func exportVolume(ctx *cobra.Command, args []string) {
if len(args) < 1 {
ErrorExit(ctx, "Needs an argument <ID|CONTAINER-NAME:PATH> to export")
}
volumes, err := getVolumes(ctx)
if err != nil {
log.Fatal(err)
}
volume := volumes.Find(args[0])
if volume == nil {
log.Fatalf("No such volume: %s", args[0])
}
var (
config api.Config
hostConfig api.HostConfig
)
config.Image = "busybox:latest"
hostConfig.Binds = []string{volume.Path + ":/" + volume.ID}
docker, err := client.NewDockerClient(configPath, hostName, ctx.Out())
if err != nil {
log.Fatal(err)
}
var cid string
cid, err = docker.CreateContainer("", config, hostConfig)
if err != nil {
if apiErr, ok := err.(api.Error); ok && (apiErr.StatusCode == 404) {
if err := pullImageInSilence(ctx, config.Image); err != nil {
log.Fatal(err)
}
cid, err = docker.CreateContainer("", config, hostConfig)
if err != nil {
log.Fatal(err)
}
} else {
log.Fatal(err)
}
}
defer docker.RemoveContainer(cid, true)
if err := docker.CopyContainer(cid, "/"+volume.ID); err != nil {
log.Fatal(err)
}
}
func removeVolume(ctx *cobra.Command, volume *Volume) error {
var (
config api.Config
hostConfig api.HostConfig
)
config.Cmd = []string{"/bin/sh", "-c", "rm -rf /.docker_volume_config/" + volume.ID}
config.Image = "busybox:latest"
hostConfig.Binds = []string{filepath.Dir(volume.configPath) + ":/.docker_volume_config"}
if !volume.IsBindMount {
config.Cmd[2] = config.Cmd[2] + (" && rm -rf /.docker_volume/" + volume.ID)
hostConfig.Binds = append(hostConfig.Binds, filepath.Dir(volume.Path)+":/.docker_volume")
}
docker, err := client.NewDockerClient(configPath, hostName, ctx.Out())
if err != nil {
return err
}
var cid string
cid, err = docker.CreateContainer("", config, hostConfig)
if err != nil {
if apiErr, ok := err.(api.Error); ok && (apiErr.StatusCode == 404) {
if err := pullImageInSilence(ctx, config.Image); err != nil {
return err
}
cid, err = docker.CreateContainer("", config, hostConfig)
if err != nil {
return err
}
} else {
return err
}
}
defer docker.RemoveContainer(cid, true)
if err := docker.StartContainer(cid); err != nil {
return err
}
if _, err := docker.WaitContainer(cid); err != nil {
return err
}
return nil
}
func composeContainer(ctx *cobra.Command, root string, composer Composer) (string, error) {
var (
config api.Config
hostConfig api.HostConfig
localVolumes = make(map[string]struct{})
bindVolumes []string
exposedPorts = make(map[string]struct{})
portBindings = make(map[string][]api.PortBinding)
links []string
deviceMappings []api.DeviceMapping
)
if composer.Image != "" {
r, n, t, err := client.ParseRepositoryName(composer.Image)
if err != nil {
return "", err
}
composer.Image = n + ":" + t
if r != "" {
composer.Image = r + "/" + composer.Image
}
}
if (composer.WorkingDir != "") && !filepath.IsAbs(composer.WorkingDir) {
return "", fmt.Errorf("Invalid working directory: it must be absolute.")
