Always pull images by default

The behaviour prior to this patch caused some confusion for users since they expected a behaviour like Swarm / Kubernetes which always pulls images by default, even if cached. I've tested the change and it is working as expected. By default images are always pulled upon deployment. To revert to the prior behaviour, simply add to faasd up: --pull-policy=IfNotPresent Signed-off-by: Alex Ellis (OpenFaaS Ltd) <alexellis2@gmail.com>
2025-06-18 12:06:36 +00:00 · 2020-03-01 20:02:52 +00:00
parent a0110b3019
commit be8574ecd0
7 changed files with 141 additions and 99 deletions
--- a/cmd/provider.go
+++ b/cmd/provider.go
@ -19,82 +19,96 @@ import (
 	"github.com/spf13/cobra"
 )

-var providerCmd = &cobra.Command{
-	Use:   "provider",
-	Short: "Run the faasd-provider",
-	RunE:  runProvider,
-}
-
-func runProvider(_ *cobra.Command, _ []string) error {
-
-	config, providerConfig, err := config.ReadFromEnv(types.OsEnv{})
-	if err != nil {
-		return err
+func makeProviderCmd() *cobra.Command {
+	var command = &cobra.Command{
+		Use:   "provider",
+		Short: "Run the faasd-provider",
 	}

-	log.Printf("faasd-provider starting..\tService Timeout: %s\n", config.WriteTimeout.String())
+	command.Flags().String("pull-policy", "Always", `Set to "Always" to force a pull of images upon deployment, or "IfNotPresent" to try to use a cached image.`)

-	wd, err := os.Getwd()
-	if err != nil {
-		return err
+	command.RunE = func(_ *cobra.Command, _ []string) error {
+
+		pullPolicy, flagErr := command.Flags().GetString("pull-policy")
+		if flagErr != nil {
+			return flagErr
+		}
+
+		alwaysPull := false
+		if pullPolicy == "Always" {
+			alwaysPull = true
+		}
+
+		config, providerConfig, err := config.ReadFromEnv(types.OsEnv{})
+		if err != nil {
+			return err
+		}
+
+		log.Printf("faasd-provider starting..\tService Timeout: %s\n", config.WriteTimeout.String())
+
+		wd, err := os.Getwd()
+		if err != nil {
+			return err
+		}
+
+		writeHostsErr := ioutil.WriteFile(path.Join(wd, "hosts"),
+			[]byte(`127.0.0.1	localhost`), workingDirectoryPermission)
+
+		if writeHostsErr != nil {
+			return fmt.Errorf("cannot write hosts file: %s", writeHostsErr)
+		}
+
+		writeResolvErr := ioutil.WriteFile(path.Join(wd, "resolv.conf"),
+			[]byte(`nameserver 8.8.8.8`), workingDirectoryPermission)
+
+		if writeResolvErr != nil {
+			return fmt.Errorf("cannot write resolv.conf file: %s", writeResolvErr)
+		}
+
+		cni, err := cninetwork.InitNetwork()
+		if err != nil {
+			return err
+		}
+
+		client, err := containerd.New(providerConfig.Sock)
+		if err != nil {
+			return err
+		}
+
+		defer client.Close()
+
+		invokeResolver := handlers.NewInvokeResolver(client)
+
+		userSecretPath := path.Join(wd, "secrets")
+
+		bootstrapHandlers := types.FaaSHandlers{
+			FunctionProxy:        proxy.NewHandlerFunc(*config, invokeResolver),
+			DeleteHandler:        handlers.MakeDeleteHandler(client, cni),
+			DeployHandler:        handlers.MakeDeployHandler(client, cni, userSecretPath, alwaysPull),
+			FunctionReader:       handlers.MakeReadHandler(client),
+			ReplicaReader:        handlers.MakeReplicaReaderHandler(client),
+			ReplicaUpdater:       handlers.MakeReplicaUpdateHandler(client, cni),
+			UpdateHandler:        handlers.MakeUpdateHandler(client, cni, userSecretPath, alwaysPull),
+			HealthHandler:        func(w http.ResponseWriter, r *http.Request) {},
+			InfoHandler:          handlers.MakeInfoHandler(Version, GitCommit),
+			ListNamespaceHandler: listNamespaces(),
+			SecretHandler:        handlers.MakeSecretHandler(client, userSecretPath),
+			LogHandler: func(w http.ResponseWriter, r *http.Request) {
+				if r.Body != nil {
+					defer r.Body.Close()
+				}
+
+				w.WriteHeader(http.StatusNotImplemented)
+				w.Write([]byte(`Logs are not implemented for faasd`))
+			},
+		}
+
+		log.Printf("Listening on TCP port: %d\n", *config.TCPPort)
+		bootstrap.Serve(&bootstrapHandlers, config)
+		return nil
 	}

-	writeHostsErr := ioutil.WriteFile(path.Join(wd, "hosts"),
-		[]byte(`127.0.0.1	localhost`), workingDirectoryPermission)
-
-	if writeHostsErr != nil {
-		return fmt.Errorf("cannot write hosts file: %s", writeHostsErr)
-	}
-
-	writeResolvErr := ioutil.WriteFile(path.Join(wd, "resolv.conf"),
-		[]byte(`nameserver 8.8.8.8`), workingDirectoryPermission)
-
-	if writeResolvErr != nil {
-		return fmt.Errorf("cannot write resolv.conf file: %s", writeResolvErr)
-	}
-
-	cni, err := cninetwork.InitNetwork()
-	if err != nil {
-		return err
-	}
-
-	client, err := containerd.New(providerConfig.Sock)
-	if err != nil {
-		return err
-	}
-
-	defer client.Close()
-
-	invokeResolver := handlers.NewInvokeResolver(client)
-
-	userSecretPath := path.Join(wd, "secrets")
-
-	bootstrapHandlers := types.FaaSHandlers{
-		FunctionProxy:        proxy.NewHandlerFunc(*config, invokeResolver),
-		DeleteHandler:        handlers.MakeDeleteHandler(client, cni),
-		DeployHandler:        handlers.MakeDeployHandler(client, cni, userSecretPath),
-		FunctionReader:       handlers.MakeReadHandler(client),
-		ReplicaReader:        handlers.MakeReplicaReaderHandler(client),
-		ReplicaUpdater:       handlers.MakeReplicaUpdateHandler(client, cni),
-		UpdateHandler:        handlers.MakeUpdateHandler(client, cni, userSecretPath),
-		HealthHandler:        func(w http.ResponseWriter, r *http.Request) {},
-		InfoHandler:          handlers.MakeInfoHandler(Version, GitCommit),
-		ListNamespaceHandler: listNamespaces(),
-		SecretHandler:        handlers.MakeSecretHandler(client, userSecretPath),
-		LogHandler: func(w http.ResponseWriter, r *http.Request) {
-			if r.Body != nil {
-				defer r.Body.Close()
-			}
-
-			w.WriteHeader(http.StatusNotImplemented)
-			w.Write([]byte(`Logs are not implemented for faasd`))
-		},
-	}
-
-	log.Printf("Listening on TCP port: %d\n", *config.TCPPort)
-	bootstrap.Serve(&bootstrapHandlers, config)
-
-	return nil
+	return command
 }

 func listNamespaces() func(w http.ResponseWriter, r *http.Request) {