Add option to give extra args to packer build command

Author: m-bull

roles/image_build/defaults/main.yml

@@ -14,6 +14,9 @@ image_build_metadata: {}
 # The directory that contains the openstack.pkr.hcl to build the Slurm image
 image_build_packer_root_path: "{{ playbook_dir }}/vendor/stackhpc/ansible-slurm-appliance/packer"
 
+# Extra args to pass to the packer build command
+image_build_packer_extra_args: ""
+
 # Vars to apply to the builder group
 image_build_builder_group_vars:
   update_log_path: /tmp/update_log

roles/image_build/tasks/main.yml

@@ -64,7 +64,7 @@
 - name: Build image with packer
   command:
     cmd: |
-      packer build -only openstack.openhpc -var-file={{ pkrvars_hcl_file.path }} openstack.pkr.hcl
+      packer build {{ image_build_packer_extra_args }} -only openstack.openhpc -var-file={{ pkrvars_hcl_file.path }} openstack.pkr.hcl
     chdir: "{{ image_build_packer_root_path }}"
   environment:
     ANSIBLE_CONFIG: "{{ ansible_cfg_file.path }}"