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Move some container related methods and structs to smaller files 

Signed-off-by: Vincent Demeester <vincent@sbr.pm>
This commit is contained in:
Vincent Demeester 2016-05-24 17:49:26 +02:00
parent ce07eac570
commit fb48bf518b
No known key found for this signature in database
GPG Key ID: 083CC6FD6EB699A3
7 changed files with 279 additions and 258 deletions
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2
daemon/changes.go
View File

@ -11,5 +11,5 @@ func (daemon *Daemon) ContainerChanges(name string) ([]archive.Change, error) {
container.Lock()
defer container.Unlock()
return daemon.changes(container)
return container.RWLayer.Changes()
}

145
daemon/container.go Normal file
View File

@ -0,0 +1,145 @@
package daemon
import (
"fmt"
"path/filepath"
"time"
"github.com/docker/docker/container"
"github.com/docker/docker/daemon/network"
"github.com/docker/docker/errors"
"github.com/docker/docker/image"
"github.com/docker/docker/pkg/truncindex"
containertypes "github.com/docker/engine-api/types/container"
)
// GetContainer looks for a container using the provided information, which could be
// one of the following inputs from the caller:
// - A full container ID, which will exact match a container in daemon's list
// - A container name, which will only exact match via the GetByName() function
// - A partial container ID prefix (e.g. short ID) of any length that is
// unique enough to only return a single container object
// If none of these searches succeed, an error is returned
func (daemon *Daemon) GetContainer(prefixOrName string) (*container.Container, error) {
if len(prefixOrName) == 0 {
return nil, errors.NewBadRequestError(fmt.Errorf("No container name or ID supplied"))
}
if containerByID := daemon.containers.Get(prefixOrName); containerByID != nil {
// prefix is an exact match to a full container ID
return containerByID, nil
}
// GetByName will match only an exact name provided; we ignore errors
if containerByName, _ := daemon.GetByName(prefixOrName); containerByName != nil {
// prefix is an exact match to a full container Name
return containerByName, nil
}
containerID, indexError := daemon.idIndex.Get(prefixOrName)
if indexError != nil {
// When truncindex defines an error type, use that instead
if indexError == truncindex.ErrNotExist {
err := fmt.Errorf("No such container: %s", prefixOrName)
return nil, errors.NewRequestNotFoundError(err)
}
return nil, indexError
}
return daemon.containers.Get(containerID), nil
}
// Exists returns a true if a container of the specified ID or name exists,
// false otherwise.
func (daemon *Daemon) Exists(id string) bool {
c, _ := daemon.GetContainer(id)
return c != nil
}
// IsPaused returns a bool indicating if the specified container is paused.
func (daemon *Daemon) IsPaused(id string) bool {
c, _ := daemon.GetContainer(id)
return c.State.IsPaused()
}
func (daemon *Daemon) containerRoot(id string) string {
return filepath.Join(daemon.repository, id)
}
// Load reads the contents of a container from disk
// This is typically done at startup.
func (daemon *Daemon) load(id string) (*container.Container, error) {
container := daemon.newBaseContainer(id)
if err := container.FromDisk(); err != nil {
return nil, err
}
if container.ID != id {
return container, fmt.Errorf("Container %s is stored at %s", container.ID, id)
}
return container, nil
}
// Register makes a container object usable by the daemon as <container.ID>
func (daemon *Daemon) Register(c *container.Container) error {
// Attach to stdout and stderr
if c.Config.OpenStdin {
c.NewInputPipes()
} else {
c.NewNopInputPipe()
}
daemon.containers.Add(c.ID, c)
daemon.idIndex.Add(c.ID)
return nil
}
func (daemon *Daemon) newContainer(name string, config *containertypes.Config, imgID image.ID) (*container.Container, error) {
var (
id string
err error
noExplicitName = name == ""
)
id, name, err = daemon.generateIDAndName(name)
if err != nil {
return nil, err
}
daemon.generateHostname(id, config)
entrypoint, args := daemon.getEntrypointAndArgs(config.Entrypoint, config.Cmd)
base := daemon.newBaseContainer(id)
base.Created = time.Now().UTC()
base.Path = entrypoint
base.Args = args //FIXME: de-duplicate from config
base.Config = config
base.HostConfig = &containertypes.HostConfig{}
base.ImageID = imgID
base.NetworkSettings = &network.Settings{IsAnonymousEndpoint: noExplicitName}
base.Name = name
base.Driver = daemon.GraphDriverName()
return base, err
}
// GetByName returns a container given a name.
func (daemon *Daemon) GetByName(name string) (*container.Container, error) {
if len(name) == 0 {
return nil, fmt.Errorf("No container name supplied")
}
fullName := name
if name[0] != '/' {
fullName = "/" + name
}
id, err := daemon.nameIndex.Get(fullName)
if err != nil {
return nil, fmt.Errorf("Could not find entity for %s", name)
}
e := daemon.containers.Get(id)
if e == nil {
return nil, fmt.Errorf("Could not find container for entity id %s", id)
}
return e, nil
}

