Remove datasource option from SQL module and add tests

metricbeat/docs/modules/sql.asciidoc

@@ -8,7 +8,7 @@ This file is generated! See scripts/mage/docs_collector.go
 
 beta[]
 
-This is the sql module that fetches metrics from a SQL database. You can define driver, datasource and SQL query.
+This is the sql module that fetches metrics from a SQL database. You can define driver and SQL query.
 
 
 
@@ -26,10 +26,9 @@ metricbeat.modules:
   metricsets:
     - query
   period: 10s
-  hosts: ["localhost"]
+  hosts: ["user=myuser password=mypassword dbname=mydb sslmode=disable"]
 
   driver: "postgres"
-  datasource: "user=myuser password=mypassword dbname=mydb sslmode=disable"
   sql_query: "select now()"
 
 ----

metricbeat/mb/testing/fetcher.go

@@ -26,8 +26,7 @@ import (
 
 // Fetcher is an interface implemented by all fetchers for testing purpouses
 type Fetcher interface {
-	Module() mb.Module
-	Name() string
+	mb.MetricSet
 
 	FetchEvents() ([]mb.Event, []error)
 	WriteEvents(testing.TB, string)

x-pack/metricbeat/metricbeat.reference.yml

@@ -965,10 +965,9 @@ metricbeat.modules:
   metricsets:
     - query
   period: 10s
-  hosts: ["localhost"]
+  hosts: ["user=myuser password=mypassword dbname=mydb sslmode=disable"]
 
   driver: "postgres"
-  datasource: "user=myuser password=mypassword dbname=mydb sslmode=disable"
   sql_query: "select now()"
 
 

x-pack/metricbeat/module/sql/_meta/config.yml

@@ -2,9 +2,8 @@
   metricsets:
     - query
   period: 10s
-  hosts: ["localhost"]
+  hosts: ["user=myuser password=mypassword dbname=mydb sslmode=disable"]
 
   driver: "postgres"
-  datasource: "user=myuser password=mypassword dbname=mydb sslmode=disable"
   sql_query: "select now()"
 

x-pack/metricbeat/module/sql/_meta/docs.asciidoc

@@ -1,3 +1,3 @@
-This is the sql module that fetches metrics from a SQL database. You can define driver, datasource and SQL query.
+This is the sql module that fetches metrics from a SQL database. You can define driver and SQL query.
 
 

x-pack/metricbeat/module/sql/docker-compose.yml

@@ -0,0 +1,12 @@
+version: '2.3'
+
+services:
+  mysql:
+    extends:
+      file: ../../../../metricbeat/module/mysql/docker-compose.yml
+      service: mysql
+
+  postgresql:
+    extends:
+      file: ../../../../metricbeat/module/postgresql/docker-compose.yml
+      service: postgresql

x-pack/metricbeat/module/sql/query/_meta/data.json

@@ -1,26 +1,30 @@
 {
-    "@timestamp":"2016-05-23T08:05:34.853Z",
-    "beat":{
-        "hostname":"beathost",
-        "name":"beathost"
+    "@timestamp": "2017-10-12T08:05:34.853Z",
+    "event": {
+        "dataset": "sql.query",
+        "duration": 115000,
+        "module": "sql"
     },
-    "metricset":{
-        "host":"localhost",
-        "module":"sql",
-        "name":"query",
-        "rtt":44269
+    "metricset": {
+        "name": "query",
+        "period": 10000
     },
-    "sql":{
-        "metrics":{
-           "numeric":{
-              "mynumericfield":1
-           },
-           "string":{
-              "mystringfield":"abc"
-           }
+    "service": {
+        "address": "172.22.0.3:3306",
+        "type": "sql"
+    },
+    "sql": {
+        "driver": "mysql",
+        "metrics": {
+            "numeric": {
+                "table_rows": 6
+            },
+            "string": {
+                "engine": "InnoDB",
+                "table_name": "sys_config",
+                "table_schema": "sys"
+            }
         },
-        "driver":"postgres",
-        "query":"select * from mytable"
-     },
-    "type":"metricsets"
+        "query": "select table_schema, table_name, engine, table_rows from information_schema.tables where table_rows \u003e 0;"
+    }
 }

