mirror of https://github.com/docker/docs.git
Add clean if start fail
This commit is contained in:
Victor Vieux
parent
2b92aa71f9
commit
664acd2971
484
container.go
484
container.go
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@ -567,262 +567,270 @@ func (container *Container) Start(hostConfig *HostConfig) error {
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container.State.Lock()
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container.State.Lock()
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defer container.State.Unlock()
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defer container.State.Unlock()
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if hostConfig == nil { // in docker start of docker restart we want to reuse previous HostConfigFile
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startFct := func(hostConfig *HostConfig) error {
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hostConfig, _ = container.ReadHostConfig()
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}
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if container.State.Running {
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if hostConfig == nil { // in docker start of docker restart we want to reuse previous HostConfigFile
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return fmt.Errorf("The container %s is already running.", container.ID)
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hostConfig, _ = container.ReadHostConfig()
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}
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}
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if err := container.EnsureMounted(); err != nil {
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return err
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if container.State.Running {
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}
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return fmt.Errorf("The container %s is already running.", container.ID)
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if container.runtime.networkManager.disabled {
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}
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container.Config.NetworkDisabled = true
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if err := container.EnsureMounted(); err != nil {
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} else {
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if err := container.allocateNetwork(); err != nil {
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return err
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return err
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}
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}
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}
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if container.runtime.networkManager.disabled {
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container.Config.NetworkDisabled = true
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// Make sure the config is compatible with the current kernel
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if container.Config.Memory > 0 && !container.runtime.capabilities.MemoryLimit {
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log.Printf("WARNING: Your kernel does not support memory limit capabilities. Limitation discarded.\n")
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container.Config.Memory = 0
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}
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if container.Config.Memory > 0 && !container.runtime.capabilities.SwapLimit {
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log.Printf("WARNING: Your kernel does not support swap limit capabilities. Limitation discarded.\n")
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container.Config.MemorySwap = -1
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}
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if container.runtime.capabilities.IPv4ForwardingDisabled {
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log.Printf("WARNING: IPv4 forwarding is disabled. Networking will not work")
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}
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// Create the requested bind mounts
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binds := make(map[string]BindMap)
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// Define illegal container destinations
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illegalDsts := []string{"/", "."}
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for _, bind := range hostConfig.Binds {
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// FIXME: factorize bind parsing in parseBind
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var src, dst, mode string
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arr := strings.Split(bind, ":")
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if len(arr) == 2 {
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src = arr[0]
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dst = arr[1]
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mode = "rw"
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} else if len(arr) == 3 {
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src = arr[0]
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dst = arr[1]
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mode = arr[2]
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} else {
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} else {
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return fmt.Errorf("Invalid bind specification: %s", bind)
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if err := container.allocateNetwork(); err != nil {
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}
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return err
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// Bail if trying to mount to an illegal destination
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for _, illegal := range illegalDsts {
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if dst == illegal {
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return fmt.Errorf("Illegal bind destination: %s", dst)
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}
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}
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}
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}
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bindMap := BindMap{
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// Make sure the config is compatible with the current kernel
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SrcPath: src,
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if container.Config.Memory > 0 && !container.runtime.capabilities.MemoryLimit {
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DstPath: dst,
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log.Printf("WARNING: Your kernel does not support memory limit capabilities. Limitation discarded.\n")
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Mode: mode,
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container.Config.Memory = 0
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}
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if container.Config.Memory > 0 && !container.runtime.capabilities.SwapLimit {
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log.Printf("WARNING: Your kernel does not support swap limit capabilities. Limitation discarded.\n")
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container.Config.MemorySwap = -1
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}
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}
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binds[path.Clean(dst)] = bindMap
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}
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if container.Volumes == nil || len(container.Volumes) == 0 {
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if container.runtime.capabilities.IPv4ForwardingDisabled {
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container.Volumes = make(map[string]string)
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log.Printf("WARNING: IPv4 forwarding is disabled. Networking will not work")
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container.VolumesRW = make(map[string]bool)
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}
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}
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// Apply volumes from another container if requested
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// Create the requested bind mounts
