Add host group solver

geneve/solver/group_host.py

@@ -0,0 +1,40 @@
+# Licensed to Elasticsearch B.V. under one or more contributor
+# license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright
+# ownership. Elasticsearch B.V. licenses this file to you under
+# the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# 	http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+"""Host group constraints solver."""
+
+import random
+
+from faker import Faker
+
+from geneve.solver import emit_field, solver
+
+# https://faker.readthedocs.io/en/master/index.html#seeding-the-generator
+faker = Faker()
+faker.seed_instance(random.random())
+
+
+@solver("host.")
+def resolve_host_group(doc, group, fields, schema, env):
+    for field, constraints in fields.items():
+        if field == "mac":
+            emit_field(doc, f"{group}.mac", faker.mac_address())
+            continue
+        if field == "name":
+            emit_field(doc, f"{group}.name", faker.hostname())
+            continue
+        solver.solve_field(doc, group, field, constraints, schema, env)