add integration test with tls

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 @@
+-----BEGIN CERTIFICATE-----
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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

@@ -0,0 +1,21 @@
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----

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

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

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

@@ -0,0 +1,16 @@
+-----BEGIN CERTIFICATE REQUEST-----
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+DONrBzhMQ4R36X+Q6q65qJ0rmvwZcUfkIauQzdNv9ZfCDT7pO1VtNT0R+H6+shz9
+JiwGOudAlFSt31Ps0+lDm6WjA6J1Nmr9N7XrsmfdW4z2n1UZSPS9mOZIj+PpUtQw
+OzIwJ/+btS/RVO0cGGFkoFwhrYKilAbq+SsMxMVxPcXUP+xLFYn6FCNFbf5uBpLz
+ZM7HBDh2uVfwsaptnY3v+EIELCsXsFm9uj4zG45fJmu4KARY6FAi9sEvfA1ieZuU
+8hmovXhKq6eSU2fPoeurRV1gxuanuFObd39LRoCTy3fCnqTZFxXg
+-----END CERTIFICATE REQUEST-----

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/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/mysql_integration_test.go

@@ -15,11 +15,12 @@
 // specific language governing permissions and limitations
 // under the License.
 
-//go:build integration
-
 package mysql
 
 import (
+	"crypto/tls"
+	"crypto/x509"
+	"os"
 	"testing"
 
 	"github.com/stretchr/testify/assert"
@@ -37,3 +38,51 @@ func TestNewDB(t *testing.T) {
 	err = db.Ping()
 	assert.NoError(t, err)
 }
+
+func loadTLSConfig(caCertPath, clientCertPath, clientKeyPath string) (*tls.Config, error) {
+	caCert, err := os.ReadFile(caCertPath)
+	if err != nil {
+		return nil, err
+	}
+	caCertPool := x509.NewCertPool()
+	caCertPool.AppendCertsFromPEM(caCert)
+
+	cert, err := tls.LoadX509KeyPair(clientCertPath, clientKeyPath)
+	if err != nil {
+		return nil, err
+	}
+
+	tlsConfig := &tls.Config{
+		Certificates: []tls.Certificate{cert},
+		RootCAs:      caCertPool,
+	}
+
+	return tlsConfig, nil
+}
+
+func TestNewDBWithSSL(t *testing.T) {
+	service := compose.EnsureUp(t, "mysql")
+
+	tlsConfig, err := loadTLSConfig("_meta/certs/root-ca.pem", "_meta/certs/client-cert.pem", "_meta/certs/client-key.pem")
+	tlsConfig.InsecureSkipVerify = true
+	assert.NoError(t, err)
+
+	db, err := NewDB(GetMySQLEnvDSN(service.Host())+"?tls=custom", tlsConfig)
+	assert.NoError(t, err)
+
+	err = db.Ping()
+	assert.NoError(t, err)
+
+	// Check if the current connection is using SSL
+	var sslCipher, variableName, value string
+	err = db.QueryRow(`show status like 'Ssl_cipher'`).Scan(&variableName, &sslCipher)
+	assert.NoError(t, err)
+
+	// If sslCipher is not empty, then SSL is being used for the connection
+	assert.NotEmpty(t, variableName)
+	assert.NotEmpty(t, sslCipher)
+
+	err = db.QueryRow(`show variables like 'have_ssl'`).Scan(&variableName, &value)
+	assert.NoError(t, err)
+	assert.Equal(t, "YES", value)
+}