}
docker, err := client.NewDockerClient(configPath, hostName, ctx.Out())
if err != nil {
return "", err
}
if composer.Build != "" {
if !filepath.IsAbs(composer.Build) {
composer.Build = filepath.Join(root, composer.Build)
}
message, err := docker.BuildImage(composer.Build, composer.Image, false)
if err != nil {
return "", err
}
if composer.Image == "" {
if _, err := fmt.Sscanf(message, "Successfully built %s", &composer.Image); err != nil {
return "", err
}
}
}
for _, port := range composer.Ports {
var (
rawPort = port
hostIp = ""
hostPort = ""
containerPort = ""
proto = "tcp"
)
if i := strings.LastIndex(port, "/"); i != -1 {
proto = strings.ToLower(port[i+1:])
port = port[:i]
}
parts := strings.Split(port, ":")
switch len(parts) {
case 1:
containerPort = parts[0]
case 2:
hostPort = parts[0]
containerPort = parts[1]
case 3:
hostIp = parts[0]
hostPort = parts[1]
containerPort = parts[2]
default:
return "", fmt.Errorf("Invalid port specification: %s", rawPort)
}
port := fmt.Sprintf("%s/%s", containerPort, proto)
if _, exists := exposedPorts[port]; !exists {
exposedPorts[port] = struct{}{}
}
portBinding := api.PortBinding{
HostIp: hostIp,
HostPort: hostPort,
}
bslice, exists := portBindings[port]
if !exists {
bslice = []api.PortBinding{}
}
portBindings[port] = append(bslice, portBinding)
}
for _, port := range composer.ExposedPorts {
var (
rawPort = port
containerPort = ""
proto = "tcp"
)
parts := strings.Split(containerPort, "/")
switch len(parts) {
case 1:
containerPort = parts[0]
case 2:
containerPort = parts[0]
proto = strings.ToLower(parts[1])
default:
return "", fmt.Errorf("Invalid port specification: %s", rawPort)
}
port := fmt.Sprintf("%s/%s", containerPort, proto)
if _, exists := exposedPorts[port]; !exists {
exposedPorts[port] = struct{}{}
}
}
for _, volume := range composer.Volumes {
if arr := strings.Split(volume, ":"); len(arr) > 1 {
if arr[1] == "/" {
return "", fmt.Errorf("Invalid bind mount: destination can't be '/'")
}
if !filepath.IsAbs(arr[0]) {
return "", fmt.Errorf("Invalid bind mount: the host path must be absolute.")
}
bindVolumes = append(bindVolumes, volume)
} else if volume == "/" {
return "", fmt.Errorf("Invalid volume: path can't be '/'")
} else {
localVolumes[volume] = struct{}{}
}
}
for _, link := range append(composer.Links, composer.ExternalLinks...) {
arr := strings.Split(link, ":")
if len(arr) < 2 {
links = append(links, arr[0]+":"+arr[0])
} else {
links = append(links, link)
}
}
for _, device := range composer.Devices {
src := ""
dst := ""
permissions := "rwm"
arr := strings.Split(device, ":")
switch len(arr) {
case 3:
permissions = arr[2]
fallthrough
case 2:
dst = arr[1]
fallthrough
case 1:
src = arr[0]
default:
return "", fmt.Errorf("Invalid device specification: %s", device)
}
if dst == "" {
dst = src
}
deviceMapping := api.DeviceMapping{
PathOnHost: src,
PathInContainer: dst,
CgroupPermissions: permissions,
}
deviceMappings = append(deviceMappings, deviceMapping)
}
parts := strings.Split(composer.RestartPolicy, ":")
restartPolicy := api.RestartPolicy{}
restartPolicy.Name = parts[0]
if (restartPolicy.Name == "on-failure") && (len(parts) == 2) {
count, err := strconv.Atoi(parts[1])
if err != nil {
return "", err
}
restartPolicy.MaximumRetryCount = count
}
config.Hostname = composer.Hostname
config.Domainname = composer.Domainname
config.User = composer.User
config.Memory = composer.Memory
config.MemorySwap = composer.MemorySwap
config.CpuShares = composer.CpuShares
config.Cpuset = composer.Cpuset
config.ExposedPorts = exposedPorts
config.Tty = composer.Tty
config.OpenStdin = composer.OpenStdin
