package container
import (
"bytes"
"encoding/json"
"fmt"
"io"
"net"
"os"
"path/filepath"
"runtime"
"strconv"
"strings"
"sync"
"syscall"
"time"
"github.com/containerd/containerd/cio"
containertypes "github.com/docker/docker/api/types/container"
mounttypes "github.com/docker/docker/api/types/mount"
networktypes "github.com/docker/docker/api/types/network"
swarmtypes "github.com/docker/docker/api/types/swarm"
"github.com/docker/docker/container/stream"
"github.com/docker/docker/daemon/exec"
"github.com/docker/docker/daemon/logger"
"github.com/docker/docker/daemon/logger/jsonfilelog"
"github.com/docker/docker/daemon/network"
"github.com/docker/docker/image"
"github.com/docker/docker/layer"
"github.com/docker/docker/opts"
"github.com/docker/docker/pkg/containerfs"
"github.com/docker/docker/pkg/idtools"
"github.com/docker/docker/pkg/ioutils"
"github.com/docker/docker/pkg/signal"
"github.com/docker/docker/pkg/symlink"
"github.com/docker/docker/pkg/system"
"github.com/docker/docker/restartmanager"
"github.com/docker/docker/runconfig"
"github.com/docker/docker/volume"
"github.com/docker/go-connections/nat"
"github.com/docker/go-units"
"github.com/docker/libnetwork"
"github.com/docker/libnetwork/netlabel"
"github.com/docker/libnetwork/options"
"github.com/docker/libnetwork/types"
agentexec "github.com/docker/swarmkit/agent/exec"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"golang.org/x/net/context"
)
const configFileName = "config.v2.json"
var (
errInvalidEndpoint = errors.New("invalid endpoint while building port map info")
errInvalidNetwork = errors.New("invalid network settings while building port map info")
)
// ExitStatus provides exit reasons for a container.
type ExitStatus struct {
// The exit code with which the container exited.
ExitCode int
// Whether the container encountered an OOM.
OOMKilled bool
// Time at which the container died
ExitedAt time.Time
}
// Container holds the structure defining a container object.
type Container struct {
StreamConfig *stream.Config
// embed for Container to support states directly.
*State `json:"State"` // Needed for Engine API version <= 1.11
Root string `json:"-"` // Path to the "home" of the container, including metadata.
BaseFS containerfs.ContainerFS `json:"-"` // interface containing graphdriver mount
RWLayer layer.RWLayer `json:"-"`
ID string
Created time.Time
Managed bool
Path string
Args []string
Config *containertypes.Config
ImageID image.ID `json:"Image"`
NetworkSettings *network.Settings
LogPath string
Name string
Driver string
OS string
// MountLabel contains the options for the 'mount' command
MountLabel string
ProcessLabel string
RestartCount int
HasBeenStartedBefore bool
HasBeenManuallyStopped bool // used for unless-stopped restart policy
MountPoints map[string]*volume.MountPoint
HostConfig *containertypes.HostConfig `json:"-"` // do not serialize the host config in the json, otherwise we'll make the container unportable
ExecCommands *exec.Store `json:"-"`
DependencyStore agentexec.DependencyGetter `json:"-"`
SecretReferences []*swarmtypes.SecretReference
ConfigReferences []*swarmtypes.ConfigReference
// logDriver for closing
LogDriver logger.Logger `json:"-"`
LogCopier *logger.Copier `json:"-"`
restartManager restartmanager.RestartManager
attachContext *attachContext
// Fields here are specific to Unix platforms
AppArmorProfile string
HostnamePath string
HostsPath string
ShmPath string
ResolvConfPath string
SeccompProfile string
NoNewPrivileges bool
// Fields here are specific to Windows
NetworkSharedContainerID string `json:"-"`
SharedEndpointList []string `json:"-"`
}
// NewBaseContainer creates a new container with its
// basic configuration.
func NewBaseContainer(id, root string) *Container {
return &Container{
ID: id,
State: NewState(),
ExecCommands: exec.NewStore(),
Root: root,
MountPoints: make(map[string]*volume.MountPoint),
StreamConfig: stream.NewConfig(),
attachContext: &attachContext{},
}
}
// FromDisk loads the container configuration stored in the host.
