990 lines
26 KiB
Go
990 lines
26 KiB
Go
package daemon
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import (
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"errors"
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"fmt"
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"io"
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"io/ioutil"
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"os"
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"path/filepath"
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"regexp"
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"runtime"
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"strings"
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"sync"
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"time"
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"github.com/Sirupsen/logrus"
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"github.com/docker/docker/api"
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"github.com/docker/docker/daemon/events"
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"github.com/docker/docker/daemon/execdriver"
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"github.com/docker/docker/daemon/execdriver/execdrivers"
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"github.com/docker/docker/daemon/graphdriver"
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_ "github.com/docker/docker/daemon/graphdriver/vfs"
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"github.com/docker/docker/daemon/logger"
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"github.com/docker/docker/daemon/network"
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"github.com/docker/docker/graph"
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"github.com/docker/docker/pkg/broadcastwriter"
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"github.com/docker/docker/pkg/fileutils"
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"github.com/docker/docker/pkg/graphdb"
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"github.com/docker/docker/pkg/ioutils"
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"github.com/docker/docker/pkg/namesgenerator"
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"github.com/docker/docker/pkg/stringid"
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"github.com/docker/docker/pkg/sysinfo"
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"github.com/docker/docker/pkg/system"
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"github.com/docker/docker/pkg/truncindex"
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"github.com/docker/docker/registry"
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"github.com/docker/docker/runconfig"
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"github.com/docker/docker/trust"
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"github.com/docker/libcontainer/netlink"
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"github.com/docker/libnetwork"
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)
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var (
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validContainerNameChars = `[a-zA-Z0-9][a-zA-Z0-9_.-]`
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validContainerNamePattern = regexp.MustCompile(`^/?` + validContainerNameChars + `+$`)
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ErrSystemNotSupported = errors.New("The Docker daemon is not supported on this platform.")
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)
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type contStore struct {
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s map[string]*Container
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sync.Mutex
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}
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func (c *contStore) Add(id string, cont *Container) {
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c.Lock()
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c.s[id] = cont
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c.Unlock()
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}
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func (c *contStore) Get(id string) *Container {
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c.Lock()
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res := c.s[id]
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c.Unlock()
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return res
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}
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func (c *contStore) Delete(id string) {
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c.Lock()
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delete(c.s, id)
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c.Unlock()
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}
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func (c *contStore) List() []*Container {
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containers := new(History)
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c.Lock()
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for _, cont := range c.s {
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containers.Add(cont)
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}
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c.Unlock()
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containers.Sort()
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return *containers
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}
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type Daemon struct {
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ID string
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repository string
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sysInitPath string
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containers *contStore
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execCommands *execStore
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graph *graph.Graph
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repositories *graph.TagStore
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idIndex *truncindex.TruncIndex
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sysInfo *sysinfo.SysInfo
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config *Config
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containerGraph *graphdb.Database
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driver graphdriver.Driver
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execDriver execdriver.Driver
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statsCollector *statsCollector
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defaultLogConfig runconfig.LogConfig
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RegistryService *registry.Service
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EventsService *events.Events
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netController libnetwork.NetworkController
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root string
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}
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// Get looks for a container using the provided information, which could be
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// one of the following inputs from the caller:
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// - A full container ID, which will exact match a container in daemon's list
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// - A container name, which will only exact match via the GetByName() function
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// - A partial container ID prefix (e.g. short ID) of any length that is
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// unique enough to only return a single container object
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// If none of these searches succeed, an error is returned
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func (daemon *Daemon) Get(prefixOrName string) (*Container, error) {
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if containerByID := daemon.containers.Get(prefixOrName); containerByID != nil {
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// prefix is an exact match to a full container ID
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return containerByID, nil
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}
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// GetByName will match only an exact name provided; we ignore errors
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if containerByName, _ := daemon.GetByName(prefixOrName); containerByName != nil {
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// prefix is an exact match to a full container Name
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return containerByName, nil
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}
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containerId, indexError := daemon.idIndex.Get(prefixOrName)
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if indexError != nil {
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return nil, indexError
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}
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return daemon.containers.Get(containerId), nil
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}
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// Exists returns a true if a container of the specified ID or name exists,
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// false otherwise.