12
daemon/create.go
View File

@ -218,3 +218,15 @@ func (daemon *Daemon) VolumeCreate(name, driverName string, opts, labels map[str
apiV.Mountpoint = v.Path()
return apiV, nil
}
func (daemon *Daemon) mergeAndVerifyConfig(config *containertypes.Config, img *image.Image) error {
if img != nil && img.Config != nil {
if err := merge(config, img.Config); err != nil {
return err
}
}
if len(config.Entrypoint) == 0 && len(config.Cmd) == 0 {
return fmt.Errorf("No command specified")
}
return nil
}

257
daemon/daemon.go
View File

@ -36,7 +36,6 @@ import (
"github.com/docker/engine-api/types/strslice"
// register graph drivers
_ "github.com/docker/docker/daemon/graphdriver/register"
"github.com/docker/docker/daemon/network"
dmetadata "github.com/docker/docker/distribution/metadata"
"github.com/docker/docker/distribution/xfer"
"github.com/docker/docker/dockerversion"
@ -44,16 +43,13 @@ import (
"github.com/docker/docker/layer"
"github.com/docker/docker/libcontainerd"
"github.com/docker/docker/migrate/v1"
"github.com/docker/docker/pkg/archive"
"github.com/docker/docker/pkg/fileutils"
"github.com/docker/docker/pkg/graphdb"
"github.com/docker/docker/pkg/idtools"
"github.com/docker/docker/pkg/namesgenerator"
"github.com/docker/docker/pkg/progress"
"github.com/docker/docker/pkg/registrar"
"github.com/docker/docker/pkg/signal"
"github.com/docker/docker/pkg/streamformatter"
"github.com/docker/docker/pkg/stringid"
"github.com/docker/docker/pkg/sysinfo"
"github.com/docker/docker/pkg/system"
"github.com/docker/docker/pkg/truncindex"
@ -73,9 +69,6 @@ import (
)
var (
validContainerNameChars = utils.RestrictedNameChars
validContainerNamePattern = utils.RestrictedNamePattern
errSystemNotSupported = fmt.Errorf("The Docker daemon is not supported on this platform.")
)
@ -112,110 +105,6 @@ type Daemon struct {
defaultIsolation containertypes.Isolation // Default isolation mode on Windows
}
// GetContainer looks for a container using the provided information, which could be
// one of the following inputs from the caller:
// - A full container ID, which will exact match a container in daemon's list
// - A container name, which will only exact match via the GetByName() function
// - A partial container ID prefix (e.g. short ID) of any length that is
// unique enough to only return a single container object
// If none of these searches succeed, an error is returned
func (daemon *Daemon) GetContainer(prefixOrName string) (*container.Container, error) {
if len(prefixOrName) == 0 {
return nil, errors.NewBadRequestError(fmt.Errorf("No container name or ID supplied"))
}
if containerByID := daemon.containers.Get(prefixOrName); containerByID != nil {
// prefix is an exact match to a full container ID
return containerByID, nil
}
// GetByName will match only an exact name provided; we ignore errors
if containerByName, _ := daemon.GetByName(prefixOrName); containerByName != nil {
// prefix is an exact match to a full container Name
return containerByName, nil
}
containerID, indexError := daemon.idIndex.Get(prefixOrName)
if indexError != nil {
// When truncindex defines an error type, use that instead
if indexError == truncindex.ErrNotExist {
err := fmt.Errorf("No such container: %s", prefixOrName)
return nil, errors.NewRequestNotFoundError(err)