func (container *Container) FromDisk() error {
pth, err := container.ConfigPath()
if err != nil {
return err
}
jsonSource, err := os.Open(pth)
if err != nil {
return err
}
defer jsonSource.Close()
dec := json.NewDecoder(jsonSource)
// Load container settings
if err := dec.Decode(container); err != nil {
return err
}
// Ensure the operating system is set if blank. Assume it is the OS of the
// host OS if not, to ensure containers created before multiple-OS
// support are migrated
if container.OS == "" {
container.OS = runtime.GOOS
}
return container.readHostConfig()
}
// toDisk saves the container configuration on disk and returns a deep copy.
func (container *Container) toDisk() (*Container, error) {
var (
buf bytes.Buffer
deepCopy Container
)
pth, err := container.ConfigPath()
if err != nil {
return nil, err
}
// Save container settings
f, err := ioutils.NewAtomicFileWriter(pth, 0600)
if err != nil {
return nil, err
}
defer f.Close()
w := io.MultiWriter(&buf, f)
if err := json.NewEncoder(w).Encode(container); err != nil {
return nil, err
}
if err := json.NewDecoder(&buf).Decode(&deepCopy); err != nil {
return nil, err
}
deepCopy.HostConfig, err = container.WriteHostConfig()
if err != nil {
return nil, err
}
return &deepCopy, nil
}
// CheckpointTo makes the Container's current state visible to queries, and persists state.
// Callers must hold a Container lock.
func (container *Container) CheckpointTo(store ViewDB) error {
deepCopy, err := container.toDisk()
if err != nil {
return err
}
return store.Save(deepCopy)
}
// readHostConfig reads the host configuration from disk for the container.
func (container *Container) readHostConfig() error {
container.HostConfig = &containertypes.HostConfig{}
// If the hostconfig file does not exist, do not read it.
// (We still have to initialize container.HostConfig,
// but that's OK, since we just did that above.)
pth, err := container.HostConfigPath()
if err != nil {
return err
}
f, err := os.Open(pth)
if err != nil {
if os.IsNotExist(err) {
return nil
}
return err
}
defer f.Close()
if err := json.NewDecoder(f).Decode(&container.HostConfig); err != nil {
return err
}
container.InitDNSHostConfig()
return nil
}
// WriteHostConfig saves the host configuration on disk for the container,
// and returns a deep copy of the saved object. Callers must hold a Container lock.
func (container *Container) WriteHostConfig() (*containertypes.HostConfig, error) {
var (
buf bytes.Buffer
deepCopy containertypes.HostConfig
)
pth, err := container.HostConfigPath()
if err != nil {
return nil, err
}
f, err := ioutils.NewAtomicFileWriter(pth, 0644)
if err != nil {
return nil, err
}
defer f.Close()
w := io.MultiWriter(&buf, f)
if err := json.NewEncoder(w).Encode(&container.HostConfig); err != nil {
return nil, err
}
if err := json.NewDecoder(&buf).Decode(&deepCopy); err != nil {
return nil, err
}
return &deepCopy, nil
}
// SetupWorkingDirectory sets up the container's working directory as set in container.Config.WorkingDir
func (container *Container) SetupWorkingDirectory(rootIDs idtools.IDPair) error {
// TODO @jhowardmsft, @gupta-ak LCOW Support. This will need revisiting.
// We will need to do remote filesystem operations here.
if container.OS != runtime.GOOS {
return nil
}
if container.Config.WorkingDir == "" {
return nil
}
container.Config.WorkingDir = filepath.Clean(container.Config.WorkingDir)
pth, err := container.GetResourcePath(container.Config.WorkingDir)
if err != nil {
return err
}
if err := idtools.MkdirAllAndChownNew(pth, 0755, rootIDs); err != nil {
pthInfo, err2 := os.Stat(pth)
if err2 == nil && pthInfo != nil && !pthInfo.IsDir() {
return errors.Errorf("Cannot mkdir: %s is not a directory", container.Config.WorkingDir)
}
return err
}
return nil
}
// GetResourcePath evaluates `path` in the scope of the container's BaseFS, with proper path
// sanitisation. Symlinks are all scoped to the BaseFS of the container, as
// though the container's BaseFS was `/`.
//
// The BaseFS of a container is the host-facing path which is bind-mounted as
// `/` inside the container. This method is essentially used to access a
// particular path inside the container as though you were a process in that
// container.
