Use new constraints template

elasticsearch.nomad.hcl

@@ -7,11 +7,7 @@ job "[[ .instance ]]" {
 
     count = [[ $c.count ]]
 
-    # Ensure all instances run on different nodes
-    constraint {
-      operator = "distinct_hosts"
-      value    = "true"
-    }
+[[ template "common/constraints" $c ]]
 
     # Wait a few seconds between service deregistration from consul catalog and task kill
     shutdown_delay = "6s"

variables.yml

@@ -42,6 +42,11 @@ elasticsearch:
         # Publish the node addr in the metadata of the service
         addr: 'es-${NOMAD_ALLOC_INDEX}.[[ .instance ]][[ .consul.suffix ]].service.[[ .consul.domain ]]'
 
+    nomad:
+      constraints:
+        - operator: distinct_hosts
+          value: true
+
     # Resource allocation
     resources:
       cpu: 300