}
return nil, indexError
}
return daemon.containers.Get(containerID), nil
}
// Exists returns a true if a container of the specified ID or name exists,
// false otherwise.
func (daemon *Daemon) Exists(id string) bool {
c, _ := daemon.GetContainer(id)
return c != nil
}
// IsPaused returns a bool indicating if the specified container is paused.
func (daemon *Daemon) IsPaused(id string) bool {
c, _ := daemon.GetContainer(id)
return c.State.IsPaused()
}
func (daemon *Daemon) containerRoot(id string) string {
return filepath.Join(daemon.repository, id)
}
// Load reads the contents of a container from disk
// This is typically done at startup.
func (daemon *Daemon) load(id string) (*container.Container, error) {
container := daemon.newBaseContainer(id)
if err := container.FromDisk(); err != nil {
return nil, err
}
if container.ID != id {
return container, fmt.Errorf("Container %s is stored at %s", container.ID, id)
}
return container, nil
}
func (daemon *Daemon) registerName(container *container.Container) error {
if daemon.Exists(container.ID) {
return fmt.Errorf("Container is already loaded")
}
if err := validateID(container.ID); err != nil {
return err
}
if container.Name == "" {
name, err := daemon.generateNewName(container.ID)
if err != nil {
return err
}
container.Name = name
if err := container.ToDiskLocking(); err != nil {
logrus.Errorf("Error saving container name to disk: %v", err)
}
}
return daemon.nameIndex.Reserve(container.Name, container.ID)
}
// Register makes a container object usable by the daemon as <container.ID>
func (daemon *Daemon) Register(c *container.Container) error {
// Attach to stdout and stderr
if c.Config.OpenStdin {
c.NewInputPipes()
} else {
c.NewNopInputPipe()
}
daemon.containers.Add(c.ID, c)
daemon.idIndex.Add(c.ID)
return nil
}
func (daemon *Daemon) restore() error {
var (
debug = utils.IsDebugEnabled()
@ -431,88 +320,6 @@ func (daemon *Daemon) waitForNetworks(c *container.Container) {
}
}
func (daemon *Daemon) mergeAndVerifyConfig(config *containertypes.Config, img *image.Image) error {
if img != nil && img.Config != nil {
if err := merge(config, img.Config); err != nil {
return err
}
}
if len(config.Entrypoint) == 0 && len(config.Cmd) == 0 {
return fmt.Errorf("No command specified")
}
return nil
}
func (daemon *Daemon) generateIDAndName(name string) (string, string, error) {
var (
err error
id = stringid.GenerateNonCryptoID()
)
if name == "" {
if name, err = daemon.generateNewName(id); err != nil {
return "", "", err
}
return id, name, nil
}
if name, err = daemon.reserveName(id, name); err != nil {
return "", "", err
}
return id, name, nil
}
func (daemon *Daemon) reserveName(id, name string) (string, error) {
if !validContainerNamePattern.MatchString(name) {
return "", fmt.Errorf("Invalid container name (%s), only %s are allowed", name, validContainerNameChars)
}
if name[0] != '/' {
name = "/" + name
}
if err := daemon.nameIndex.Reserve(name, id); err != nil {
if err == registrar.ErrNameReserved {
id, err := daemon.nameIndex.Get(name)
if err != nil {
logrus.Errorf("got unexpected error while looking up reserved name: %v", err)
return "", err
}
return "", fmt.Errorf("Conflict. The name %q is already in use by container %s. You have to remove (or rename) that container to be able to reuse that name.", name, id)
