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-rw-r--r--cmd/podman/images/scp.go309
-rw-r--r--cmd/podman/images/scp_test.go46
-rw-r--r--cmd/podman/images/scp_utils.go87
-rw-r--r--cmd/podman/main.go4
4 files changed, 289 insertions, 157 deletions
diff --git a/cmd/podman/images/scp.go b/cmd/podman/images/scp.go
index 5c9cadc7a..f02a3c15e 100644
--- a/cmd/podman/images/scp.go
+++ b/cmd/podman/images/scp.go
@@ -6,18 +6,19 @@ import (
"io/ioutil"
urlP "net/url"
"os"
+ "os/exec"
+ "os/user"
"strconv"
"strings"
"github.com/containers/common/pkg/config"
"github.com/containers/podman/v3/cmd/podman/common"
- "github.com/containers/podman/v3/cmd/podman/parse"
"github.com/containers/podman/v3/cmd/podman/registry"
"github.com/containers/podman/v3/cmd/podman/system/connection"
"github.com/containers/podman/v3/libpod/define"
"github.com/containers/podman/v3/pkg/domain/entities"
"github.com/containers/podman/v3/pkg/rootless"
- "github.com/docker/distribution/reference"
+ "github.com/containers/podman/v3/utils"
scpD "github.com/dtylman/scp"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
@@ -28,8 +29,12 @@ import (
var (
saveScpDescription = `Securely copy an image from one host to another.`
imageScpCommand = &cobra.Command{
- Use: "scp [options] IMAGE [HOST::]",
- Annotations: map[string]string{registry.EngineMode: registry.ABIMode},
+ Use: "scp [options] IMAGE [HOST::]",
+ Annotations: map[string]string{
+ registry.UnshareNSRequired: "",
+ registry.ParentNSRequired: "",
+ registry.EngineMode: registry.ABIMode,
+ },
Long: saveScpDescription,
Short: "securely copy images",
RunE: scp,
@@ -40,7 +45,10 @@ var (
)
var (
- scpOpts entities.ImageScpOptions
+ parentFlags []string
+ source entities.ImageScpOptions
+ dest entities.ImageScpOptions
+ sshInfo entities.ImageScpConnections
)
func init() {
@@ -53,7 +61,7 @@ func init() {
func scpFlags(cmd *cobra.Command) {
flags := cmd.Flags()
- flags.BoolVarP(&scpOpts.Save.Quiet, "quiet", "q", false, "Suppress the output")
+ flags.BoolVarP(&source.Quiet, "quiet", "q", false, "Suppress the output")
}
func scp(cmd *cobra.Command, args []string) (finalErr error) {
@@ -61,24 +69,31 @@ func scp(cmd *cobra.Command, args []string) (finalErr error) {
// TODO add tag support for images
err error
)
- if scpOpts.Save.Quiet { // set quiet for both load and save
- scpOpts.Load.Quiet = true
+ for i, val := range os.Args {
+ if val == "image" {
+ break
+ }
+ if i == 0 {
+ continue
+ }
+ if strings.Contains(val, "CIRRUS") { // need to skip CIRRUS flags for testing suite purposes
+ continue
+ }
+ parentFlags = append(parentFlags, val)
}
- f, err := ioutil.TempFile("", "podman") // open temp file for load/save output
+ podman, err := os.Executable()
if err != nil {
return err
}
- defer os.Remove(f.Name())
-
- scpOpts.Save.Output = f.Name()
- scpOpts.Load.Input = scpOpts.Save.Output
- if err := parse.ValidateFileName(saveOpts.Output); err != nil {
+ f, err := ioutil.TempFile("", "podman") // open temp file for load/save output
+ if err != nil {
return err
}
confR, err := config.NewConfig("") // create a hand made config for the remote engine since we might use remote and native at once
if err != nil {
return errors.Wrapf(err, "could not make config")
}
+
abiEng, err := registry.NewImageEngine(cmd, args) // abi native engine
if err != nil {
return err
@@ -88,77 +103,115 @@ func scp(cmd *cobra.Command, args []string) (finalErr error) {
if err != nil {
return err
}
- serv, err := parseArgs(args, cfg) // parses connection data and "which way" we are loading and saving
+ locations := []*entities.ImageScpOptions{}
+ cliConnections := []string{}
+ flipConnections := false
+ for _, arg := range args {
+ loc, connect, err := parseImageSCPArg(arg)
+ if err != nil {
+ return err
+ }
+ locations = append(locations, loc)
+ cliConnections = append(cliConnections, connect...)
