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963 lines
27 KiB
Go
963 lines
27 KiB
Go
// +build linux
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package daemon
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import (
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"fmt"
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"io/ioutil"
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"net"
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"os"
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"path"
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"path/filepath"
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"strconv"
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"strings"
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"syscall"
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"time"
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"github.com/Sirupsen/logrus"
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"github.com/docker/docker/daemon/execdriver"
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"github.com/docker/docker/daemon/network"
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"github.com/docker/docker/links"
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"github.com/docker/docker/nat"
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"github.com/docker/docker/pkg/archive"
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"github.com/docker/docker/pkg/directory"
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"github.com/docker/docker/pkg/ioutils"
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"github.com/docker/docker/pkg/stringid"
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"github.com/docker/docker/pkg/ulimit"
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"github.com/docker/docker/runconfig"
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"github.com/docker/docker/utils"
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"github.com/docker/libcontainer/configs"
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"github.com/docker/libcontainer/devices"
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"github.com/docker/libnetwork"
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"github.com/docker/libnetwork/netlabel"
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"github.com/docker/libnetwork/netutils"
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"github.com/docker/libnetwork/options"
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)
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const DefaultPathEnv = "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
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type Container struct {
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CommonContainer
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// Fields below here are platform specific.
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AppArmorProfile string
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// Store rw/ro in a separate structure to preserve reverse-compatibility on-disk.
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// Easier than migrating older container configs :)
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VolumesRW map[string]bool
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AppliedVolumesFrom map[string]struct{}
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activeLinks map[string]*links.Link
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}
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func killProcessDirectly(container *Container) error {
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if _, err := container.WaitStop(10 * time.Second); err != nil {
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// Ensure that we don't kill ourselves
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if pid := container.GetPid(); pid != 0 {
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logrus.Infof("Container %s failed to exit within 10 seconds of kill - trying direct SIGKILL", stringid.TruncateID(container.ID))
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if err := syscall.Kill(pid, 9); err != nil {
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if err != syscall.ESRCH {
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return err
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}
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logrus.Debugf("Cannot kill process (pid=%d) with signal 9: no such process.", pid)
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}
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}
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}
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return nil
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}
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func (container *Container) setupLinkedContainers() ([]string, error) {
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var (
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env []string
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daemon = container.daemon
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)
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children, err := daemon.Children(container.Name)
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if err != nil {
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return nil, err
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}
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if len(children) > 0 {
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container.activeLinks = make(map[string]*links.Link, len(children))
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// If we encounter an error make sure that we rollback any network
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// config and iptables changes
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rollback := func() {
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for _, link := range container.activeLinks {
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link.Disable()
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}
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container.activeLinks = nil
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}
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for linkAlias, child := range children {
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if !child.IsRunning() {
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return nil, fmt.Errorf("Cannot link to a non running container: %s AS %s", child.Name, linkAlias)
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}
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link, err := links.NewLink(
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container.NetworkSettings.IPAddress,
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child.NetworkSettings.IPAddress,
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linkAlias,
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child.Config.Env,
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child.Config.ExposedPorts,
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)
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if err != nil {
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rollback()
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return nil, err
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}
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container.activeLinks[link.Alias()] = link
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if err := link.Enable(); err != nil {
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rollback()
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return nil, err
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}
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for _, envVar := range link.ToEnv() {
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env = append(env, envVar)
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}
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}
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}
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return env, nil
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}
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func (container *Container) createDaemonEnvironment(linkedEnv []string) []string {
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// if a domain name was specified, append it to the hostname (see #7851)
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fullHostname := container.Config.Hostname
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if container.Config.Domainname != "" {
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fullHostname = fmt.Sprintf("%s.%s", fullHostname, container.Config.Domainname)
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}
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// Setup environment
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env := []string{
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"PATH=" + DefaultPathEnv,
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"HOSTNAME=" + fullHostname,
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// Note: we don't set HOME here because it'll get autoset intelligently
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// based on the value of USER inside dockerinit, but only if it isn't
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// set already (ie, that can be overridden by setting HOME via -e or ENV
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// in a Dockerfile).