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if container.Config.VolumesFrom != "" {
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binds := make(map[string]BindMap)
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volumes := strings.Split(container.Config.VolumesFrom, ",")
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// Define illegal container destinations
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for _, v := range volumes {
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illegalDsts := []string{"/", "."}
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c := container.runtime.Get(v)
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if c == nil {
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for _, bind := range hostConfig.Binds {
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return fmt.Errorf("Container %s not found. Impossible to mount its volumes", container.ID)
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// FIXME: factorize bind parsing in parseBind
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var src, dst, mode string
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arr := strings.Split(bind, ":")
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if len(arr) == 2 {
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src = arr[0]
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dst = arr[1]
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mode = "rw"
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} else if len(arr) == 3 {
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src = arr[0]
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dst = arr[1]
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mode = arr[2]
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} else {
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return fmt.Errorf("Invalid bind specification: %s", bind)
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}
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}
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for volPath, id := range c.Volumes {
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if _, exists := container.Volumes[volPath]; exists {
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// Bail if trying to mount to an illegal destination
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continue
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for _, illegal := range illegalDsts {
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}
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if dst == illegal {
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if err := os.MkdirAll(path.Join(container.RootfsPath(), volPath), 0755); err != nil {
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return fmt.Errorf("Illegal bind destination: %s", dst)
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return err
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}
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container.Volumes[volPath] = id
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if isRW, exists := c.VolumesRW[volPath]; exists {
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container.VolumesRW[volPath] = isRW
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}
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}
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}
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}
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}
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bindMap := BindMap{
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}
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SrcPath: src,
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DstPath: dst,
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// Create the requested volumes if they don't exist
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Mode: mode,
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for volPath := range container.Config.Volumes {
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volPath = path.Clean(volPath)
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// Skip existing volumes
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if _, exists := container.Volumes[volPath]; exists {
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continue
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}
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var srcPath string
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var isBindMount bool
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srcRW := false
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// If an external bind is defined for this volume, use that as a source
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if bindMap, exists := binds[volPath]; exists {
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isBindMount = true
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srcPath = bindMap.SrcPath
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if strings.ToLower(bindMap.Mode) == "rw" {
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srcRW = true
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}
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}
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// Otherwise create an directory in $ROOT/volumes/ and use that
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binds[path.Clean(dst)] = bindMap
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} else {
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c, err := container.runtime.volumes.Create(nil, container, "", "", nil)
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if err != nil {
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return err
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}
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srcPath, err = c.layer()
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if err != nil {
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return err
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}
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srcRW = true // RW by default
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}
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container.Volumes[volPath] = srcPath
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container.VolumesRW[volPath] = srcRW
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// Create the mountpoint
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rootVolPath := path.Join(container.RootfsPath(), volPath)
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if err := os.MkdirAll(rootVolPath, 0755); err != nil {
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return nil
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}
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}
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// Do not copy or change permissions if we are mounting from the host
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if container.Volumes == nil || len(container.Volumes) == 0 {
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if srcRW && !isBindMount {
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container.Volumes = make(map[string]string)
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volList, err := ioutil.ReadDir(rootVolPath)
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container.VolumesRW = make(map[string]bool)
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if err != nil {
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}
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return err
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// Apply volumes from another container if requested
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if container.Config.VolumesFrom != "" {
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volumes := strings.Split(container.Config.VolumesFrom, ",")
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for _, v := range volumes {
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c := container.runtime.Get(v)
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if c == nil {
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return fmt.Errorf("Container %s not found. Impossible to mount its volumes", container.ID)
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}
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for volPath, id := range c.Volumes {
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if _, exists := container.Volumes[volPath]; exists {
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continue
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}