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func (daemon *Daemon) Exists(id string) bool {
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c, _ := daemon.Get(id)
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return c != nil
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}
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func (daemon *Daemon) containerRoot(id string) string {
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return filepath.Join(daemon.repository, id)
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}
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// Load reads the contents of a container from disk
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// This is typically done at startup.
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func (daemon *Daemon) load(id string) (*Container, error) {
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container := &Container{
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CommonContainer: daemon.newBaseContainer(id),
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}
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if err := container.FromDisk(); err != nil {
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return nil, err
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}
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if container.ID != id {
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return container, fmt.Errorf("Container %s is stored at %s", container.ID, id)
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}
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return container, nil
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}
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// Register makes a container object usable by the daemon as <container.ID>
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// This is a wrapper for register
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func (daemon *Daemon) Register(container *Container) error {
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return daemon.register(container, true)
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}
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// register makes a container object usable by the daemon as <container.ID>
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func (daemon *Daemon) register(container *Container, updateSuffixarray bool) error {
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if container.daemon != nil || daemon.Exists(container.ID) {
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return fmt.Errorf("Container is already loaded")
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}
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if err := validateID(container.ID); err != nil {
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return err
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}
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if err := daemon.ensureName(container); err != nil {
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return err
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}
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container.daemon = daemon
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// Attach to stdout and stderr
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container.stderr = broadcastwriter.New()
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container.stdout = broadcastwriter.New()
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// Attach to stdin
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if container.Config.OpenStdin {
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container.stdin, container.stdinPipe = io.Pipe()
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} else {
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container.stdinPipe = ioutils.NopWriteCloser(ioutil.Discard) // Silently drop stdin
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}
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// done
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daemon.containers.Add(container.ID, container)
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// don't update the Suffixarray if we're starting up
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// we'll waste time if we update it for every container
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daemon.idIndex.Add(container.ID)
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if err := daemon.verifyVolumesInfo(container); err != nil {
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return err
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}
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if err := container.prepareMountPoints(); err != nil {
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return err
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}
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if container.IsRunning() {
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logrus.Debugf("killing old running container %s", container.ID)
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// Set exit code to 128 + SIGKILL (9) to properly represent unsuccessful exit
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container.SetStopped(&execdriver.ExitStatus{ExitCode: 137})
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// use the current driver and ensure that the container is dead x.x
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cmd := &execdriver.Command{
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ID: container.ID,
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}
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daemon.execDriver.Terminate(cmd)
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if err := container.Unmount(); err != nil {
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logrus.Debugf("unmount error %s", err)
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}
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if err := container.ToDisk(); err != nil {
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logrus.Errorf("Error saving stopped state to disk: %v", err)
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}
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}
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return nil
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}
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func (daemon *Daemon) ensureName(container *Container) error {
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if container.Name == "" {
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name, err := daemon.generateNewName(container.ID)
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if err != nil {
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return err
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}
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container.Name = name
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if err := container.ToDisk(); err != nil {
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logrus.Errorf("Error saving container name to disk: %v", err)
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}
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}
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return nil
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}
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func (daemon *Daemon) restore() error {
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type cr struct {
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container *Container
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registered bool
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}
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var (
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debug = (os.Getenv("DEBUG") != "" || os.Getenv("TEST") != "")
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currentDriver = daemon.driver.String()
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containers = make(map[string]*cr)
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)
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if !debug {
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logrus.Info("Loading containers: start.")
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}
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dir, err := ioutil.ReadDir(daemon.repository)
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if err != nil {
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return err
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}
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for _, v := range dir {
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id := v.Name()
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container, err := daemon.load(id)
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if !debug && logrus.GetLevel() == logrus.InfoLevel {
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fmt.Print(".")
