forked from caddyserver/caddy
/
run.go
290 lines (256 loc) · 8.34 KB
/
run.go
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package caddymain
import (
"errors"
"flag"
"fmt"
"io/ioutil"
"log"
"os"
"path/filepath"
"runtime"
"strconv"
"strings"
"gopkg.in/natefinch/lumberjack.v2"
"github.com/xenolf/lego/acme"
"github.com/mholt/caddy"
// plug in the HTTP server type
_ "github.com/mholt/caddy/caddyhttp"
"github.com/mholt/caddy/caddytls"
// This is where other plugins get plugged in (imported)
)
func init() {
caddy.TrapSignals()
setVersion()
flag.BoolVar(&caddytls.Agreed, "agree", false, "Agree to the CA's Subscriber Agreement")
flag.StringVar(&caddytls.DefaultCAUrl, "ca", "https://acme-v01.api.letsencrypt.org/directory", "URL to certificate authority's ACME server directory")
flag.StringVar(&conf, "conf", "", "Caddyfile to load (default \""+caddy.DefaultConfigFile+"\")")
flag.StringVar(&cpu, "cpu", "100%", "CPU cap")
flag.BoolVar(&plugins, "plugins", false, "List installed plugins")
flag.StringVar(&caddytls.DefaultEmail, "email", "", "Default ACME CA account email address")
flag.DurationVar(&acme.HTTPClient.Timeout, "catimeout", acme.HTTPClient.Timeout, "Default ACME CA HTTP timeout")
flag.StringVar(&logfile, "log", "", "Process log file")
flag.StringVar(&caddy.PidFile, "pidfile", "", "Path to write pid file")
flag.BoolVar(&caddy.Quiet, "quiet", false, "Quiet mode (no initialization output)")
flag.StringVar(&revoke, "revoke", "", "Hostname for which to revoke the certificate")
flag.StringVar(&serverType, "type", "http", "Type of server to run")
flag.BoolVar(&version, "version", false, "Show version")
caddy.RegisterCaddyfileLoader("flag", caddy.LoaderFunc(confLoader))
caddy.SetDefaultCaddyfileLoader("default", caddy.LoaderFunc(defaultLoader))
}
// Run is Caddy's main() function.
func Run() {
flag.Parse()
caddy.AppName = appName
caddy.AppVersion = appVersion
acme.UserAgent = appName + "/" + appVersion
// Set up process log before anything bad happens
switch logfile {
case "stdout":
log.SetOutput(os.Stdout)
case "stderr":
log.SetOutput(os.Stderr)
case "":
log.SetOutput(ioutil.Discard)
default:
log.SetOutput(&lumberjack.Logger{
Filename: logfile,
MaxSize: 100,
MaxAge: 14,
MaxBackups: 10,
})
}
// Check for one-time actions
if revoke != "" {
err := caddytls.Revoke(revoke)
if err != nil {
log.Fatal(err)
}
fmt.Printf("Revoked certificate for %s\n", revoke)
os.Exit(0)
}
if version {
fmt.Printf("%s %s\n", appName, appVersion)
if devBuild && gitShortStat != "" {
fmt.Printf("%s\n%s\n", gitShortStat, gitFilesModified)
}
os.Exit(0)
}
if plugins {
fmt.Println(caddy.DescribePlugins())
os.Exit(0)
}
moveStorage() // TODO: This is temporary for the 0.9 release, or until most users upgrade to 0.9+
// Set CPU cap
err := setCPU(cpu)
if err != nil {
mustLogFatal(err)
}
// Get Caddyfile input
caddyfile, err := caddy.LoadCaddyfile(serverType)
if err != nil {
mustLogFatal(err)
}
// Start your engines
instance, err := caddy.Start(caddyfile)
if err != nil {
mustLogFatal(err)
}
// Twiddle your thumbs
instance.Wait()
}
// mustLogFatal wraps log.Fatal() in a way that ensures the
// output is always printed to stderr so the user can see it
// if the user is still there, even if the process log was not
// enabled. If this process is an upgrade, however, and the user
// might not be there anymore, this just logs to the process
// log and exits.
func mustLogFatal(args ...interface{}) {
if !caddy.IsUpgrade() {
log.SetOutput(os.Stderr)
}
log.Fatal(args...)