+ }
+ source = *locations[0]
+ switch {
+ case len(locations) > 1:
+ if flipConnections, err = validateSCPArgs(locations); err != nil {
+ return err
+ }
+ if flipConnections { // the order of cliConnections matters, we need to flip both arrays since the args are parsed separately sometimes.
+ connect := cliConnections[0]
+ cliConnections[0] = cliConnections[1]
+ cliConnections[1] = connect
+
+ loc := locations[0]
+ locations[0] = locations[1]
+ locations[1] = loc
+ }
+ dest = *locations[1]
+ case len(locations) == 1:
+ switch {
+ case len(locations[0].Image) == 0:
+ return errors.Wrapf(define.ErrInvalidArg, "no source image specified")
+ case len(locations[0].Image) > 0 && !locations[0].Remote && len(locations[0].User) == 0: // if we have podman image scp $IMAGE
+ return errors.Wrapf(define.ErrInvalidArg, "must specify a destination")
+ }
+ }
+
+ source.File = f.Name() // after parsing the arguments, set the file for the save/load
+ dest.File = source.File
+ if err = os.Remove(source.File); err != nil { // remove the file and simply use its name so podman creates the file upon save. avoids umask errors
+ return err
+ }
+
+ var serv map[string]config.Destination
+ serv, err = GetServiceInformation(cliConnections, cfg)
if err != nil {
return err
}
+
// TODO: Add podman remote support
confR.Engine = config.EngineConfig{Remote: true, CgroupManager: "cgroupfs", ServiceDestinations: serv} // pass the service dest (either remote or something else) to engine
+ saveCmd, loadCmd := createCommands(podman)
switch {
- case scpOpts.FromRemote: // if we want to load FROM the remote
- err = saveToRemote(scpOpts.SourceImageName, scpOpts.Save.Output, "", scpOpts.URI[0], scpOpts.Iden[0])
+ case source.Remote: // if we want to load FROM the remote, dest can either be local or remote in this case
+ err = saveToRemote(source.Image, source.File, "", sshInfo.URI[0], sshInfo.Identities[0])
if err != nil {
return err
}
- if scpOpts.ToRemote { // we want to load remote -> remote
- rep, err := loadToRemote(scpOpts.Save.Output, "", scpOpts.URI[1], scpOpts.Iden[1])
+ if dest.Remote { // we want to load remote -> remote, both source and dest are remote
+ rep, err := loadToRemote(dest.File, "", sshInfo.URI[1], sshInfo.Identities[1])
if err != nil {
return err
}
fmt.Println(rep)
break
}
- report, err := abiEng.Load(context.Background(), scpOpts.Load)
+ err = execPodman(podman, loadCmd)
if err != nil {
return err
}
- fmt.Println("Loaded image(s): " + strings.Join(report.Names, ","))
- case scpOpts.ToRemote: // remote host load
- scpOpts.Save.Format = "oci-archive"
- abiErr := abiEng.Save(context.Background(), scpOpts.SourceImageName, []string{}, scpOpts.Save) // save the image locally before loading it on remote, local, or ssh
- if abiErr != nil {
- errors.Wrapf(abiErr, "could not save image as specified")
- }
- rep, err := loadToRemote(scpOpts.Save.Output, "", scpOpts.URI[0], scpOpts.Iden[0])
+ case dest.Remote: // remote host load, implies source is local
+ err = execPodman(podman, saveCmd)
if err != nil {
return err
}
- fmt.Println(rep)
- // TODO: Add podman remote support
- default: // else native load
- scpOpts.Save.Format = "oci-archive"
- _, err := os.Open(scpOpts.Save.Output)
+ rep, err := loadToRemote(source.File, "", sshInfo.URI[0], sshInfo.Identities[0])
if err != nil {
return err
}
- if scpOpts.Tag != "" {
- return errors.Wrapf(define.ErrInvalidArg, "Renaming of an image is currently not supported")
- }
- scpOpts.Save.Format = "oci-archive"
- abiErr := abiEng.Save(context.Background(), scpOpts.SourceImageName, []string{}, scpOpts.Save) // save the image locally before loading it on remote, local, or ssh