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}
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if err != nil {
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logrus.Errorf("Failed to load container %v: %v", id, err)
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continue
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}
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// Ignore the container if it does not support the current driver being used by the graph
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if (container.Driver == "" && currentDriver == "aufs") || container.Driver == currentDriver {
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logrus.Debugf("Loaded container %v", container.ID)
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containers[container.ID] = &cr{container: container}
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} else {
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logrus.Debugf("Cannot load container %s because it was created with another graph driver.", container.ID)
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}
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}
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if entities := daemon.containerGraph.List("/", -1); entities != nil {
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for _, p := range entities.Paths() {
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if !debug && logrus.GetLevel() == logrus.InfoLevel {
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fmt.Print(".")
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}
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e := entities[p]
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if c, ok := containers[e.ID()]; ok {
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c.registered = true
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}
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}
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}
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group := sync.WaitGroup{}
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for _, c := range containers {
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group.Add(1)
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go func(container *Container, registered bool) {
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defer group.Done()
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if !registered {
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// Try to set the default name for a container if it exists prior to links
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container.Name, err = daemon.generateNewName(container.ID)
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if err != nil {
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logrus.Debugf("Setting default id - %s", err)
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}
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}
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if err := daemon.register(container, false); err != nil {
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logrus.Debugf("Failed to register container %s: %s", container.ID, err)
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}
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// check the restart policy on the containers and restart any container with
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// the restart policy of "always"
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if daemon.config.AutoRestart && container.shouldRestart() {
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logrus.Debugf("Starting container %s", container.ID)
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if err := container.Start(); err != nil {
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logrus.Debugf("Failed to start container %s: %s", container.ID, err)
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}
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}
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}(c.container, c.registered)
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}
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group.Wait()
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if !debug {
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if logrus.GetLevel() == logrus.InfoLevel {
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fmt.Println()
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}
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logrus.Info("Loading containers: done.")
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}
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return nil
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}
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func (daemon *Daemon) mergeAndVerifyConfig(config *runconfig.Config, img *graph.Image) error {
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if img != nil && img.Config != nil {
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if err := runconfig.Merge(config, img.Config); err != nil {
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return err
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}
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}
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if config.Entrypoint.Len() == 0 && config.Cmd.Len() == 0 {
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return fmt.Errorf("No command specified")
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}
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return nil
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}
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func (daemon *Daemon) generateIdAndName(name string) (string, string, error) {
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var (
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err error
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id = stringid.GenerateRandomID()
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)
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if name == "" {
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if name, err = daemon.generateNewName(id); err != nil {
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return "", "", err
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}
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return id, name, nil
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}
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if name, err = daemon.reserveName(id, name); err != nil {
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return "", "", err
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}
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return id, name, nil
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}
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func (daemon *Daemon) reserveName(id, name string) (string, error) {
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if !validContainerNamePattern.MatchString(name) {
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return "", fmt.Errorf("Invalid container name (%s), only %s are allowed", name, validContainerNameChars)
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}
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if name[0] != '/' {
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name = "/" + name
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}
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if _, err := daemon.containerGraph.Set(name, id); err != nil {
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if !graphdb.IsNonUniqueNameError(err) {
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return "", err
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}
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conflictingContainer, err := daemon.GetByName(name)
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if err != nil {
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if strings.Contains(err.Error(), "Could not find entity") {
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return "", err
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}
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// Remove name and continue starting the container
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if err := daemon.containerGraph.Delete(name); err != nil {
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return "", err
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}
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} else {
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nameAsKnownByUser := strings.TrimPrefix(name, "/")
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return "", fmt.Errorf(
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"Conflict. The name %q is already in use by container %s. You have to delete (or rename) that container to be able to reuse that name.", nameAsKnownByUser,
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stringid.TruncateID(conflictingContainer.ID))
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}
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}
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return name, nil
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}
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func (daemon *Daemon) generateNewName(id string) (string, error) {
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var name string
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for i := 0; i < 6; i++ {
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name = namesgenerator.GetRandomName(i)
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if name[0] != '/' {
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name = "/" + name
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}
