// RunPort is the handler for 'scw port'
func RunPort(ctx CommandContext, args PortArgs) error {
serverID := ctx.API.GetServerID(args.Server)
server, err := ctx.API.GetServer(serverID)
if err != nil {
return fmt.Errorf("failed to get server information for %s: %v", serverID, err)
}
// Resolve gateway
if args.Gateway == "" {
args.Gateway = ctx.Getenv("SCW_GATEWAY")
}
var gateway string
if args.Gateway == serverID || args.Gateway == args.Server {
gateway = ""
} else {
gateway, err = api.ResolveGateway(ctx.API, args.Gateway)
if err != nil {
return fmt.Errorf("cannot resolve Gateway '%s': %v", args.Gateway, err)
}
}
command := []string{"netstat -lutn 2>/dev/null | grep LISTEN"}
err = utils.SSHExec(server.PublicAddress.IP, server.PrivateIP, command, true, gateway)
if err != nil {
return fmt.Errorf("command execution failed: %v", err)
}
return nil
}
func waitSSHConnection(ctx CommandContext, args RunArgs, serverID string) (chan notifSSHConnection, string, error) {
notif := make(chan notifSSHConnection)
// Resolve gateway
gateway, err := api.ResolveGateway(ctx.API, args.Gateway)
if err != nil {
return nil, "", fmt.Errorf("cannot resolve Gateway '%s': %v", args.Gateway, err)
}
// waiting for server to be ready
logrus.Debug("Waiting for server to be ready")
// We wait for 30 seconds, which is the minimal amount of time needed by a server to boot
go func() {
server, err := api.WaitForServerReady(ctx.API, serverID, gateway)
if err != nil {
notif <- notifSSHConnection{
err: fmt.Errorf("cannot get access to server %s: %v", serverID, err),
}
return
}
logrus.Debugf("SSH server is available: %s:22", server.PublicAddress.IP)
logrus.Info("Server is ready !")
notif <- notifSSHConnection{
server: server,
}
}()
return notif, gateway, nil
}
// RunTop is the handler for 'scw top'
func RunTop(ctx CommandContext, args TopArgs) error {
serverID := ctx.API.GetServerID(args.Server)
command := "ps"
server, err := ctx.API.GetServer(serverID)
if err != nil {
return fmt.Errorf("failed to get server information for %s: %v", serverID, err)
}
// Resolve gateway
if args.Gateway == "" {
args.Gateway = ctx.Getenv("SCW_GATEWAY")
}
var gateway string
if args.Gateway == serverID || args.Gateway == args.Server {
gateway = ""
} else {
gateway, err = api.ResolveGateway(ctx.API, args.Gateway)
if err != nil {
return fmt.Errorf("cannot resolve Gateway '%s': %v", args.Gateway, err)
}
}
sshCommand := utils.NewSSHExecCmd(server.PublicAddress.IP, server.PrivateIP, true, []string{command}, gateway)
logrus.Debugf("Executing: %s", sshCommand)
out, err := exec.Command("ssh", sshCommand.Slice()[1:]...).CombinedOutput()
fmt.Printf("%s", out)
return err
}
// RunLogs is the handler for 'scw logs'
func RunLogs(ctx CommandContext, args LogsArgs) error {
serverID, err := ctx.API.GetServerID(args.Server)
if err != nil {
return err
}
server, err := ctx.API.GetServer(serverID)
if err != nil {
return fmt.Errorf("failed to get server information for %s: %v", serverID, err)
}
// FIXME: switch to serial history when API is ready
// Resolve gateway
if args.Gateway == "" {
args.Gateway = ctx.Getenv("SCW_GATEWAY")
}
var gateway string
if args.Gateway == serverID || args.Gateway == args.Server {
gateway = ""
} else {
gateway, err = api.ResolveGateway(ctx.API, args.Gateway)
if err != nil {
return fmt.Errorf("cannot resolve Gateway '%s': %v", args.Gateway, err)
}
}
command := []string{"dmesg"}
err = utils.SSHExec(server.PublicAddress.IP, server.PrivateIP, args.SSHUser, args.SSHPort, command, true, gateway)
if err != nil {
return fmt.Errorf("command execution failed: %v", err)
}
return nil
}
// RunKill is the handler for 'scw kill'
func RunKill(ctx CommandContext, args KillArgs) error {
serverID := ctx.API.GetServerID(args.Server)
command := "halt"
server, err := ctx.API.GetServer(serverID)
if err != nil {
return fmt.Errorf("failed to get server information for %s: %v", serverID, err)
}
// Resolve gateway
if args.Gateway == "" {
args.Gateway = ctx.Getenv("SCW_GATEWAY")
}
var gateway string
if args.Gateway == serverID || args.Gateway == args.Server {
gateway = ""
} else {
gateway, err = api.ResolveGateway(ctx.API, args.Gateway)
if err != nil {
return fmt.Errorf("cannot resolve Gateway '%s': %v", args.Gateway, err)
}
}
sshCommand := utils.NewSSHExecCmd(server.PublicAddress.IP, server.PrivateIP, true, []string{command}, gateway)
logrus.Debugf("Executing: %s", sshCommand)
spawn := exec.Command("ssh", sshCommand.Slice()[1:]...)
