Implement gvproxy networking using cmdline wrapper

Converts the host networking code in `podman machine` to use the
`GvproxyCommand` type introduced in containers/gvisor-tap-vsock#258

[NO NEW TESTS NEEDED]

Signed-off-by: Jake Correnti <jakecorrenti+github@proton.me>
This commit is contained in:
Jake Correnti
2023-08-23 13:17:40 -04:00
parent 63219d617e
commit 289e59ee1f
11 changed files with 561 additions and 61 deletions

1
go.mod
View File

@ -15,6 +15,7 @@ require (
github.com/containers/buildah v1.32.0
github.com/containers/common v0.56.1-0.20230919073449-d1d9d38d8282
github.com/containers/conmon v2.0.20+incompatible
github.com/containers/gvisor-tap-vsock v0.7.1-0.20230907154503-507f56851e8b
github.com/containers/image/v5 v5.28.0
github.com/containers/libhvee v0.4.1-0.20230905135638-56fb23533417
github.com/containers/ocicrypt v1.1.8

2
go.sum
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@ -255,6 +255,8 @@ github.com/containers/conmon v2.0.20+incompatible h1:YbCVSFSCqFjjVwHTPINGdMX1F6J
github.com/containers/conmon v2.0.20+incompatible/go.mod h1:hgwZ2mtuDrppv78a/cOBNiCm6O0UMWGx1mu7P00nu5I=
github.com/containers/image/v5 v5.28.0 h1:H4cWbdI88UA/mDb6SxMo3IxpmS1BSs/Kifvhwt9g048=
github.com/containers/image/v5 v5.28.0/go.mod h1:9aPnNkwHNHgGl9VlQxXEshvmOJRbdRAc1rNDD6sP2eU=
github.com/containers/gvisor-tap-vsock v0.7.1-0.20230907154503-507f56851e8b h1:1nH+VNnclNbAXwcsK2MkLT3gFWfbxasQOPBkj1DUmCI=
github.com/containers/gvisor-tap-vsock v0.7.1-0.20230907154503-507f56851e8b/go.mod h1:n7xPNoTHhif+K4S9zZMUmBNUvt5tcLfkHlQHreTLomM=
github.com/containers/libhvee v0.4.1-0.20230905135638-56fb23533417 h1:fr+j21PD+IYR6Kvlf2Zrm1x9oAjV12T2Vz3oZIGTusw=
github.com/containers/libhvee v0.4.1-0.20230905135638-56fb23533417/go.mod h1:HiXu8GZyjzGjU834fROO00Ka/4B1IM8qxy/6q6x1f+4=
github.com/containers/libtrust v0.0.0-20230121012942-c1716e8a8d01 h1:Qzk5C6cYglewc+UyGf6lc8Mj2UaPTHy/iF2De0/77CA=

