package main import ( "os" "path/filepath" cliconfig "github.com/docker/docker/cli/config" "github.com/docker/docker/daemon/config" "github.com/docker/docker/opts" "github.com/docker/go-connections/tlsconfig" "github.com/spf13/pflag" ) const ( // 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" // FlagTLSVerify is the flag name for the TLS verification option FlagTLSVerify = "tlsverify" // FlagTLS is the flag name for the TLS option FlagTLS = "tls" // DefaultTLSValue is the default value used for setting the tls option for tcp connections DefaultTLSValue = false ) var ( dockerCertPath = os.Getenv("DOCKER_CERT_PATH") dockerTLSVerify = os.Getenv("DOCKER_TLS_VERIFY") != "" ) type daemonOptions struct { configFile string daemonConfig *config.Config flags *pflag.FlagSet Debug bool Hosts []string LogLevel string TLS bool TLSVerify bool TLSOptions *tlsconfig.Options Validate bool } // newDaemonOptions returns a new daemonFlags func newDaemonOptions(config *config.Config) *daemonOptions { return &daemonOptions{ daemonConfig: config, } } // installFlags adds flags for the common options on the FlagSet func (o *daemonOptions) installFlags(flags *pflag.FlagSet) { if dockerCertPath == "" { // cliconfig.Dir returns $DOCKER_CONFIG or ~/.docker. // cliconfig.Dir does not look up $XDG_CONFIG_HOME dockerCertPath = cliconfig.Dir() } flags.BoolVarP(&o.Debug, "debug", "D", false, "Enable debug mode") flags.BoolVar(&o.Validate, "validate", false, "Validate daemon configuration and exit") flags.StringVarP(&o.LogLevel, "log-level", "l", "info", `Set the logging level ("debug"|"info"|"warn"|"error"|"fatal")`) flags.BoolVar(&o.TLS, FlagTLS, DefaultTLSValue, "Use TLS; implied by --tlsverify") flags.BoolVar(&o.TLSVerify, FlagTLSVerify, dockerTLSVerify || DefaultTLSValue, "Use TLS and verify the remote") // TODO use flag flags.String("identity"}, "i", "", "Path to libtrust key file") o.TLSOptions = &tlsconfig.Options{} tlsOptions := o.TLSOptions flags.StringVar(&tlsOptions.CAFile, "tlscacert", filepath.Join(dockerCertPath, DefaultCaFile), "Trust certs signed only by this CA") flags.StringVar(&tlsOptions.CertFile, "tlscert", filepath.Join(dockerCertPath, DefaultCertFile), "Path to TLS certificate file") flags.StringVar(&tlsOptions.KeyFile, "tlskey", filepath.Join(dockerCertPath, DefaultKeyFile), "Path to TLS key file") hostOpt := opts.NewNamedListOptsRef("hosts", &o.Hosts, opts.ValidateHost) flags.VarP(hostOpt, "host", "H", "Daemon socket(s) to connect to") } // setDefaultOptions sets default values for options after flag parsing is // complete func (o *daemonOptions) setDefaultOptions() { // 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 o.flags.Changed(FlagTLSVerify) || o.TLSVerify { o.TLS = true } if o.TLS && !o.flags.Changed(FlagTLSVerify) { // Enable tls verification unless explicitly disabled o.TLSVerify = true } if !o.TLS { o.TLSOptions = nil } else { o.TLSOptions.InsecureSkipVerify = !o.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 !o.flags.Changed("tlscert") { if _, err := os.Stat(o.TLSOptions.CertFile); os.IsNotExist(err) { o.TLSOptions.CertFile = "" } } if !o.flags.Changed("tlskey") { if _, err := os.Stat(o.TLSOptions.KeyFile); os.IsNotExist(err) { o.TLSOptions.KeyFile = "" } } } }