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}
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if container.Config.Tty {
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env = append(env, "TERM=xterm")
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}
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env = append(env, linkedEnv...)
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// because the env on the container can override certain default values
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// we need to replace the 'env' keys where they match and append anything
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// else.
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env = utils.ReplaceOrAppendEnvValues(env, container.Config.Env)
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return env
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}
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func getDevicesFromPath(deviceMapping runconfig.DeviceMapping) (devs []*configs.Device, err error) {
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device, err := devices.DeviceFromPath(deviceMapping.PathOnHost, deviceMapping.CgroupPermissions)
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// if there was no error, return the device
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if err == nil {
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device.Path = deviceMapping.PathInContainer
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return append(devs, device), nil
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}
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// if the device is not a device node
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// try to see if it's a directory holding many devices
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if err == devices.ErrNotADevice {
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// check if it is a directory
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if src, e := os.Stat(deviceMapping.PathOnHost); e == nil && src.IsDir() {
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// mount the internal devices recursively
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filepath.Walk(deviceMapping.PathOnHost, func(dpath string, f os.FileInfo, e error) error {
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childDevice, e := devices.DeviceFromPath(dpath, deviceMapping.CgroupPermissions)
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if e != nil {
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// ignore the device
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return nil
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}
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// add the device to userSpecified devices
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childDevice.Path = strings.Replace(dpath, deviceMapping.PathOnHost, deviceMapping.PathInContainer, 1)
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devs = append(devs, childDevice)
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return nil
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})
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}
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}
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if len(devs) > 0 {
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return devs, nil
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}
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return devs, fmt.Errorf("error gathering device information while adding custom device %q: %s", deviceMapping.PathOnHost, err)
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}
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func populateCommand(c *Container, env []string) error {
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en := &execdriver.Network{
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NamespacePath: c.NetworkSettings.SandboxKey,
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}
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parts := strings.SplitN(string(c.hostConfig.NetworkMode), ":", 2)
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if parts[0] == "container" {
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nc, err := c.getNetworkedContainer()
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if err != nil {
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return err
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}
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en.ContainerID = nc.ID
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}
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ipc := &execdriver.Ipc{}
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if c.hostConfig.IpcMode.IsContainer() {
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ic, err := c.getIpcContainer()
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if err != nil {
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return err
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}
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ipc.ContainerID = ic.ID
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} else {
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ipc.HostIpc = c.hostConfig.IpcMode.IsHost()
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}
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pid := &execdriver.Pid{}
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pid.HostPid = c.hostConfig.PidMode.IsHost()
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uts := &execdriver.UTS{
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HostUTS: c.hostConfig.UTSMode.IsHost(),
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}
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// Build lists of devices allowed and created within the container.
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var userSpecifiedDevices []*configs.Device
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for _, deviceMapping := range c.hostConfig.Devices {
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devs, err := getDevicesFromPath(deviceMapping)
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if err != nil {
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return err
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}
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userSpecifiedDevices = append(userSpecifiedDevices, devs...)
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}
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allowedDevices := append(configs.DefaultAllowedDevices, userSpecifiedDevices...)
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autoCreatedDevices := append(configs.DefaultAutoCreatedDevices, userSpecifiedDevices...)
