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moby--moby/cli/flags/common.go

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package flags
import (
"fmt"
"os"
"path/filepath"
"github.com/Sirupsen/logrus"
"github.com/docker/docker/cliconfig"
"github.com/docker/docker/opts"
flag "github.com/docker/docker/pkg/mflag"
"github.com/docker/go-connections/tlsconfig"
)
const (
// DefaultTrustKeyFile is the default filename for the trust key
DefaultTrustKeyFile = "key.json"
// DefaultCaFile is the default filename for the CA pem file
DefaultCaFile = "ca.pem"
// DefaultKeyFile is the default filename for the key pem file
DefaultKeyFile = "key.pem"
// DefaultCertFile is the default filename for the cert pem file
DefaultCertFile = "cert.pem"
// TLSVerifyKey is the default flag name for the tls verification option
TLSVerifyKey = "tlsverify"
)
var (
dockerCertPath = os.Getenv("DOCKER_CERT_PATH")
dockerTLSVerify = os.Getenv("DOCKER_TLS_VERIFY") != ""
)
// CommonFlags are flags common to both the client and the daemon.
type CommonFlags struct {
FlagSet *flag.FlagSet
PostParse func()
Debug bool
Hosts []string
LogLevel string
TLS bool
TLSVerify bool
TLSOptions *tlsconfig.Options
TrustKey string
}
// InitCommonFlags initializes flags common to both client and daemon
func InitCommonFlags() *CommonFlags {
var commonFlags = &CommonFlags{FlagSet: new(flag.FlagSet)}
if dockerCertPath == "" {
dockerCertPath = cliconfig.ConfigDir()
}
commonFlags.PostParse = func() { postParseCommon(commonFlags) }
cmd := commonFlags.FlagSet
cmd.BoolVar(&commonFlags.Debug, []string{"D", "-debug"}, false, "Enable debug mode")
cmd.StringVar(&commonFlags.LogLevel, []string{"l", "-log-level"}, "info", "Set the logging level")
cmd.BoolVar(&commonFlags.TLS, []string{"-tls"}, false, "Use TLS; implied by --tlsverify")
cmd.BoolVar(&commonFlags.TLSVerify, []string{"-tlsverify"}, dockerTLSVerify, "Use TLS and verify the remote")
// TODO use flag flag.String([]string{"i", "-identity"}, "", "Path to libtrust key file")
var tlsOptions tlsconfig.Options
commonFlags.TLSOptions = &tlsOptions
cmd.StringVar(&tlsOptions.CAFile, []string{"-tlscacert"}, filepath.Join(dockerCertPath, DefaultCaFile), "Trust certs signed only by this CA")
cmd.StringVar(&tlsOptions.CertFile, []string{"-tlscert"}, filepath.Join(dockerCertPath, DefaultCertFile), "Path to TLS certificate file")
cmd.StringVar(&tlsOptions.KeyFile, []string{"-tlskey"}, filepath.Join(dockerCertPath, DefaultKeyFile), "Path to TLS key file")
cmd.Var(opts.NewNamedListOptsRef("hosts", &commonFlags.Hosts, opts.ValidateHost), []string{"H", "-host"}, "Daemon socket(s) to connect to")
return commonFlags
}
func postParseCommon(commonFlags *CommonFlags) {
cmd := commonFlags.FlagSet
SetDaemonLogLevel(commonFlags.LogLevel)
// Regardless of whether the user sets it to true or false, if they
// specify --tlsverify at all then we need to turn on tls
// TLSVerify can be true even if not set due to DOCKER_TLS_VERIFY env var, so we need
// to check that here as well
if cmd.IsSet("-"+TLSVerifyKey) || commonFlags.TLSVerify {
commonFlags.TLS = true
}
if !commonFlags.TLS {
commonFlags.TLSOptions = nil
} else {
tlsOptions := commonFlags.TLSOptions
tlsOptions.InsecureSkipVerify = !commonFlags.TLSVerify
// Reset CertFile and KeyFile to empty string if the user did not specify
// the respective flags and the respective default files were not found.
if !cmd.IsSet("-tlscert") {
if _, err := os.Stat(tlsOptions.CertFile); os.IsNotExist(err) {
tlsOptions.CertFile = ""
}
}
if !cmd.IsSet("-tlskey") {
if _, err := os.Stat(tlsOptions.KeyFile); os.IsNotExist(err) {
tlsOptions.KeyFile = ""
}
}
}
}
// SetDaemonLogLevel sets the logrus logging level
// TODO: this is a bad name, it applies to the client as well.
func SetDaemonLogLevel(logLevel string) {
if logLevel != "" {
lvl, err := logrus.ParseLevel(logLevel)
if err != nil {
fmt.Fprintf(os.Stderr, "Unable to parse logging level: %s\n", logLevel)
os.Exit(1)
}
logrus.SetLevel(lvl)
} else {
logrus.SetLevel(logrus.InfoLevel)
}
}