Fix manager logger initialization (#4585)

- Apply config before setting up logger to configure it properly
- Fixes #4584

Author: smanojj

.chloggen/fix-manager-logger-initialization.yaml

@@ -0,0 +1,17 @@
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: bug_fix
+
+# The name of the component, or a single word describing the area of concern, (e.g. collector, target allocator, auto-instrumentation, opamp, github action)
+component: config
+
+# A brief description of the change. Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: Fix manager logger initialization
+
+# One or more tracking issues related to the change
+issues: [4584]
+
+# (Optional) One or more lines of additional information to render under the primary note.
+# These lines will be padded with 2 spaces and then inserted directly into the document.
+# Use pipe (|) for multiline entries.
+subtext: |
+  Apply config before setting up logger to configure it properly.

main.go

@@ -98,6 +98,12 @@ func main() {
 		panic(err)
 	}
 
+	err := cfg.Apply(configFile)
+	if err != nil {
+		fmt.Printf("configuration error: %v\n", err)
+		os.Exit(1)
+	}
+
 	opts.EncoderConfigOptions = append(opts.EncoderConfigOptions, func(ec *zapcore.EncoderConfig) {
 		ec.MessageKey = cfg.Zap.MessageKey
 		ec.LevelKey = cfg.Zap.LevelKey
@@ -114,12 +120,6 @@ func main() {
 
 	configLog := ctrl.Log.WithName("config")
 
-	err := cfg.Apply(configFile)
-	if err != nil {
-		configLog.Error(err, "configuration error")
-		os.Exit(1)
-	}
-
 	v := version.Get()
 
 	logger.Info("Starting the OpenTelemetry Operator",