This fix prevent
this from happening.
Since I don't have multiple terraform steps anymore it simply doesn't
make sense to me anymore to split all tasks into separate folders.
Instead I try to be as clear as possible in the README to make it easy
to follow the structure in the future without too much headache.