}
return "", fmt.Errorf("error reserving name: %s, error: %v", name, err)
}
return name, nil
}
func (daemon *Daemon) releaseName(name string) {
daemon.nameIndex.Release(name)
}
func (daemon *Daemon) generateNewName(id string) (string, error) {
var name string
for i := 0; i < 6; i++ {
name = namesgenerator.GetRandomName(i)
if name[0] != '/' {
name = "/" + name
}
if err := daemon.nameIndex.Reserve(name, id); err != nil {
if err == registrar.ErrNameReserved {
continue
}
return "", err
}
return name, nil
}
name = "/" + stringid.TruncateID(id)
if err := daemon.nameIndex.Reserve(name, id); err != nil {
return "", err
}
return name, nil
}
func (daemon *Daemon) generateHostname(id string, config *containertypes.Config) {
// Generate default hostname
if config.Hostname == "" {
@ -527,54 +334,6 @@ func (daemon *Daemon) getEntrypointAndArgs(configEntrypoint strslice.StrSlice, c
return configCmd[0], configCmd[1:]
}
func (daemon *Daemon) newContainer(name string, config *containertypes.Config, imgID image.ID) (*container.Container, error) {
var (
id string
err error
noExplicitName = name == ""
)
id, name, err = daemon.generateIDAndName(name)
if err != nil {
return nil, err
}
daemon.generateHostname(id, config)
entrypoint, args := daemon.getEntrypointAndArgs(config.Entrypoint, config.Cmd)
base := daemon.newBaseContainer(id)
base.Created = time.Now().UTC()
base.Path = entrypoint
base.Args = args //FIXME: de-duplicate from config
base.Config = config
base.HostConfig = &containertypes.HostConfig{}
base.ImageID = imgID
base.NetworkSettings = &network.Settings{IsAnonymousEndpoint: noExplicitName}
base.Name = name
base.Driver = daemon.GraphDriverName()
return base, err
}
// GetByName returns a container given a name.
func (daemon *Daemon) GetByName(name string) (*container.Container, error) {
if len(name) == 0 {
return nil, fmt.Errorf("No container name supplied")
}
fullName := name
if name[0] != '/' {
fullName = "/" + name
}
id, err := daemon.nameIndex.Get(fullName)
if err != nil {
return nil, fmt.Errorf("Could not find entity for %s", name)
}
e := daemon.containers.Get(id)
if e == nil {
return nil, fmt.Errorf("Could not find container for entity id %s", id)
}
return e, nil
}
// GetLabels for a container or image id
func (daemon *Daemon) GetLabels(id string) map[string]string {
// TODO: TestCase
@ -947,22 +706,6 @@ func (daemon *Daemon) Unmount(container *container.Container) error {
return nil
}
func (daemon *Daemon) kill(c *container.Container, sig int) error {
return daemon.containerd.Signal(c.ID, sig)
}
func (daemon *Daemon) subscribeToContainerStats(c *container.Container) chan interface{} {
return daemon.statsCollector.collect(c)
}
func (daemon *Daemon) unsubscribeToContainerStats(c *container.Container, ch chan interface{}) {
daemon.statsCollector.unsubscribe(c, ch)
}
func (daemon *Daemon) changes(container *container.Container) ([]archive.Change, error) {
return container.RWLayer.Changes()
}
func writeDistributionProgress(cancelFunc func(), outStream io.Writer, progressChan <-chan progress.Progress) {
progressOutput := streamformatter.NewJSONStreamFormatter().NewProgressOutput(outStream, false)
operationCancelled := false

