// 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
}
// 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
}