- if abiErr != nil {
- return errors.Wrapf(abiErr, "could not save image as specified")
+ fmt.Println(rep)
+ if err = os.Remove(source.File); err != nil {
+ return err
}
- if !rootless.IsRootless() && scpOpts.Rootless {
- if scpOpts.User == "" {
- scpOpts.User = os.Getenv("SUDO_USER")
- if scpOpts.User == "" {
- return errors.New("could not obtain root user, make sure the environmental variable SUDO_USER is set, and that this command is being run as root")
+ // TODO: Add podman remote support
+ default: // else native load, both source and dest are local and transferring between users
+ if source.User == "" { // source user has to be set, destination does not
+ source.User = os.Getenv("USER")
+ if source.User == "" {
+ u, err := user.Current()
+ if err != nil {
+ return errors.Wrapf(err, "could not obtain user, make sure the environmental variable $USER is set")
}
+ source.User = u.Username
}
- err := abiEng.Transfer(context.Background(), scpOpts)
- if err != nil {
- return err
- }
- } else {
- rep, err := abiEng.Load(context.Background(), scpOpts.Load)
- if err != nil {
- return err
- }
- fmt.Println("Loaded image(s): " + strings.Join(rep.Names, ","))
+ }
+ err := abiEng.Transfer(context.Background(), source, dest, parentFlags)
+ if err != nil {
+ return err
}
}
+ src, err := json.MarshalIndent(source, "", " ")
+ if err != nil {
+ return err
+ }
+ dst, err := json.MarshalIndent(dest, "", " ")
+ if err != nil {
+ return err
+ }
+ fmt.Printf("SOURCE: %s\nDEST: %s\n", string(src), string(dst))
return nil
}
@@ -249,119 +302,28 @@ func createConnection(url *urlP.URL, iden string) (*ssh.Client, string, error) {
return dialAdd, file, nil
}
-// validateImageName makes sure that the image given is valid and no injections are occurring
-// we simply use this for error checking, bot setting the image
-func validateImageName(input string) error {
- // ParseNormalizedNamed transforms a shortname image into its
- // full name reference so busybox => docker.io/library/busybox
- // we want to keep our shortnames, so only return an error if
- // we cannot parse what th euser has given us
- _, err := reference.ParseNormalizedNamed(input)
- return err
-}
-
-// remoteArgLength is a helper function to simplify the extracting of host argument data
-// returns an int which contains the length of a specified index in a host::image string
-func remoteArgLength(input string, side int) int {
- return len((strings.Split(input, "::"))[side])
-}
-
-// parseArgs returns the valid connection data based off of the information provided by the user
-// args is an array of the command arguments and cfg is tooling configuration used to get service destinations
-// returned is serv and an error if applicable. serv is a map of service destinations with the connection name as the index
-// this connection name is intended to be used as EngineConfig.ServiceDestinations
-// this function modifies the global scpOpt entities: FromRemote, ToRemote, Connections, and SourceImageName
-func parseArgs(args []string, cfg *config.Config) (map[string]config.Destination, error) {
- serv := map[string]config.Destination{}
- cliConnections := []string{}
- switch len(args) {
- case 1:
- if strings.Contains(args[0], "localhost") {
- if strings.Split(args[0], "@")[0] != "root" {
- return nil, errors.Wrapf(define.ErrInvalidArg, "cannot transfer images from any user besides root using sudo")
- }
- scpOpts.Rootless = true
- scpOpts.SourceImageName = strings.Split(args[0], "::")[1]
- } else if strings.Contains(args[0], "::") {
- scpOpts.FromRemote = true
- cliConnections = append(cliConnections, args[0])
- } else {
- err := validateImageName(args[0])