4
daemon/kill.go
View File

@ -151,3 +151,7 @@ func (daemon *Daemon) killPossiblyDeadProcess(container *container.Container, si
}
return err
}
func (daemon *Daemon) kill(c *container.Container, sig int) error {
return daemon.containerd.Signal(c.ID, sig)
}

108
daemon/names.go Normal file
View File

@ -0,0 +1,108 @@
package daemon
import (
"fmt"
"github.com/Sirupsen/logrus"
"github.com/docker/docker/container"
"github.com/docker/docker/pkg/namesgenerator"
"github.com/docker/docker/pkg/registrar"
"github.com/docker/docker/pkg/stringid"
"github.com/docker/docker/utils"
)
var (
validContainerNameChars = utils.RestrictedNameChars
validContainerNamePattern = utils.RestrictedNamePattern
)
func (daemon *Daemon) registerName(container *container.Container) error {
if daemon.Exists(container.ID) {
return fmt.Errorf("Container is already loaded")
}
if err := validateID(container.ID); err != nil {
return err
}
if container.Name == "" {
name, err := daemon.generateNewName(container.ID)
if err != nil {
return err
}
container.Name = name
if err := container.ToDiskLocking(); err != nil {
logrus.Errorf("Error saving container name to disk: %v", err)
}
}
return daemon.nameIndex.Reserve(container.Name, container.ID)
}
func (daemon *Daemon) generateIDAndName(name string) (string, string, error) {
var (
err error
id = stringid.GenerateNonCryptoID()
)
if name == "" {
if name, err = daemon.generateNewName(id); err != nil {
return "", "", err
}
return id, name, nil
}
if name, err = daemon.reserveName(id, name); err != nil {
return "", "", err
}
return id, name, nil
}
func (daemon *Daemon) reserveName(id, name string) (string, error) {
if !validContainerNamePattern.MatchString(name) {
return "", fmt.Errorf("Invalid container name (%s), only %s are allowed", name, validContainerNameChars)
}
if name[0] != '/' {
name = "/" + name
}
if err := daemon.nameIndex.Reserve(name, id); err != nil {
if err == registrar.ErrNameReserved {
id, err := daemon.nameIndex.Get(name)
if err != nil {
logrus.Errorf("got unexpected error while looking up reserved name: %v", err)
return "", err
}
return "", fmt.Errorf("Conflict. The name %q is already in use by container %s. You have to remove (or rename) that container to be able to reuse that name.", name, id)
}
return "", fmt.Errorf("error reserving name: %s, error: %v", name, err)
}
return name, nil
}
func (daemon *Daemon) releaseName(name string) {
daemon.nameIndex.Release(name)
}
func (daemon *Daemon) generateNewName(id string) (string, error) {
var name string
for i := 0; i < 6; i++ {
name = namesgenerator.GetRandomName(i)
if name[0] != '/' {
name = "/" + name
}
if err := daemon.nameIndex.Reserve(name, id); err != nil {
if err == registrar.ErrNameReserved {
continue
}
return "", err
}
return name, nil
}
name = "/" + stringid.TruncateID(id)
if err := daemon.nameIndex.Reserve(name, id); err != nil {
return "", err
}
return name, nil
}

9
daemon/stats.go
View File

@ -8,6 +8,7 @@ import (
"golang.org/x/net/context"
"github.com/docker/docker/api/types/backend"
"github.com/docker/docker/container"
"github.com/docker/docker/pkg/ioutils"
"github.com/docker/engine-api/types"
"github.com/docker/engine-api/types/versions"
@ -121,3 +122,11 @@ func (daemon *Daemon) ContainerStats(ctx context.Context, prefixOrName string, c
}
}
}
func (daemon *Daemon) subscribeToContainerStats(c *container.Container) chan interface{} {
return daemon.statsCollector.collect(c)
}
func (daemon *Daemon) unsubscribeToContainerStats(c *container.Container, ch chan interface{}) {
daemon.statsCollector.unsubscribe(c, ch)
}