//
// NOTE: The returned path is *only* safely scoped inside the container's BaseFS
// if no component of the returned path changes (such as a component
// symlinking to a different path) between using this method and using the
// path. See symlink.FollowSymlinkInScope for more details.
func (container *Container) GetResourcePath(path string) (string, error) {
// IMPORTANT - These are paths on the OS where the daemon is running, hence
// any filepath operations must be done in an OS agnostic way.
r, e := container.BaseFS.ResolveScopedPath(path, false)
// Log this here on the daemon side as there's otherwise no indication apart
// from the error being propagated all the way back to the client. This makes
// debugging significantly easier and clearly indicates the error comes from the daemon.
if e != nil {
logrus.Errorf("Failed to ResolveScopedPath BaseFS %s path %s %s\n", container.BaseFS.Path(), path, e)
}
return r, e
}
// GetRootResourcePath evaluates `path` in the scope of the container's root, with proper path
// sanitisation. Symlinks are all scoped to the root of the container, as
// though the container's root was `/`.
//
// The root of a container is the host-facing configuration metadata directory.
// Only use this method to safely access the container's `container.json` or
// other metadata files. If in doubt, use container.GetResourcePath.
//
// NOTE: The returned path is *only* safely scoped inside the container's root
// if no component of the returned path changes (such as a component
// symlinking to a different path) between using this method and using the
// path. See symlink.FollowSymlinkInScope for more details.
func (container *Container) GetRootResourcePath(path string) (string, error) {
// IMPORTANT - These are paths on the OS where the daemon is running, hence
// any filepath operations must be done in an OS agnostic way.
cleanPath := filepath.Join(string(os.PathSeparator), path)
return symlink.FollowSymlinkInScope(filepath.Join(container.Root, cleanPath), container.Root)
}
// ExitOnNext signals to the monitor that it should not restart the container
// after we send the kill signal.
func (container *Container) ExitOnNext() {
container.RestartManager().Cancel()
}
// HostConfigPath returns the path to the container's JSON hostconfig
func (container *Container) HostConfigPath() (string, error) {
return container.GetRootResourcePath("hostconfig.json")
}
// ConfigPath returns the path to the container's JSON config
func (container *Container) ConfigPath() (string, error) {
return container.GetRootResourcePath(configFileName)
}
// CheckpointDir returns the directory checkpoints are stored in
func (container *Container) CheckpointDir() string {
return filepath.Join(container.Root, "checkpoints")
}
// StartLogger starts a new logger driver for the container.
func (container *Container) StartLogger() (logger.Logger, error) {
cfg := container.HostConfig.LogConfig
initDriver, err := logger.GetLogDriver(cfg.Type)
if err != nil {
return nil, errors.Wrap(err, "failed to get logging factory")
}
info := logger.Info{
Config: cfg.Config,
ContainerID: container.ID,
ContainerName: container.Name,
ContainerEntrypoint: container.Path,
ContainerArgs: container.Args,
ContainerImageID: container.ImageID.String(),
ContainerImageName: container.Config.Image,
ContainerCreated: container.Created,
ContainerEnv: container.Config.Env,
ContainerLabels: container.Config.Labels,
DaemonName: "docker",
}
// Set logging file for "json-logger"
if cfg.Type == jsonfilelog.Name {
info.LogPath, err = container.GetRootResourcePath(fmt.Sprintf("%s-json.log", container.ID))
if err != nil {
return nil, err
}
}
l, err := initDriver(info)
if err != nil {
return nil, err
}
if containertypes.LogMode(cfg.Config["mode"]) == containertypes.LogModeNonBlock {
bufferSize := int64(-1)
if s, exists := cfg.Config["max-buffer-size"]; exists {
bufferSize, err = units.RAMInBytes(s)
if err != nil {
return nil, err
}
}
l = logger.NewRingLogger(l, info, bufferSize)
}
return l, nil
}
// GetProcessLabel returns the process label for the container.
func (container *Container) GetProcessLabel() string {
// even if we have a process label return "" if we are running
// in privileged mode
if container.HostConfig.Privileged {
return ""
}
return container.ProcessLabel
}
// GetMountLabel returns the mounting label for the container.
// This label is empty if the container is privileged.
func (container *Container) GetMountLabel() string {
return container.MountLabel
}
// GetExecIDs returns the list of exec commands running on the container.
func (container *Container) GetExecIDs() []string {
return container.ExecCommands.List()
}
// ShouldRestart decides whether the daemon should restart the container or not.