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// TODO: this can be removed after lxc-conf is fully deprecated
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lxcConfig, err := mergeLxcConfIntoOptions(c.hostConfig)
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if err != nil {
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return err
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}
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var rlimits []*ulimit.Rlimit
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ulimits := c.hostConfig.Ulimits
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// Merge ulimits with daemon defaults
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ulIdx := make(map[string]*ulimit.Ulimit)
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for _, ul := range ulimits {
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ulIdx[ul.Name] = ul
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}
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for name, ul := range c.daemon.config.Ulimits {
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if _, exists := ulIdx[name]; !exists {
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ulimits = append(ulimits, ul)
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}
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}
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for _, limit := range ulimits {
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rl, err := limit.GetRlimit()
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if err != nil {
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return err
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}
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rlimits = append(rlimits, rl)
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}
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resources := &execdriver.Resources{
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Memory: c.hostConfig.Memory,
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MemorySwap: c.hostConfig.MemorySwap,
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CpuShares: c.hostConfig.CpuShares,
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CpusetCpus: c.hostConfig.CpusetCpus,
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CpusetMems: c.hostConfig.CpusetMems,
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CpuPeriod: c.hostConfig.CpuPeriod,
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CpuQuota: c.hostConfig.CpuQuota,
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BlkioWeight: c.hostConfig.BlkioWeight,
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Rlimits: rlimits,
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OomKillDisable: c.hostConfig.OomKillDisable,
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}
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processConfig := execdriver.ProcessConfig{
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Privileged: c.hostConfig.Privileged,
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Entrypoint: c.Path,
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Arguments: c.Args,
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Tty: c.Config.Tty,
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User: c.Config.User,
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}
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processConfig.SysProcAttr = &syscall.SysProcAttr{Setsid: true}
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processConfig.Env = env
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c.command = &execdriver.Command{
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ID: c.ID,
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Rootfs: c.RootfsPath(),
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ReadonlyRootfs: c.hostConfig.ReadonlyRootfs,
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InitPath: "/.dockerinit",
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WorkingDir: c.Config.WorkingDir,
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Network: en,
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Ipc: ipc,
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Pid: pid,
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UTS: uts,
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Resources: resources,
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AllowedDevices: allowedDevices,
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AutoCreatedDevices: autoCreatedDevices,
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CapAdd: c.hostConfig.CapAdd,
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CapDrop: c.hostConfig.CapDrop,
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ProcessConfig: processConfig,
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ProcessLabel: c.GetProcessLabel(),
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MountLabel: c.GetMountLabel(),
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LxcConfig: lxcConfig,
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AppArmorProfile: c.AppArmorProfile,
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CgroupParent: c.hostConfig.CgroupParent,
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}
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return nil
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}
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// GetSize, return real size, virtual size
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func (container *Container) GetSize() (int64, int64) {
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var (
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sizeRw, sizeRootfs int64
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err error
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driver = container.daemon.driver