config.Env = composer.Env
config.Cmd = composer.Cmd
config.Image = composer.Image
config.Volumes = localVolumes
config.WorkingDir = composer.WorkingDir
if composer.Entrypoint != "" {
config.Entrypoint = []string{composer.Entrypoint}
}
config.MacAddress = composer.MacAddress
hostConfig.Binds = bindVolumes
hostConfig.Privileged = composer.Privileged
hostConfig.PortBindings = portBindings
hostConfig.Links = links
hostConfig.PublishAllPorts = composer.PublishAllPorts
hostConfig.Dns = composer.Dns
hostConfig.DnsSearch = composer.DnsSearch
hostConfig.ExtraHosts = composer.ExtraHosts
hostConfig.VolumesFrom = composer.VolumesFrom
hostConfig.Devices = deviceMappings
hostConfig.NetworkMode = composer.NetworkMode
hostConfig.IpcMode = composer.IpcMode
hostConfig.PidMode = composer.PidMode
hostConfig.CapAdd = composer.CapAdd
hostConfig.CapDrop = composer.CapDrop
hostConfig.RestartPolicy = restartPolicy
hostConfig.SecurityOpt = composer.SecurityOpt
hostConfig.ReadonlyRootfs = composer.ReadonlyRootfs
var cid string
cid, err = docker.CreateContainer(composer.Name, config, hostConfig)
if err != nil {
if apiErr, ok := err.(api.Error); ok && (apiErr.StatusCode == 404) {
if _, err := docker.PullImage(config.Image); err != nil {
return "", err
}
cid, err = docker.CreateContainer(composer.Name, config, hostConfig)
if err != nil {
return "", err
}
} else {
return "", err
}
}
return cid, nil
}
func getVolumes(ctx *cobra.Command) (Volumes, error) {
docker, err := client.NewDockerClient(configPath, hostName, ctx.Out())
if err != nil {
return nil, err
}
info, err := docker.Info()
if err != nil {
return nil, err
}
rootDir := "/var/lib/docker"
if info.DockerRootDir != "" {
rootDir = info.DockerRootDir
} else {
for _, pair := range info.DriverStatus {
if pair[0] == "Root Dir" {
rootDir = filepath.Dir(pair[1])
}
}
}
path := filepath.Join(rootDir, "/volumes")
var (
config api.Config
hostConfig api.HostConfig
)
config.Cmd = []string{"/bin/sh", "-c", "awk '{cmd=\"ls -e \" FILENAME; cmd | getline line; close(cmd); split(line,a,\" \"); print $0,a[6],a[7],a[8],a[9],a[10]}' /.docker_volumes/*/config.json"}
config.Image = "busybox:latest"
hostConfig.Binds = []string{path + ":/.docker_volumes:ro"}
var cid string
cid, err = docker.CreateContainer("", config, hostConfig)
if err != nil {
if apiErr, ok := err.(api.Error); ok && (apiErr.StatusCode == 404) {
if err := pullImageInSilence(ctx, config.Image); err != nil {
return nil, err
}
cid, err = docker.CreateContainer("", config, hostConfig)
if err != nil {
return nil, err
}
} else {
return nil, err
}
}
defer docker.RemoveContainer(cid, true)
if err := docker.StartContainer(cid); err != nil {
return nil, err
}
if _, err := docker.WaitContainer(cid); err != nil {
return nil, err
}
logs, err := docker.GetContainerLogs(cid, false, true, true, false, 0)
if err != nil {
return nil, err
}
if logs[0] == "" {
return nil, nil
}
vols := strings.Split(strings.TrimSpace(logs[0]), "\n")
var volumes Volumes
for _, vol := range vols {
arr := strings.SplitN(vol, "} ", 2)
volume := &Volume{}
if err := json.Unmarshal([]byte(arr[0]+"}"), volume); err != nil {
log.Debugf("%s: '%s'", err, arr[0])
return nil, err
}
volume.Created, _ = time.Parse(time.ANSIC, arr[1])
volume.configPath = filepath.Join(path, "/"+volume.ID)
volumes = append(volumes, volume)
}
if err := docker.RemoveContainer(cid, true); err != nil {
return nil, err
}
mounts, err := getMounts(ctx)
if err != nil {
return nil, err
}
for _, volume := range volumes {
for _, mount := range mounts {
if mount.hostPath == volume.Path {
volume.MountedOn = append(volume.MountedOn, mount)
}
}
}
return volumes, nil
}