github.com/vincentwoo/docker@v0.7.3-0.20160116130405-82401a4b13c0/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  )
    22  
    23  var (
    24  	commonFlags = &cli.CommonFlags{FlagSet: new(flag.FlagSet)}
    25  
    26  	dockerCertPath  = os.Getenv("DOCKER_CERT_PATH")
    27  	dockerTLSVerify = os.Getenv("DOCKER_TLS_VERIFY") != ""
    28  )
    29  
    30  func init() {
    31  	if dockerCertPath == "" {
    32  		dockerCertPath = cliconfig.ConfigDir()
    33  	}
    34  
    35  	commonFlags.PostParse = postParseCommon
    36  
    37  	cmd := commonFlags.FlagSet
    38  
    39  	cmd.BoolVar(&commonFlags.Debug, []string{"D", "-debug"}, false, "Enable debug mode")
    40  	cmd.StringVar(&commonFlags.LogLevel, []string{"l", "-log-level"}, "info", "Set the logging level")
    41  	cmd.BoolVar(&commonFlags.TLS, []string{"-tls"}, false, "Use TLS; implied by --tlsverify")
    42  	cmd.BoolVar(&commonFlags.TLSVerify, []string{"-tlsverify"}, dockerTLSVerify, "Use TLS and verify the remote")
    43  
    44  	// TODO use flag flag.String([]string{"i", "-identity"}, "", "Path to libtrust key file")
    45  
    46  	var tlsOptions tlsconfig.Options
    47  	commonFlags.TLSOptions = &tlsOptions
    48  	cmd.StringVar(&tlsOptions.CAFile, []string{"-tlscacert"}, filepath.Join(dockerCertPath, defaultCaFile), "Trust certs signed only by this CA")
    49  	cmd.StringVar(&tlsOptions.CertFile, []string{"-tlscert"}, filepath.Join(dockerCertPath, defaultCertFile), "Path to TLS certificate file")
    50  	cmd.StringVar(&tlsOptions.KeyFile, []string{"-tlskey"}, filepath.Join(dockerCertPath, defaultKeyFile), "Path to TLS key file")
    51  
    52  	cmd.Var(opts.NewNamedListOptsRef("hosts", &commonFlags.Hosts, opts.ValidateHost), []string{"H", "-host"}, "Daemon socket(s) to connect to")
    53  }
    54  
    55  func postParseCommon() {
    56  	cmd := commonFlags.FlagSet
    57  
    58  	if commonFlags.LogLevel != "" {
    59  		lvl, err := logrus.ParseLevel(commonFlags.LogLevel)
    60  		if err != nil {
    61  			fmt.Fprintf(os.Stderr, "Unable to parse logging level: %s\n", commonFlags.LogLevel)
    62  			os.Exit(1)
    63  		}
    64  		logrus.SetLevel(lvl)
    65  	} else {
    66  		logrus.SetLevel(logrus.InfoLevel)
    67  	}
    68  
    69  	// Regardless of whether the user sets it to true or false, if they
    70  	// specify --tlsverify at all then we need to turn on tls
    71  	// TLSVerify can be true even if not set due to DOCKER_TLS_VERIFY env var, so we need to check that here as well
    72  	if cmd.IsSet("-tlsverify") || commonFlags.TLSVerify {
    73  		commonFlags.TLS = true
    74  	}
    75  
    76  	if !commonFlags.TLS {
    77  		commonFlags.TLSOptions = nil
    78  	} else {
    79  		tlsOptions := commonFlags.TLSOptions
    80  		tlsOptions.InsecureSkipVerify = !commonFlags.TLSVerify
    81  
    82  		// Reset CertFile and KeyFile to empty string if the user did not specify
    83  		// the respective flags and the respective default files were not found.
    84  		if !cmd.IsSet("-tlscert") {
    85  			if _, err := os.Stat(tlsOptions.CertFile); os.IsNotExist(err) {
    86  				tlsOptions.CertFile = ""
    87  			}
    88  		}
    89  		if !cmd.IsSet("-tlskey") {
    90  			if _, err := os.Stat(tlsOptions.KeyFile); os.IsNotExist(err) {
    91  				tlsOptions.KeyFile = ""
    92  			}
    93  		}
    94  	}
    95  }