feat(alerting): make it possible to skip ssl verification for alerting https requests

conf/defaults.ini

@@ -387,6 +387,9 @@ global_session = -1
 [alerting]
 enabled = true
 
+# Skip ssl validation for queries sent to the timeserie database.
+skip_ssl_validation = false
+
 #################################### Internal Grafana Metrics ##########################
 # Metrics available at HTTP API Url /api/metrics
 [metrics]

conf/sample.ini

@@ -333,6 +333,9 @@ check_for_updates = true
 [alerting]
 ;enabled = false
 
+# Skip ssl validation for queries sent to the timeserie database.
+;skip_ssl_validation = false
+
 #################################### Internal Grafana Metrics ##########################
 # Metrics available at HTTP API Url /api/metrics
 [metrics]

pkg/setting/setting.go

@@ -141,7 +141,8 @@ var (
 	Quota QuotaSettings
 
 	// Alerting
-	AlertingEnabled bool
+	AlertingEnabled           bool
+	AlertingSkipSSLValidation bool
 
 	// logger
 	logger log.Logger
@@ -546,6 +547,7 @@ func NewConfigContext(args *CommandLineArgs) error {
 
 	alerting := Cfg.Section("alerting")
 	AlertingEnabled = alerting.Key("enabled").MustBool(false)
+	AlertingSkipSSLValidation = alerting.Key("skip_ssl_validation").MustBool(false)
 
 	readSessionConfig()
 	readSmtpSettings()

pkg/tsdb/graphite/graphite.go

@@ -1,6 +1,7 @@
 package graphite
 
 import (
+	"crypto/tls"
 	"encoding/json"
 	"fmt"
 	"io/ioutil"
@@ -15,10 +16,6 @@ import (
 	"github.com/grafana/grafana/pkg/tsdb"
 )
 
-var (
-	HttpClient = http.Client{Timeout: time.Duration(10 * time.Second)}
-)
-
 type GraphiteExecutor struct {
 	*tsdb.DataSourceInfo
 }
@@ -27,11 +24,23 @@ func NewGraphiteExecutor(dsInfo *tsdb.DataSourceInfo) tsdb.Executor {
 	return &GraphiteExecutor{dsInfo}
 }
 
-var glog log.Logger
+var (
+	glog       log.Logger
+	HttpClient http.Client
+)
 
 func init() {
 	glog = log.New("tsdb.graphite")
 	tsdb.RegisterExecutor("graphite", NewGraphiteExecutor)
+
+	tr := &http.Transport{
+		TLSClientConfig: &tls.Config{InsecureSkipVerify: setting.AlertingSkipSSLValidation},
+	}
+
+	HttpClient = http.Client{
+		Timeout:   time.Duration(10 * time.Second),
+		Transport: tr,
+	}
 }
 
 func (e *GraphiteExecutor) Execute(queries tsdb.QuerySlice, context *tsdb.QueryContext) *tsdb.BatchResult {