1151 lines
37 KiB
Go
1151 lines
37 KiB
Go
// Package daemon exposes the functions that occur on the host server
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// that the Docker daemon is running.
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//
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// In implementing the various functions of the daemon, there is often
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// a method-specific struct for configuring the runtime behavior.
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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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"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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containerd "github.com/docker/containerd/api/grpc/types"
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"github.com/docker/docker/api"
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"github.com/docker/docker/api/types"
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containertypes "github.com/docker/docker/api/types/container"
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"github.com/docker/docker/container"
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"github.com/docker/docker/daemon/config"
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"github.com/docker/docker/daemon/discovery"
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"github.com/docker/docker/daemon/events"
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"github.com/docker/docker/daemon/exec"
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"github.com/docker/docker/daemon/logger"
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// register graph drivers
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_ "github.com/docker/docker/daemon/graphdriver/register"
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"github.com/docker/docker/daemon/initlayer"
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"github.com/docker/docker/daemon/stats"
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dmetadata "github.com/docker/docker/distribution/metadata"
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"github.com/docker/docker/distribution/xfer"
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"github.com/docker/docker/dockerversion"
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"github.com/docker/docker/image"
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"github.com/docker/docker/layer"
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"github.com/docker/docker/libcontainerd"
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"github.com/docker/docker/migrate/v1"
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"github.com/docker/docker/pkg/fileutils"
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"github.com/docker/docker/pkg/idtools"
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"github.com/docker/docker/pkg/plugingetter"
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"github.com/docker/docker/pkg/registrar"
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"github.com/docker/docker/pkg/signal"
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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/plugin"
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refstore "github.com/docker/docker/reference"
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"github.com/docker/docker/registry"
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"github.com/docker/docker/runconfig"
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volumedrivers "github.com/docker/docker/volume/drivers"
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"github.com/docker/docker/volume/local"
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"github.com/docker/docker/volume/store"
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"github.com/docker/libnetwork"
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"github.com/docker/libnetwork/cluster"
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nwconfig "github.com/docker/libnetwork/config"
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"github.com/docker/libtrust"
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"github.com/pkg/errors"
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)
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var (
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// DefaultRuntimeBinary is the default runtime to be used by
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// containerd if none is specified
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DefaultRuntimeBinary = "docker-runc"
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errSystemNotSupported = errors.New("The Docker daemon is not supported on this platform.")
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)
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// Daemon holds information about the Docker daemon.
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type Daemon struct {
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ID string
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repository string
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containers container.Store
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execCommands *exec.Store
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referenceStore refstore.Store
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downloadManager *xfer.LayerDownloadManager
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uploadManager *xfer.LayerUploadManager
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distributionMetadataStore dmetadata.Store
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trustKey libtrust.PrivateKey
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idIndex *truncindex.TruncIndex
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configStore *config.Config
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statsCollector *stats.Collector
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defaultLogConfig containertypes.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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volumes *store.VolumeStore
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discoveryWatcher discovery.Reloader
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root string
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seccompEnabled bool
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apparmorEnabled bool
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shutdown bool
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uidMaps []idtools.IDMap
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gidMaps []idtools.IDMap
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layerStore layer.Store
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imageStore image.Store
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PluginStore *plugin.Store // todo: remove
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pluginManager *plugin.Manager
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nameIndex *registrar.Registrar
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linkIndex *linkIndex
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containerd libcontainerd.Client
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containerdRemote libcontainerd.Remote
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defaultIsolation containertypes.Isolation // Default isolation mode on Windows
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clusterProvider cluster.Provider
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cluster Cluster
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machineMemory uint64
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seccompProfile []byte
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seccompProfilePath string
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}
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// HasExperimental returns whether the experimental features of the daemon are enabled or not
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func (daemon *Daemon) HasExperimental() bool {
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if daemon.configStore != nil && daemon.configStore.Experimental {
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return true
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}
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return false
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}
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func (daemon *Daemon) restore() error {
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var (
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currentDriver = daemon.GraphDriverName()
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containers = make(map[string]*container.Container)
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)
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logrus.Info("Loading containers: start.")
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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 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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rwlayer, err := daemon.layerStore.GetRWLayer(container.ID)
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if err != nil {
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logrus.Errorf("Failed to load container mount %v: %v", id, err)
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continue
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}
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container.RWLayer = rwlayer
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logrus.Debugf("Loaded container %v", container.ID)
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containers[container.ID] = 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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removeContainers := make(map[string]*container.Container)
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restartContainers := make(map[*container.Container]chan struct{})
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activeSandboxes := make(map[string]interface{})
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for id, c := range containers {
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if err := daemon.registerName(c); err != nil {
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logrus.Errorf("Failed to register container %s: %s", c.ID, err)
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delete(containers, id)
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continue
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}
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daemon.Register(c)
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// verify that all volumes valid and have been migrated from the pre-1.7 layout
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if err := daemon.verifyVolumesInfo(c); err != nil {
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// don't skip the container due to error
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logrus.Errorf("Failed to verify volumes for container '%s': %v", c.ID, err)
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}
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// The LogConfig.Type is empty if the container was created before docker 1.12 with default log driver.
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// We should rewrite it to use the daemon defaults.
