scaleway · thomas-tacquet · Dec 29, 2025 · Dec 27, 2025
diff --git a/jobs/instances-snapshot/Dockerfile b/jobs/instances-snapshot/Dockerfile
@@ -1,16 +1,27 @@
-# Using apline/golang image
-FROM golang:1.24-alpine
+# Build stage
+FROM golang:1.25-alpine AS builder
 
-# Set destination for COPY
 WORKDIR /app
 
 # Copy required files
-COPY go.mod ./
-COPY go.sum ./
+COPY go.mod go.sum ./
+RUN go mod download
+
 COPY *.go ./
 
 # Build the executable
-RUN go build -o /jobs-snapshot
+RUN CGO_ENABLED=0 GOOS=linux go build -o /jobs-snapshot
+
+# Final stage
+FROM alpine:latest
+
+WORKDIR /app
+
+# Install CA certificates for HTTPS
+RUN apk --no-cache add ca-certificates
+
+# Copy the binary from the builder stage
+COPY --from=builder /jobs-snapshot /app/jobs-snapshot
 
 # Run the executable
-ENTRYPOINT [ "/jobs-snapshot" ]
+ENTRYPOINT [ "/app/jobs-snapshot" ]
diff --git a/jobs/instances-snapshot/go.mod b/jobs/instances-snapshot/go.mod
@@ -1,8 +1,8 @@
 module github.com/scaleway/serverless-examples/jobs/instances-snapshot
 
-go 1.24
+go 1.25
 
-require github.com/scaleway/scaleway-sdk-go v1.0.0-beta.33
+require github.com/scaleway/scaleway-sdk-go v1.0.0-beta.36
 
 require (
 	github.com/kr/pretty v0.3.1 // indirect

diff --git a/jobs/instances-snapshot/go.sum b/jobs/instances-snapshot/go.sum
@@ -1,6 +1,4 @@
 github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
-github.com/dnaeon/go-vcr v1.2.0 h1:zHCHvJYTMh1N7xnV7zf1m1GPBF9Ad0Jk/whtQ1663qI=
-github.com/dnaeon/go-vcr v1.2.0/go.mod h1:R4UdLID7HZT3taECzJs4YgbbH6PIGXB6W/sc5OLb6RQ=
 github.com/kr/pretty v0.2.1/go.mod h1:ipq/a2n7PKx3OHsz4KJII5eveXtPO4qwEXGdVfWzfnI=
 github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
 github.com/kr/pretty v0.3.1/go.mod h1:hoEshYVHaxMs3cyo3Yncou5ZscifuDolrwPKZanG3xk=
@@ -12,10 +10,16 @@ github.com/pkg/diff v0.0.0-20210226163009-20ebb0f2a09e/go.mod h1:pJLUxLENpZxwdsK
 github.com/rogpeppe/go-internal v1.9.0/go.mod h1:WtVeX8xhTBvf0smdhujwtBcq4Qrzq/fJaraNFVN+nFs=
 github.com/rogpeppe/go-internal v1.14.1 h1:UQB4HGPB6osV0SQTLymcB4TgvyWu6ZyliaW0tI/otEQ=
 github.com/rogpeppe/go-internal v1.14.1/go.mod h1:MaRKkUm5W0goXpeCfT7UZI6fk/L7L7so1lCWt35ZSgc=
-github.com/scaleway/scaleway-sdk-go v1.0.0-beta.33 h1:KhF0WejiUTDbL5X55nXowP7zNopwpowa6qaMAWyIE+0=
-github.com/scaleway/scaleway-sdk-go v1.0.0-beta.33/go.mod h1:792k1RTU+5JeMXm35/e2Wgp71qPH/DmDoZrRc+EFZDk=
+github.com/scaleway/scaleway-sdk-go v1.0.0-beta.36 h1:ObX9hZmK+VmijreZO/8x9pQ8/P/ToHD/bdSb4Eg4tUo=
+github.com/scaleway/scaleway-sdk-go v1.0.0-beta.36/go.mod h1:LEsDu4BubxK7/cWhtlQWfuxwL4rf/2UEpxXz1o1EMtM=
+go.yaml.in/yaml/v4 v4.0.0-rc.3 h1:3h1fjsh1CTAPjW7q/EMe+C8shx5d8ctzZTrLcs/j8Go=
+go.yaml.in/yaml/v4 v4.0.0-rc.3/go.mod h1:aZqd9kCMsGL7AuUv/m/PvWLdg5sjJsZ4oHDEnfPPfY0=
+golang.org/x/text v0.32.0 h1:ZD01bjUt1FQ9WJ0ClOL5vxgxOI/sVCNgX1YtKwcY0mU=
+golang.org/x/text v0.32.0/go.mod h1:o/rUWzghvpD5TXrTIBuJU77MTaN0ljMWE47kxGJQ7jY=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
+gopkg.in/dnaeon/go-vcr.v4 v4.0.6 h1:PiJkrakkmzc5s7EfBnZOnyiLwi7o7A9fwPzN0X2uwe0=
+gopkg.in/dnaeon/go-vcr.v4 v4.0.6/go.mod h1:sbq5oMEcM4PXngbcNbHhzfCP9OdZodLhrbRYoyg09HY=
 gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
 gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
diff --git a/jobs/instances-snapshot/main.go b/jobs/instances-snapshot/main.go
@@ -1,7 +1,9 @@
 package main
 