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)
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if err := container.Mount(); err != nil {
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logrus.Errorf("Failed to compute size of container rootfs %s: %s", container.ID, err)
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return sizeRw, sizeRootfs
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}
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defer container.Unmount()
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initID := fmt.Sprintf("%s-init", container.ID)
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sizeRw, err = driver.DiffSize(container.ID, initID)
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if err != nil {
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logrus.Errorf("Driver %s couldn't return diff size of container %s: %s", driver, container.ID, err)
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// FIXME: GetSize should return an error. Not changing it now in case
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// there is a side-effect.
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sizeRw = -1
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}
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if _, err = os.Stat(container.basefs); err == nil {
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if sizeRootfs, err = directory.Size(container.basefs); err != nil {
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sizeRootfs = -1
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}
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}
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return sizeRw, sizeRootfs
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}
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func (container *Container) buildHostnameFile() error {
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hostnamePath, err := container.GetRootResourcePath("hostname")
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if err != nil {
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return err
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}
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container.HostnamePath = hostnamePath
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if container.Config.Domainname != "" {
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return ioutil.WriteFile(container.HostnamePath, []byte(fmt.Sprintf("%s.%s\n", container.Config.Hostname, container.Config.Domainname)), 0644)
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}
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return ioutil.WriteFile(container.HostnamePath, []byte(container.Config.Hostname+"\n"), 0644)
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}
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func (container *Container) buildJoinOptions() ([]libnetwork.EndpointOption, error) {
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var (
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joinOptions []libnetwork.EndpointOption
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err error
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dns []string
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dnsSearch []string
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)
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joinOptions = append(joinOptions, libnetwork.JoinOptionHostname(container.Config.Hostname),
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libnetwork.JoinOptionDomainname(container.Config.Domainname))
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if container.hostConfig.NetworkMode.IsHost() {
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joinOptions = append(joinOptions, libnetwork.JoinOptionUseDefaultSandbox())
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}
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container.HostsPath, err = container.GetRootResourcePath("hosts")
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if err != nil {
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return nil, err
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}
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joinOptions = append(joinOptions, libnetwork.JoinOptionHostsPath(container.HostsPath))
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container.ResolvConfPath, err = container.GetRootResourcePath("resolv.conf")
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if err != nil {
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return nil, err
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}
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joinOptions = append(joinOptions, libnetwork.JoinOptionResolvConfPath(container.ResolvConfPath))
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if len(container.hostConfig.Dns) > 0 {
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dns = container.hostConfig.Dns
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} else if len(container.daemon.config.Dns) > 0 {
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dns = container.daemon.config.Dns
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}
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for _, d := range dns {
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joinOptions = append(joinOptions, libnetwork.JoinOptionDNS(d))
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}
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if len(container.hostConfig.DnsSearch) > 0 {
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dnsSearch = container.hostConfig.DnsSearch
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} else if len(container.daemon.config.DnsSearch) > 0 {
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dnsSearch = container.daemon.config.DnsSearch
