Update DB engine list (#548)

Author: wata727

rules/aws_db_instance_invalid_engine.go

@@ -23,23 +23,28 @@ func NewAwsDBInstanceInvalidEngineRule() *AwsDBInstanceInvalidEngineRule {
 		resource:      "aws_db_instance",
 		attributeName: "engine",
 		engines: map[string]bool{
-			// https://docs.aws.amazon.com/cli/latest/reference/rds/describe-db-engine-versions.html#options
-			"aurora":            true,
-			"aurora-mysql":      true,
-			"aurora-postgresql": true,
-			"mariadb":           true,
-			"mysql":             true,
-			"oracle-ee":         true,
-			"oracle-ee-cdb":     true,
-			"oracle-se2":        true,
-			"oracle-se2-cdb":    true,
-			"oracle-se1":        true,
-			"oracle-se":         true,
-			"postgres":          true,
-			"sqlserver-ee":      true,
-			"sqlserver-se":      true,
-			"sqlserver-ex":      true,
-			"sqlserver-web":     true,
+			// https://docs.aws.amazon.com/AmazonRDS/latest/APIReference/API_CreateDBInstance.html#API_CreateDBInstance_RequestParameters
+			"aurora":               true,
+			"aurora-mysql":         true,
+			"aurora-postgresql":    true,
+			"mariadb":              true,
+			"mysql":                true,
+			"oracle-ee":            true,
+			"oracle-ee-cdb":        true,
+			"custom-oracle-ee":     true,
+			"custom-oracle-ee-cdb": true,
+			"oracle-se2":           true,
+			"oracle-se2-cdb":       true,
+			"oracle-se1":           true,
+			"oracle-se":            true,
+			"postgres":             true,
+			"sqlserver-ee":         true,
+			"sqlserver-se":         true,
+			"sqlserver-ex":         true,
+			"sqlserver-web":        true,
+			"custom-sqlserver-ee":  true,
+			"custom-sqlserver-se":  true,
+			"custom-sqlserver-web": true,
 		},
 	}
 }