spawn.Stdout = ctx.Stdout
spawn.Stdin = ctx.Stdin
spawn.Stderr = ctx.Stderr
return spawn.Run()
}
// TarFromSource creates a stream buffer with the tarballed content of the user source
func TarFromSource(ctx CommandContext, source string, gateway string) (*io.ReadCloser, error) {
var tarOutputStream io.ReadCloser
// source is a server address + path (scp-like uri)
if strings.Contains(source, ":") {
logrus.Debugf("Creating a tarball remotely and streaming it using SSH")
serverParts := strings.Split(source, ":")
if len(serverParts) != 2 {
return nil, fmt.Errorf("invalid source uri, see 'scw cp -h' for usage")
}
serverID, err := ctx.API.GetServerID(serverParts[0])
if err != nil {
return nil, err
}
server, err := ctx.API.GetServer(serverID)
if err != nil {
return nil, err
}
dir, base := utils.PathToTARPathparts(serverParts[1])
logrus.Debugf("Equivalent to 'scp root@%s:%s/%s ...'", server.PublicAddress.IP, dir, base)
// remoteCommand is executed on the remote server
// it streams a tarball raw content
remoteCommand := []string{"tar"}
remoteCommand = append(remoteCommand, "-C", dir)
if ctx.Getenv("DEBUG") == "1" {
remoteCommand = append(remoteCommand, "-v")
}
remoteCommand = append(remoteCommand, "-cf", "-")
remoteCommand = append(remoteCommand, base)
// Resolve gateway
if gateway == "" {
gateway = ctx.Getenv("SCW_GATEWAY")
}
if gateway == serverID || gateway == serverParts[0] {
gateway = ""
} else {
gateway, err = api.ResolveGateway(ctx.API, gateway)
if err != nil {
return nil, fmt.Errorf("cannot resolve Gateway '%s': %v", gateway, err)
}
}
// execCmd contains the ssh connection + the remoteCommand
sshCommand := utils.NewSSHExecCmd(server.PublicAddress.IP, server.PrivateIP, false, remoteCommand, gateway)
logrus.Debugf("Executing: %s", sshCommand)
spawnSrc := exec.Command("ssh", sshCommand.Slice()[1:]...)
