[metricbeat][mysql] Add SSL support

CHANGELOG.next.asciidoc

@@ -225,6 +225,7 @@ Setting environmental variable ELASTIC_NETINFO:false in Elastic Agent pod will d
 - Add a `/inputs/` route to the HTTP monitoring endpoint that exposes metrics for each metricset instance. {pull}36971[36971]
 - Add linux IO metrics to system/process {pull}37213[37213]
 - Add new memory/cgroup metrics to Kibana module {pull}37232[37232]
+- Add SSL support to mysql module {pull}37997[37997]
 
 
 *Metricbeat*

metricbeat/docs/modules/mysql.asciidoc

@@ -89,7 +89,18 @@ metricbeat.modules:
 
   # By setting raw to true, all raw fields from the status metricset will be added to the event.
   #raw: false
-----
+
+  # Optional SSL/TLS. By default is false.
+  #ssl.enabled: true
+
+  # List of root certificates for SSL/TLS server verification
+  #ssl.certificate_authorities: ["/etc/pki/root/ca.crt"]
+
+  # Certificate for SSL/TLS client authentication
+  #ssl.certificate: "/etc/pki/client/cert.crt"
+
+  # Client certificate key file
+  #ssl.key: "/etc/pki/client/cert.key"----
 
 [float]
 === Metricsets

metricbeat/metricbeat.reference.yml

@@ -764,6 +764,17 @@ metricbeat.modules:
   # By setting raw to true, all raw fields from the status metricset will be added to the event.
   #raw: false
 
+  # Optional SSL/TLS. By default is false.
+  #ssl.enabled: true
+
+  # List of root certificates for SSL/TLS server verification
+  #ssl.certificate_authorities: ["/etc/pki/root/ca.crt"]
+
+  # Certificate for SSL/TLS client authentication
+  #ssl.certificate: "/etc/pki/client/cert.crt"
+
+  # Client certificate key file
+  #ssl.key: "/etc/pki/client/cert.key"
 #--------------------------------- NATS Module ---------------------------------
 - module: nats
   metricsets:

metricbeat/module/mysql/_meta/Dockerfile

@@ -5,4 +5,8 @@ ENV MYSQL_ROOT_PASSWORD test
 
 HEALTHCHECK --interval=1s --retries=90 CMD mysql -u root -p$MYSQL_ROOT_PASSWORD -h$HOSTNAME -P 3306 -e "SHOW STATUS" > /dev/null
 
+COPY /certs/root-ca.pem /etc/certs/root-ca.pem
+COPY /certs/server-cert.pem /etc/certs/server-cert.pem
+COPY /certs/server-key.pem /etc/certs/server-key.pem
+
 COPY test.cnf /etc/mysql/conf.d/test.cnf

metricbeat/module/mysql/_meta/certs/client-cert.pem

@@ -0,0 +1,19 @@
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+-----END CERTIFICATE-----

metricbeat/module/mysql/_meta/certs/client-key.pem

@@ -0,0 +1,28 @@
+-----BEGIN PRIVATE KEY-----
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+-----END PRIVATE KEY-----

metricbeat/module/mysql/_meta/certs/client-req.pem

@@ -0,0 +1,16 @@
+-----BEGIN CERTIFICATE REQUEST-----
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+-----END CERTIFICATE REQUEST-----

metricbeat/module/mysql/_meta/certs/root-ca-key.pem

@@ -0,0 +1,28 @@
+-----BEGIN PRIVATE KEY-----
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+-----END PRIVATE KEY-----

metricbeat/module/mysql/_meta/certs/root-ca.pem

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metricbeat/module/mysql/_meta/certs/server-cert.pem

