build cobald image from slurm role, separated tags

roles/slurm/vars/main.yml

@@ -0,0 +1,20 @@
+slurm_nodes_std: # default nodes: controller and submit machine
+- machine: ctl
+  image: slurm:slurmctld
+  exposed_ports: [ "6817:6817/tcp" ]
+- machine: submit1
+  image: slurm:slurmd
+  extra_mounts:
+  - "/home/{{unpriv_user}}/job3/:/mnt/:rw"
+slurm_nodes_exec: | # extend range to execute nodes list
+  {% set slurm_nodes_exec = [] %}
+  {% for i in range(1, num_nodes+1) -%}
+    {% set _ = slurm_nodes_exec.extend([
+      {'machine':'exec%s'|format(i), 'image': 'slurm:slurmd'}]) -%}
+  {%- endfor %}
+  {{ slurm_nodes_exec }}
+slurm_default_mounts:
+- /container/volumes/slurm/:/etc/slurm/:rw
+- /container/volumes/munge/munge.key:/etc/munge/munge.key:rw
+- slurm-shared:/shared/:rw
+