- if err != nil {
- return nil, err
- }
- scpOpts.SourceImageName = args[0]
- }
- case 2:
- if strings.Contains(args[0], "localhost") || strings.Contains(args[1], "localhost") { // only supporting root to local using sudo at the moment
- if strings.Split(args[0], "@")[0] != "root" {
- return nil, errors.Wrapf(define.ErrInvalidArg, "currently, transferring images to a user account is not supported")
- }
- if len(strings.Split(args[0], "::")) > 1 {
- scpOpts.Rootless = true
- scpOpts.User = strings.Split(args[1], "@")[0]
- scpOpts.SourceImageName = strings.Split(args[0], "::")[1]
- } else {
- return nil, errors.Wrapf(define.ErrInvalidArg, "currently, you cannot rename images during the transfer or transfer them to a user account")
- }
- } else if strings.Contains(args[0], "::") {
- if !(strings.Contains(args[1], "::")) && remoteArgLength(args[0], 1) == 0 { // if an image is specified, this mean we are loading to our client
- cliConnections = append(cliConnections, args[0])
- scpOpts.ToRemote = true
- scpOpts.SourceImageName = args[1]
- } else if strings.Contains(args[1], "::") { // both remote clients
- scpOpts.FromRemote = true
- scpOpts.ToRemote = true
- if remoteArgLength(args[0], 1) == 0 { // is save->load w/ one image name
- cliConnections = append(cliConnections, args[0])
- cliConnections = append(cliConnections, args[1])
- } else if remoteArgLength(args[0], 1) > 0 && remoteArgLength(args[1], 1) > 0 {
- //in the future, this function could, instead of rejecting renames, also set a DestImageName field
- return nil, errors.Wrapf(define.ErrInvalidArg, "cannot specify an image rename")
- } else { // else its a load save (order of args)
- cliConnections = append(cliConnections, args[1])
- cliConnections = append(cliConnections, args[0])
- }
- } else {
- //in the future, this function could, instead of rejecting renames, also set a DestImageName field
- return nil, errors.Wrapf(define.ErrInvalidArg, "cannot specify an image rename")
- }
- } else if strings.Contains(args[1], "::") { // if we are given image host::
- if remoteArgLength(args[1], 1) > 0 {
- //in the future, this function could, instead of rejecting renames, also set a DestImageName field
- return nil, errors.Wrapf(define.ErrInvalidArg, "cannot specify an image rename")
- }
- err := validateImageName(args[0])
- if err != nil {
- return nil, err
- }
- scpOpts.SourceImageName = args[0]
- scpOpts.ToRemote = true
- cliConnections = append(cliConnections, args[1])
- } else {
- //in the future, this function could, instead of rejecting renames, also set a DestImageName field
- return nil, errors.Wrapf(define.ErrInvalidArg, "cannot specify an image rename")
- }
- }
+// GetSerivceInformation takes the parsed list of hosts to connect to and validates the information
+func GetServiceInformation(cliConnections []string, cfg *config.Config) (map[string]config.Destination, error) {
+ var serv map[string]config.Destination
var url string
var iden string
for i, val := range cliConnections {
splitEnv := strings.SplitN(val, "::", 2)
- scpOpts.Connections = append(scpOpts.Connections, splitEnv[0])
+ sshInfo.Connections = append(sshInfo.Connections, splitEnv[0])
if len(splitEnv[1]) != 0 {
err := validateImageName(splitEnv[1])
if err != nil {
return nil, err
}
- scpOpts.SourceImageName = splitEnv[1]
+ source.Image = splitEnv[1]
//TODO: actually use the new name given by the user
}
- conn, found := cfg.Engine.ServiceDestinations[scpOpts.Connections[i]]
+ conn, found := cfg.Engine.ServiceDestinations[sshInfo.Connections[i]]
if found {
url = conn.URI
iden = conn.Identity
} else { // no match, warn user and do a manual connection.
