Simplify configuration by moving all the vars into config.ini

The navigation through a bunch of config files, all with just a few
lines in it is cumbersome. This change moves all the configuration into
a centralized `config.ini` that way it's easier for me to get a quick
overview of the setup. The `config.ini` acts as another inventory and is
therefore references as such by the ansible.cfg. The `inventory.ini`
(which is generated by terraform in the provisioning-step) is not
affected by this change.

k3s/roles/kube-config/tasks/main.yml

@@ -2,18 +2,18 @@
   fetch:
     src: /etc/rancher/k3s/k3s.yaml
     dest: "{{ lookup('env', 'HOME') }}/.kube/config.orig"
-    flat: true
+    flat: True
   register: loaded_kube_config
 - name: Copy kube-config to correct location
   delegate_to: localhost
   copy:
     src: "{{ lookup('env', 'HOME') }}/.kube/config.orig"
     dest: "{{ lookup('env', 'HOME') }}/.kube/config"
-  when: hostvars[groups['server'][0]]['loaded_kube_config'] is changed
+  when: loaded_kube_config is changed
 - name: Use correct ip-address for k8s-cluster
   delegate_to: localhost
   lineinfile:
     path: "{{ lookup('env', 'HOME') }}/.kube/config"
     regexp: '^(\s*server: https://).*(:\d+)$'
-    line: \g<1>{{ hostvars[groups['server'][0]]['api_endpoint'] }}\g<2>
+    line: \g<1>{{ k8s_api_endpoint }}\g<2>
     backrefs: yes