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if err := os.MkdirAll(path.Join(container.RootfsPath(), volPath), 0755); err != nil {
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return err
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}
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container.Volumes[volPath] = id
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if isRW, exists := c.VolumesRW[volPath]; exists {
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container.VolumesRW[volPath] = isRW
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}
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}
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}
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}
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if len(volList) > 0 {
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}
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srcList, err := ioutil.ReadDir(srcPath)
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// Create the requested volumes if they don't exist
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for volPath := range container.Config.Volumes {
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volPath = path.Clean(volPath)
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// Skip existing volumes
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if _, exists := container.Volumes[volPath]; exists {
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continue
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}
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var srcPath string
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var isBindMount bool
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srcRW := false
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// If an external bind is defined for this volume, use that as a source
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if bindMap, exists := binds[volPath]; exists {
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isBindMount = true
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srcPath = bindMap.SrcPath
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if strings.ToLower(bindMap.Mode) == "rw" {
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srcRW = true
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}
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// Otherwise create an directory in $ROOT/volumes/ and use that
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} else {
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c, err := container.runtime.volumes.Create(nil, container, "", "", nil)
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if err != nil {
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if err != nil {
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return err
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return err
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}
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}
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if len(srcList) == 0 {
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srcPath, err = c.layer()
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// If the source volume is empty copy files from the root into the volume
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if err != nil {
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if err := CopyWithTar(rootVolPath, srcPath); err != nil {
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return err
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return err
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}
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}
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srcRW = true // RW by default
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}
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container.Volumes[volPath] = srcPath
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container.VolumesRW[volPath] = srcRW
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// Create the mountpoint
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rootVolPath := path.Join(container.RootfsPath(), volPath)
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if err := os.MkdirAll(rootVolPath, 0755); err != nil {
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return nil
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}
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var stat syscall.Stat_t
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// Do not copy or change permissions if we are mounting from the host
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if err := syscall.Stat(rootVolPath, &stat); err != nil {
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if srcRW && !isBindMount {
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volList, err := ioutil.ReadDir(rootVolPath)
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if err != nil {
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return err
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}
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if len(volList) > 0 {
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srcList, err := ioutil.ReadDir(srcPath)
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if err != nil {
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return err
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return err
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}
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}
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var srcStat syscall.Stat_t
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if len(srcList) == 0 {
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if err := syscall.Stat(srcPath, &srcStat); err != nil {
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// If the source volume is empty copy files from the root into the volume
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return err
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if err := CopyWithTar(rootVolPath, srcPath); err != nil {
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}
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// Change the source volume's ownership if it differs from the root
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// files that where just copied
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if stat.Uid != srcStat.Uid || stat.Gid != srcStat.Gid {
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if err := os.Chown(srcPath, int(stat.Uid), int(stat.Gid)); err != nil {
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return err
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return err
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}
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}
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var stat syscall.Stat_t
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if err := syscall.Stat(rootVolPath, &stat); err != nil {
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return err
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}
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var srcStat syscall.Stat_t
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if err := syscall.Stat(srcPath, &srcStat); err != nil {
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return err
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}
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// Change the source volume's ownership if it differs from the root
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// files that where just copied
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if stat.Uid != srcStat.Uid || stat.Gid != srcStat.Gid {
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if err := os.Chown(srcPath, int(stat.Uid), int(stat.Gid)); err != nil {
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return err
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}
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}
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}
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}
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}
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}
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}
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}
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}
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}
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}
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if err := container.generateLXCConfig(hostConfig); err != nil {
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if err := container.generateLXCConfig(hostConfig); err != nil {
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return err