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}
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for _, ds := range dnsSearch {
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joinOptions = append(joinOptions, libnetwork.JoinOptionDNSSearch(ds))
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}
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if container.NetworkSettings.SecondaryIPAddresses != nil {
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name := container.Config.Hostname
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if container.Config.Domainname != "" {
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name = name + "." + container.Config.Domainname
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}
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for _, a := range container.NetworkSettings.SecondaryIPAddresses {
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joinOptions = append(joinOptions, libnetwork.JoinOptionExtraHost(name, a.Addr))
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}
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}
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var childEndpoints, parentEndpoints []string
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children, err := container.daemon.Children(container.Name)
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if err != nil {
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return nil, err
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}
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for linkAlias, child := range children {
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_, alias := path.Split(linkAlias)
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// allow access to the linked container via the alias, real name, and container hostname
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aliasList := alias + " " + child.Config.Hostname
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// only add the name if alias isn't equal to the name
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if alias != child.Name[1:] {
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aliasList = aliasList + " " + child.Name[1:]
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}
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joinOptions = append(joinOptions, libnetwork.JoinOptionExtraHost(aliasList, child.NetworkSettings.IPAddress))
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if child.NetworkSettings.EndpointID != "" {
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childEndpoints = append(childEndpoints, child.NetworkSettings.EndpointID)
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}
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}
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for _, extraHost := range container.hostConfig.ExtraHosts {
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// allow IPv6 addresses in extra hosts; only split on first ":"
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parts := strings.SplitN(extraHost, ":", 2)
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joinOptions = append(joinOptions, libnetwork.JoinOptionExtraHost(parts[0], parts[1]))
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}
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refs := container.daemon.ContainerGraph().RefPaths(container.ID)
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for _, ref := range refs {
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if ref.ParentID == "0" {
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continue
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}
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c, err := container.daemon.Get(ref.ParentID)
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if err != nil {
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logrus.Error(err)
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}
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if c != nil && !container.daemon.config.DisableNetwork && container.hostConfig.NetworkMode.IsPrivate() {
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logrus.Debugf("Update /etc/hosts of %s for alias %s with ip %s", c.ID, ref.Name, container.NetworkSettings.IPAddress)
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joinOptions = append(joinOptions, libnetwork.JoinOptionParentUpdate(c.NetworkSettings.EndpointID, ref.Name, container.NetworkSettings.IPAddress))
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if c.NetworkSettings.EndpointID != "" {
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parentEndpoints = append(parentEndpoints, c.NetworkSettings.EndpointID)
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}
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}
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}
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linkOptions := options.Generic{
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netlabel.GenericData: options.Generic{
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"ParentEndpoints": parentEndpoints,
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"ChildEndpoints": childEndpoints,
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},
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}
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joinOptions = append(joinOptions, libnetwork.JoinOptionGeneric(linkOptions))
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return joinOptions, nil
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}
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func (container *Container) buildPortMapInfo(n libnetwork.Network, ep libnetwork.Endpoint, networkSettings *network.Settings) (*network.Settings, error) {