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@ -18,6 +18,7 @@ import (
"time"
"github.com/containers/common/pkg/config"
gvproxy "github.com/containers/gvisor-tap-vsock/pkg/types"
"github.com/containers/podman/v4/libpod/define"
"github.com/containers/podman/v4/pkg/machine"
"github.com/containers/podman/v4/pkg/util"
@ -803,21 +804,19 @@ func getVMInfos() ([]*machine.ListResponse, error) {
// setupStartHostNetworkingCmd generates the cmd that will be used to start the
// host networking. Includes the ssh port, gvproxy pid file, gvproxy socket, and
// a debug flag depending on the logrus log level
func (m *MacMachine) setupStartHostNetworkingCmd(gvProxyBinary, forwardSock string, state machine.APIForwardingState) []string {
cmd := []string{gvProxyBinary}
// Add the ssh port
cmd = append(cmd, []string{"-ssh-port", fmt.Sprintf("%d", m.Port)}...)
// Add pid file
cmd = append(cmd, "-pid-file", m.GvProxyPid.GetPath())
// Add vfkit proxy listen
cmd = append(cmd, "-listen-vfkit", fmt.Sprintf("unixgram://%s", m.GvProxySock.GetPath()))
cmd, forwardSock, state = m.setupAPIForwarding(cmd)
if logrus.GetLevel() == logrus.DebugLevel {
cmd = append(cmd, "--debug")
fmt.Println(cmd)
func (m *MacMachine) setupStartHostNetworkingCmd() (gvproxy.GvproxyCommand, string, machine.APIForwardingState) {
cmd := gvproxy.NewGvproxyCommand()
cmd.SSHPort = m.Port
cmd.PidFile = m.GvProxyPid.GetPath()
cmd.AddVfkitSocket(fmt.Sprintf("unixgram://%s", m.GvProxySock.GetPath()))
cmd.Debug = logrus.IsLevelEnabled(logrus.DebugLevel)
cmd, forwardSock, state := m.setupAPIForwarding(cmd)
if cmd.Debug {
logrus.Debug(cmd.ToCmdline())
}
return cmd
return cmd, forwardSock, state
}
func (m *MacMachine) startHostNetworking(ioEater *os.File) (string, machine.APIForwardingState, error) {
@ -855,23 +854,22 @@ func (m *MacMachine) startHostNetworking(ioEater *os.File) (string, machine.APIF
return "", machine.NoForwarding, err
}
attr := new(os.ProcAttr)
gvproxy, err := cfg.FindHelperBinary("gvproxy", false)
gvproxyBinary, err := cfg.FindHelperBinary("gvproxy", false)
if err != nil {
return "", 0, err
}
attr.Files = []*os.File{ioEater, ioEater, ioEater}
cmd := m.setupStartHostNetworkingCmd(gvproxy, forwardSock, state)
_, err = os.StartProcess(cmd[0], cmd, attr)
if err != nil {
return "", 0, fmt.Errorf("unable to execute: %q: %w", cmd, err)
cmd, forwardSock, state := m.setupStartHostNetworkingCmd()
c := cmd.Cmd(gvproxyBinary)
c.ExtraFiles = []*os.File{ioEater, ioEater, ioEater}
if err := c.Start(); err != nil {
return "", 0, fmt.Errorf("unable to execute: %q: %w", cmd.ToCmdline(), err)
}
return forwardSock, state, nil
}
func (m *MacMachine) setupAPIForwarding(cmd []string) ([]string, string, machine.APIForwardingState) {
func (m *MacMachine) setupAPIForwarding(cmd gvproxy.GvproxyCommand) (gvproxy.GvproxyCommand, string, machine.APIForwardingState) {
socket, err := m.forwardSocketPath()
if err != nil {
return cmd, "", machine.NoForwarding
@ -885,10 +883,10 @@ func (m *MacMachine) setupAPIForwarding(cmd []string) ([]string, string, machine
forwardUser = "root"
}
cmd = append(cmd, []string{"-forward-sock", socket.GetPath()}...)
cmd = append(cmd, []string{"-forward-dest", destSock}...)
cmd = append(cmd, []string{"-forward-user", forwardUser}...)
cmd = append(cmd, []string{"-forward-identity", m.IdentityPath}...)
cmd.AddForwardSock(socket.GetPath())
cmd.AddForwardDest(destSock)
cmd.AddForwardUser(forwardUser)
cmd.AddForwardIdentity(m.IdentityPath)
link, err := m.userGlobalSocketLink()
if err != nil {

View File

@ -14,6 +14,7 @@ import (
"time"
"github.com/containers/common/pkg/config"
gvproxy "github.com/containers/gvisor-tap-vsock/pkg/types"
"github.com/containers/libhvee/pkg/hypervctl"
"github.com/containers/podman/v4/pkg/machine"
"github.com/containers/podman/v4/pkg/util"
@ -599,7 +600,6 @@ func (m *HyperVMachine) startHostNetworking() (string, machine.APIForwardingStat
return "", machine.NoForwarding, err
}
attr := new(os.ProcAttr)
dnr, dnw, err := machine.GetDevNullFiles()
if err != nil {
return "", machine.NoForwarding, err
@ -616,31 +616,31 @@ func (m *HyperVMachine) startHostNetworking() (string, machine.APIForwardingStat
}
}()
gvproxy, err := cfg.FindHelperBinary("gvproxy.exe", false)
gvproxyBinary, err := cfg.FindHelperBinary("gvproxy.exe", false)
if err != nil {
return "", 0, err
}
attr.Files = []*os.File{dnr, dnw, dnw}
cmd := []string{gvproxy}
// Add the ssh port
cmd = append(cmd, []string{"-ssh-port", fmt.Sprintf("%d", m.Port)}...)
cmd = append(cmd, []string{"-listen", fmt.Sprintf("vsock://%s", m.NetworkHVSock.KeyName)}...)
cmd = append(cmd, "-pid-file", m.GvProxyPid.GetPath())
cmd := gvproxy.NewGvproxyCommand()
cmd.SSHPort = m.Port
cmd.AddEndpoint(fmt.Sprintf("vsock://%s", m.NetworkHVSock.KeyName))
cmd.PidFile = m.GvProxyPid.GetPath()
cmd, forwardSock, state = m.setupAPIForwarding(cmd)
if logrus.GetLevel() == logrus.DebugLevel {
cmd = append(cmd, "--debug")
fmt.Println(cmd)
if logrus.IsLevelEnabled(logrus.DebugLevel) {
cmd.Debug = true
logrus.Debug(cmd)
}
_, err = os.StartProcess(cmd[0], cmd, attr)
if err != nil {
c := cmd.Cmd(gvproxyBinary)
c.ExtraFiles = []*os.File{dnr, dnw, dnw}
if err := c.Start(); err != nil {
return "", 0, fmt.Errorf("unable to execute: %q: %w", cmd, err)
}
return forwardSock, state, nil
}
func (m *HyperVMachine) setupAPIForwarding(cmd []string) ([]string, string, machine.APIForwardingState) {
func (m *HyperVMachine) setupAPIForwarding(cmd gvproxy.GvproxyCommand) (gvproxy.GvproxyCommand, string, machine.APIForwardingState) {
socket, err := m.forwardSocketPath()
if err != nil {
return cmd, "", machine.NoForwarding
@ -654,10 +654,10 @@ func (m *HyperVMachine) setupAPIForwarding(cmd []string) ([]string, string, mach
forwardUser = "root"
}
cmd = append(cmd, []string{"-forward-sock", socket.GetPath()}...)
cmd = append(cmd, []string{"-forward-dest", destSock}...)
cmd = append(cmd, []string{"-forward-user", forwardUser}...)
cmd = append(cmd, []string{"-forward-identity", m.IdentityPath}...)
cmd.AddForwardSock(socket.GetPath())
cmd.AddForwardDest(destSock)
cmd.AddForwardUser(forwardUser)
cmd.AddForwardIdentity(m.IdentityPath)
return cmd, "", machine.MachineLocal
}