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if _, err := daemon.containerGraph.Set(name, id); err != nil {
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if !graphdb.IsNonUniqueNameError(err) {
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return "", err
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}
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continue
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}
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return name, nil
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}
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name = "/" + stringid.TruncateID(id)
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if _, err := daemon.containerGraph.Set(name, id); err != nil {
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return "", err
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}
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return name, nil
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}
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func (daemon *Daemon) generateHostname(id string, config *runconfig.Config) {
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// Generate default hostname
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// FIXME: the lxc template no longer needs to set a default hostname
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if config.Hostname == "" {
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config.Hostname = id[:12]
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}
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}
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func (daemon *Daemon) getEntrypointAndArgs(configEntrypoint *runconfig.Entrypoint, configCmd *runconfig.Command) (string, []string) {
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var (
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entrypoint string
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args []string
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)
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cmdSlice := configCmd.Slice()
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if configEntrypoint.Len() != 0 {
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eSlice := configEntrypoint.Slice()
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entrypoint = eSlice[0]
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args = append(eSlice[1:], cmdSlice...)
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} else {
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entrypoint = cmdSlice[0]
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args = cmdSlice[1:]
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}
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return entrypoint, args
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}
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func (daemon *Daemon) newContainer(name string, config *runconfig.Config, imgID string) (*Container, error) {
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var (
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id string
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err error
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)
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id, name, err = daemon.generateIdAndName(name)
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if err != nil {
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return nil, err
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}
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daemon.generateHostname(id, config)
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entrypoint, args := daemon.getEntrypointAndArgs(config.Entrypoint, config.Cmd)
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base := daemon.newBaseContainer(id)
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base.Created = time.Now().UTC()
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base.Path = entrypoint
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base.Args = args //FIXME: de-duplicate from config
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base.Config = config
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base.hostConfig = &runconfig.HostConfig{}
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base.ImageID = imgID
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base.NetworkSettings = &network.Settings{}
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base.Name = name
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base.Driver = daemon.driver.String()
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base.ExecDriver = daemon.execDriver.Name()
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container := &Container{
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CommonContainer: base,
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}
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return container, err
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}
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func GetFullContainerName(name string) (string, error) {
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if name == "" {
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return "", fmt.Errorf("Container name cannot be empty")
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}
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if name[0] != '/' {
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name = "/" + name
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}
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return name, nil
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}
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func (daemon *Daemon) GetByName(name string) (*Container, error) {
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fullName, err := GetFullContainerName(name)
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if err != nil {
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return nil, err
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}
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entity := daemon.containerGraph.Get(fullName)
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if entity == nil {
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return nil, fmt.Errorf("Could not find entity for %s", name)
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}
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e := daemon.containers.Get(entity.ID())
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if e == nil {
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return nil, fmt.Errorf("Could not find container for entity id %s", entity.ID())
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}
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return e, nil
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}
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func (daemon *Daemon) Children(name string) (map[string]*Container, error) {
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name, err := GetFullContainerName(name)
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if err != nil {
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return nil, err
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}
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children := make(map[string]*Container)
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err = daemon.containerGraph.Walk(name, func(p string, e *graphdb.Entity) error {
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c, err := daemon.Get(e.ID())
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if err != nil {
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return err
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}
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children[p] = c
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return nil
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}, 0)
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if err != nil {
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return nil, err
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}
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return children, nil
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}
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func (daemon *Daemon) Parents(name string) ([]string, error) {
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name, err := GetFullContainerName(name)
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if err != nil {
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return nil, err
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}
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return daemon.containerGraph.Parents(name)
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}
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func (daemon *Daemon) RegisterLink(parent, child *Container, alias string) error {
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fullName := filepath.Join(parent.Name, alias)
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if !daemon.containerGraph.Exists(fullName) {
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_, err := daemon.containerGraph.Set(fullName, child.ID)
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return err
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}
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return nil
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}
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func NewDaemon(config *Config, registryService *registry.Service) (daemon *Daemon, err error) {
|
|
setDefaultMtu(config)
|
|
|
|
// Ensure we have compatible configuration options
|
|
if err := checkConfigOptions(config); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// Do we have a disabled network?