}
// confLoader loads the Caddyfile using the -conf flag.
func confLoader(serverType string) (caddy.Input, error) {
if conf == "" {
return nil, nil
}
if conf == "stdin" {
return caddy.CaddyfileFromPipe(os.Stdin, serverType)
}
contents, err := ioutil.ReadFile(conf)
if err != nil {
return nil, err
}
return caddy.CaddyfileInput{
Contents: contents,
Filepath: conf,
ServerTypeName: serverType,
}, nil
}
// defaultLoader loads the Caddyfile from the current working directory.
func defaultLoader(serverType string) (caddy.Input, error) {
contents, err := ioutil.ReadFile(caddy.DefaultConfigFile)
if err != nil {
if os.IsNotExist(err) {
return nil, nil
}
return nil, err
}
return caddy.CaddyfileInput{
Contents: contents,
Filepath: caddy.DefaultConfigFile,
ServerTypeName: serverType,
}, nil
}
// moveStorage moves the old certificate storage location by
// renaming the "letsencrypt" folder to the hostname of the
// CA URL. This is TEMPORARY until most users have upgraded to 0.9+.
func moveStorage() {
oldPath := filepath.Join(caddy.AssetsPath(), "letsencrypt")
_, err := os.Stat(oldPath)
if os.IsNotExist(err) {
return
}
// Just use a default config to get default (file) storage
fileStorage, err := new(caddytls.Config).StorageFor(caddytls.DefaultCAUrl)
if err != nil {
log.Fatalf("[ERROR] Unable to get new path for certificate storage: %v", err)
}
newPath := fileStorage.(*caddytls.FileStorage).Path
err = os.MkdirAll(string(newPath), 0700)
if err != nil {
log.Fatalf("[ERROR] Unable to make new certificate storage path: %v\n\nPlease follow instructions at:\nhttps://github.com/mholt/caddy/issues/902#issuecomment-228876011", err)
}
err = os.Rename(oldPath, string(newPath))
if err != nil {
log.Fatalf("[ERROR] Unable to migrate certificate storage: %v\n\nPlease follow instructions at:\nhttps://github.com/mholt/caddy/issues/902#issuecomment-228876011", err)
}
// convert mixed case folder and file names to lowercase
var done bool // walking is recursive and preloads the file names, so we must restart walk after a change until no changes
for !done {
done = true
filepath.Walk(string(newPath), func(path string, info os.FileInfo, err error) error {
// must be careful to only lowercase the base of the path, not the whole thing!!
base := filepath.Base(path)
if lowerBase := strings.ToLower(base); base != lowerBase {
lowerPath := filepath.Join(filepath.Dir(path), lowerBase)
err = os.Rename(path, lowerPath)
if err != nil {
log.Fatalf("[ERROR] Unable to lower-case: %v\n\nPlease follow instructions at:\nhttps://github.com/mholt/caddy/issues/902#issuecomment-228876011", err)
}
// terminate traversal and restart since Walk needs the updated file list with new file names
done = false
return errors.New("start over")
}
return nil
})
}
}
// setVersion figures out the version information
// based on variables set by -ldflags.
func setVersion() {
// A development build is one that's not at a tag or has uncommitted changes
devBuild = gitTag == "" || gitShortStat != ""
// Only set the appVersion if -ldflags was used
if gitNearestTag != "" || gitTag != "" {
if devBuild && gitNearestTag != "" {
appVersion = fmt.Sprintf("%s (+%s %s)",
strings.TrimPrefix(gitNearestTag, "v"), gitCommit, buildDate)
} else if gitTag != "" {
appVersion = strings.TrimPrefix(gitTag, "v")
}
}
}
// setCPU parses string cpu and sets GOMAXPROCS
// according to its value. It accepts either
// a number (e.g. 3) or a percent (e.g. 50%).
func setCPU(cpu string) error {
var numCPU int
availCPU := runtime.NumCPU()
if strings.HasSuffix(cpu, "%") {
// Percent
var percent float32
pctStr := cpu[:len(cpu)-1]
pctInt, err := strconv.Atoi(pctStr)
if err != nil || pctInt < 1 || pctInt > 100 {
return errors.New("invalid CPU value: percentage must be between 1-100")
}
percent = float32(pctInt) / 100
numCPU = int(float32(availCPU) * percent)
} else {
// Number
num, err := strconv.Atoi(cpu)
if err != nil || num < 1 {
return errors.New("invalid CPU value: provide a number or percent greater than 0")
}
numCPU = num
}
if numCPU > availCPU {
numCPU = availCPU
}
runtime.GOMAXPROCS(numCPU)
return nil
}
const appName = "Caddy"
// Flags that control program flow or startup
var (
serverType string
conf string
cpu string
logfile string
revoke string
version bool
plugins bool
)
// Build information obtained with the help of -ldflags
var (
appVersion = "(untracked dev build)" // inferred at startup
devBuild = true // inferred at startup
buildDate string // date -u
gitTag string // git describe --exact-match HEAD 2> /dev/null
gitNearestTag string // git describe --abbrev=0 --tags HEAD
gitCommit string // git rev-parse HEAD
gitShortStat string // git diff-index --shortstat
gitFilesModified string // git diff-index --name-only HEAD
)