View File

@ -22,6 +22,7 @@ import (
"time"
"github.com/containers/common/pkg/config"
gvproxy "github.com/containers/gvisor-tap-vsock/pkg/types"
"github.com/containers/podman/v4/pkg/machine"
"github.com/containers/podman/v4/pkg/rootless"
"github.com/containers/podman/v4/pkg/util"
@ -1325,7 +1326,6 @@ func (v *MachineVM) startHostNetworking() (string, machine.APIForwardingState, e
return "", machine.NoForwarding, err
}
attr := new(os.ProcAttr)
dnr, dnw, err := machine.GetDevNullFiles()
if err != nil {
return "", machine.NoForwarding, err
@ -1334,11 +1334,10 @@ func (v *MachineVM) startHostNetworking() (string, machine.APIForwardingState, e
defer dnr.Close()
defer dnw.Close()
attr.Files = []*os.File{dnr, dnw, dnw}
cmd := []string{binary}
cmd = append(cmd, []string{"-listen-qemu", fmt.Sprintf("unix://%s", v.QMPMonitor.Address.GetPath()), "-pid-file", v.PidFilePath.GetPath()}...)
// Add the ssh port
cmd = append(cmd, []string{"-ssh-port", fmt.Sprintf("%d", v.Port)}...)
cmd := gvproxy.NewGvproxyCommand()
cmd.AddQemuSocket(fmt.Sprintf("unix://%s", v.QMPMonitor.Address.GetPath()))
cmd.PidFile = v.PidFilePath.GetPath()
cmd.SSHPort = v.Port
var forwardSock string
var state machine.APIForwardingState
@ -1346,18 +1345,20 @@ func (v *MachineVM) startHostNetworking() (string, machine.APIForwardingState, e
cmd, forwardSock, state = v.setupAPIForwarding(cmd)
}
if logrus.GetLevel() == logrus.DebugLevel {
cmd = append(cmd, "--debug")
fmt.Println(cmd)
if logrus.IsLevelEnabled(logrus.DebugLevel) {
cmd.Debug = true
logrus.Debug(cmd)
}
_, err = os.StartProcess(cmd[0], cmd, attr)
if err != nil {
return "", 0, fmt.Errorf("unable to execute: %q: %w", cmd, err)
c := cmd.Cmd(binary)
c.ExtraFiles = []*os.File{dnr, dnw, dnw}
if err := c.Start(); err != nil {
return "", 0, fmt.Errorf("unable to execute: %q: %w", cmd.ToCmdline(), err)
}
return forwardSock, state, nil
}
func (v *MachineVM) setupAPIForwarding(cmd []string) ([]string, string, machine.APIForwardingState) {
func (v *MachineVM) setupAPIForwarding(cmd gvproxy.GvproxyCommand) (gvproxy.GvproxyCommand, string, machine.APIForwardingState) {
socket, err := v.forwardSocketPath()
if err != nil {
@ -1372,10 +1373,10 @@ func (v *MachineVM) setupAPIForwarding(cmd []string) ([]string, string, machine.
forwardUser = "root"
}
cmd = append(cmd, []string{"-forward-sock", socket.GetPath()}...)
cmd = append(cmd, []string{"-forward-dest", destSock}...)
cmd = append(cmd, []string{"-forward-user", forwardUser}...)
cmd = append(cmd, []string{"-forward-identity", v.IdentityPath}...)
cmd.AddForwardSock(socket.GetPath())
cmd.AddForwardDest(destSock)
cmd.AddForwardUser(forwardUser)
cmd.AddForwardIdentity(v.IdentityPath)
// The linking pattern is /var/run/docker.sock -> user global sock (link) -> machine sock (socket)
// This allows the helper to only have to maintain one constant target to the user, which can be

