log: use log.Print instead of fmt.Print

coreos-cloudinit.go

@@ -17,6 +17,7 @@ package main
 import (
 	"flag"
 	"fmt"
+	"log"
 	"os"
 	"sync"
 	"time"
@@ -160,37 +161,37 @@ func main() {
 
 	ds := selectDatasource(dss)
 	if ds == nil {
-		fmt.Println("No datasources available in time")
+		log.Println("No datasources available in time")
 		os.Exit(1)
 	}
 
-	fmt.Printf("Fetching user-data from datasource of type %q\n", ds.Type())
+	log.Printf("Fetching user-data from datasource of type %q\n", ds.Type())
 	userdataBytes, err := ds.FetchUserdata()
 	if err != nil {
-		fmt.Printf("Failed fetching user-data from datasource: %v\nContinuing...\n", err)
+		log.Printf("Failed fetching user-data from datasource: %v. Continuing...\n", err)
 		failure = true
 	}
 
 	if report, err := validate.Validate(userdataBytes); err == nil {
 		ret := 0
 		for _, e := range report.Entries() {
-			fmt.Println(e)
+			log.Println(e)
 			ret = 1
 		}
 		if flags.validate {
 			os.Exit(ret)
 		}
 	} else {
-		fmt.Printf("Failed while validating user_data (%q)\n", err)
+		log.Printf("Failed while validating user_data (%q)\n", err)
 		if flags.validate {
 			os.Exit(1)
 		}
 	}
 
-	fmt.Printf("Fetching meta-data from datasource of type %q\n", ds.Type())
+	log.Printf("Fetching meta-data from datasource of type %q\n", ds.Type())
 	metadata, err := ds.FetchMetadata()
 	if err != nil {
-		fmt.Printf("Failed fetching meta-data from datasource: %v\n", err)
+		log.Printf("Failed fetching meta-data from datasource: %v\n", err)
 		os.Exit(1)
 	}
 
@@ -216,7 +217,7 @@ func main() {
 		failure = true
 	}
 
-	fmt.Println("Merging cloud-config from meta-data and user-data")
+	log.Println("Merging cloud-config from meta-data and user-data")
 	cc := mergeConfigs(ccu, metadata)
 
 	var ifaces []network.InterfaceGenerator
@@ -233,19 +234,19 @@ func main() {
 			err = fmt.Errorf("Unsupported network config format %q", flags.convertNetconf)
 		}
 		if err != nil {
-			fmt.Printf("Failed to generate interfaces: %v\n", err)
+			log.Printf("Failed to generate interfaces: %v\n", err)
 			os.Exit(1)
 		}
 	}
 
 	if err = initialize.Apply(cc, ifaces, env); err != nil {
-		fmt.Printf("Failed to apply cloud-config: %v\n", err)
+		log.Printf("Failed to apply cloud-config: %v\n", err)
 		os.Exit(1)
 	}
 
 	if script != nil {
 		if err = runScript(*script, env); err != nil {
-			fmt.Printf("Failed to run script: %v\n", err)
+			log.Printf("Failed to run script: %v\n", err)
 			os.Exit(1)
 		}
 	}
@@ -265,7 +266,7 @@ func mergeConfigs(cc *config.CloudConfig, md datasource.Metadata) (out config.Cl
 
 	if md.Hostname != "" {
 		if out.Hostname != "" {
-			fmt.Printf("Warning: user-data hostname (%s) overrides metadata hostname (%s)\n", out.Hostname, md.Hostname)
+			log.Printf("Warning: user-data hostname (%s) overrides metadata hostname (%s)\n", out.Hostname, md.Hostname)
 		} else {
 			out.Hostname = md.Hostname
 		}
@@ -330,7 +331,7 @@ func selectDatasource(sources []datasource.Datasource) datasource.Datasource {
 
 			duration := datasourceInterval
 			for {
-				fmt.Printf("Checking availability of %q\n", s.Type())
+				log.Printf("Checking availability of %q\n", s.Type())
 				if s.IsAvailable() {
 					ds <- s
 					return
@@ -368,7 +369,7 @@ func selectDatasource(sources []datasource.Datasource) datasource.Datasource {
 func runScript(script config.Script, env *initialize.Environment) error {
 	err := initialize.PrepWorkspace(env.Workspace())
 	if err != nil {
-		fmt.Printf("Failed preparing workspace: %v\n", err)
+		log.Printf("Failed preparing workspace: %v\n", err)
 		return err
 	}
 	path, err := initialize.PersistScriptInWorkspace(script, env.Workspace())

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

system/networkd.go

@@ -15,7 +15,6 @@
 package system
 
 import (
-	"fmt"
 	"log"
 	"net"
 	"os/exec"
@@ -59,7 +58,7 @@ func downNetworkInterfaces(interfaces []network.InterfaceGenerator) error {
 		if systemInterface, ok := sysInterfaceMap[iface.Name()]; ok {
 			log.Printf("Taking down interface %q\n", systemInterface.Name)
 			if err := netlink.NetworkLinkDown(systemInterface); err != nil {
-				fmt.Printf("Error while downing interface %q (%s). Continuing...\n", systemInterface.Name, err)
+				log.Printf("Error while downing interface %q (%s). Continuing...\n", systemInterface.Name, err)
 			}
 		}
 	}