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// Fixes https://github.com/docker/docker/issues/22536
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if c.HostConfig.LogConfig.Type == "" {
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if err := daemon.mergeAndVerifyLogConfig(&c.HostConfig.LogConfig); err != nil {
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logrus.Errorf("Failed to verify log config for container %s: %q", c.ID, err)
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continue
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}
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}
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}
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var wg sync.WaitGroup
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var mapLock sync.Mutex
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for _, c := range containers {
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wg.Add(1)
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go func(c *container.Container) {
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defer wg.Done()
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if err := backportMountSpec(c); err != nil {
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logrus.Error("Failed to migrate old mounts to use new spec format")
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}
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if c.IsRunning() || c.IsPaused() {
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c.RestartManager().Cancel() // manually start containers because some need to wait for swarm networking
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if err := daemon.containerd.Restore(c.ID, c.InitializeStdio); err != nil {
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logrus.Errorf("Failed to restore %s with containerd: %s", c.ID, err)
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return
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}
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// we call Mount and then Unmount to get BaseFs of the container
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if err := daemon.Mount(c); err != nil {
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// The mount is unlikely to fail. However, in case mount fails
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// the container should be allowed to restore here. Some functionalities
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// (like docker exec -u user) might be missing but container is able to be
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// stopped/restarted/removed.
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// See #29365 for related information.
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// The error is only logged here.
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logrus.Warnf("Failed to mount container on getting BaseFs path %v: %v", c.ID, err)
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} else {
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// if mount success, then unmount it
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if err := daemon.Unmount(c); err != nil {
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logrus.Warnf("Failed to umount container on getting BaseFs path %v: %v", c.ID, err)
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}
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}
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c.ResetRestartManager(false)
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if !c.HostConfig.NetworkMode.IsContainer() && c.IsRunning() {
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options, err := daemon.buildSandboxOptions(c)
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if err != nil {
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logrus.Warnf("Failed build sandbox option to restore container %s: %v", c.ID, err)
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}
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mapLock.Lock()
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activeSandboxes[c.NetworkSettings.SandboxID] = options
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mapLock.Unlock()
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}
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}
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// fixme: only if not running
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// get list of containers we need to restart
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if !c.IsRunning() && !c.IsPaused() {
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// Do not autostart containers which
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// has endpoints in a swarm scope
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// network yet since the cluster is
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// not initialized yet. We will start
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// it after the cluster is
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// initialized.
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if daemon.configStore.AutoRestart && c.ShouldRestart() && !c.NetworkSettings.HasSwarmEndpoint {
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mapLock.Lock()
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restartContainers[c] = make(chan struct{})
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mapLock.Unlock()
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} else if c.HostConfig != nil && c.HostConfig.AutoRemove {
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mapLock.Lock()
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removeContainers[c.ID] = c
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mapLock.Unlock()
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}
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}
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if c.RemovalInProgress {
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// We probably crashed in the middle of a removal, reset
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// the flag.
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//
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// We DO NOT remove the container here as we do not
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// know if the user had requested for either the
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// associated volumes, network links or both to also
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// be removed. So we put the container in the "dead"
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// state and leave further processing up to them.
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logrus.Debugf("Resetting RemovalInProgress flag from %v", c.ID)
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c.ResetRemovalInProgress()
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c.SetDead()
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c.ToDisk()
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}
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}(c)
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}
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wg.Wait()
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daemon.netController, err = daemon.initNetworkController(daemon.configStore, activeSandboxes)
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if err != nil {
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return fmt.Errorf("Error initializing network controller: %v", err)
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}
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// Now that all the containers are registered, register the links
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for _, c := range containers {
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if err := daemon.registerLinks(c, c.HostConfig); err != nil {
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logrus.Errorf("failed to register link for container %s: %v", c.ID, err)
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}
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}
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group := sync.WaitGroup{}
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for c, notifier := range restartContainers {
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group.Add(1)
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go func(c *container.Container, chNotify chan struct{}) {
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defer group.Done()
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logrus.Debugf("Starting container %s", c.ID)
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// ignore errors here as this is a best effort to wait for children to be
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// running before we try to start the container
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children := daemon.children(c)
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timeout := time.After(5 * time.Second)
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for _, child := range children {
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if notifier, exists := restartContainers[child]; exists {
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select {
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case <-notifier:
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case <-timeout:
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}
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}
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}
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// Make sure networks are available before starting
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daemon.waitForNetworks(c)
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if err := daemon.containerStart(c, "", "", true); err != nil {
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logrus.Errorf("Failed to start container %s: %s", c.ID, err)
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}
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close(chNotify)
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}(c, notifier)
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}
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group.Wait()
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removeGroup := sync.WaitGroup{}
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for id := range removeContainers {
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removeGroup.Add(1)
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go func(cid string) {
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if err := daemon.ContainerRm(cid, &types.ContainerRmConfig{ForceRemove: true, RemoveVolume: true}); err != nil {
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logrus.Errorf("Failed to remove container %s: %s", cid, err)
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}
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removeGroup.Done()
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}(id)
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}
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removeGroup.Wait()
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// any containers that were started above would already have had this done,
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// however we need to now prepare the mountpoints for the rest of the containers as well.
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// This shouldn't cause any issue running on the containers that already had this run.
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// This must be run after any containers with a restart policy so that containerized plugins
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// can have a chance to be running before we try to initialize them.
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for _, c := range containers {
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// if the container has restart policy, do not
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// prepare the mountpoints since it has been done on restarting.
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// This is to speed up the daemon start when a restart container
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// has a volume and the volume driver is not available.