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return err
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}
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params := []string{
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"-n", container.ID,
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"-f", container.lxcConfigPath(),
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"--",
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"/.dockerinit",
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}
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// Networking
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if !container.Config.NetworkDisabled {
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params = append(params, "-g", container.network.Gateway.String())
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}
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// User
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if container.Config.User != "" {
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params = append(params, "-u", container.Config.User)
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}
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if container.Config.Tty {
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params = append(params, "-e", "TERM=xterm")
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}
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// Setup environment
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params = append(params,
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"-e", "HOME=/",
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"-e", "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
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"-e", "container=lxc",
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"-e", "HOSTNAME="+container.Config.Hostname,
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)
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if container.Config.WorkingDir != "" {
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workingDir := path.Clean(container.Config.WorkingDir)
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utils.Debugf("[working dir] working dir is %s", workingDir)
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if err := os.MkdirAll(path.Join(container.RootfsPath(), workingDir), 0755); err != nil {
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return nil
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}
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}
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params := []string{
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"-n", container.ID,
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"-f", container.lxcConfigPath(),
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"--",
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"/.dockerinit",
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}
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// Networking
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if !container.Config.NetworkDisabled {
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params = append(params, "-g", container.network.Gateway.String())
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}
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// User
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if container.Config.User != "" {
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params = append(params, "-u", container.Config.User)
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}
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if container.Config.Tty {
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params = append(params, "-e", "TERM=xterm")
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}
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// Setup environment
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params = append(params,
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params = append(params,
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"-w", workingDir,
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"-e", "HOME=/",
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"-e", "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
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"-e", "container=lxc",
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"-e", "HOSTNAME="+container.Config.Hostname,
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)
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)
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if container.Config.WorkingDir != "" {
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workingDir := path.Clean(container.Config.WorkingDir)
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utils.Debugf("[working dir] working dir is %s", workingDir)
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if err := os.MkdirAll(path.Join(container.RootfsPath(), workingDir), 0755); err != nil {
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return nil
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}
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params = append(params,
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"-w", workingDir,
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)
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}
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for _, elem := range container.Config.Env {
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params = append(params, "-e", elem)
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}
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// Program
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params = append(params, "--", container.Path)
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params = append(params, container.Args...)
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container.cmd = exec.Command("lxc-start", params...)
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// Setup logging of stdout and stderr to disk
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if err := container.runtime.LogToDisk(container.stdout, container.logPath("json"), "stdout"); err != nil {
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return err
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}
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if err := container.runtime.LogToDisk(container.stderr, container.logPath("json"), "stderr"); err != nil {
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return err
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}
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||||||
|
container.cmd.SysProcAttr = &syscall.SysProcAttr{Setsid: true}
|
||||||
|
|
||||||
|
var err error
|
||||||
|
if container.Config.Tty {
|
||||||
|
err = container.startPty()
|
||||||
|
} else {
|
||||||
|
err = container.start()
|
||||||
|
}
|
||||||
|
if err != nil {
|
||||||
|
return err
|
||||||
|
}
|
||||||
|
// FIXME: save state on disk *first*, then converge
|
||||||
|
// this way disk state is used as a journal, eg. we can restore after crash etc.
|
||||||
|
container.State.setRunning(container.cmd.Process.Pid)
|
||||||
|
|
||||||
|
// Init the lock
|
||||||
|
container.waitLock = make(chan struct{})
|
||||||
|
|
||||||
|
container.ToDisk()
|
||||||
|
container.SaveHostConfig(hostConfig)
|
||||||
|
go container.monitor(hostConfig)
|
||||||
|
return nil
|
||||||
}
|
}
|
||||||
|
err := startFct(hostConfig)
|
||||||
for _, elem := range container.Config.Env {
|
|
||||||
params = append(params, "-e", elem)
|
|
||||||
}
|
|
||||||
|
|
||||||
// Program
|
|
||||||
params = append(params, "--", container.Path)
|
|
||||||
params = append(params, container.Args...)
|
|
||||||
|
|
||||||
container.cmd = exec.Command("lxc-start", params...)
|
|
||||||
|
|
||||||
// Setup logging of stdout and stderr to disk
|
|
||||||
if err := container.runtime.LogToDisk(container.stdout, container.logPath("json"), "stdout"); err != nil {
|
|
||||||
return err
|
|
||||||
}
|
|
||||||
if err := container.runtime.LogToDisk(container.stderr, container.logPath("json"), "stderr"); err != nil {
|
|
||||||
return err
|
|
||||||
}
|
|
||||||
|
|
||||||
container.cmd.SysProcAttr = &syscall.SysProcAttr{Setsid: true}
|
|
||||||
|
|
||||||
var err error
|
|
||||||
if container.Config.Tty {
|
|
||||||
err = container.startPty()
|
|
||||||
} else {
|
|
||||||
err = container.start()
|
|
||||||
}
|
|
||||||
if err != nil {
|
if err != nil {
|
||||||
return err
|
container.cleanup()
|
||||||
}
|
}
|
||||||
// FIXME: save state on disk *first*, then converge
|
return err
|
||||||
// this way disk state is used as a journal, eg. we can restore after crash etc.