tarOutputStream, err = spawnSrc.StdoutPipe()
if err != nil {
return nil, err
}
tarErrorStream, err := spawnSrc.StderrPipe()
if err != nil {
return nil, err
}
defer tarErrorStream.Close()
io.Copy(ctx.Stderr, tarErrorStream)
err = spawnSrc.Start()
if err != nil {
return nil, err
}
defer spawnSrc.Wait()
return &tarOutputStream, nil
}
// source is stdin
if source == "-" {
logrus.Debugf("Streaming tarball from stdin")
// FIXME: should be ctx.Stdin
tarOutputStream = os.Stdin
return &tarOutputStream, nil
}
// source is a path on localhost
logrus.Debugf("Taring local path %s", source)
path, err := filepath.Abs(source)
if err != nil {
return nil, err
}
path, err = filepath.EvalSymlinks(path)
if err != nil {
return nil, err
}
logrus.Debugf("Real local path is %s", path)
dir, base := utils.PathToTARPathparts(path)
tarOutputStream, err = archive.TarWithOptions(dir, &archive.TarOptions{
Compression: archive.Uncompressed,
IncludeFiles: []string{base},
})
if err != nil {
return nil, err
}
return &tarOutputStream, nil
}
// UntarToDest writes to user destination the streamed tarball in input
func UntarToDest(ctx CommandContext, sourceStream *io.ReadCloser, destination string, gateway string) error {
// destination is a server address + path (scp-like uri)
if strings.Contains(destination, ":") {
logrus.Debugf("Streaming using ssh and untaring remotely")
serverParts := strings.Split(destination, ":")
if len(serverParts) != 2 {
return fmt.Errorf("invalid destination uri, see 'scw cp -h' for usage")
}
serverID, err := ctx.API.GetServerID(serverParts[0])
if err != nil {
return err
}
server, err := ctx.API.GetServer(serverID)
if err != nil {
return err
}
// remoteCommand is executed on the remote server
// it streams a tarball raw content
remoteCommand := []string{"tar"}
remoteCommand = append(remoteCommand, "-C", serverParts[1])
if ctx.Getenv("DEBUG") == "1" {
remoteCommand = append(remoteCommand, "-v")
}
remoteCommand = append(remoteCommand, "-xf", "-")
// Resolve gateway
if gateway == "" {
gateway = ctx.Getenv("SCW_GATEWAY")
}
if gateway == serverID || gateway == serverParts[0] {
gateway = ""
} else {
gateway, err = api.ResolveGateway(ctx.API, gateway)
if err != nil {
return fmt.Errorf("cannot resolve Gateway '%s': %v", gateway, err)
}
}
// execCmd contains the ssh connection + the remoteCommand
sshCommand := utils.NewSSHExecCmd(server.PublicAddress.IP, server.PrivateIP, false, remoteCommand, gateway)
logrus.Debugf("Executing: %s", sshCommand)
spawnDst := exec.Command("ssh", sshCommand.Slice()[1:]...)
untarInputStream, err := spawnDst.StdinPipe()
if err != nil {
return err
}
defer untarInputStream.Close()
// spawnDst.Stderr = ctx.Stderr
// spawnDst.Stdout = ctx.Stdout
err = spawnDst.Start()
if err != nil {
return err
}
_, err = io.Copy(untarInputStream, *sourceStream)
return err
}
// destination is stdout
if destination == "-" { // stdout
logrus.Debugf("Writing sourceStream(%v) to ctx.Stdout(%v)", sourceStream, ctx.Stdout)
_, err := io.Copy(ctx.Stdout, *sourceStream)
return err
}
// destination is a path on localhost
logrus.Debugf("Untaring to local path: %s", destination)
err := archive.Untar(*sourceStream, destination, &archive.TarOptions{NoLchown: true})
return err
}
// RunExec is the handler for 'scw exec'
func RunExec(ctx CommandContext, args ExecArgs) error {
var fingerprints []string
done := make(chan struct{})
serverID, err := ctx.API.GetServerID(args.Server)
if err != nil {
return err
}
go func() {
fingerprints = ctx.API.GetSSHFingerprintFromServer(serverID)
close(done)
}()
// Resolve gateway
if args.Gateway == "" {
args.Gateway = ctx.Getenv("SCW_GATEWAY")
}
var gateway string
if args.Gateway == serverID || args.Gateway == args.Server {
logrus.Debugf("The server and the gateway are the same host, using direct access to the server")
gateway = ""
} else {
gateway, err = api.ResolveGateway(ctx.API, args.Gateway)
if err != nil {
return fmt.Errorf("Cannot resolve Gateway '%s': %v", args.Gateway, err)
}
if gateway != "" {
logrus.Debugf("The server will be accessed using the gateway '%s' as a SSH relay", gateway)