|
|
config.DisableBridge = isBridgeNetworkDisabled(config)
|
|
|
|
// Verify the platform is supported as a daemon
|
|
if runtime.GOOS != "linux" && runtime.GOOS != "windows" {
|
|
return nil, ErrSystemNotSupported
|
|
}
|
|
|
|
// Validate platform-specific requirements
|
|
if err := checkSystem(); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// set up SIGUSR1 handler on Unix-like systems, or a Win32 global event
|
|
// on Windows to dump Go routine stacks
|
|
setupDumpStackTrap()
|
|
|
|
// get the canonical path to the Docker root directory
|
|
var realRoot string
|
|
if _, err := os.Stat(config.Root); err != nil && os.IsNotExist(err) {
|
|
realRoot = config.Root
|
|
} else {
|
|
realRoot, err = fileutils.ReadSymlinkedDirectory(config.Root)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("Unable to get the full path to root (%s): %s", config.Root, err)
|
|
}
|
|
}
|
|
config.Root = realRoot
|
|
// Create the root directory if it doesn't exists
|
|
if err := system.MkdirAll(config.Root, 0700); err != nil && !os.IsExist(err) {
|
|
return nil, err
|
|
}
|
|
|
|
// set up the tmpDir to use a canonical path
|
|
tmp, err := tempDir(config.Root)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("Unable to get the TempDir under %s: %s", config.Root, err)
|
|
}
|
|
realTmp, err := fileutils.ReadSymlinkedDirectory(tmp)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("Unable to get the full path to the TempDir (%s): %s", tmp, err)
|
|
}
|
|
os.Setenv("TMPDIR", realTmp)
|
|
|
|
// Set the default driver
|
|
graphdriver.DefaultDriver = config.GraphDriver
|
|
|
|
// Load storage driver
|
|
driver, err := graphdriver.New(config.Root, config.GraphOptions)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("error initializing graphdriver: %v", err)
|
|
}
|
|
logrus.Debugf("Using graph driver %s", driver)
|
|
|
|
d := &Daemon{}
|
|
d.driver = driver
|
|
|
|
// Ensure the graph driver is shutdown at a later point
|
|
defer func() {
|
|
if err != nil {
|
|
if err := d.Shutdown(); err != nil {
|
|
logrus.Error(err)
|
|
}
|
|
}
|
|
}()
|
|
|
|
// Verify logging driver type
|
|
if config.LogConfig.Type != "none" {
|
|
if _, err := logger.GetLogDriver(config.LogConfig.Type); err != nil {
|
|
return nil, fmt.Errorf("error finding the logging driver: %v", err)
|
|
}
|
|
}
|
|
logrus.Debugf("Using default logging driver %s", config.LogConfig.Type)
|
|
|
|
// Configure and validate the kernels security support
|
|
if err := configureKernelSecuritySupport(config, d.driver.String()); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
daemonRepo := filepath.Join(config.Root, "containers")
|
|
|
|
if err := system.MkdirAll(daemonRepo, 0700); err != nil && !os.IsExist(err) {
|
|
return nil, err
|
|
}
|
|
|
|
// Migrate the container if it is aufs and aufs is enabled
|
|
if err := migrateIfDownlevel(d.driver, config.Root); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
logrus.Debug("Creating images graph")
|
|