- url = "ssh://" + scpOpts.Connections[i]
+ url = "ssh://" + sshInfo.Connections[i]
iden = ""
logrus.Warnf("Unknown connection name given. Please use system connection add to specify the default remote socket location")
}
@@ -374,8 +336,45 @@ func parseArgs(args []string, cfg *config.Config) (map[string]config.Destination
return nil, err
}
}
- scpOpts.URI = append(scpOpts.URI, urlT)
- scpOpts.Iden = append(scpOpts.Iden, iden)
+ sshInfo.URI = append(sshInfo.URI, urlT)
+ sshInfo.Identities = append(sshInfo.Identities, iden)
}
return serv, nil
}
+
+// execPodman executes the podman save/load command given the podman binary
+func execPodman(podman string, command []string) error {
+ if rootless.IsRootless() {
+ cmd := exec.Command(podman)
+ utils.CreateSCPCommand(cmd, command[1:])
+ logrus.Debug("Executing podman command")
+ return cmd.Run()
+ }
+ machinectl, err := exec.LookPath("machinectl")
+ if err != nil {
+ cmd := exec.Command("su", "-l", "root", "--command")
+ cmd = utils.CreateSCPCommand(cmd, []string{strings.Join(command, " ")})
+ return cmd.Run()
+ }
+ cmd := exec.Command(machinectl, "shell", "-q", "root@.host")
+ cmd = utils.CreateSCPCommand(cmd, command)
+ logrus.Debug("Executing load command machinectl")
+ return cmd.Run()
+}
+
+// createCommands forms the podman save and load commands used by SCP
+func createCommands(podman string) ([]string, []string) {
+ var parentString string
+ quiet := ""
+ if source.Quiet {
+ quiet = "-q "
+ }
+ if len(parentFlags) > 0 {
+ parentString = strings.Join(parentFlags, " ") + " " // if there are parent args, an extra space needs to be added
+ } else {
+ parentString = strings.Join(parentFlags, " ")
+ }
+ loadCmd := strings.Split(fmt.Sprintf("%s %sload %s--input %s", podman, parentString, quiet, dest.File), " ")
+ saveCmd := strings.Split(fmt.Sprintf("%s %vsave %s--output %s %s", podman, parentString, quiet, source.File, source.Image), " ")
+ return saveCmd, loadCmd
+}
diff --git a/cmd/podman/images/scp_test.go b/cmd/podman/images/scp_test.go
new file mode 100644
index 000000000..d4d8f8e58
--- /dev/null
+++ b/cmd/podman/images/scp_test.go
@@ -0,0 +1,46 @@
+package images
+
+import (
+ "testing"
+
+ "github.com/containers/podman/v3/pkg/domain/entities"
+ "github.com/stretchr/testify/assert"
+)
+
+func TestParseSCPArgs(t *testing.T) {
+ args := []string{"alpine", "root@localhost::"}
+ var source *entities.ImageScpOptions
+ var dest *entities.ImageScpOptions
+ var err error
+ source, _, err = parseImageSCPArg(args[0])
+ assert.Nil(t, err)
+ assert.Equal(t, source.Image, "alpine")
+
+ dest, _, err = parseImageSCPArg(args[1])
+ assert.Nil(t, err)
+ assert.Equal(t, dest.Image, "")
+ assert.Equal(t, dest.User, "root")
+
+ args = []string{"root@localhost::alpine"}
+ source, _, err = parseImageSCPArg(args[0])
+ assert.Nil(t, err)
+ assert.Equal(t, source.User, "root")
+ assert.Equal(t, source.Image, "alpine")
+
+ args = []string{"charliedoern@192.168.68.126::alpine", "foobar@192.168.68.126::"}
+ source, _, err = parseImageSCPArg(args[0])
+ assert.Nil(t, err)
+ assert.True(t, source.Remote)
+ assert.Equal(t, source.Image, "alpine")
+
+ dest, _, err = parseImageSCPArg(args[1])
+ assert.Nil(t, err)
+ assert.True(t, dest.Remote)
+ assert.Equal(t, dest.Image, "")
+
+ args = []string{"charliedoern@192.168.68.126::alpine"}
+ source, _, err = parseImageSCPArg(args[0])
+ assert.Nil(t, err)
+ assert.True(t, source.Remote)
+ assert.Equal(t, source.Image, "alpine")
+}
diff --git a/cmd/podman/images/scp_utils.go b/cmd/podman/images/scp_utils.go
new file mode 100644
index 000000000..ebb874c1c
--- /dev/null
+++ b/cmd/podman/images/scp_utils.go
@@ -0,0 +1,87 @@
+package images
+
+import (
+ "strings"
+
+ "github.com/containers/image/v5/docker/reference"
+ "github.com/containers/podman/v3/libpod/define"
+ "github.com/containers/podman/v3/pkg/domain/entities"
+ "github.com/pkg/errors"
+)
+
+// parseImageSCPArg returns the valid connection, and source/destination data based off of the information provided by the user