 import (
+	"context"
 	"fmt"
+	"log/slog"
 	"os"
 
 	"github.com/scaleway/scaleway-sdk-go/api/block/v1"
@@ -19,7 +21,21 @@ const (
 )
 
 func main() {
-	fmt.Println("creating snapshot of instance...")
+	logger := slog.New(slog.NewTextHandler(os.Stdout, nil))
+	slog.SetDefault(logger)
+
+	if err := run(); err != nil {
+		slog.Error("application failed", "error", err)
+		os.Exit(1)
+	}
+}
+
+func run() error {
+	if err := checkEnvVars(); err != nil {
+		return err
+	}
+
+	slog.Info("creating snapshot of instance...")
 
 	// Create a Scaleway client with credentials from environment variables.
 	client, err := scw.NewClient(
@@ -32,52 +48,62 @@ func main() {
 		// Get more about our availability
 		// zones at https://www.scaleway.com/en/docs/console/my-account/reference-content/products-availability/
 		scw.WithDefaultRegion(scw.RegionFrPar),
+
+		scw.WithDefaultZone(scw.Zone(os.Getenv(envInstanceZone))),
 	)
 	if err != nil {
-		panic(err)
+		return fmt.Errorf("failed to create client: %w", err)
 	}
 
 	// Create SDK objects for Scaleway Instance product
 	instanceAPI := instance.NewAPI(client)
-
 	blockAPI := block.NewAPI(client)
 
-	if err := createSnapshots(instanceAPI, blockAPI); err != nil {
-		panic(err)
+	ctx := context.Background()
+
+	if err := createSnapshots(ctx, instanceAPI, blockAPI); err != nil {
+		return err
 	}
+
+	return nil
 }
 
-func createSnapshots(instanceAPI *instance.API, blockAPI *block.API) error {
+func createSnapshots(ctx context.Context, instanceAPI *instance.API, blockAPI *block.API) error {
+	zone := scw.Zone(os.Getenv(envInstanceZone))
+	instanceID := os.Getenv(envInstanceID)
+
 	gotInstance, err := instanceAPI.GetServer(&instance.GetServerRequest{
-		ServerID: os.Getenv(envInstanceID),
-		Zone:     scw.Zone(os.Getenv(envInstanceZone)),
-	})
+		ServerID: instanceID,
+		Zone:     zone,
+	}, scw.WithContext(ctx))
 	if err != nil {
-		return fmt.Errorf("error while getting instance %w", err)
+		return fmt.Errorf("error while getting instance: %w", err)
 	}
 
 	for _, volume := range gotInstance.Server.Volumes {
+		slog.Info("creating snapshot for volume", "volume_id", volume.ID)
 		snapshotResp, err := blockAPI.CreateSnapshot(&block.CreateSnapshotRequest{
-			Zone:      scw.Zone(os.Getenv(envInstanceZone)),
+			Zone:      zone,
 			VolumeID:  volume.ID,
 			ProjectID: os.Getenv(envProjectID),
-		})
+		}, scw.WithContext(ctx))
 		if err != nil {
-			return fmt.Errorf("error while creating snapshot %w", err)
+			return fmt.Errorf("error while creating snapshot: %w", err)
 		}
 
-		fmt.Println("created snapshot ", snapshotResp.ID)
+		slog.Info("created snapshot", "snapshot_id", snapshotResp.ID)
 	}
 
 	return nil
 }
 
-func init() {
-	mandatoryVariables := [...]string{envOrgID, envAccessKey, envSecretKey, envInstanceID, envInstanceZone}
+func checkEnvVars() error {
+	mandatoryVariables := []string{envOrgID, envAccessKey, envSecretKey, envInstanceID, envInstanceZone, envProjectID}
 
-	for idx := range mandatoryVariables {
-		if os.Getenv(mandatoryVariables[idx]) == "" {
-			panic("missing environment variable " + mandatoryVariables[idx])
+	for _, v := range mandatoryVariables {
+		if os.Getenv(v) == "" {
+			return fmt.Errorf("missing environment variable: %s", v)
 		}
 	}
+	return nil
 }