202
vendor/github.com/containers/gvisor-tap-vsock/LICENSE generated vendored Normal file
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@ -0,0 +1,202 @@
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View File

@ -0,0 +1,80 @@
package types
import (
"net"
"regexp"
)
type Configuration struct {
// Print packets on stderr
Debug bool
// Record all packets coming in and out in a file that can be read by Wireshark (pcap)
CaptureFile string
// Length of packet
// Larger packets means less packets to exchange for the same amount of data (and less protocol overhead)
MTU int
// Network reserved for the virtual network
Subnet string
// IP address of the virtual gateway
GatewayIP string
// MAC address of the virtual gateway
GatewayMacAddress string
// Built-in DNS records that will be served by the DNS server embedded in the gateway
DNS []Zone
// List of search domains that will be added in all DHCP replies
DNSSearchDomains []string
// Port forwarding between the machine running the gateway and the virtual network.
Forwards map[string]string
// Address translation of incoming traffic.
// Useful for reaching the host itself (localhost) from the virtual network.
NAT map[string]string
// IPs assigned to the gateway that can answer to ARP requests
GatewayVirtualIPs []string
// DHCP static leases. Allow to assign pre-defined IP to virtual machine based on the MAC address
DHCPStaticLeases map[string]string
// Only for Hyperkit
// Allow to assign a pre-defined MAC address to an Hyperkit VM
VpnKitUUIDMacAddresses map[string]string
// Protocol to be used. Only for /connect mux
Protocol Protocol
}
type Protocol string
const (
// HyperKitProtocol is handshake, then 16bits little endian size of packet, then the packet.
HyperKitProtocol Protocol = "hyperkit"
// QemuProtocol is 32bits big endian size of the packet, then the packet.
QemuProtocol Protocol = "qemu"
// BessProtocol transfers bare L2 packets as SOCK_SEQPACKET.
BessProtocol Protocol = "bess"
// StdioProtocol is HyperKitProtocol without the handshake
StdioProtocol Protocol = "stdio"
// VfkitProtocol transfers bare L2 packets as SOCK_DGRAM.
VfkitProtocol Protocol = "vfkit"
)
type Zone struct {
Name string
Records []Record
DefaultIP net.IP
}
type Record struct {
Name string
IP net.IP
Regexp *regexp.Regexp
}