g, err := graph.NewGraph(filepath.Join(config.Root, "graph"), d.driver)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// Configure the volumes driver
|
|
if err := configureVolumes(config); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
trustKey, err := api.LoadOrCreateTrustKey(config.TrustKeyPath)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
trustDir := filepath.Join(config.Root, "trust")
|
|
|
|
if err := system.MkdirAll(trustDir, 0700); err != nil && !os.IsExist(err) {
|
|
return nil, err
|
|
}
|
|
trustService, err := trust.NewTrustStore(trustDir)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("could not create trust store: %s", err)
|
|
}
|
|
|
|
eventsService := events.New()
|
|
logrus.Debug("Creating repository list")
|
|
tagCfg := &graph.TagStoreConfig{
|
|
Graph: g,
|
|
Key: trustKey,
|
|
Registry: registryService,
|
|
Events: eventsService,
|
|
Trust: trustService,
|
|
}
|
|
repositories, err := graph.NewTagStore(filepath.Join(config.Root, "repositories-"+d.driver.String()), tagCfg)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("Couldn't create Tag store: %s", err)
|
|
}
|
|
|
|
d.netController, err = initNetworkController(config)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("Error initializing network controller: %v", err)
|
|
}
|
|
|
|
graphdbPath := filepath.Join(config.Root, "linkgraph.db")
|
|
graph, err := graphdb.NewSqliteConn(graphdbPath)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
d.containerGraph = graph
|
|
|
|
var sysInitPath string
|
|
if config.ExecDriver == "lxc" {
|
|
initPath, err := configureSysInit(config)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
sysInitPath = initPath
|
|
}
|
|
|
|
sysInfo := sysinfo.New(false)
|
|
// Check if Devices cgroup is mounted, it is hard requirement for container security,
|
|
// on Linux/FreeBSD.
|
|
if runtime.GOOS != "windows" && !sysInfo.CgroupDevicesEnabled {
|
|
return nil, fmt.Errorf("Devices cgroup isn't mounted")
|
|
}
|
|
|
|
ed, err := execdrivers.NewDriver(config.ExecDriver, config.ExecOptions, config.ExecRoot, config.Root, sysInitPath, sysInfo)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
d.ID = trustKey.PublicKey().KeyID()
|
|
d.repository = daemonRepo
|
|
d.containers = &contStore{s: make(map[string]*Container)}
|
|
d.execCommands = newExecStore()
|
|
d.graph = g
|
|
d.repositories = repositories
|
|
d.idIndex = truncindex.NewTruncIndex([]string{})
|
|
d.sysInfo = sysInfo
|
|
d.config = config
|
|
d.sysInitPath = sysInitPath
|
|
d.execDriver = ed
|
|
d.statsCollector = newStatsCollector(1 * time.Second)
|
|
d.defaultLogConfig = config.LogConfig
|
|
d.RegistryService = registryService
|
|
d.EventsService = eventsService
|
|
d.root = config.Root
|
|
go d.execCommandGC()
|
|
|
|
if err := d.restore(); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return d, nil
|
|
}
|
|
|
|
func (daemon *Daemon) Shutdown() error {
|
|
if daemon.containers != nil {
|
|
group := sync.WaitGroup{}
|
|
logrus.Debug("starting clean shutdown of all containers...")
