Canary deployments for fission functions. (#892)

controller/controller.go

@@ -17,17 +17,19 @@ limitations under the License.
 package controller
 
 import (
+	"context"
 	"log"
 
 	"github.com/fission/fission"
+	"github.com/fission/fission/canaryconfigmgr"
 	"github.com/fission/fission/crd"
 )
 
-func Start(port int) {
+func Start(port int, prometheusSvc string) {
 	// setup a signal handler for SIGTERM
 	fission.SetupStackTraceHandler()
 
-	fc, _, apiExtClient, err := crd.MakeFissionClient()
+	fc, kc, apiExtClient, err := crd.MakeFissionClient()
 	if err != nil {
 		log.Fatalf("Failed to connect to K8s API: %v", err)
 	}
@@ -42,6 +44,15 @@ func Start(port int) {
 		log.Fatalf("Error waiting for CRDs: %v", err)
 	}
 
+	// create canary config manager
+	canaryCfgMgr, err := canaryconfigmgr.MakeCanaryConfigMgr(fc, kc, fc.GetCrdClient(), prometheusSvc)
+	if err != nil {
+		log.Fatalf("Failed to start canary config manager: %v", err)
+	}
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+	canaryCfgMgr.Run(ctx)
+
 	api, err := MakeAPI()
 	if err != nil {
 		log.Fatalf("Failed to start controller: %v", err)