Adds basic configuration to ec2.ini to support ElastiCache Clusters and Nodes

plugins/inventory/ec2.ini

@@ -47,6 +47,9 @@ route53 = False
 # To exclude RDS instances from the inventory, uncomment and set to False.
 #rds = False
 
+# To exclude ElastiCache instances from the inventory, uncomment and set to False.
+#elasticache = False
+
 # Additionally, you can specify the list of zones to exclude looking up in
 # 'route53_excluded_zones' as a comma-separated list.
 # route53_excluded_zones = samplezone1.com, samplezone2.com
@@ -59,6 +62,12 @@ all_instances = False
 # 'all_rds_instances' to True return all RDS instances regardless of state.
 all_rds_instances = False
 
+# By default, only ElastiCache clusters and nodes in the 'available' state
+# are returned. Set 'all_elasticache_clusters' and/or 'all_elastic_nodes'
+# to True return all ElastiCache clusters and nodes, regardless of state.
+all_elasticache_clusters = False
+all_elasticache_nodes = False
+
 # API calls to EC2 are slow. For this reason, we cache the results of an API
 # call. Set this to the path you want cache files to be written to. Two files
 # will be written to this directory:
@@ -89,6 +98,9 @@ group_by_tag_none = True
 group_by_route53_names = True
 group_by_rds_engine = True
 group_by_rds_parameter_group = True
+group_by_elasticache_engine = True
+group_by_elasticache_cluster = True
+group_by_elasticache_parameter_group = True
 
 # If you only want to include hosts that match a certain regular expression
 # pattern_include = stage-*