|
|
||||||
container.State.setRunning(container.cmd.Process.Pid)
|
|
||||||
|
|
||||||
// Init the lock
|
|
||||||
container.waitLock = make(chan struct{})
|
|
||||||
|
|
||||||
container.ToDisk()
|
|
||||||
container.SaveHostConfig(hostConfig)
|
|
||||||
go container.monitor(hostConfig)
|
|
||||||
return nil
|
|
||||||
}
|
}
|
||||||
|
|
||||||
func (container *Container) Run() error {
|
func (container *Container) Run() error {
|
||||||
|
|
@ -981,6 +989,28 @@ func (container *Container) monitor(hostConfig *HostConfig) {
|
||||||
}
|
}
|
||||||
|
|
||||||
// Cleanup
|
// Cleanup
|
||||||
|
container.cleanup()
|
||||||
|
|
||||||
|
// Re-create a brand new stdin pipe once the container exited
|
||||||
|
if container.Config.OpenStdin {
|
||||||
|
container.stdin, container.stdinPipe = io.Pipe()
|
||||||
|
}
|
||||||
|
|
||||||
|
// Release the lock
|
||||||
|
close(container.waitLock)
|
||||||
|
|
||||||
|
if err := container.ToDisk(); err != nil {
|
||||||
|
// FIXME: there is a race condition here which causes this to fail during the unit tests.
|
||||||
|
// If another goroutine was waiting for Wait() to return before removing the container's root
|
||||||
|
// from the filesystem... At this point it may already have done so.
|
||||||
|
// This is because State.setStopped() has already been called, and has caused Wait()
|
||||||
|
// to return.
|
||||||
|
// FIXME: why are we serializing running state to disk in the first place?
|
||||||
|
//log.Printf("%s: Failed to dump configuration to the disk: %s", container.ID, err)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
func (container *Container) cleanup() {
|
||||||
container.releaseNetwork()
|
container.releaseNetwork()
|
||||||
if container.Config.OpenStdin {
|
if container.Config.OpenStdin {
|
||||||
if err := container.stdin.Close(); err != nil {
|
if err := container.stdin.Close(); err != nil {
|
||||||
|
|
@ -1003,24 +1033,6 @@ func (container *Container) monitor(hostConfig *HostConfig) {
|
||||||
if err := container.Unmount(); err != nil {
|
if err := container.Unmount(); err != nil {
|
||||||
log.Printf("%v: Failed to umount filesystem: %v", container.ID, err)
|
log.Printf("%v: Failed to umount filesystem: %v", container.ID, err)
|
||||||
}
|
}
|
||||||
|
|
||||||
// Re-create a brand new stdin pipe once the container exited
|
|
||||||
if container.Config.OpenStdin {
|
|
||||||
container.stdin, container.stdinPipe = io.Pipe()
|
|
||||||
}
|
|
||||||
|
|
||||||
// Release the lock
|
|
||||||
close(container.waitLock)
|
|
||||||
|
|
||||||
if err := container.ToDisk(); err != nil {
|
|
||||||
// FIXME: there is a race condition here which causes this to fail during the unit tests.
|
|
||||||
// If another goroutine was waiting for Wait() to return before removing the container's root
|
|
||||||
// from the filesystem... At this point it may already have done so.
|
|
||||||
// This is because State.setStopped() has already been called, and has caused Wait()
|
|
||||||
// to return.
|
|
||||||
// FIXME: why are we serializing running state to disk in the first place?
|
|
||||||
//log.Printf("%s: Failed to dump configuration to the disk: %s", container.ID, err)
|
|
||||||
}
|
|
||||||
}
|
}
|
||||||
|
|
||||||
func (container *Container) kill() error {
|
func (container *Container) kill() error {
|
||||||
|
|
|
||||||
Loading…
Reference in New Issue