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if _, ok := restartContainers[c]; ok {
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continue
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} else if _, ok := removeContainers[c.ID]; ok {
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// container is automatically removed, skip it.
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continue
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}
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group.Add(1)
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go func(c *container.Container) {
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defer group.Done()
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if err := daemon.prepareMountPoints(c); err != nil {
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logrus.Error(err)
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}
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}(c)
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}
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group.Wait()
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logrus.Info("Loading containers: done.")
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return nil
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}
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// RestartSwarmContainers restarts any autostart container which has a
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// swarm endpoint.
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func (daemon *Daemon) RestartSwarmContainers() {
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group := sync.WaitGroup{}
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for _, c := range daemon.List() {
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if !c.IsRunning() && !c.IsPaused() {
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// Autostart all the containers which has a
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// swarm endpoint now that the cluster is
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// initialized.
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if daemon.configStore.AutoRestart && c.ShouldRestart() && c.NetworkSettings.HasSwarmEndpoint {
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group.Add(1)
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go func(c *container.Container) {
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defer group.Done()
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if err := daemon.containerStart(c, "", "", true); err != nil {
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logrus.Error(err)
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}
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}(c)
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}
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}
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}
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group.Wait()
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}
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// waitForNetworks is used during daemon initialization when starting up containers
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// It ensures that all of a container's networks are available before the daemon tries to start the container.
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// In practice it just makes sure the discovery service is available for containers which use a network that require discovery.
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func (daemon *Daemon) waitForNetworks(c *container.Container) {
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if daemon.discoveryWatcher == nil {
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return
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}
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// Make sure if the container has a network that requires discovery that the discovery service is available before starting
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for netName := range c.NetworkSettings.Networks {
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// If we get `ErrNoSuchNetwork` here, we can assume that it is due to discovery not being ready
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// Most likely this is because the K/V store used for discovery is in a container and needs to be started
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if _, err := daemon.netController.NetworkByName(netName); err != nil {
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if _, ok := err.(libnetwork.ErrNoSuchNetwork); !ok {
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continue
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}
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// use a longish timeout here due to some slowdowns in libnetwork if the k/v store is on anything other than --net=host
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// FIXME: why is this slow???
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logrus.Debugf("Container %s waiting for network to be ready", c.Name)
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select {
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case <-daemon.discoveryWatcher.ReadyCh():
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case <-time.After(60 * time.Second):
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}
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return
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}
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}
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}
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func (daemon *Daemon) children(c *container.Container) map[string]*container.Container {
|
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return daemon.linkIndex.children(c)
|
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}
|
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|
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// parents returns the names of the parent containers of the container
|
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// with the given name.
|
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func (daemon *Daemon) parents(c *container.Container) map[string]*container.Container {
|
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return daemon.linkIndex.parents(c)
|
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}
|
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|
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func (daemon *Daemon) registerLink(parent, child *container.Container, alias string) error {
|
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fullName := path.Join(parent.Name, alias)
|
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if err := daemon.nameIndex.Reserve(fullName, child.ID); err != nil {
|
|
if err == registrar.ErrNameReserved {
|
|
logrus.Warnf("error registering link for %s, to %s, as alias %s, ignoring: %v", parent.ID, child.ID, alias, err)
|
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return nil
|
|
}
|
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return err
|
|
}
|
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daemon.linkIndex.link(parent, child, fullName)
|
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return nil
|
|
}
|
|
|
|
// DaemonJoinsCluster informs the daemon has joined the cluster and provides
|
|
// the handler to query the cluster component
|
|
func (daemon *Daemon) DaemonJoinsCluster(clusterProvider cluster.Provider) {
|
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daemon.setClusterProvider(clusterProvider)
|
|
}
|
|
|
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// DaemonLeavesCluster informs the daemon has left the cluster
|
|
func (daemon *Daemon) DaemonLeavesCluster() {
|
|
// Daemon is in charge of removing the attachable networks with
|
|
// connected containers when the node leaves the swarm
|
|
daemon.clearAttachableNetworks()
|
|
// We no longer need the cluster provider, stop it now so that
|
|
// the network agent will stop listening to cluster events.
|
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daemon.setClusterProvider(nil)
|
|
// Wait for the networking cluster agent to stop
|
|
daemon.netController.AgentStopWait()
|
|
// Daemon is in charge of removing the ingress network when the
|
|
// node leaves the swarm. Wait for job to be done or timeout.
|
|
// This is called also on graceful daemon shutdown. We need to
|
|
// wait, because the ingress release has to happen before the
|
|
// network controller is stopped.
|
|
if done, err := daemon.ReleaseIngress(); err == nil {
|
|
select {
|
|
case <-done:
|
|
case <-time.After(5 * time.Second):
|
|
logrus.Warnf("timeout while waiting for ingress network removal")
|
|
}
|
|
} else {
|
|
logrus.Warnf("failed to initiate ingress network removal: %v", err)
|
|
}
|
|
}
|
|
|
|
// setClusterProvider sets a component for querying the current cluster state.