+// arg is a string containing one of the cli arguments returned is a filled out source/destination options structs as well as a connections array and an error if applicable
+func parseImageSCPArg(arg string) (*entities.ImageScpOptions, []string, error) {
+ location := entities.ImageScpOptions{}
+ var err error
+ cliConnections := []string{}
+
+ switch {
+ case strings.Contains(arg, "@localhost"): // image transfer between users
+ location.User = strings.Split(arg, "@")[0]
+ location, err = validateImagePortion(location, arg)
+ if err != nil {
+ return nil, nil, err
+ }
+ case strings.Contains(arg, "::"):
+ location, err = validateImagePortion(location, arg)
+ if err != nil {
+ return nil, nil, err
+ }
+ location.Remote = true
+ cliConnections = append(cliConnections, arg)
+ default:
+ location.Image = arg
+ }
+ return &location, cliConnections, nil
+}
+
+// validateImagePortion is a helper function to validate the image name in an SCP argument
+func validateImagePortion(location entities.ImageScpOptions, arg string) (entities.ImageScpOptions, error) {
+ if remoteArgLength(arg, 1) > 0 {
+ err := validateImageName(strings.Split(arg, "::")[1])
+ if err != nil {
+ return location, err
+ }
+ location.Image = strings.Split(arg, "::")[1] // this will get checked/set again once we validate connections
+ }
+ return location, nil
+}
+
+// validateSCPArgs takes the array of source and destination options and checks for common errors
+func validateSCPArgs(locations []*entities.ImageScpOptions) (bool, error) {
+ if len(locations) > 2 {
+ return false, errors.Wrapf(define.ErrInvalidArg, "cannot specify more than two arguments")
+ }
+ switch {
+ case len(locations[0].Image) > 0 && len(locations[1].Image) > 0:
+ return false, errors.Wrapf(define.ErrInvalidArg, "cannot specify an image rename")
+ case len(locations[0].Image) == 0 && len(locations[1].Image) == 0:
+ return false, errors.Wrapf(define.ErrInvalidArg, "a source image must be specified")
+ case len(locations[0].Image) == 0 && len(locations[1].Image) != 0:
+ if locations[0].Remote && locations[1].Remote {
+ return true, nil // we need to flip the cliConnections array so the save/load connections are in the right place
+ }
+ }
+ return false, nil
+}
+
+// validateImageName makes sure that the image given is valid and no injections are occurring
+// we simply use this for error checking, bot setting the image
+func validateImageName(input string) error {
+ // ParseNormalizedNamed transforms a shortname image into its
+ // full name reference so busybox => docker.io/library/busybox
+ // we want to keep our shortnames, so only return an error if
+ // we cannot parse what the user has given us
+ _, err := reference.ParseNormalizedNamed(input)
+ return err
+}
+
+// remoteArgLength is a helper function to simplify the extracting of host argument data
+// returns an int which contains the length of a specified index in a host::image string
+func remoteArgLength(input string, side int) int {
+ if strings.Contains(input, "::") {
+ return len((strings.Split(input, "::"))[side])
+ }
+ return -1
+}
diff --git a/cmd/podman/main.go b/cmd/podman/main.go
index b7f5f1720..b38734617 100644
--- a/cmd/podman/main.go
+++ b/cmd/podman/main.go
@@ -52,14 +52,14 @@ func parseCommands() *cobra.Command {
// Command cannot be run rootless
_, found := c.Command.Annotations[registry.UnshareNSRequired]
if found {
- if rootless.IsRootless() && os.Getuid() != 0 {
+ if rootless.IsRootless() && os.Getuid() != 0 && c.Command.Name() != "scp" {
c.Command.RunE = func(cmd *cobra.Command, args []string) error {
return fmt.Errorf("cannot run command %q in rootless mode, must execute `podman unshare` first", cmd.CommandPath())
}
}
} else {
_, found = c.Command.Annotations[registry.ParentNSRequired]
- if rootless.IsRootless() && found {
+ if rootless.IsRootless() && found && c.Command.Name() != "scp" {
c.Command.RunE = func(cmd *cobra.Command, args []string) error {
return fmt.Errorf("cannot run command %q in rootless mode", cmd.CommandPath())
}
generated by cgit v1.2.3-54-g00ecf (git 2.39.0) at 2024-11-06 14:39:27 +0000