// This is based on the container's restart policy.
func (container *Container) ShouldRestart() bool {
shouldRestart, _, _ := container.RestartManager().ShouldRestart(uint32(container.ExitCode()), container.HasBeenManuallyStopped, container.FinishedAt.Sub(container.StartedAt))
return shouldRestart
}
// AddMountPointWithVolume adds a new mount point configured with a volume to the container.
func (container *Container) AddMountPointWithVolume(destination string, vol volume.Volume, rw bool) {
operatingSystem := container.OS
if operatingSystem == "" {
operatingSystem = runtime.GOOS
}
volumeParser := volume.NewParser(operatingSystem)
container.MountPoints[destination] = &volume.MountPoint{
Type: mounttypes.TypeVolume,
Name: vol.Name(),
Driver: vol.DriverName(),
Destination: destination,
RW: rw,
Volume: vol,
CopyData: volumeParser.DefaultCopyMode(),
}
}
// UnmountVolumes unmounts all volumes
func (container *Container) UnmountVolumes(volumeEventLog func(name, action string, attributes map[string]string)) error {
var errors []string
for _, volumeMount := range container.MountPoints {
if volumeMount.Volume == nil {
continue
}
if err := volumeMount.Cleanup(); err != nil {
errors = append(errors, err.Error())
continue
}
attributes := map[string]string{
"driver": volumeMount.Volume.DriverName(),
"container": container.ID,
}
volumeEventLog(volumeMount.Volume.Name(), "unmount", attributes)
}
if len(errors) > 0 {
return fmt.Errorf("error while unmounting volumes for container %s: %s", container.ID, strings.Join(errors, "; "))
}
return nil
}
// IsDestinationMounted checks whether a path is mounted on the container or not.
func (container *Container) IsDestinationMounted(destination string) bool {
return container.MountPoints[destination] != nil
}
// StopSignal returns the signal used to stop the container.
func (container *Container) StopSignal() int {
var stopSignal syscall.Signal
if container.Config.StopSignal != "" {
stopSignal, _ = signal.ParseSignal(container.Config.StopSignal)
}
if int(stopSignal) == 0 {
stopSignal, _ = signal.ParseSignal(signal.DefaultStopSignal)
}
return int(stopSignal)
}
// StopTimeout returns the timeout (in seconds) used to stop the container.
func (container *Container) StopTimeout() int {
if container.Config.StopTimeout != nil {
return *container.Config.StopTimeout
}
return DefaultStopTimeout
}
// InitDNSHostConfig ensures that the dns fields are never nil.
// New containers don't ever have those fields nil,
// but pre created containers can still have those nil values.
// The non-recommended host configuration in the start api can
// make these fields nil again, this corrects that issue until
// we remove that behavior for good.
// See https://github.com/docker/docker/pull/17779
// for a more detailed explanation on why we don't want that.
func (container *Container) InitDNSHostConfig() {
container.Lock()
defer container.Unlock()
if container.HostConfig.DNS == nil {
container.HostConfig.DNS = make([]string, 0)
}
if container.HostConfig.DNSSearch == nil {
container.HostConfig.DNSSearch = make([]string, 0)
}
if container.HostConfig.DNSOptions == nil {
container.HostConfig.DNSOptions = make([]string, 0)
}
}
// GetEndpointInNetwork returns the container's endpoint to the provided network.
