fix(api): fix snapshot hanging

api/cron/job_snapshot.go

@@ -45,6 +45,7 @@ func (runner *SnapshotJobRunner) GetSchedule() *portainer.Schedule {
 // As a snapshot can be a long process, to avoid any concurrency issue we
 // retrieve the latest version of the endpoint right after a snapshot.
 func (runner *SnapshotJobRunner) Run() {
+	go func() {
 		endpoints, err := runner.context.endpointService.Endpoints()
 		if err != nil {
 			log.Printf("background schedule error (endpoint snapshot). Unable to retrieve endpoint list (err=%s)\n", err)
@@ -80,4 +81,5 @@ func (runner *SnapshotJobRunner) Run() {
 				return
 			}
 		}
+	}()
 }

api/docker/client.go

@@ -3,6 +3,7 @@ package docker
 import (
 	"net/http"
 	"strings"
+	"time"
 
 	"github.com/docker/docker/client"
 	"github.com/portainer/portainer"
@@ -102,5 +103,6 @@ func httpClient(endpoint *portainer.Endpoint) (*http.Client, error) {
 
 	return &http.Client{
 		Transport: transport,
+		Timeout:   30 * time.Second,
 	}, nil
 }