|
|
func (daemon *Daemon) setClusterProvider(clusterProvider cluster.Provider) {
|
|
daemon.clusterProvider = clusterProvider
|
|
daemon.netController.SetClusterProvider(clusterProvider)
|
|
}
|
|
|
|
// IsSwarmCompatible verifies if the current daemon
|
|
// configuration is compatible with the swarm mode
|
|
func (daemon *Daemon) IsSwarmCompatible() error {
|
|
if daemon.configStore == nil {
|
|
return nil
|
|
}
|
|
return daemon.configStore.IsSwarmCompatible()
|
|
}
|
|
|
|
// NewDaemon sets up everything for the daemon to be able to service
|
|
// requests from the webserver.
|
|
func NewDaemon(config *config.Config, registryService registry.Service, containerdRemote libcontainerd.Remote, pluginStore *plugin.Store) (daemon *Daemon, err error) {
|
|
setDefaultMtu(config)
|
|
|
|
// Ensure that we have a correct root key limit for launching containers.
|
|
if err := ModifyRootKeyLimit(); err != nil {
|
|
logrus.Warnf("unable to modify root key limit, number of containers could be limited by this quota: %v", err)
|
|
}
|
|
|
|
// Ensure we have compatible and valid configuration options
|
|
if err := verifyDaemonSettings(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 !platformSupported {
|
|
return nil, errSystemNotSupported
|
|
}
|
|
|
|
// Validate platform-specific requirements
|
|
if err := checkSystem(); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
uidMaps, gidMaps, err := setupRemappedRoot(config)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
rootUID, rootGID, err := idtools.GetRootUIDGID(uidMaps, gidMaps)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
if err := setupDaemonProcess(config); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// set up the tmpDir to use a canonical path
|
|
tmp, err := prepareTempDir(config.Root, rootUID, rootGID)
|
|
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)
|
|
|
|
d := &Daemon{configStore: config}
|
|
// Ensure the daemon is properly shutdown if there is a failure during
|
|
// initialization
|
|
defer func() {
|
|
if err != nil {
|
|
if err := d.Shutdown(); err != nil {
|
|
logrus.Error(err)
|
|
}
|
|
}
|
|
}()
|
|
|
|
// set up SIGUSR1 handler on Unix-like systems, or a Win32 global event
|
|
// on Windows to dump Go routine stacks
|
|
stackDumpDir := config.Root
|
|
if execRoot := config.GetExecRoot(); execRoot != "" {
|
|
stackDumpDir = execRoot
|
|
}
|
|
d.setupDumpStackTrap(stackDumpDir)
|
|
|
|
if err := d.setupSeccompProfile(); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// Set the default isolation mode (only applicable on Windows)
|
|
if err := d.setDefaultIsolation(); err != nil {
|
|
return nil, fmt.Errorf("error setting default isolation mode: %v", err)
|
|
}
|
|
|
|
logrus.Debugf("Using default logging driver %s", config.LogConfig.Type)
|
|
|
|
if err := configureMaxThreads(config); err != nil {
|
|
logrus.Warnf("Failed to configure golang's threads limit: %v", err)
|
|
}
|
|
|
|
if err := ensureDefaultAppArmorProfile(); err != nil {
|
|
logrus.Errorf(err.Error())
|
|
}
|
|
|
|
daemonRepo := filepath.Join(config.Root, "containers")
|
|
if err := idtools.MkdirAllAs(daemonRepo, 0700, rootUID, rootGID); err != nil && !os.IsExist(err) {
|
|
return nil, err
|
|
}
|
|
|
|
if runtime.GOOS == "windows" {
|
|
if err := system.MkdirAll(filepath.Join(config.Root, "credentialspecs"), 0); err != nil && !os.IsExist(err) {
|
|
return nil, err
|
|
}
|
|
}
|
|
|
|
driverName := os.Getenv("DOCKER_DRIVER")
|
|
if driverName == "" {
|
|
driverName = config.GraphDriver
|
|
}
|
|
|
|
d.RegistryService = registryService
|
|
d.PluginStore = pluginStore
|
|
logger.RegisterPluginGetter(d.PluginStore)
|
|
|
|
// Plugin system initialization should happen before restore. Do not change order.
