use RL8.7 'fat' image with no releasever pinning + workaround for singularity

Author: sjpb

environments/arcus/builder.pkrvars.hcl

@@ -1,6 +1,7 @@
 flavor = "vm.alaska.cpu.general.small"
 networks = ["a262aabd-e6bf-4440-a155-13dbc1b5db0e"] # WCDC-iLab-60
-source_image_name = "openhpc-221118-1422.qcow2"
+source_image_name = "openhpc-230104-1319.qcow2" # https://github.com/stackhpc/slurm_image_builder/pull/13
+#source_image_name = "Rocky-8-GenericCloud-Base-8.7-20221130.0.x86_64.qcow2"
 ssh_keypair_name = "slurm-app-ci"
 security_groups = ["default", "SSH"]
 ssh_bastion_host = "128.232.222.183"

environments/arcus/terraform/main.tf

@@ -17,7 +17,8 @@ variable "create_nodes" {
 variable "cluster_image" {
     description = "single image for all cluster nodes - a convenience for CI"
     type = string
-    default = "openhpc-221118-1422.qcow2" # https://github.com/stackhpc/slurm_image_builder/pull/12
+    default = "openhpc-230104-1319.qcow2" # https://github.com/stackhpc/slurm_image_builder/pull/13
+    # default = "Rocky-8-GenericCloud-Base-8.7-20221130.0.x86_64.qcow2"
 }
 
 module "cluster" {