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if ep == nil {
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return nil, fmt.Errorf("invalid endpoint while building port map info")
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}
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if networkSettings == nil {
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return nil, fmt.Errorf("invalid networksettings while building port map info")
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}
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driverInfo, err := ep.DriverInfo()
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if err != nil {
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return nil, err
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}
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if driverInfo == nil {
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// It is not an error for epInfo to be nil
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return networkSettings, nil
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}
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if mac, ok := driverInfo[netlabel.MacAddress]; ok {
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networkSettings.MacAddress = mac.(net.HardwareAddr).String()
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}
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mapData, ok := driverInfo[netlabel.PortMap]
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if !ok {
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return networkSettings, nil
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}
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if portMapping, ok := mapData.([]netutils.PortBinding); ok {
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networkSettings.Ports = nat.PortMap{}
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for _, pp := range portMapping {
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natPort := nat.NewPort(pp.Proto.String(), strconv.Itoa(int(pp.Port)))
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natBndg := nat.PortBinding{HostIp: pp.HostIP.String(), HostPort: strconv.Itoa(int(pp.HostPort))}
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networkSettings.Ports[natPort] = append(networkSettings.Ports[natPort], natBndg)
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}
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}
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return networkSettings, nil
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}
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func (container *Container) buildEndpointInfo(n libnetwork.Network, ep libnetwork.Endpoint, networkSettings *network.Settings) (*network.Settings, error) {
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if ep == nil {
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return nil, fmt.Errorf("invalid endpoint while building port map info")
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}
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if networkSettings == nil {
|
|
return nil, fmt.Errorf("invalid networksettings while building port map info")
|
|
}
|
|
|
|
epInfo := ep.Info()
|
|
if epInfo == nil {
|
|
// It is not an error to get an empty endpoint info
|
|
return networkSettings, nil
|
|
}
|
|
|
|
ifaceList := epInfo.InterfaceList()
|
|
if len(ifaceList) == 0 {
|
|
return networkSettings, nil
|
|
}
|
|
|
|
iface := ifaceList[0]
|
|
|
|
ones, _ := iface.Address().Mask.Size()
|
|
networkSettings.IPAddress = iface.Address().IP.String()
|
|
networkSettings.IPPrefixLen = ones
|
|
|
|
if iface.AddressIPv6().IP.To16() != nil {
|
|
onesv6, _ := iface.AddressIPv6().Mask.Size()
|
|
networkSettings.GlobalIPv6Address = iface.AddressIPv6().IP.String()
|
|
networkSettings.GlobalIPv6PrefixLen = onesv6
|
|
}
|
|
|
|
if len(ifaceList) == 1 {
|
|
return networkSettings, nil
|
|
}
|
|
|
|
networkSettings.SecondaryIPAddresses = make([]network.Address, 0, len(ifaceList)-1)
|
|
networkSettings.SecondaryIPv6Addresses = make([]network.Address, 0, len(ifaceList)-1)
|
|
for _, iface := range ifaceList[1:] {
|
|
ones, _ := iface.Address().Mask.Size()
|
|
addr := network.Address{Addr: iface.Address().IP.String(), PrefixLen: ones}
|
|
networkSettings.SecondaryIPAddresses = append(networkSettings.SecondaryIPAddresses, addr)
|
|
|
|
if iface.AddressIPv6().IP.To16() != nil {
|
|
onesv6, _ := iface.AddressIPv6().Mask.Size()
|
|
addrv6 := network.Address{Addr: iface.AddressIPv6().IP.String(), PrefixLen: onesv6}
|
|
networkSettings.SecondaryIPv6Addresses = append(networkSettings.SecondaryIPv6Addresses, addrv6)
|
|
}
|
|
}
|
|
|
|
return networkSettings, nil
|
|
}
|
|
|
|
func (container *Container) updateJoinInfo(ep libnetwork.Endpoint) error {
|
|
epInfo := ep.Info()
|
|
if epInfo == nil {
|
|
// It is not an error to get an empty endpoint info
|
|
return nil
|
|
}
|
|
|
|
container.NetworkSettings.Gateway = epInfo.Gateway().String()
|
|
if epInfo.GatewayIPv6().To16() != nil {
|
|
container.NetworkSettings.IPv6Gateway = epInfo.GatewayIPv6().String()
|
|
}
|
|
|
|
container.NetworkSettings.SandboxKey = epInfo.SandboxKey()
|
|
|
|
return nil
|
|
}
|
|
|
|
func (container *Container) updateNetworkSettings(n libnetwork.Network, ep libnetwork.Endpoint) error {
|
|
networkSettings := &network.Settings{NetworkID: n.ID(), EndpointID: ep.ID()}
|
|
|
|
networkSettings, err := container.buildPortMapInfo(n, ep, networkSettings)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
networkSettings, err = container.buildEndpointInfo(n, ep, networkSettings)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if container.hostConfig.NetworkMode == runconfig.NetworkMode("bridge") {
|
|
networkSettings.Bridge = container.daemon.config.Bridge.Iface
|
|
}
|
|
|
|
container.NetworkSettings = networkSettings
|
|
return nil
|
|
}
|
|
|
|
