CI: Document the 'all-in-one' layout + small refactoring (#10725)

* Rename aio to all-in-one and document it

ADTM.
Acronyms don't tell much.

* Refactor vm_count in tests provisioning

tests/cloud_playbooks/roles/packet-ci/defaults/main.yml

@@ -18,7 +18,7 @@ memory_allocation_ratio: 1
 inventory_path: "/tmp/{{ test_name }}/inventory"
 
 # Deployment mode
-mode: aio
+mode: all-in-one
 
 # Cloud init config for each os type
 # distro: fedora -> 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

tests/cloud_playbooks/roles/packet-ci/tasks/main.yml

@@ -3,10 +3,6 @@
 - name: "Include custom vars for ci job: {{ ci_job_name }}"
   include_vars: "../files/{{ ci_job_name }}.yml"
 
-- name: Set VM count needed for CI test_id
-  set_fact:
-    vm_count: "{%- if mode in ['separate', 'separate-scale', 'ha', 'ha-scale', 'ha-recover', 'ha-recover-noquorum'] -%}{{ 3 | int }}{%- elif mode == 'aio' -%}{{ 1 | int }}{%- else -%}{{ 2 | int }}{%- endif -%}"
-
 - name: Cleamup old VMs
   import_tasks: cleanup-old-vms.yml
 

tests/cloud_playbooks/roles/packet-ci/templates/inventory.j2

@@ -33,7 +33,7 @@ instance-2
 
 [etcd]
 instance-1
-{% elif mode == "aio" %}
+{% elif mode == "all-in-one" %}
 [kube_control_plane]
 instance-1
 

tests/cloud_playbooks/roles/packet-ci/vars/main.yml

@@ -0,0 +1,12 @@
+---
+_vm_count_dict:
+  separate: 3
+  separate-scale: 3
+  ha: 3
+  ha-scale: 3
+  ha-recover: 3
+  ha-recover-noquorum: 3
+  all-in-one: 1
+  default: 2
+
+vm_count: "{{ _vm_count_dict[mode | d('default')] }}"