|
|
d.pluginManager, err = plugin.NewManager(plugin.ManagerConfig{
|
|
Root: filepath.Join(config.Root, "plugins"),
|
|
ExecRoot: getPluginExecRoot(config.Root),
|
|
Store: d.PluginStore,
|
|
Executor: containerdRemote,
|
|
RegistryService: registryService,
|
|
LiveRestoreEnabled: config.LiveRestoreEnabled,
|
|
LogPluginEvent: d.LogPluginEvent, // todo: make private
|
|
AuthzMiddleware: config.AuthzMiddleware,
|
|
})
|
|
if err != nil {
|
|
return nil, errors.Wrap(err, "couldn't create plugin manager")
|
|
}
|
|
|
|
d.layerStore, err = layer.NewStoreFromOptions(layer.StoreOptions{
|
|
StorePath: config.Root,
|
|
MetadataStorePathTemplate: filepath.Join(config.Root, "image", "%s", "layerdb"),
|
|
GraphDriver: driverName,
|
|
GraphDriverOptions: config.GraphOptions,
|
|
UIDMaps: uidMaps,
|
|
GIDMaps: gidMaps,
|
|
PluginGetter: d.PluginStore,
|
|
ExperimentalEnabled: config.Experimental,
|
|
})
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
graphDriver := d.layerStore.DriverName()
|
|
imageRoot := filepath.Join(config.Root, "image", graphDriver)
|
|
|
|
// Configure and validate the kernels security support
|
|
if err := configureKernelSecuritySupport(config, graphDriver); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
logrus.Debugf("Max Concurrent Downloads: %d", *config.MaxConcurrentDownloads)
|
|
d.downloadManager = xfer.NewLayerDownloadManager(d.layerStore, *config.MaxConcurrentDownloads)
|
|
logrus.Debugf("Max Concurrent Uploads: %d", *config.MaxConcurrentUploads)
|
|
d.uploadManager = xfer.NewLayerUploadManager(*config.MaxConcurrentUploads)
|
|
|
|
ifs, err := image.NewFSStoreBackend(filepath.Join(imageRoot, "imagedb"))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
d.imageStore, err = image.NewImageStore(ifs, d.layerStore)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// Configure the volumes driver
|
|
volStore, err := d.configureVolumes(rootUID, rootGID)
|
|
if 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 {
|
|
return nil, err
|
|
}
|
|
|
|
distributionMetadataStore, err := dmetadata.NewFSMetadataStore(filepath.Join(imageRoot, "distribution"))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
eventsService := events.New()
|
|
|
|
referenceStore, err := refstore.NewReferenceStore(filepath.Join(imageRoot, "repositories.json"))
|
|
if err != nil {
|
|
return nil, fmt.Errorf("Couldn't create Tag store repositories: %s", err)
|
|
}
|
|
|
|
migrationStart := time.Now()
|
|
if err := v1.Migrate(config.Root, graphDriver, d.layerStore, d.imageStore, referenceStore, distributionMetadataStore); err != nil {
|
|
logrus.Errorf("Graph migration failed: %q. Your old graph data was found to be too inconsistent for upgrading to content-addressable storage. Some of the old data was probably not upgraded. We recommend starting over with a clean storage directory if possible.", err)
|
|
}
|
|
logrus.Infof("Graph migration to content-addressability took %.2f seconds", time.Since(migrationStart).Seconds())
|
|
|
|
// Discovery is only enabled when the daemon is launched with an address to advertise. When
|
|
// initialized, the daemon is registered and we can store the discovery backend as it's read-only
|
|
if err := d.initDiscovery(config); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
sysInfo := sysinfo.New(false)
|
|
// Check if Devices cgroup is mounted, it is hard requirement for container security,
|
|
// on Linux.
|
|
if runtime.GOOS == "linux" && !sysInfo.CgroupDevicesEnabled {
|
|
return nil, errors.New("Devices cgroup isn't mounted")
|
|
}
|
|
|
|
d.ID = trustKey.PublicKey().KeyID()
|
|
d.repository = daemonRepo
|
|
d.containers = container.NewMemoryStore()
|
|
d.execCommands = exec.NewStore()
|
|
d.referenceStore = referenceStore
|
|
d.distributionMetadataStore = distributionMetadataStore
|
|
d.trustKey = trustKey
|
|
d.idIndex = truncindex.NewTruncIndex([]string{})
|
|
d.statsCollector = d.newStatsCollector(1 * time.Second)
|
|
d.defaultLogConfig = containertypes.LogConfig{
|
|
Type: config.LogConfig.Type,
|
|
Config: config.LogConfig.Config,
|
|
}
|
|
d.EventsService = eventsService
|
|
d.volumes = volStore
|
|
d.root = config.Root
|
|
d.uidMaps = uidMaps
|
|
d.gidMaps = gidMaps
|
|
d.seccompEnabled = sysInfo.Seccomp
|
|
d.apparmorEnabled = sysInfo.AppArmor
|
|
|
|
d.nameIndex = registrar.NewRegistrar()
|
|
d.linkIndex = newLinkIndex()
|
|
d.containerdRemote = containerdRemote
|
|
|
|
go d.execCommandGC()
|
|
|
|
d.containerd, err = containerdRemote.Client(d)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
if err := d.restore(); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// FIXME: this method never returns an error
|
|
info, _ := d.SystemInfo()
|
|
|
|
engineVersion.WithValues(
|
|
dockerversion.Version,
|
|
dockerversion.GitCommit,
|
|
info.Architecture,
|
|
info.Driver,
|
|
info.KernelVersion,
|
|
info.OperatingSystem,
|
|
).Set(1)
|
|
engineCpus.Set(float64(info.NCPU))
|
|
engineMemory.Set(float64(info.MemTotal))
|
|
|
|
return d, nil
|
|
}
|
|
|
|
func (daemon *Daemon) shutdownContainer(c *container.Container) error {
|
|
stopTimeout := c.StopTimeout()
|
|
// TODO(windows): Handle docker restart with paused containers
|
|
if c.IsPaused() {
|
|
// To terminate a process in freezer cgroup, we should send
|
|
// SIGTERM to this process then unfreeze it, and the process will
|
|
// force to terminate immediately.
