docs: Add is_set/is_not_set

hashicorp · Nov 14, 2018 · 981dd2e · 981dd2e
1 parent 60f80fe
commit 981dd2e
Showing 1 changed file with 8 additions and 0 deletions.
diff --git a/website/source/docs/job-specification/constraint.html.md b/website/source/docs/job-specification/constraint.html.md
@@ -85,6 +85,8 @@ all groups (and tasks) in the job.
     regexp
     set_contains
     version
+    is_set
+    is_not_set
     ```
 
     For a detailed explanation of these values and their behavior, please see
@@ -196,6 +198,12 @@ constraint {
     }
     ```
 
+- `"is_set"` - Specifies that a given attribute must be present. This can be
+  used with features like `!=` to require that an attribute has been configured,
+  but to omit particular values.
+
+- `"is_not_set"` - Specifies that a given attribute must not be present. 
+
 ## `constraint` Examples
 
 The following examples only show the `constraint` stanzas. Remember that the