|
|
for _, container := range daemon.List() {
|
|
c := container
|
|
if c.IsRunning() {
|
|
logrus.Debugf("stopping %s", c.ID)
|
|
group.Add(1)
|
|
|
|
go func() {
|
|
defer group.Done()
|
|
// If container failed to exit in 10 seconds of SIGTERM, then using the force
|
|
if err := c.Stop(10); err != nil {
|
|
logrus.Errorf("Stop container %s with error: %v", c.ID, err)
|
|
}
|
|
c.WaitStop(-1 * time.Second)
|
|
logrus.Debugf("container stopped %s", c.ID)
|
|
}()
|
|
}
|
|
}
|
|
group.Wait()
|
|
|
|
// trigger libnetwork GC only if it's initialized
|
|
if daemon.netController != nil {
|
|
daemon.netController.GC()
|
|
}
|
|
}
|
|
|
|
if daemon.containerGraph != nil {
|
|
if err := daemon.containerGraph.Close(); err != nil {
|
|
logrus.Errorf("Error during container graph.Close(): %v", err)
|
|
}
|
|
}
|
|
|
|
if daemon.driver != nil {
|
|
if err := daemon.driver.Cleanup(); err != nil {
|
|
logrus.Errorf("Error during graph storage driver.Cleanup(): %v", err)
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (daemon *Daemon) Mount(container *Container) error {
|
|
dir, err := daemon.driver.Get(container.ID, container.GetMountLabel())
|
|
if err != nil {
|
|
return fmt.Errorf("Error getting container %s from driver %s: %s", container.ID, daemon.driver, err)
|
|
}
|
|
|
|
if container.basefs != dir {
|
|
// The mount path reported by the graph driver should always be trusted on Windows, since the
|
|
// volume path for a given mounted layer may change over time. This should only be an error
|
|
// on non-Windows operating systems.
|
|
if container.basefs != "" && runtime.GOOS != "windows" {
|
|
daemon.driver.Put(container.ID)
|
|
return fmt.Errorf("Error: driver %s is returning inconsistent paths for container %s ('%s' then '%s')",
|
|
daemon.driver, container.ID, container.basefs, dir)
|
|
}
|
|
}
|
|
container.basefs = dir
|
|
return nil
|
|
}
|
|
|
|
func (daemon *Daemon) Unmount(container *Container) error {
|
|
daemon.driver.Put(container.ID)
|
|
return nil
|
|
}
|
|
|
|
func (daemon *Daemon) Run(c *Container, pipes *execdriver.Pipes, startCallback execdriver.StartCallback) (execdriver.ExitStatus, error) {
|
|
return daemon.execDriver.Run(c.command, pipes, startCallback)
|
|
}
|
|
|
|
func (daemon *Daemon) Kill(c *Container, sig int) error {
|
|
return daemon.execDriver.Kill(c.command, sig)
|
|
}
|
|
|
|
func (daemon *Daemon) Stats(c *Container) (*execdriver.ResourceStats, error) {
|
|
return daemon.execDriver.Stats(c.ID)
|
|
}
|
|
|
|
func (daemon *Daemon) SubscribeToContainerStats(name string) (chan interface{}, error) {
|
|
c, err := daemon.Get(name)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
ch := daemon.statsCollector.collect(c)
|
|
return ch, nil
|
|
}
|
|
|
|
func (daemon *Daemon) UnsubscribeToContainerStats(name string, ch chan interface{}) error {
|
|
c, err := daemon.Get(name)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
daemon.statsCollector.unsubscribe(c, ch)
|
|
return nil
|
|
}
|
|
|
|
// FIXME: this is a convenience function for integration tests
|
|
// which need direct access to daemon.graph.
|
|
// Once the tests switch to using engine and jobs, this method
|
|
// can go away.