func (container *Container) GetEndpointInNetwork(n libnetwork.Network) (libnetwork.Endpoint, error) {
endpointName := strings.TrimPrefix(container.Name, "/")
return n.EndpointByName(endpointName)
}
func (container *Container) buildPortMapInfo(ep libnetwork.Endpoint) error {
if ep == nil {
return errInvalidEndpoint
}
networkSettings := container.NetworkSettings
if networkSettings == nil {
return errInvalidNetwork
}
if len(networkSettings.Ports) == 0 {
pm, err := getEndpointPortMapInfo(ep)
if err != nil {
return err
}
networkSettings.Ports = pm
}
return nil
}
func getEndpointPortMapInfo(ep libnetwork.Endpoint) (nat.PortMap, error) {
pm := nat.PortMap{}
driverInfo, err := ep.DriverInfo()
if err != nil {
return pm, err
}
if driverInfo == nil {
// It is not an error for epInfo to be nil
return pm, nil
}
if expData, ok := driverInfo[netlabel.ExposedPorts]; ok {
if exposedPorts, ok := expData.([]types.TransportPort); ok {
for _, tp := range exposedPorts {
natPort, err := nat.NewPort(tp.Proto.String(), strconv.Itoa(int(tp.Port)))
if err != nil {
return pm, fmt.Errorf("Error parsing Port value(%v):%v", tp.Port, err)
}
pm[natPort] = nil
}
}
}
mapData, ok := driverInfo[netlabel.PortMap]
if !ok {
return pm, nil
}
if portMapping, ok := mapData.([]types.PortBinding); ok {
for _, pp := range portMapping {
natPort, err := nat.NewPort(pp.Proto.String(), strconv.Itoa(int(pp.Port)))
if err != nil {
return pm, err
}
natBndg := nat.PortBinding{HostIP: pp.HostIP.String(), HostPort: strconv.Itoa(int(pp.HostPort))}
pm[natPort] = append(pm[natPort], natBndg)
}
}
return pm, nil
}
// GetSandboxPortMapInfo retrieves the current port-mapping programmed for the given sandbox
func GetSandboxPortMapInfo(sb libnetwork.Sandbox) nat.PortMap {
pm := nat.PortMap{}
if sb == nil {
return pm
}
for _, ep := range sb.Endpoints() {
pm, _ = getEndpointPortMapInfo(ep)
if len(pm) > 0 {
break
}
}
return pm
}
// BuildEndpointInfo sets endpoint-related fields on container.NetworkSettings based on the provided network and endpoint.
func (container *Container) BuildEndpointInfo(n libnetwork.Network, ep libnetwork.Endpoint) error {
if ep == nil {
return errInvalidEndpoint
}
networkSettings := container.NetworkSettings
if networkSettings == nil {
return errInvalidNetwork
}
epInfo := ep.Info()
if epInfo == nil {
// It is not an error to get an empty endpoint info
return nil
}
if _, ok := networkSettings.Networks[n.Name()]; !ok {
networkSettings.Networks[n.Name()] = &network.EndpointSettings{
EndpointSettings: &networktypes.EndpointSettings{},
}
}
networkSettings.Networks[n.Name()].NetworkID = n.ID()
networkSettings.Networks[n.Name()].EndpointID = ep.ID()
iface := epInfo.Iface()
if iface == nil {
return nil
}
if iface.MacAddress() != nil {
networkSettings.Networks[n.Name()].MacAddress = iface.MacAddress().String()
}
if iface.Address() != nil {
ones, _ := iface.Address().Mask.Size()
networkSettings.Networks[n.Name()].IPAddress = iface.Address().IP.String()
networkSettings.Networks[n.Name()].IPPrefixLen = ones
}
if iface.AddressIPv6() != nil && iface.AddressIPv6().IP.To16() != nil {
onesv6, _ := iface.AddressIPv6().Mask.Size()
networkSettings.Networks[n.Name()].GlobalIPv6Address = iface.AddressIPv6().IP.String()
networkSettings.Networks[n.Name()].GlobalIPv6PrefixLen = onesv6
}
return nil
}
type named interface {
Name() string
}
// UpdateJoinInfo updates network settings when container joins network n with endpoint ep.
func (container *Container) UpdateJoinInfo(n named, ep libnetwork.Endpoint) error {
if err := container.buildPortMapInfo(ep); err != nil {
return err
}
epInfo := ep.Info()
if epInfo == nil {
// It is not an error to get an empty endpoint info
return nil
}
if epInfo.Gateway() != nil {
container.NetworkSettings.Networks[n.Name()].Gateway = epInfo.Gateway().String()
}
if epInfo.GatewayIPv6().To16() != nil {
container.NetworkSettings.Networks[n.Name()].IPv6Gateway = epInfo.GatewayIPv6().String()
}
return nil
}
// UpdateSandboxNetworkSettings updates the sandbox ID and Key.
func (container *Container) UpdateSandboxNetworkSettings(sb libnetwork.Sandbox) error {
container.NetworkSettings.SandboxID = sb.ID()
container.NetworkSettings.SandboxKey = sb.Key()
return nil
}
// BuildJoinOptions builds endpoint Join options from a given network.
