Switch Arcus HA test to use 2 x larger workers

Author: Matt Pryor

.github/environments/arcus-ha/inventory/group_vars/all/variables.yml

@@ -12,15 +12,13 @@ infra_flavor_id: >-
 #   The flavor to use for the control plane nodes
 capi_cluster_control_plane_flavor: vm.azimuth.ci.ec1.medium
 #   The flavor to use for worker nodes
-capi_cluster_worker_flavor: vm.azimuth.ci.ec1.medium
+capi_cluster_worker_flavor: vm.azimuth.ci.en1.medium
 
 # Although this is a "HA" test, what we are really testing is the spawning
 # of the CAPI cluster and deployment of Azimuth onto that
-# We have also preferred to use 3 small workers rather than 1 or 2 eighth workers,
-# as they are more likely to fit in the gaps between other workloads
-# So one control plane node and two workers is sufficient for that
+# So one control plane node is sufficient for that
 capi_cluster_control_plane_count: 1
-capi_cluster_worker_count: 3
+capi_cluster_worker_count: 2
 
 # Use a single replica for Consul
 # The risk of failed upgrades is too great, and it is going away soon
@@ -35,4 +33,4 @@ velero_backup_schedule_name: default
 velero_backup_schedule_timings: "0 0 * * *"
 velero_backup_schedule_ttl: "168h"
 velero_aws_access_key_id: required-but-not-used
-velero_aws_secret_access_key : required-but-not-used
+velero_aws_secret_access_key : required-but-not-used

.github/environments/leafcloud-ha/inventory/group_vars/all/variables.yml

@@ -34,3 +34,14 @@ capi_cluster_addons_csi_cinder_volume_type: unencrypted
 # Use a single replica for Consul
 # The risk of failed upgrades is too great, and it is going away soon
 consul_server_replicas: 1
+
+# Enable Velero just to check that installation works
+velero_enabled: true
+velero_s3_url: https://required-but-not-used.com
+velero_bucket_name: not-used
+velero_backup_schedule_enabled: true
+velero_backup_schedule_name: default
+velero_backup_schedule_timings: "0 0 * * *"
+velero_backup_schedule_ttl: "168h"
+velero_aws_access_key_id: required-but-not-used
+velero_aws_secret_access_key : required-but-not-used