github.com/45cali/docker@v1.11.1/docker/common.go (about)

     1  package main
     2  
     3  import (
     4  	"fmt"
     5  	"os"
     6  	"path/filepath"
     7  
     8  	"github.com/Sirupsen/logrus"
     9  	"github.com/docker/docker/cli"
    10  	"github.com/docker/docker/cliconfig"
    11  	"github.com/docker/docker/opts"
    12  	flag "github.com/docker/docker/pkg/mflag"
    13  	"github.com/docker/go-connections/tlsconfig"
    14  )
    15  
    16  const (
    17  	defaultTrustKeyFile = "key.json"
    18  	defaultCaFile       = "ca.pem"
    19  	defaultKeyFile      = "key.pem"
    20  	defaultCertFile     = "cert.pem"
    21  	tlsVerifyKey        = "tlsverify"
    22  )
    23  
    24  var (
    25  	commonFlags = &cli.CommonFlags{FlagSet: new(flag.FlagSet)}
    26  
    27  	dockerCertPath  = os.Getenv("DOCKER_CERT_PATH")
    28  	dockerTLSVerify = os.Getenv("DOCKER_TLS_VERIFY") != ""
    29  )
    30  
    31  func init() {
    32  	if dockerCertPath == "" {
    33  		dockerCertPath = cliconfig.ConfigDir()
    34  	}
    35  
    36  	commonFlags.PostParse = postParseCommon
    37  
    38  	cmd := commonFlags.FlagSet
    39  
    40  	cmd.BoolVar(&commonFlags.Debug, []string{"D", "-debug"}, false, "Enable debug mode")
    41  	cmd.StringVar(&commonFlags.LogLevel, []string{"l", "-log-level"}, "info", "Set the logging level")
    42  	cmd.BoolVar(&commonFlags.TLS, []string{"-tls"}, false, "Use TLS; implied by --tlsverify")
    43  	cmd.BoolVar(&commonFlags.TLSVerify, []string{"-tlsverify"}, dockerTLSVerify, "Use TLS and verify the remote")
    44  
    45  	// TODO use flag flag.String([]string{"i", "-identity"}, "", "Path to libtrust key file")
    46  
    47  	var tlsOptions tlsconfig.Options
    48  	commonFlags.TLSOptions = &tlsOptions
    49  	cmd.StringVar(&tlsOptions.CAFile, []string{"-tlscacert"}, filepath.Join(dockerCertPath, defaultCaFile), "Trust certs signed only by this CA")
    50  	cmd.StringVar(&tlsOptions.CertFile, []string{"-tlscert"}, filepath.Join(dockerCertPath, defaultCertFile), "Path to TLS certificate file")
    51  	cmd.StringVar(&tlsOptions.KeyFile, []string{"-tlskey"}, filepath.Join(dockerCertPath, defaultKeyFile), "Path to TLS key file")
    52  
    53  	cmd.Var(opts.NewNamedListOptsRef("hosts", &commonFlags.Hosts, opts.ValidateHost), []string{"H", "-host"}, "Daemon socket(s) to connect to")
    54  }
    55  
    56  func postParseCommon() {
    57  	cmd := commonFlags.FlagSet
    58  
    59  	setDaemonLogLevel(commonFlags.LogLevel)
    60  
    61  	// Regardless of whether the user sets it to true or false, if they
    62  	// specify --tlsverify at all then we need to turn on tls
    63  	// TLSVerify can be true even if not set due to DOCKER_TLS_VERIFY env var, so we need to check that here as well
    64  	if cmd.IsSet("-"+tlsVerifyKey) || commonFlags.TLSVerify {
    65  		commonFlags.TLS = true
    66  	}
    67  
    68  	if !commonFlags.TLS {
    69  		commonFlags.TLSOptions = nil
    70  	} else {
    71  		tlsOptions := commonFlags.TLSOptions
    72  		tlsOptions.InsecureSkipVerify = !commonFlags.TLSVerify
    73  
    74  		// Reset CertFile and KeyFile to empty string if the user did not specify
    75  		// the respective flags and the respective default files were not found.
    76  		if !cmd.IsSet("-tlscert") {
    77  			if _, err := os.Stat(tlsOptions.CertFile); os.IsNotExist(err) {
    78  				tlsOptions.CertFile = ""
    79  			}
    80  		}
    81  		if !cmd.IsSet("-tlskey") {
    82  			if _, err := os.Stat(tlsOptions.KeyFile); os.IsNotExist(err) {
    83  				tlsOptions.KeyFile = ""
    84  			}
    85  		}
    86  	}
    87  }
    88  
    89  func setDaemonLogLevel(logLevel string) {
    90  	if logLevel != "" {
    91  		lvl, err := logrus.ParseLevel(logLevel)
    92  		if err != nil {
    93  			fmt.Fprintf(os.Stderr, "Unable to parse logging level: %s\n", logLevel)
    94  			os.Exit(1)
    95  		}
    96  		logrus.SetLevel(lvl)
    97  	} else {
    98  		logrus.SetLevel(logrus.InfoLevel)
    99  	}
   100  }