func (container *Container) BuildJoinOptions(n named) ([]libnetwork.EndpointOption, error) {
var joinOptions []libnetwork.EndpointOption
if epConfig, ok := container.NetworkSettings.Networks[n.Name()]; ok {
for _, str := range epConfig.Links {
name, alias, err := opts.ParseLink(str)
if err != nil {
return nil, err
}
joinOptions = append(joinOptions, libnetwork.CreateOptionAlias(name, alias))
}
for k, v := range epConfig.DriverOpts {
joinOptions = append(joinOptions, libnetwork.EndpointOptionGeneric(options.Generic{k: v}))
}
}
return joinOptions, nil
}
// BuildCreateEndpointOptions builds endpoint options from a given network.
func (container *Container) BuildCreateEndpointOptions(n libnetwork.Network, epConfig *networktypes.EndpointSettings, sb libnetwork.Sandbox, daemonDNS []string) ([]libnetwork.EndpointOption, error) {
var (
bindings = make(nat.PortMap)
pbList []types.PortBinding
exposeList []types.TransportPort
createOptions []libnetwork.EndpointOption
)
defaultNetName := runconfig.DefaultDaemonNetworkMode().NetworkName()
if (!container.EnableServiceDiscoveryOnDefaultNetwork() && n.Name() == defaultNetName) ||
container.NetworkSettings.IsAnonymousEndpoint {
createOptions = append(createOptions, libnetwork.CreateOptionAnonymous())
}
if epConfig != nil {
ipam := epConfig.IPAMConfig
if ipam != nil {
var (
ipList []net.IP
ip, ip6, linkip net.IP
)
for _, ips := range ipam.LinkLocalIPs {
if linkip = net.ParseIP(ips); linkip == nil && ips != "" {
return nil, errors.Errorf("Invalid link-local IP address: %s", ipam.LinkLocalIPs)
}
ipList = append(ipList, linkip)
}
if ip = net.ParseIP(ipam.IPv4Address); ip == nil && ipam.IPv4Address != "" {
return nil, errors.Errorf("Invalid IPv4 address: %s)", ipam.IPv4Address)
}
if ip6 = net.ParseIP(ipam.IPv6Address); ip6 == nil && ipam.IPv6Address != "" {
return nil, errors.Errorf("Invalid IPv6 address: %s)", ipam.IPv6Address)
}
createOptions = append(createOptions,
libnetwork.CreateOptionIpam(ip, ip6, ipList, nil))
}
for _, alias := range epConfig.Aliases {
createOptions = append(createOptions, libnetwork.CreateOptionMyAlias(alias))
}
for k, v := range epConfig.DriverOpts {
createOptions = append(createOptions, libnetwork.EndpointOptionGeneric(options.Generic{k: v}))
}
}
if container.NetworkSettings.Service != nil {
svcCfg := container.NetworkSettings.Service
var vip string
if svcCfg.VirtualAddresses[n.ID()] != nil {
vip = svcCfg.VirtualAddresses[n.ID()].IPv4
}
var portConfigs []*libnetwork.PortConfig
for _, portConfig := range svcCfg.ExposedPorts {
portConfigs = append(portConfigs, &libnetwork.PortConfig{
Name: portConfig.Name,
Protocol: libnetwork.PortConfig_Protocol(portConfig.Protocol),
TargetPort: portConfig.TargetPort,
PublishedPort: portConfig.PublishedPort,
})
}
createOptions = append(createOptions, libnetwork.CreateOptionService(svcCfg.Name, svcCfg.ID, net.ParseIP(vip), portConfigs, svcCfg.Aliases[n.ID()]))
}
if !containertypes.NetworkMode(n.Name()).IsUserDefined() {
createOptions = append(createOptions, libnetwork.CreateOptionDisableResolution())
}
// configs that are applicable only for the endpoint in the network
// to which container was connected to on docker run.