@@ -0,0 +1,19 @@
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----

metricbeat/module/mysql/_meta/certs/server-key.pem

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+-----BEGIN PRIVATE KEY-----
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+2I6Jo9vwMjAdOxHTalqMllDvBj5S5+cX38kGdcxdcbAiUHwIoXy6cjcGbeO/SesR
+L1bbyZA45gpsWFxFr5V67G0=
+-----END PRIVATE KEY-----

metricbeat/module/mysql/_meta/certs/server-req.pem

@@ -0,0 +1,16 @@
+-----BEGIN CERTIFICATE REQUEST-----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+-----END CERTIFICATE REQUEST-----

metricbeat/module/mysql/_meta/config.reference.yml

@@ -21,3 +21,15 @@
 
   # By setting raw to true, all raw fields from the status metricset will be added to the event.
   #raw: false
+
+  # Optional SSL/TLS. By default is false.
+  #ssl.enabled: true
+
+  # List of root certificates for SSL/TLS server verification
+  #ssl.certificate_authorities: ["/etc/pki/root/ca.crt"]
+
+  # Certificate for SSL/TLS client authentication
+  #ssl.certificate: "/etc/pki/client/cert.crt"
+
+  # Client certificate key file
+  #ssl.key: "/etc/pki/client/cert.key"

metricbeat/module/mysql/_meta/config.yml

@@ -18,3 +18,15 @@
 
   # Password of hosts. Empty by default.
   #password: secret
+
+  # Optional SSL/TLS. By default is false.
+  #ssl.enabled: true
+
+  # List of root certificates for SSL/TLS server verification
+  #ssl.certificate_authorities: ["/etc/pki/root/ca.crt"]
+
+  # Certificate for SSL/TLS client authentication
+  #ssl.certificate: "/etc/pki/client/cert.crt"
+
+  # Client certificate key file
+  #ssl.key: "/etc/pki/client/cert.key"

metricbeat/module/mysql/_meta/test.cnf

@@ -1,2 +1,6 @@
 [mysqld]
 bind-address = 0.0.0.0
+require_secure_transport = OFF
+ssl-ca = /etc/certs/root-ca.pem
+ssl-cert = /etc/certs/server-cert.pem
+ssl-key = /etc/certs/server-key.pem

metricbeat/module/mysql/config.go

@@ -0,0 +1,32 @@
+// 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.
+
+package mysql
+
+import (
+	"crypto/tls"
+
+	"github.com/elastic/elastic-agent-libs/transport/tlscommon"
+)
+
+type Config struct {
+	Hosts     []string          `config:"hosts" validate:"required"`
+	Username  string            `config:"username"`
+	Password  string            `config:"password"`
+	TLS       *tlscommon.Config `config:"ssl"`
+	TLSConfig *tls.Config
+}

metricbeat/module/mysql/docker-compose.yml

@@ -2,10 +2,10 @@ version: '2.3'
 
 services:
   mysql:
-    image: docker.elastic.co/integrations-ci/beats-mysql:${MYSQL_VARIANT:-mysql}-${MYSQL_VERSION:-5.7.12}-1
+    image: docker.elastic.co/integrations-ci/beats-mysql:${MYSQL_VARIANT:-mysql}-${MYSQL_VERSION:-8.0}-1
     build:
       context: ./_meta
       args:
-        MYSQL_IMAGE: ${MYSQL_VARIANT:-mysql}:${MYSQL_VERSION:-5.7.12}
+        MYSQL_IMAGE: ${MYSQL_VARIANT:-mysql}:${MYSQL_VERSION:-8.0}
     ports:
       - 3306

metricbeat/module/mysql/galera_status/status.go

@@ -42,23 +42,29 @@ func init() {
 
 // MetricSet for fetching Galera-MySQL server status
 type MetricSet struct {
-	mb.BaseMetricSet
+	*mysql.Metricset
 	db *sql.DB
 }
 
 // New create a new instance of the MetricSet
 // Loads query_mode config setting from the config file
 func New(base mb.BaseMetricSet) (mb.MetricSet, error) {
 	cfgwarn.Experimental("The galera_status metricset is experimental.")
-	return &MetricSet{BaseMetricSet: base}, nil
+
+	ms, err := mysql.NewMetricset(base)
+	if err != nil {
+		return nil, err
+	}
+
+	return &MetricSet{Metricset: ms, db: nil}, nil
 }
 
 // Fetch methods implements the data gathering and data conversion to the right format
 // It returns the event which is then forward to the output.
 func (m *MetricSet) Fetch(reporter mb.ReporterV2) error {
 	if m.db == nil {
 		var err error
-		m.db, err = mysql.NewDB(m.HostData().URI)
+		m.db, err = mysql.NewDB(m.HostData().URI, m.Metricset.Config.TLSConfig)
 		if err != nil {
 			return fmt.Errorf("Galera-status fetch failed: %w", err)
 		}