x-pack/metricbeat/module/sql/query/_meta/data_postgres.json

@@ -0,0 +1,45 @@
+{
+    "@timestamp": "2017-10-12T08:05:34.853Z",
+    "event": {
+        "dataset": "sql.query",
+        "duration": 115000,
+        "module": "sql"
+    },
+    "metricset": {
+        "name": "query",
+        "period": 10000
+    },
+    "service": {
+        "address": "172.22.0.2:5432",
+        "type": "sql"
+    },
+    "sql": {
+        "driver": "postgres",
+        "metrics": {
+            "numeric": {
+                "blk_read_time": 0,
+                "blk_write_time": 0,
+                "blks_hit": 1923,
+                "blks_read": 111,
+                "conflicts": 0,
+                "datid": 12379,
+                "deadlocks": 0,
+                "numbackends": 1,
+                "temp_bytes": 0,
+                "temp_files": 0,
+                "tup_deleted": 0,
+                "tup_fetched": 1249,
+                "tup_inserted": 0,
+                "tup_returned": 1356,
+                "tup_updated": 0,
+                "xact_commit": 18,
+                "xact_rollback": 0
+            },
+            "string": {
+                "datname": "postgres",
+                "stats_reset": "2020-01-21 11:23:56.53"
+            }
+        },
+        "query": "select * from pg_stat_database"
+    }
+}

x-pack/metricbeat/module/sql/query/dsn.go

@@ -0,0 +1,42 @@
+// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+// or more contributor license agreements. Licensed under the Elastic License;
+// you may not use this file except in compliance with the Elastic License.
+
+package query
+
+import (
+	"net/url"
+
+	"github.com/go-sql-driver/mysql"
+
+	"github.com/elastic/beats/metricbeat/mb"
+)
+
+// ParseDSN tries to parse the host
+func ParseDSN(mod mb.Module, host string) (mb.HostData, error) {
+	// TODO: Add support for `username` and `password` as module options
+
+	sanitized := sanitize(host)
+
+	return mb.HostData{
+		URI:          host,
+		SanitizedURI: sanitized,
+		Host:         sanitized,
+	}, nil
+}
+
+func sanitize(host string) string {
+	// Host is a standard URL
+	if url, err := url.Parse(host); err == nil && len(url.Host) > 0 {
+		return url.Host
+	}
+
+	// Host is a MySQL DSN
+	if config, err := mysql.ParseDSN(host); err == nil {
+		return config.Addr
+	}
+
+	// TODO: Add support for PostgreSQL connection strings and other formats
+
+	return "(redacted)"
+}

x-pack/metricbeat/module/sql/query/query.go

@@ -10,21 +10,22 @@ import (
 	"strings"
 	"time"
 
+	"github.com/jmoiron/sqlx"
 	"github.com/pkg/errors"
 
 	"github.com/elastic/beats/libbeat/common"
 	"github.com/elastic/beats/libbeat/common/cfgwarn"
 	"github.com/elastic/beats/metricbeat/mb"
-
-	"github.com/jmoiron/sqlx"
 )
 
 // init registers the MetricSet with the central registry as soon as the program
 // starts. The New function will be called later to instantiate an instance of
 // the MetricSet for each host defined in the module's configuration. After the
 // MetricSet has been created then Fetch will begin to be called periodically.
 func init() {
-	mb.Registry.MustAddMetricSet("sql", "query", New)
+	mb.Registry.MustAddMetricSet("sql", "query", New,
+		mb.WithHostParser(ParseDSN),
+	)
 }
 
 // MetricSet holds any configuration or state information. It must implement
@@ -33,9 +34,8 @@ func init() {
 // interface methods except for Fetch.
 type MetricSet struct {
 	mb.BaseMetricSet
-	Driver     string
-	Datasource string
-	Query      string
+	Driver string
+	Query  string
 }
 
 // New creates a new instance of the MetricSet. New is responsible for unpacking
@@ -44,9 +44,8 @@ func New(base mb.BaseMetricSet) (mb.MetricSet, error) {
 	cfgwarn.Beta("The sql query metricset is beta.")
 
 	config := struct {
-		Driver     string `config:"driver"`
-		Datasource string `config:"datasource"`
-		Query      string `config:"sql_query"`
+		Driver string `config:"driver"`
+		Query  string `config:"sql_query"`
 	}{}
 
 	if err := base.Module().UnpackConfig(&config); err != nil {
@@ -56,7 +55,6 @@ func New(base mb.BaseMetricSet) (mb.MetricSet, error) {
 	return &MetricSet{
 		BaseMetricSet: base,
 		Driver:        config.Driver,
-		Datasource:    config.Datasource,
 		Query:         config.Query,
 	}, nil
 }
@@ -65,7 +63,7 @@ func New(base mb.BaseMetricSet) (mb.MetricSet, error) {
 // format. It publishes the event which is then forwarded to the output. In case
 // of an error set the Error field of mb.Event or simply call report.Error().
 func (m *MetricSet) Fetch(report mb.ReporterV2) error {
-	db, err := sqlx.Open(m.Driver, m.Datasource)
+	db, err := sqlx.Open(m.Driver, m.HostData().URI)
 	if err != nil {
 		return errors.Wrap(err, "error opening connection")
 	}