// Ideally all these network-specific endpoint configurations must be moved under
// container.NetworkSettings.Networks[n.Name()]
if n.Name() == container.HostConfig.NetworkMode.NetworkName() ||
(n.Name() == defaultNetName && container.HostConfig.NetworkMode.IsDefault()) {
if container.Config.MacAddress != "" {
mac, err := net.ParseMAC(container.Config.MacAddress)
if err != nil {
return nil, err
}
genericOption := options.Generic{
netlabel.MacAddress: mac,
}
createOptions = append(createOptions, libnetwork.EndpointOptionGeneric(genericOption))
}
}
// Port-mapping rules belong to the container & applicable only to non-internal networks
portmaps := GetSandboxPortMapInfo(sb)
if n.Info().Internal() || len(portmaps) > 0 {
return createOptions, nil
}
if container.HostConfig.PortBindings != nil {
for p, b := range container.HostConfig.PortBindings {
bindings[p] = []nat.PortBinding{}
for _, bb := range b {
bindings[p] = append(bindings[p], nat.PortBinding{
HostIP: bb.HostIP,
HostPort: bb.HostPort,
})
}
}
}
portSpecs := container.Config.ExposedPorts
ports := make([]nat.Port, len(portSpecs))
var i int
for p := range portSpecs {
ports[i] = p
i++
}
nat.SortPortMap(ports, bindings)
for _, port := range ports {
expose := types.TransportPort{}
expose.Proto = types.ParseProtocol(port.Proto())
expose.Port = uint16(port.Int())
exposeList = append(exposeList, expose)
pb := types.PortBinding{Port: expose.Port, Proto: expose.Proto}
binding := bindings[port]
for i := 0; i < len(binding); i++ {
pbCopy := pb.GetCopy()
newP, err := nat.NewPort(nat.SplitProtoPort(binding[i].HostPort))
var portStart, portEnd int
if err == nil {
portStart, portEnd, err = newP.Range()
}
if err != nil {
return nil, errors.Wrapf(err, "Error parsing HostPort value (%s)", binding[i].HostPort)
}
pbCopy.HostPort = uint16(portStart)
pbCopy.HostPortEnd = uint16(portEnd)
pbCopy.HostIP = net.ParseIP(binding[i].HostIP)
pbList = append(pbList, pbCopy)
}
if container.HostConfig.PublishAllPorts && len(binding) == 0 {
pbList = append(pbList, pb)
}
}
var dns []string
if len(container.HostConfig.DNS) > 0 {
dns = container.HostConfig.DNS
} else if len(daemonDNS) > 0 {
dns = daemonDNS
}
if len(dns) > 0 {
createOptions = append(createOptions,
libnetwork.CreateOptionDNS(dns))
}
createOptions = append(createOptions,
libnetwork.CreateOptionPortMapping(pbList),
libnetwork.CreateOptionExposedPorts(exposeList))
return createOptions, nil
}
// UpdateMonitor updates monitor configure for running container
func (container *Container) UpdateMonitor(restartPolicy containertypes.RestartPolicy) {
type policySetter interface {
SetPolicy(containertypes.RestartPolicy)
}
if rm, ok := container.RestartManager().(policySetter); ok {
rm.SetPolicy(restartPolicy)
}
}
// FullHostname returns hostname and optional domain appended to it.
func (container *Container) FullHostname() string {
fullHostname := container.Config.Hostname
if container.Config.Domainname != "" {
fullHostname = fmt.Sprintf("%s.%s", fullHostname, container.Config.Domainname)
}
return fullHostname
}
// RestartManager returns the current restartmanager instance connected to container.
func (container *Container) RestartManager() restartmanager.RestartManager {
if container.restartManager == nil {
container.restartManager = restartmanager.New(container.HostConfig.RestartPolicy, container.RestartCount)
}
return container.restartManager
}
// ResetRestartManager initializes new restartmanager based on container config
func (container *Container) ResetRestartManager(resetCount bool) {
if container.restartManager != nil {
container.restartManager.Cancel()
}
if resetCount {
container.RestartCount = 0
}
container.restartManager = nil
}
type attachContext struct {
ctx context.Context
cancel context.CancelFunc
mu sync.Mutex
}
// InitAttachContext initializes or returns existing context for attach calls to
// track container liveness.
func (container *Container) InitAttachContext() context.Context {
container.attachContext.mu.Lock()
defer container.attachContext.mu.Unlock()
if container.attachContext.ctx == nil {
container.attachContext.ctx, container.attachContext.cancel = context.WithCancel(context.Background())
}
return container.attachContext.ctx
}
// CancelAttachContext cancels attach context. All attach calls should detach
// after this call.