|
|
logrus.Debugf("Found container %s is paused, sending SIGTERM before unpausing it", c.ID)
|
|
sig, ok := signal.SignalMap["TERM"]
|
|
if !ok {
|
|
return errors.New("System does not support SIGTERM")
|
|
}
|
|
if err := daemon.kill(c, int(sig)); err != nil {
|
|
return fmt.Errorf("sending SIGTERM to container %s with error: %v", c.ID, err)
|
|
}
|
|
if err := daemon.containerUnpause(c); err != nil {
|
|
return fmt.Errorf("Failed to unpause container %s with error: %v", c.ID, err)
|
|
}
|
|
if _, err := c.WaitStop(time.Duration(stopTimeout) * time.Second); err != nil {
|
|
logrus.Debugf("container %s failed to exit in %d second of SIGTERM, sending SIGKILL to force", c.ID, stopTimeout)
|
|
sig, ok := signal.SignalMap["KILL"]
|
|
if !ok {
|
|
return errors.New("System does not support SIGKILL")
|
|
}
|
|
if err := daemon.kill(c, int(sig)); err != nil {
|
|
logrus.Errorf("Failed to SIGKILL container %s", c.ID)
|
|
}
|
|
c.WaitStop(-1 * time.Second)
|
|
return err
|
|
}
|
|
}
|
|
// If container failed to exit in stopTimeout seconds of SIGTERM, then using the force
|
|
if err := daemon.containerStop(c, stopTimeout); err != nil {
|
|
return fmt.Errorf("Failed to stop container %s with error: %v", c.ID, err)
|
|
}
|
|
|
|
c.WaitStop(-1 * time.Second)
|
|
return nil
|
|
}
|
|
|
|
// ShutdownTimeout returns the shutdown timeout based on the max stopTimeout of the containers,
|
|
// and is limited by daemon's ShutdownTimeout.
|
|
func (daemon *Daemon) ShutdownTimeout() int {
|
|
// By default we use daemon's ShutdownTimeout.
|
|
shutdownTimeout := daemon.configStore.ShutdownTimeout
|
|
|
|
graceTimeout := 5
|
|
if daemon.containers != nil {
|
|
for _, c := range daemon.containers.List() {
|
|
if shutdownTimeout >= 0 {
|
|
stopTimeout := c.StopTimeout()
|
|
if stopTimeout < 0 {
|
|
shutdownTimeout = -1
|
|
} else {
|
|
if stopTimeout+graceTimeout > shutdownTimeout {
|
|
shutdownTimeout = stopTimeout + graceTimeout
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return shutdownTimeout
|
|
}
|
|
|
|
// Shutdown stops the daemon.
|
|
func (daemon *Daemon) Shutdown() error {
|
|
daemon.shutdown = true
|
|
// Keep mounts and networking running on daemon shutdown if
|
|
// we are to keep containers running and restore them.
|
|
|
|
if daemon.configStore.LiveRestoreEnabled && daemon.containers != nil {
|
|
// check if there are any running containers, if none we should do some cleanup
|
|
if ls, err := daemon.Containers(&types.ContainerListOptions{}); len(ls) != 0 || err != nil {
|
|
return nil
|
|
}
|
|
}
|
|
|
|
if daemon.containers != nil {
|
|
logrus.Debugf("start clean shutdown of all containers with a %d seconds timeout...", daemon.configStore.ShutdownTimeout)
|
|
daemon.containers.ApplyAll(func(c *container.Container) {
|
|
if !c.IsRunning() {
|
|
return
|
|
}
|
|
logrus.Debugf("stopping %s", c.ID)
|
|
if err := daemon.shutdownContainer(c); err != nil {
|
|
logrus.Errorf("Stop container error: %v", err)
|
|
return
|
|
}
|
|
if mountid, err := daemon.layerStore.GetMountID(c.ID); err == nil {
|
|
daemon.cleanupMountsByID(mountid)
|
|
}
|
|
logrus.Debugf("container stopped %s", c.ID)
|
|
})
|
|
}
|
|
|
|
if daemon.volumes != nil {
|
|
if err := daemon.volumes.Shutdown(); err != nil {
|
|
logrus.Errorf("Error shutting down volume store: %v", err)
|
|
}
|
|
}
|
|
|
|
if daemon.layerStore != nil {
|
|
if err := daemon.layerStore.Cleanup(); err != nil {
|
|
logrus.Errorf("Error during layer Store.Cleanup(): %v", err)
|
|
}
|
|
}
|
|
|
|
// If we are part of a cluster, clean up cluster's stuff
|
|
if daemon.clusterProvider != nil {
|
|
logrus.Debugf("start clean shutdown of cluster resources...")
|
|
daemon.DaemonLeavesCluster()
|
|
}
|
|
|
|
// Shutdown plugins after containers and layerstore. Don't change the order.
|
|
daemon.pluginShutdown()
|
|
|
|
// trigger libnetwork Stop only if it's initialized
|
|
if daemon.netController != nil {
|
|
daemon.netController.Stop()
|
|
}
|
|
|
|
if err := daemon.cleanupMounts(); err != nil {
|
|
return err
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// Mount sets container.BaseFS
|
|
// (is it not set coming in? why is it unset?)
|
|
func (daemon *Daemon) Mount(container *container.Container) error {
|
|
dir, err := container.RWLayer.Mount(container.GetMountLabel())
|
|
if err != nil {
|
|
return err
|
|
}
|
|
logrus.Debugf("container mounted via layerStore: %v", dir)
|
|
|
|
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.Unmount(container)
|
|
return fmt.Errorf("Error: driver %s is returning inconsistent paths for container %s ('%s' then '%s')",
|
|
daemon.GraphDriverName(), container.ID, container.BaseFS, dir)
|
|
}
|
|
}
|
|
container.BaseFS = dir // TODO: combine these fields
|
|
return nil
|
|
}
|
|
|
|
// Unmount unsets the container base filesystem
|
|
func (daemon *Daemon) Unmount(container *container.Container) error {
|
|
if err := container.RWLayer.Unmount(); err != nil {
|
|
logrus.Errorf("Error unmounting container %s: %s", container.ID, err)
|
|
return err
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// Subnets return the IPv4 and IPv6 subnets of networks that are manager by Docker.