View File

@ -0,0 +1,189 @@
package types
import (
"os/exec"
"strconv"
)
type GvproxyCommand struct {
// Print packets on stderr
Debug bool
// Length of packet
// Larger packets means less packets to exchange for the same amount of data (and less protocol overhead)
MTU int
// Values passed in by forward-xxx flags in commandline (forward-xxx:info)
forwardInfo map[string][]string
// List of endpoints the user wants to listen to
endpoints []string
// Map of different sockets provided by user (socket-type flag:socket)
sockets map[string]string
// File where gvproxy's pid is stored
PidFile string
// SSHPort to access the guest VM
SSHPort int
}
func NewGvproxyCommand() GvproxyCommand {
return GvproxyCommand{
MTU: 1500,
SSHPort: 2222,
endpoints: []string{},
forwardInfo: map[string][]string{},
sockets: map[string]string{},
}
}
func (c *GvproxyCommand) checkSocketsInitialized() {
if len(c.sockets) < 1 {
c.sockets = map[string]string{}
}
}
func (c *GvproxyCommand) checkForwardInfoInitialized() {
if len(c.forwardInfo) < 1 {
c.forwardInfo = map[string][]string{}
}
}
func (c *GvproxyCommand) AddEndpoint(endpoint string) {
if len(c.endpoints) < 1 {
c.endpoints = []string{}
}
c.endpoints = append(c.endpoints, endpoint)
}
func (c *GvproxyCommand) AddVpnkitSocket(socket string) {
c.checkSocketsInitialized()
c.sockets["listen-vpnkit"] = socket
}
func (c *GvproxyCommand) AddQemuSocket(socket string) {
c.checkSocketsInitialized()
c.sockets["listen-qemu"] = socket
}
func (c *GvproxyCommand) AddBessSocket(socket string) {
c.checkSocketsInitialized()
c.sockets["listen-bess"] = socket
}
func (c *GvproxyCommand) AddStdioSocket(socket string) {
c.checkSocketsInitialized()
c.sockets["listen-stdio"] = socket
}
func (c *GvproxyCommand) AddVfkitSocket(socket string) {
c.checkSocketsInitialized()
c.sockets["listen-vfkit"] = socket
}
func (c *GvproxyCommand) addForwardInfo(flag, value string) {
c.forwardInfo[flag] = append(c.forwardInfo[flag], value)
}
func (c *GvproxyCommand) AddForwardSock(socket string) {
c.checkForwardInfoInitialized()
c.addForwardInfo("forward-sock", socket)
}
func (c *GvproxyCommand) AddForwardDest(dest string) {
c.checkForwardInfoInitialized()
c.addForwardInfo("forward-dest", dest)
}
func (c *GvproxyCommand) AddForwardUser(user string) {
c.checkForwardInfoInitialized()
c.addForwardInfo("forward-user", user)
}
func (c *GvproxyCommand) AddForwardIdentity(identity string) {
c.checkForwardInfoInitialized()
c.addForwardInfo("forward-identity", identity)
}
// socketsToCmdline converts Command.sockets to a commandline format
func (c *GvproxyCommand) socketsToCmdline() []string {
args := []string{}
for socketFlag, socket := range c.sockets {
if socket != "" {
args = append(args, "-"+socketFlag, socket)
}
}
return args
}
// forwardInfoToCmdline converts Command.forwardInfo to a commandline format
func (c *GvproxyCommand) forwardInfoToCmdline() []string {
args := []string{}
for forwardInfoFlag, forwardInfo := range c.forwardInfo {
for _, i := range forwardInfo {
if i != "" {
args = append(args, "-"+forwardInfoFlag, i)
}
}
}
return args
}
// endpointsToCmdline converts Command.endpoints to a commandline format
func (c *GvproxyCommand) endpointsToCmdline() []string {
args := []string{}
for _, endpoint := range c.endpoints {
if endpoint != "" {
args = append(args, "-listen", endpoint)
}
}
return args
}
// ToCmdline converts Command to a properly formatted command for gvproxy based
// on its fields
func (c *GvproxyCommand) ToCmdline() []string {
args := []string{}
// listen (endpoints)
args = append(args, c.endpointsToCmdline()...)
// debug
if c.Debug {
args = append(args, "-debug")
}
// mtu
args = append(args, "-mtu", strconv.Itoa(c.MTU))
// ssh-port
args = append(args, "-ssh-port", strconv.Itoa(c.SSHPort))
// sockets
args = append(args, c.socketsToCmdline()...)
// forward info
args = append(args, c.forwardInfoToCmdline()...)
// pid-file
if c.PidFile != "" {
args = append(args, "-pid-file", c.PidFile)
}
return args
}
// Cmd converts Command to a commandline format and returns an exec.Cmd which
// can be executed by os/exec
func (c *GvproxyCommand) Cmd(gvproxyPath string) *exec.Cmd {
return exec.Command(gvproxyPath, c.ToCmdline()...) // #nosec G204
}

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@ -0,0 +1,21 @@
package types
type TransportProtocol string
const (
UDP TransportProtocol = "udp"
TCP TransportProtocol = "tcp"
UNIX TransportProtocol = "unix"
NPIPE TransportProtocol = "npipe"
)
type ExposeRequest struct {
Local string `json:"local"`
Remote string `json:"remote"`
Protocol TransportProtocol `json:"protocol"`
}
type UnexposeRequest struct {
Local string `json:"local"`
Protocol TransportProtocol `json:"protocol"`
}

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@ -0,0 +1,3 @@
package types
const ConnectPath = "/connect"

3
vendor/modules.txt vendored
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@ -223,6 +223,9 @@ github.com/containers/common/version
# github.com/containers/conmon v2.0.20+incompatible
## explicit
github.com/containers/conmon/runner/config
# github.com/containers/gvisor-tap-vsock v0.7.1-0.20230907154503-507f56851e8b
## explicit; go 1.20
github.com/containers/gvisor-tap-vsock/pkg/types
# github.com/containers/image/v5 v5.28.0
## explicit; go 1.19
github.com/containers/image/v5/copy