func (container *Container) CancelAttachContext() {
container.attachContext.mu.Lock()
if container.attachContext.ctx != nil {
container.attachContext.cancel()
container.attachContext.ctx = nil
}
container.attachContext.mu.Unlock()
}
func (container *Container) startLogging() error {
if container.HostConfig.LogConfig.Type == "none" {
return nil // do not start logging routines
}
l, err := container.StartLogger()
if err != nil {
return fmt.Errorf("failed to initialize logging driver: %v", err)
}
copier := logger.NewCopier(map[string]io.Reader{"stdout": container.StdoutPipe(), "stderr": container.StderrPipe()}, l)
container.LogCopier = copier
copier.Run()
container.LogDriver = l
// set LogPath field only for json-file logdriver
if jl, ok := l.(*jsonfilelog.JSONFileLogger); ok {
container.LogPath = jl.LogPath()
}
return nil
}
// StdinPipe gets the stdin stream of the container
func (container *Container) StdinPipe() io.WriteCloser {
return container.StreamConfig.StdinPipe()
}
// StdoutPipe gets the stdout stream of the container
func (container *Container) StdoutPipe() io.ReadCloser {
return container.StreamConfig.StdoutPipe()
}
// StderrPipe gets the stderr stream of the container
func (container *Container) StderrPipe() io.ReadCloser {
return container.StreamConfig.StderrPipe()
}
// CloseStreams closes the container's stdio streams
func (container *Container) CloseStreams() error {
return container.StreamConfig.CloseStreams()
}
// InitializeStdio is called by libcontainerd to connect the stdio.
func (container *Container) InitializeStdio(iop *cio.DirectIO) (cio.IO, error) {
if err := container.startLogging(); err != nil {
container.Reset(false)
return nil, err
}
container.StreamConfig.CopyToPipe(iop)
if container.StreamConfig.Stdin() == nil && !container.Config.Tty {
if iop.Stdin != nil {
if err := iop.Stdin.Close(); err != nil {
logrus.Warnf("error closing stdin: %+v", err)
}
}
}
return &rio{IO: iop, sc: container.StreamConfig}, nil
}
// MountsResourcePath returns the path where mounts are stored for the given mount
func (container *Container) MountsResourcePath(mount string) (string, error) {
return container.GetRootResourcePath(filepath.Join("mounts", mount))
}
// SecretMountPath returns the path of the secret mount for the container
func (container *Container) SecretMountPath() (string, error) {
return container.MountsResourcePath("secrets")
}
// SecretFilePath returns the path to the location of a secret on the host.
func (container *Container) SecretFilePath(secretRef swarmtypes.SecretReference) (string, error) {
secrets, err := container.SecretMountPath()
if err != nil {
return "", err
}
return filepath.Join(secrets, secretRef.SecretID), nil
}
func getSecretTargetPath(r *swarmtypes.SecretReference) string {
if filepath.IsAbs(r.File.Name) {
return r.File.Name
}
return filepath.Join(containerSecretMountPath, r.File.Name)
}
// ConfigsDirPath returns the path to the directory where configs are stored on
// disk.
func (container *Container) ConfigsDirPath() (string, error) {
return container.GetRootResourcePath("configs")
}
// ConfigFilePath returns the path to the on-disk location of a config.
func (container *Container) ConfigFilePath(configRef swarmtypes.ConfigReference) (string, error) {
configs, err := container.ConfigsDirPath()
if err != nil {
return "", err
}
return filepath.Join(configs, configRef.ConfigID), nil
}
// CreateDaemonEnvironment creates a new environment variable slice for this container.
func (container *Container) CreateDaemonEnvironment(tty bool, linkedEnv []string) []string {
// Setup environment
os := container.OS
if os == "" {
os = runtime.GOOS
}
env := []string{}
if runtime.GOOS != "windows" || (runtime.GOOS == "windows" && os == "linux") {
env = []string{
"PATH=" + system.DefaultPathEnv(os),
"HOSTNAME=" + container.Config.Hostname,
}
if tty {
env = append(env, "TERM=xterm")
}
env = append(env, linkedEnv...)
}
// because the env on the container can override certain default values
// we need to replace the 'env' keys where they match and append anything
// else.
env = ReplaceOrAppendEnvValues(env, container.Config.Env)
return env
}
type rio struct {
cio.IO
sc *stream.Config
}
func (i *rio) Close() error {
i.IO.Close()
return i.sc.CloseStreams()
}
func (i *rio) Wait() {
i.sc.Wait()
i.IO.Wait()
}