log: use log.Print instead of fmt.Print

datasource/configdrive/configdrive.go

@@ -16,8 +16,8 @@ package configdrive
 
 import (
 	"encoding/json"
-	"fmt"
 	"io/ioutil"
+	"log"
 	"os"
 	"path"
 
@@ -93,7 +93,7 @@ func (cd *configDrive) openstackVersionRoot() string {
 }
 
 func (cd *configDrive) tryReadFile(filename string) ([]byte, error) {
-	fmt.Printf("Attempting to read from %q\n", filename)
+	log.Printf("Attempting to read from %q\n", filename)
 	data, err := cd.readFile(filename)
 	if os.IsNotExist(err) {
 		err = nil

datasource/metadata/ec2/metadata.go

@@ -18,6 +18,7 @@ import (
 	"bufio"
 	"bytes"
 	"fmt"
+	"log"
 	"net"
 	"strings"
 
@@ -61,7 +62,7 @@ func (ms metadataService) FetchMetadata() (datasource.Metadata, error) {
 				return metadata, err
 			}
 			metadata.SSHPublicKeys[name] = sshkey
-			fmt.Printf("Found SSH key for %q\n", name)
+			log.Printf("Found SSH key for %q\n", name)
 		}
 	} else if _, ok := err.(pkg.ErrNotFound); !ok {
 		return metadata, err

datasource/waagent/waagent.go

@@ -16,8 +16,8 @@ package waagent
 
 import (
 	"encoding/xml"
-	"fmt"
 	"io/ioutil"
+	"log"
 	"net"
 	"os"
 	"path"
@@ -108,7 +108,7 @@ func (a *waagent) Type() string {
 }
 
 func (a *waagent) tryReadFile(filename string) ([]byte, error) {
-	fmt.Printf("Attempting to read from %q\n", filename)
+	log.Printf("Attempting to read from %q\n", filename)
 	data, err := a.readFile(filename)
 	if os.IsNotExist(err) {
 		err = nil