func (container *Container) UpdateNetwork() error {
|
|
n, err := container.daemon.netController.NetworkByID(container.NetworkSettings.NetworkID)
|
|
if err != nil {
|
|
return fmt.Errorf("error locating network id %s: %v", container.NetworkSettings.NetworkID, err)
|
|
}
|
|
|
|
ep, err := n.EndpointByID(container.NetworkSettings.EndpointID)
|
|
if err != nil {
|
|
return fmt.Errorf("error locating endpoint id %s: %v", container.NetworkSettings.EndpointID, err)
|
|
}
|
|
|
|
if err := ep.Leave(container.ID); err != nil {
|
|
return fmt.Errorf("endpoint leave failed: %v", err)
|
|
|
|
}
|
|
|
|
joinOptions, err := container.buildJoinOptions()
|
|
if err != nil {
|
|
return fmt.Errorf("Update network failed: %v", err)
|
|
}
|
|
|
|
if _, err := ep.Join(container.ID, joinOptions...); err != nil {
|
|
return fmt.Errorf("endpoint join failed: %v", err)
|
|
}
|
|
|
|
if err := container.updateJoinInfo(ep); err != nil {
|
|
return fmt.Errorf("Updating join info failed: %v", err)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (container *Container) buildCreateEndpointOptions() ([]libnetwork.EndpointOption, error) {
|
|
var (
|
|
portSpecs = make(nat.PortSet)
|
|
bindings = make(nat.PortMap)
|
|
pbList []netutils.PortBinding
|
|
exposeList []netutils.TransportPort
|
|
createOptions []libnetwork.EndpointOption
|
|
)
|
|
|
|
if container.Config.PortSpecs != nil {
|
|
if err := migratePortMappings(container.Config, container.hostConfig); err != nil {
|
|
return nil, err
|
|
}
|
|
container.Config.PortSpecs = nil
|
|
if err := container.WriteHostConfig(); err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
|
|
if container.Config.ExposedPorts != nil {
|
|
portSpecs = container.Config.ExposedPorts
|
|
}
|
|
|
|
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,
|
|
})
|
|
}
|
|
}
|
|
}
|
|
|
|
container.NetworkSettings.PortMapping = nil
|
|
|
|
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 := netutils.TransportPort{}
|
|
expose.Proto = netutils.ParseProtocol(port.Proto())
|
|
expose.Port = uint16(port.Int())
|
|
exposeList = append(exposeList, expose)
|
|
|
|
pb := netutils.PortBinding{Port: expose.Port, Proto: expose.Proto}
|
|
binding := bindings[port]
|
|
for i := 0; i < len(binding); i++ {
|
|
pbCopy := pb.GetCopy()
|
|
pbCopy.HostPort = uint16(nat.Port(binding[i].HostPort).Int())
|
|
pbCopy.HostIP = net.ParseIP(binding[i].HostIp)
|
|
pbList = append(pbList, pbCopy)
|
|
}
|
|
|
|
if container.hostConfig.PublishAllPorts && len(binding) == 0 {
|
|
pbList = append(pbList, pb)
|
|
}
|
|
}
|
|
|
|
createOptions = append(createOptions,
|
|
libnetwork.CreateOptionPortMapping(pbList),
|
|
libnetwork.CreateOptionExposedPorts(exposeList))
|
|
|
|
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))
|
|
}
|
|
|
|
return createOptions, nil
|
|
}
|
|
|
|
func (container *Container) AllocateNetwork() error {
|
|
mode := container.hostConfig.NetworkMode
|
|
if container.Config.NetworkDisabled || mode.IsContainer() {
|
|
return nil
|
|
}
|
|
|
|
var err error
|
|
|
|
n, err := container.daemon.netController.NetworkByName(string(mode))
|
|
if err != nil {
|
|
return fmt.Errorf("error locating network with name %s: %v", string(mode), err)
|
|
}
|
|
|
|
createOptions, err := container.buildCreateEndpointOptions()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
ep, err := n.CreateEndpoint(container.Name, createOptions...)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if err := container.updateNetworkSettings(n, ep); err != nil {
|
|
return err
|
|
}
|
|
|
|
joinOptions, err := container.buildJoinOptions()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if _, err := ep.Join(container.ID, joinOptions...); err != nil {
|
|
return err
|
|
}
|
|
|
|
if err := container.updateJoinInfo(ep); err != nil {
|
|
return fmt.Errorf("Updating join info failed: %v", err)
|
|
}
|
|
|
|
if err := container.WriteHostConfig(); err != nil {
|
|
return err
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (container *Container) initializeNetworking() error {
|
|
var err error
|
|
|
|
// Make sure NetworkMode has an acceptable value before
|
|
// initializing networking.
|
|
if container.hostConfig.NetworkMode == runconfig.NetworkMode("") {
|
|
container.hostConfig.NetworkMode = runconfig.NetworkMode("bridge")
|
|
}
|
|
|
|
if container.hostConfig.NetworkMode.IsContainer() {
|
|
// we need to get the hosts files from the container to join
|
|
nc, err := container.getNetworkedContainer()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
container.HostnamePath = nc.HostnamePath
|
|
container.HostsPath = nc.HostsPath
|
|
container.ResolvConfPath = nc.ResolvConfPath
|
|
container.Config.Hostname = nc.Config.Hostname
|
|
container.Config.Domainname = nc.Config.Domainname
|
|
return nil
|
|
}
|
|
|
|
if container.daemon.config.DisableNetwork {
|
|
container.Config.NetworkDisabled = true
|
|
}
|
|
|
|
if container.hostConfig.NetworkMode.IsHost() {
|
|
container.Config.Hostname, err = os.Hostname()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
parts := strings.SplitN(container.Config.Hostname, ".", 2)
|
|
if len(parts) > 1 {
|
|
container.Config.Hostname = parts[0]
|
|
container.Config.Domainname = parts[1]
|
|
}
|
|
|
|
}
|
|
|
|
if err := container.AllocateNetwork(); err != nil {
|
|
return err
|
|
}
|
|
|
|
return container.buildHostnameFile()
|
|
}
|
|
|
|
// Make sure the config is compatible with the current kernel
|
|
func (container *Container) verifyDaemonSettings() {
|
|
if container.hostConfig.Memory > 0 && !container.daemon.sysInfo.MemoryLimit {
|
|
logrus.Warnf("Your kernel does not support memory limit capabilities. Limitation discarded.")
|
|
container.hostConfig.Memory = 0
|
|
}
|
|
if container.hostConfig.Memory > 0 && container.hostConfig.MemorySwap != -1 && !container.daemon.sysInfo.SwapLimit {
|
|
logrus.Warnf("Your kernel does not support swap limit capabilities. Limitation discarded.")
