2 files changed, 25 insertions, 7 deletions
diff --git a/tools/nixery/server/config/config.go b/tools/nixery/server/config/config.go
index abc067855a88..9447975aa9a2 100644
--- a/tools/nixery/server/config/config.go
+++ b/tools/nixery/server/config/config.go
@@ -32,14 +32,20 @@ func signingOptsFromEnv() *storage.SignedURLOptions {
 	id := os.Getenv("GCS_SIGNING_ACCOUNT")
 
 	if path == "" || id == "" {
-		log.Println("GCS URL signing disabled")
+		log.Info("GCS URL signing disabled")
 		return nil
 	}
 
-	log.Printf("GCS URL signing enabled with account %q\n", id)
+	log.WithFields(log.Fields{
+		"account": id,
+	}).Info("GCS URL signing enabled")
+
 	k, err := ioutil.ReadFile(path)
 	if err != nil {
-		log.Fatalf("Failed to read GCS signing key: %s\n", err)
+		log.WithFields(log.Fields{
+			"file":  path,
+			"error": err,
+		}).Fatal("failed to read GCS signing key")
 	}
 
 	return &storage.SignedURLOptions{
@@ -52,7 +58,10 @@ func signingOptsFromEnv() *storage.SignedURLOptions {
 func getConfig(key, desc, def string) string {
 	value := os.Getenv(key)
 	if value == "" && def == "" {
-		log.Fatalln(desc + " must be specified")
+		log.WithFields(log.Fields{
+			"option":      key,
+			"description": desc,
+		}).Fatal("missing required configuration envvar")
 	} else if value == "" {
 		return def
 	}
diff --git a/tools/nixery/server/config/pkgsource.go b/tools/nixery/server/config/pkgsource.go
index 98719ecceabb..3a817f3d76d3 100644
--- a/tools/nixery/server/config/pkgsource.go
+++ b/tools/nixery/server/config/pkgsource.go
@@ -132,21 +132,30 @@ func (p *PkgsPath) CacheKey(pkgs []string, tag string) string {
 // specified, the Nix code will default to a recent NixOS channel.
 func pkgSourceFromEnv() (PkgSource, error) {
 	if channel := os.Getenv("NIXERY_CHANNEL"); channel != "" {
-		log.Printf("Using Nix package set from Nix channel %q\n", channel)
+		log.WithFields(log.Fields{
+			"channel": channel,
+		}).Info("using Nix package set from Nix channel or commit")
+
 		return &NixChannel{
 			channel: channel,
 		}, nil
 	}
 
 	if git := os.Getenv("NIXERY_PKGS_REPO"); git != "" {
-		log.Printf("Using Nix package set from git repository at %q\n", git)
+		log.WithFields(log.Fields{
+			"repo": git,
+		}).Info("using NIx package set from git repository")
+
 		return &GitSource{
 			repository: git,
 		}, nil
 	}
 
 	if path := os.Getenv("NIXERY_PKGS_PATH"); path != "" {
-		log.Printf("Using Nix package set from path %q\n", path)
+		log.WithFields(log.Fields{
+			"path": path,
+		}).Info("using Nix package set at local path")
+
 		return &PkgsPath{
 			path: path,
 		}, nil