Merge infra and k3 into one directory again

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.

README.adoc

@@ -11,11 +11,9 @@ The setup is split into 2 dedicated parts:
 
 [source,bash]
 ----
-cd infra
 terraform init
 terraform apply
 sleep 300 # Wait 5 minutes since the machines start _slow_ sometimes
-cd ../k3s
 ansible-galaxy install -r requirements.yml 
 ansible-playbook site.yml
 ----
@@ -27,26 +25,82 @@ ansible-playbook site.yml
 
 == Setup
 
-The project is split into different directories, each responsible for another task.
+The project is split into different steps, each responsible for another task.
-For the initial setup it is mandatory to follow the instructions of each directory in the following order.
-Subsequent changes may only require a subset of these instructions.
-Though, it should be safe to run each step multiple times, they should all be indempotent.
 
-=== infra
+=== terraform
+I use terraform to provide the required infrastructure to run a kubernetes-cluster.
 
-Run this setup in the `infra/` directory.
+[WARNING]
+Make sure `config.auto.tfvars` with all the needed configuration-secrets is present otherwise the module cannot be applied!
+The file is savely stored in the password-manager.
 
-include::./infra/README.adoc[tag=setup]
+[source,bash]
+----
+terraform init # <1>
+terraform apply # <2>
+----
 
-=== k3s
+<1> Init the terraform modules if necessary
+<2> Setup infrastructure and create/update inventory.ini
 
-Run this setup in the `k3s/` directory.
+[WARNING]
+The setup will take longer than just the `terraform apply`, since terraform returns as soon as the machine is provided.
+Though it hasn't been started the machines, yet.
+As a rule of thumb wait ca. 5 minutes after the apply to do other work.
+
+=== ansible
+
+Use ansible to setup a k3s installation and provide a set of foundational services in the cluster.
+The provided services are:
+
+https://cert-manager.io/docs/installation/helm[cert-manager]::
+This allows issuing TLS certificates.
+The certificates are issued via https://letsencrypt.org[let's encrypt] and can be issued for the staging and production stage of let's encrypt.
+
+https://www.min.io[minio]::
+Allow me to store data in an object storage.
++
+TODO: Not setup yet!
+
+https://concourse-ci.org[concourse-ci]::
+A powerful CI-cervice which I like to use to automate all kind of workloads.
++
+TODO: Not setup yet!
+
+https://about.gitea.com[gitea]::
+My personal favourite git-server.
++
+TODO: Not setup yet!
+
+https://github.com/pinterest/snappass[snappass]::
+A secure and reliable tool to share password.
++
+TODO: Not setup yet!
 
 [NOTE]
-The k3s-setup requires a `inventory.ini` which is automatically created by the infra.
+The k3s-setup requires a `inventory.ini` which is automatically created by terraform.
 So, make sure to apply the infra at least once, before running these playbooks.
 
-include::./k3s/README.adoc[tag=setup]
+[source,bash]
+----
+ansible-galaxy install -r requirements.yml # <1>
+ansible-playbook site.yml # <2>
+----
+
+<1> Install required ansible collections to create a k3s-cluster (can be omitted in subsequent runs)
+<2> Install k3s and download kube-config to .kube/config
+
+[IMPORTANT]
+The second step will override any existing kube config, this might destroy any existing settings!
+
+[NOTE]
+--
+To apply the playbook you may need to install additional packages:
+
+* https://helm.sh/docs/intro/install/[helm]
+* https://github.com/databus23/helm-diff?tab=readme-ov-file#install[helm-diff]
+* python3-kubernetes (Debian/Ubuntu)
+--
 
 == Enlarge / Reduce size of cluster
 
@@ -68,7 +122,7 @@ Instead proceed as the following:
 
 == Responsibilities
 
-`infra/`::
+terraform::
 * Creation of network for the kubernetes-cluster
 ** A public subnet exposed to the internet for the kubernetes-servers
 ** A private subnet for the kubernetes-agents
@@ -82,11 +136,9 @@ Instead proceed as the following:
 * Creating the machines for kubernetes-agents in the private subnet
 * Creating DNS-records in Hetzer Cloud
 
-`k3s/`::
+ansible::
 * Setup SSH-connections
 * Setting up routing on all servers
 * Installing k3s
 * Keep the software up-to-date
 * Add foundational services to the cluster
-
-

infra/README.adoc

@@ -1,25 +0,0 @@
-= infra
-:icons: font
-
-This project is responsible for providing the required infra to run a kubernetes-cluster.
-
-== Setup
-
-// tag::setup[]
-[WARNING]
-Make sure `config.auto.tfvars` with all the needed configuration-secrets is present otherwise the module cannot be applied!
-The file is savely stored in the password-manager.
-
-[source,bash]
-----
-terraform init # <1>
-terraform apply # <2>
-----
-
-<1> Init the terraform modules if necessary
-<2> Setup infrastructure and create/update inventory.ini
-
-[WARNING]
-The setup will take longer than just the `terraform apply`, since it will install some.
-As a rule of thumb wait ca. 5 minutes after the apply to do other work.
-// end::setup[]

k3s/README.adoc

@@ -1,56 +0,0 @@
-= k3s
-:icons: font
-
-This project is responsible for setting up a k3s installation and provide a set of foundational services in the cluster.
-The provided services are:
-
-cert-manager::
-This allows issuing TLS certificates.
-The certificates are issued via https://letsencrypt.org[let's encrypt] and can be issued for the staging and production stage of let's encrypt.
-minio::
-
-Allow me to store data in an object storage.
-+
-TODO: Not setup yet!
-
-concourse-ci::
-A powerful CI-cervice which I like to use to automate all kind of workloads.
-+
-TODO: Not setup yet!
-
-gitea::
-My personal favourite git-server.
-+
-TODO: Not setup yet!
-
-snappass::
-A secure and reliable tool to share password.
-+
-TODO: Not setup yet!
-
-== Setup
-
-The setup requires a `inventory.ini` this should be provided by a previous step.
-
-// tag::setup[]
-[source,bash]
-----
-ansible-galaxy install -r requirements.yml # <1>
-ansible-playbook site.yml # <2>
-----
-
-<1> Install required ansible collections to create a k3s-cluster (can be omitted in subsequent runs)
-<2> Install k3s and download kube-config to .kube/config
-
-[IMPORTANT]
-The second step will override any existing kube config, this might destroy any existing settings!
-
-[NOTE]
---
-To apply the playbook you may need to install additional packages:
-
-* https://helm.sh/docs/intro/install/[helm]
-* https://github.com/databus23/helm-diff?tab=readme-ov-file#install[helm-diff]
-* python3-kubernetes (Debian/Ubuntu)
---
-// end::setup[]

main.tf

@@ -58,7 +58,7 @@ module "k8s" {
 }
 
 resource "local_file" "ansible_inventory" {
-  filename = "${path.module}/../k3s/inventory.ini"
+  filename = "${path.module}/inventory.ini"
   content = templatefile("./inventory.ini.tftpl", {
     server_ips   = module.k8s.server_ips_v4,
     agent_ips    = module.k8s.agent_ips_v4,