|
|
container.hostConfig.MemorySwap = -1
|
|
}
|
|
if container.daemon.sysInfo.IPv4ForwardingDisabled {
|
|
logrus.Warnf("IPv4 forwarding is disabled. Networking will not work")
|
|
}
|
|
}
|
|
|
|
func (container *Container) ExportRw() (archive.Archive, error) {
|
|
if err := container.Mount(); err != nil {
|
|
return nil, err
|
|
}
|
|
if container.daemon == nil {
|
|
return nil, fmt.Errorf("Can't load storage driver for unregistered container %s", container.ID)
|
|
}
|
|
archive, err := container.daemon.Diff(container)
|
|
if err != nil {
|
|
container.Unmount()
|
|
return nil, err
|
|
}
|
|
return ioutils.NewReadCloserWrapper(archive, func() error {
|
|
err := archive.Close()
|
|
container.Unmount()
|
|
return err
|
|
}),
|
|
nil
|
|
}
|
|
|
|
func (container *Container) getIpcContainer() (*Container, error) {
|
|
containerID := container.hostConfig.IpcMode.Container()
|
|
c, err := container.daemon.Get(containerID)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if !c.IsRunning() {
|
|
return nil, fmt.Errorf("cannot join IPC of a non running container: %s", containerID)
|
|
}
|
|
return c, nil
|
|
}
|
|
|
|
func (container *Container) setupWorkingDirectory() error {
|
|
if container.Config.WorkingDir != "" {
|
|
container.Config.WorkingDir = filepath.Clean(container.Config.WorkingDir)
|
|
|
|
pth, err := container.GetResourcePath(container.Config.WorkingDir)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
pthInfo, err := os.Stat(pth)
|
|
if err != nil {
|
|
if !os.IsNotExist(err) {
|
|
return err
|
|
}
|
|
|
|
if err := os.MkdirAll(pth, 0755); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
if pthInfo != nil && !pthInfo.IsDir() {
|
|
return fmt.Errorf("Cannot mkdir: %s is not a directory", container.Config.WorkingDir)
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (container *Container) getNetworkedContainer() (*Container, error) {
|
|
parts := strings.SplitN(string(container.hostConfig.NetworkMode), ":", 2)
|
|
switch parts[0] {
|
|
case "container":
|
|
if len(parts) != 2 {
|
|
return nil, fmt.Errorf("no container specified to join network")
|
|
}
|
|
nc, err := container.daemon.Get(parts[1])
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if container == nc {
|
|
return nil, fmt.Errorf("cannot join own network")
|
|
}
|
|
if !nc.IsRunning() {
|
|
return nil, fmt.Errorf("cannot join network of a non running container: %s", parts[1])
|
|
}
|
|
return nc, nil
|
|
default:
|
|
return nil, fmt.Errorf("network mode not set to container")
|
|
}
|
|
}
|
|
|
|
func (container *Container) ReleaseNetwork() {
|
|
if container.hostConfig.NetworkMode.IsContainer() {
|
|
return
|
|
}
|
|
|
|
n, err := container.daemon.netController.NetworkByID(container.NetworkSettings.NetworkID)
|
|
if err != nil {
|
|
logrus.Errorf("error locating network id %s: %v", container.NetworkSettings.NetworkID, err)
|
|
return
|
|
}
|
|
|
|
ep, err := n.EndpointByID(container.NetworkSettings.EndpointID)
|
|
if err != nil {
|
|
logrus.Errorf("error locating endpoint id %s: %v", container.NetworkSettings.EndpointID, err)
|
|
return
|
|
}
|
|
|
|
if err := ep.Leave(container.ID); err != nil {
|
|
logrus.Errorf("leaving endpoint failed: %v", err)
|
|
}
|
|
|
|
if err := ep.Delete(); err != nil {
|
|
logrus.Errorf("deleting endpoint failed: %v", err)
|
|
}
|
|
|
|
container.NetworkSettings = &network.Settings{}
|
|
}
|
|
|
|
func disableAllActiveLinks(container *Container) {
|
|
if container.activeLinks != nil {
|
|
for _, link := range container.activeLinks {
|
|
link.Disable()
|
|
}
|
|
}
|
|
}
|
|
|
|
func (container *Container) DisableLink(name string) {
|
|
if container.activeLinks != nil {
|
|
if link, exists := container.activeLinks[name]; exists {
|
|
link.Disable()
|
|
delete(container.activeLinks, name)
|
|
if err := container.UpdateNetwork(); err != nil {
|
|
logrus.Debugf("Could not update network to remove link: %v", err)
|
|
}
|
|
} else {
|
|
logrus.Debugf("Could not find active link for %s", name)
|
|
}
|
|
}
|
|
}
|