|
|
func (daemon *Daemon) Graph() *graph.Graph {
|
|
return daemon.graph
|
|
}
|
|
|
|
func (daemon *Daemon) Repositories() *graph.TagStore {
|
|
return daemon.repositories
|
|
}
|
|
|
|
func (daemon *Daemon) Config() *Config {
|
|
return daemon.config
|
|
}
|
|
|
|
func (daemon *Daemon) SystemConfig() *sysinfo.SysInfo {
|
|
return daemon.sysInfo
|
|
}
|
|
|
|
func (daemon *Daemon) SystemInitPath() string {
|
|
return daemon.sysInitPath
|
|
}
|
|
|
|
func (daemon *Daemon) GraphDriver() graphdriver.Driver {
|
|
return daemon.driver
|
|
}
|
|
|
|
func (daemon *Daemon) ExecutionDriver() execdriver.Driver {
|
|
return daemon.execDriver
|
|
}
|
|
|
|
func (daemon *Daemon) ContainerGraph() *graphdb.Database {
|
|
return daemon.containerGraph
|
|
}
|
|
|
|
func (daemon *Daemon) ImageGetCached(imgID string, config *runconfig.Config) (*graph.Image, error) {
|
|
// Retrieve all images
|
|
images, err := daemon.Graph().Map()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// Store the tree in a map of map (map[parentId][childId])
|
|
imageMap := make(map[string]map[string]struct{})
|
|
for _, img := range images {
|
|
if _, exists := imageMap[img.Parent]; !exists {
|
|
imageMap[img.Parent] = make(map[string]struct{})
|
|
}
|
|
imageMap[img.Parent][img.ID] = struct{}{}
|
|
}
|
|
|
|
// Loop on the children of the given image and check the config
|
|
var match *graph.Image
|
|
for elem := range imageMap[imgID] {
|
|
img, ok := images[elem]
|
|
if !ok {
|
|
return nil, fmt.Errorf("unable to find image %q", elem)
|
|
}
|
|
if runconfig.Compare(&img.ContainerConfig, config) {
|
|
if match == nil || match.Created.Before(img.Created) {
|
|
match = img
|
|
}
|
|
}
|
|
}
|
|
return match, nil
|
|
}
|
|
|
|
// tempDir returns the default directory to use for temporary files.
|
|
func tempDir(rootDir string) (string, error) {
|
|
var tmpDir string
|
|
if tmpDir = os.Getenv("DOCKER_TMPDIR"); tmpDir == "" {
|
|
tmpDir = filepath.Join(rootDir, "tmp")
|
|
}
|
|
return tmpDir, system.MkdirAll(tmpDir, 0700)
|
|
}
|
|
|
|
func (daemon *Daemon) setHostConfig(container *Container, hostConfig *runconfig.HostConfig) error {
|
|
container.Lock()
|
|
if err := parseSecurityOpt(container, hostConfig); err != nil {
|
|
container.Unlock()
|
|
return err
|
|
}
|
|
container.Unlock()
|
|
|
|
// Do not lock while creating volumes since this could be calling out to external plugins
|
|
// Don't want to block other actions, like `docker ps` because we're waiting on an external plugin
|
|
if err := daemon.registerMountPoints(container, hostConfig); err != nil {
|
|
return err
|
|
}
|
|
|
|
container.Lock()
|
|
defer container.Unlock()
|
|
// Register any links from the host config before starting the container
|
|
if err := daemon.RegisterLinks(container, hostConfig); err != nil {
|
|
return err
|
|
}
|
|
|
|
container.hostConfig = hostConfig
|
|
container.toDisk()
|
|
return nil
|
|
}
|
|
|
|
func (daemon *Daemon) newBaseContainer(id string) CommonContainer {
|
|
return CommonContainer{
|
|
ID: id,
|
|
State: NewState(),
|
|
MountPoints: make(map[string]*mountPoint),
|
|
Volumes: make(map[string]string),
|
|
VolumesRW: make(map[string]bool),
|
|
execCommands: newExecStore(),
|
|
root: daemon.containerRoot(id),
|
|
}
|
|
}
|
|
|
|
func setDefaultMtu(config *Config) {
|
|
// do nothing if the config does not have the default 0 value.
|
|
if config.Mtu != 0 {
|
|
return
|
|
}
|
|
config.Mtu = defaultNetworkMtu
|
|
if routeMtu, err := getDefaultRouteMtu(); err == nil {
|
|
config.Mtu = routeMtu
|
|
}
|
|
}
|
|
|
|
var errNoDefaultRoute = errors.New("no default route was found")
|
|
|
|
// getDefaultRouteMtu returns the MTU for the default route's interface.
|
|
func getDefaultRouteMtu() (int, error) {
|
|
routes, err := netlink.NetworkGetRoutes()
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
for _, r := range routes {
|
|
if r.Default {
|
|
return r.Iface.MTU, nil
|
|
}
|
|
}
|
|
return 0, errNoDefaultRoute
|
|
}
|