|
|
func (daemon *Daemon) Subnets() ([]net.IPNet, []net.IPNet) {
|
|
var v4Subnets []net.IPNet
|
|
var v6Subnets []net.IPNet
|
|
|
|
managedNetworks := daemon.netController.Networks()
|
|
|
|
for _, managedNetwork := range managedNetworks {
|
|
v4infos, v6infos := managedNetwork.Info().IpamInfo()
|
|
for _, info := range v4infos {
|
|
if info.IPAMData.Pool != nil {
|
|
v4Subnets = append(v4Subnets, *info.IPAMData.Pool)
|
|
}
|
|
}
|
|
for _, info := range v6infos {
|
|
if info.IPAMData.Pool != nil {
|
|
v6Subnets = append(v6Subnets, *info.IPAMData.Pool)
|
|
}
|
|
}
|
|
}
|
|
|
|
return v4Subnets, v6Subnets
|
|
}
|
|
|
|
// GraphDriverName returns the name of the graph driver used by the layer.Store
|
|
func (daemon *Daemon) GraphDriverName() string {
|
|
return daemon.layerStore.DriverName()
|
|
}
|
|
|
|
// GetUIDGIDMaps returns the current daemon's user namespace settings
|
|
// for the full uid and gid maps which will be applied to containers
|
|
// started in this instance.
|
|
func (daemon *Daemon) GetUIDGIDMaps() ([]idtools.IDMap, []idtools.IDMap) {
|
|
return daemon.uidMaps, daemon.gidMaps
|
|
}
|
|
|
|
// GetRemappedUIDGID returns the current daemon's uid and gid values
|
|
// if user namespaces are in use for this daemon instance. If not
|
|
// this function will return "real" root values of 0, 0.
|
|
func (daemon *Daemon) GetRemappedUIDGID() (int, int) {
|
|
uid, gid, _ := idtools.GetRootUIDGID(daemon.uidMaps, daemon.gidMaps)
|
|
return uid, gid
|
|
}
|
|
|
|
// prepareTempDir prepares and returns the default directory to use
|
|
// for temporary files.
|
|
// If it doesn't exist, it is created. If it exists, its content is removed.
|
|
func prepareTempDir(rootDir string, rootUID, rootGID int) (string, error) {
|
|
var tmpDir string
|
|
if tmpDir = os.Getenv("DOCKER_TMPDIR"); tmpDir == "" {
|
|
tmpDir = filepath.Join(rootDir, "tmp")
|
|
newName := tmpDir + "-old"
|
|
if err := os.Rename(tmpDir, newName); err == nil {
|
|
go func() {
|
|
if err := os.RemoveAll(newName); err != nil {
|
|
logrus.Warnf("failed to delete old tmp directory: %s", newName)
|
|
}
|
|
}()
|
|
} else {
|
|
logrus.Warnf("failed to rename %s for background deletion: %s. Deleting synchronously", tmpDir, err)
|
|
if err := os.RemoveAll(tmpDir); err != nil {
|
|
logrus.Warnf("failed to delete old tmp directory: %s", tmpDir)
|
|
}
|
|
}
|
|
}
|
|
// We don't remove the content of tmpdir if it's not the default,
|
|
// it may hold things that do not belong to us.
|
|
return tmpDir, idtools.MkdirAllAs(tmpDir, 0700, rootUID, rootGID)
|
|
}
|
|
|
|
func (daemon *Daemon) setupInitLayer(initPath string) error {
|
|
rootUID, rootGID := daemon.GetRemappedUIDGID()
|
|
return initlayer.Setup(initPath, rootUID, rootGID)
|
|
}
|
|
|
|
func setDefaultMtu(conf *config.Config) {
|
|
// do nothing if the config does not have the default 0 value.
|
|
if conf.Mtu != 0 {
|
|
return
|
|
}
|
|
conf.Mtu = config.DefaultNetworkMtu
|
|
}
|
|
|
|
func (daemon *Daemon) configureVolumes(rootUID, rootGID int) (*store.VolumeStore, error) {
|
|
volumesDriver, err := local.New(daemon.configStore.Root, rootUID, rootGID)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
volumedrivers.RegisterPluginGetter(daemon.PluginStore)
|
|
|
|
if !volumedrivers.Register(volumesDriver, volumesDriver.Name()) {
|
|
return nil, errors.New("local volume driver could not be registered")
|
|
}
|
|
return store.New(daemon.configStore.Root)
|
|
}
|
|
|
|
// IsShuttingDown tells whether the daemon is shutting down or not
|
|
func (daemon *Daemon) IsShuttingDown() bool {
|
|
return daemon.shutdown
|
|
}
|
|
|
|
// initDiscovery initializes the discovery watcher for this daemon.