}
}
var server *api.ScalewayServer
if args.Wait {
// --wait
logrus.Debugf("Waiting for server to be ready")
server, err = api.WaitForServerReady(ctx.API, serverID, gateway)
if err != nil {
return fmt.Errorf("Failed to wait for server to be ready, %v", err)
}
} else {
// no --wait
logrus.Debugf("scw won't wait for the server to be ready, if it is not, the command will fail")
server, err = ctx.API.GetServer(serverID)
if err != nil {
rerr := fmt.Errorf("Failed to get server information for %s: %v", serverID, err)
if err.Error() == `"`+serverID+`" not found` {
return fmt.Errorf("%v\nmaybe try to flush the cache with : scw _flush-cache", rerr)
}
return rerr
}
}
if server.PublicAddress.IP == "" && gateway == "" {
logrus.Warn(`Your host has no public IP address, you should use '--gateway', see 'scw help exec'`)
}
// --timeout
if args.Timeout > 0 {
logrus.Debugf("Setting up a global timeout of %d seconds", args.Timeout)
// FIXME: avoid use of log.Fatalf here
go func() {
time.Sleep(time.Duration(args.Timeout*1000) * time.Millisecond)
logrus.Fatalf("Operation timed out")
}()
}
<-done
if len(fingerprints) > 0 {
for i := range fingerprints {
fmt.Fprintf(ctx.Stdout, "%s\n", fingerprints[i])
}
}
logrus.Debugf("PublicDNS %s", serverID+api.URLPublicDNS)
logrus.Debugf("PrivateDNS %s", serverID+api.URLPrivateDNS)
if err = utils.SSHExec(server.PublicAddress.IP, server.PrivateIP, args.SSHUser, args.SSHPort, args.Command, !args.Wait, gateway); err != nil {
return fmt.Errorf("Failed to run the command: %v", err)
}
logrus.Debugf("Command successfully executed")
return nil
}
// Run is the handler for 'scw run'
func Run(ctx CommandContext, args RunArgs) error {
if args.Gateway == "" {
args.Gateway = ctx.Getenv("SCW_GATEWAY")
}
if args.TmpSSHKey {
err := AddSSHKeyToTags(ctx, &args.Tags, args.Image)
if err != nil {
return err
}
}
env := strings.Join(args.Tags, " ")
volume := strings.Join(args.Volumes, " ")
// create IMAGE
logrus.Info("Server creation ...")
dynamicIPRequired := args.Gateway == ""
serverID, err := api.CreateServer(ctx.API, args.Image, args.Name, args.Bootscript, env, volume, dynamicIPRequired)
if err != nil {
return fmt.Errorf("failed to create server: %v", err)
}
logrus.Infof("Server created: %s", serverID)
if args.AutoRemove {
defer ctx.API.DeleteServerSafe(serverID)
}
// start SERVER
logrus.Info("Server start requested ...")
err = api.StartServer(ctx.API, serverID, false)
if err != nil {
return fmt.Errorf("failed to start server %s: %v", serverID, err)
}
logrus.Info("Server is starting, this may take up to a minute ...")
if args.Detach {
fmt.Fprintln(ctx.Stdout, serverID)
return nil
} else {
// Sync cache on disk
ctx.API.Sync()
}
if args.Attach {
// Attach to server serial
logrus.Info("Attaching to server console ...")
err = utils.AttachToSerial(serverID, ctx.API.Token, true)
if err != nil {
return fmt.Errorf("cannot attach to server serial: %v", err)
}
} else {
// Resolve gateway
gateway, err := api.ResolveGateway(ctx.API, args.Gateway)
if err != nil {
return fmt.Errorf("cannot resolve Gateway '%s': %v", args.Gateway, err)
}
// waiting for server to be ready
logrus.Debug("Waiting for server to be ready")
// We wait for 30 seconds, which is the minimal amount of time needed by a server to boot
server, err := api.WaitForServerReady(ctx.API, serverID, gateway)
if err != nil {
return fmt.Errorf("cannot get access to server %s: %v", serverID, err)
}
logrus.Debugf("SSH server is available: %s:22", server.PublicAddress.IP)
logrus.Info("Server is ready !")
// exec -w SERVER COMMAND ARGS...
if len(args.Command) < 1 {
logrus.Info("Connecting to server ...")
err = utils.SSHExec(server.PublicAddress.IP, server.PrivateIP, []string{}, false, gateway)
} else {
logrus.Infof("Executing command: %s ...", args.Command)
err = utils.SSHExec(server.PublicAddress.IP, server.PrivateIP, args.Command, false, gateway)
}
if err != nil {
return fmt.Errorf("command execution failed: %v", err)
}
logrus.Info("Command successfuly executed")
}
return nil
}