|
|
func (daemon *Daemon) initDiscovery(conf *config.Config) error {
|
|
advertise, err := config.ParseClusterAdvertiseSettings(conf.ClusterStore, conf.ClusterAdvertise)
|
|
if err != nil {
|
|
if err == discovery.ErrDiscoveryDisabled {
|
|
return nil
|
|
}
|
|
return err
|
|
}
|
|
|
|
conf.ClusterAdvertise = advertise
|
|
discoveryWatcher, err := discovery.Init(conf.ClusterStore, conf.ClusterAdvertise, conf.ClusterOpts)
|
|
if err != nil {
|
|
return fmt.Errorf("discovery initialization failed (%v)", err)
|
|
}
|
|
|
|
daemon.discoveryWatcher = discoveryWatcher
|
|
return nil
|
|
}
|
|
|
|
func isBridgeNetworkDisabled(conf *config.Config) bool {
|
|
return conf.BridgeConfig.Iface == config.DisableNetworkBridge
|
|
}
|
|
|
|
func (daemon *Daemon) networkOptions(dconfig *config.Config, pg plugingetter.PluginGetter, activeSandboxes map[string]interface{}) ([]nwconfig.Option, error) {
|
|
options := []nwconfig.Option{}
|
|
if dconfig == nil {
|
|
return options, nil
|
|
}
|
|
|
|
options = append(options, nwconfig.OptionExperimental(dconfig.Experimental))
|
|
options = append(options, nwconfig.OptionDataDir(dconfig.Root))
|
|
options = append(options, nwconfig.OptionExecRoot(dconfig.GetExecRoot()))
|
|
|
|
dd := runconfig.DefaultDaemonNetworkMode()
|
|
dn := runconfig.DefaultDaemonNetworkMode().NetworkName()
|
|
options = append(options, nwconfig.OptionDefaultDriver(string(dd)))
|
|
options = append(options, nwconfig.OptionDefaultNetwork(dn))
|
|
|
|
if strings.TrimSpace(dconfig.ClusterStore) != "" {
|
|
kv := strings.Split(dconfig.ClusterStore, "://")
|
|
if len(kv) != 2 {
|
|
return nil, errors.New("kv store daemon config must be of the form KV-PROVIDER://KV-URL")
|
|
}
|
|
options = append(options, nwconfig.OptionKVProvider(kv[0]))
|
|
options = append(options, nwconfig.OptionKVProviderURL(kv[1]))
|
|
}
|
|
if len(dconfig.ClusterOpts) > 0 {
|
|
options = append(options, nwconfig.OptionKVOpts(dconfig.ClusterOpts))
|
|
}
|
|
|
|
if daemon.discoveryWatcher != nil {
|
|
options = append(options, nwconfig.OptionDiscoveryWatcher(daemon.discoveryWatcher))
|
|
}
|
|
|
|
if dconfig.ClusterAdvertise != "" {
|
|
options = append(options, nwconfig.OptionDiscoveryAddress(dconfig.ClusterAdvertise))
|
|
}
|
|
|
|
options = append(options, nwconfig.OptionLabels(dconfig.Labels))
|
|
options = append(options, driverOptions(dconfig)...)
|
|
|
|
if daemon.configStore != nil && daemon.configStore.LiveRestoreEnabled && len(activeSandboxes) != 0 {
|
|
options = append(options, nwconfig.OptionActiveSandboxes(activeSandboxes))
|
|
}
|
|
|
|
if pg != nil {
|
|
options = append(options, nwconfig.OptionPluginGetter(pg))
|
|
}
|
|
|
|
return options, nil
|
|
}
|
|
|
|
func copyBlkioEntry(entries []*containerd.BlkioStatsEntry) []types.BlkioStatEntry {
|
|
out := make([]types.BlkioStatEntry, len(entries))
|
|
for i, re := range entries {
|
|
out[i] = types.BlkioStatEntry{
|
|
Major: re.Major,
|
|
Minor: re.Minor,
|
|
Op: re.Op,
|
|
Value: re.Value,
|
|
}
|
|
}
|
|
return out
|
|
}
|
|
|
|
// GetCluster returns the cluster
|
|
func (daemon *Daemon) GetCluster() Cluster {
|
|
return daemon.cluster
|
|
}
|
|
|
|
// SetCluster sets the cluster
|
|
func (daemon *Daemon) SetCluster(cluster Cluster) {
|
|
daemon.cluster = cluster
|
|
}
|
|
|
|
func (daemon *Daemon) pluginShutdown() {
|
|
manager := daemon.pluginManager
|
|
// Check for a valid manager object. In error conditions, daemon init can fail
|
|
// and shutdown called, before plugin manager is initialized.
|
|
if manager != nil {
|
|
manager.Shutdown()
|
|
}
|
|
}
|
|
|
|
// PluginManager returns current pluginManager associated with the daemon
|
|
func (daemon *Daemon) PluginManager() *plugin.Manager { // set up before daemon to avoid this method
|
|
return daemon.pluginManager
|
|
}
|
|
|
|
// PluginGetter returns current pluginStore associated with the daemon
|
|
func (daemon *Daemon) PluginGetter() *plugin.Store {
|
|
return daemon.PluginStore
|
|
}
|
|
|
|
// CreateDaemonRoot creates the root for the daemon
|
|
func CreateDaemonRoot(config *config.Config) error {
|
|
// 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 fmt.Errorf("Unable to get the full path to root (%s): %s", config.Root, err)
|
|
}
|
|
}
|
|
|
|
uidMaps, gidMaps, err := setupRemappedRoot(config)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
rootUID, rootGID, err := idtools.GetRootUIDGID(uidMaps, gidMaps)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if err := setupDaemonRoot(config, realRoot, rootUID, rootGID); err != nil {
|
|
return err
|
|
}
|
|
|
|
return nil
|
|
}
|