// migrateLegacySqliteLinks migrates sqlite links to use links from HostConfig
// when sqlite links were used, hostConfig.Links was set to nil
func (daemon *Daemon) migrateLegacySqliteLinks(db *graphdb.Database, container *container.Container) error {
// if links is populated (or an empty slice), then this isn't using sqlite links and can be skipped
if container.HostConfig == nil || container.HostConfig.Links != nil {
return nil
}
logrus.Debugf("migrating legacy sqlite link info for container: %s", container.ID)
fullName := container.Name
if fullName[0] != '/' {
fullName = "/" + fullName
}
// don't use a nil slice, this ensures that the check above will skip once the migration has completed
links := []string{}
children, err := db.Children(fullName, 0)
if err != nil {
if !strings.Contains(err.Error(), "Cannot find child for") {
return err
}
// else continue... it's ok if we didn't find any children, it'll just be nil and we can continue the migration
}
for _, child := range children {
c, err := daemon.GetContainer(child.Entity.ID())
if err != nil {
return err
}
links = append(links, c.Name+":"+child.Edge.Name)
}
container.HostConfig.Links = links
return container.WriteHostConfig()
}
// sqliteMigration performs the link graph DB migration.
func (daemon *Daemon) sqliteMigration(containers map[string]*container.Container) error {
// migrate any legacy links from sqlite
linkdbFile := filepath.Join(daemon.root, "linkgraph.db")
var (
legacyLinkDB *graphdb.Database
err error
)
legacyLinkDB, err = graphdb.NewSqliteConn(linkdbFile)
if err != nil {
return fmt.Errorf("error connecting to legacy link graph DB %s, container links may be lost: %v", linkdbFile, err)
}
defer legacyLinkDB.Close()
for _, c := range containers {
if err := daemon.migrateLegacySqliteLinks(legacyLinkDB, c); err != nil {
return err
}
}
return nil
}
func (daemon *Daemon) restore() error {
var (
debug = utils.IsDebugEnabled()
currentDriver = daemon.GraphDriverName()
containers = make(map[string]*container.Container)
)
if !debug {
logrus.Info("Loading containers: start.")
}
dir, err := ioutil.ReadDir(daemon.repository)
if err != nil {
return err
}
containerCount := 0
for _, v := range dir {
id := v.Name()
container, err := daemon.load(id)
if !debug && logrus.GetLevel() == logrus.InfoLevel {
fmt.Print(".")
containerCount++
}
if err != nil {
logrus.Errorf("Failed to load container %v: %v", id, err)
continue
}
// Ignore the container if it does not support the current driver being used by the graph
if (container.Driver == "" && currentDriver == "aufs") || container.Driver == currentDriver {
rwlayer, err := daemon.layerStore.GetRWLayer(container.ID)
if err != nil {
logrus.Errorf("Failed to load container mount %v: %v", id, err)
continue
}
container.RWLayer = rwlayer
logrus.Debugf("Loaded container %v", container.ID)
containers[container.ID] = container
} else {
logrus.Debugf("Cannot load container %s because it was created with another graph driver.", container.ID)
}
}
var migrateLegacyLinks bool
restartContainers := make(map[*container.Container]chan struct{})
activeSandboxes := make(map[string]interface{})
for _, c := range containers {
if err := daemon.registerName(c); err != nil {
logrus.Errorf("Failed to register container %s: %s", c.ID, err)
continue
}
if err := daemon.Register(c); err != nil {
logrus.Errorf("Failed to register container %s: %s", c.ID, err)
continue
}
// The LogConfig.Type is empty if the container was created before docker 1.12 with default log driver.
// We should rewrite it to use the daemon defaults.
// Fixes https://github.com/docker/docker/issues/22536
if c.HostConfig.LogConfig.Type == "" {
if err := daemon.mergeAndVerifyLogConfig(&c.HostConfig.LogConfig); err != nil {
logrus.Errorf("Failed to verify log config for container %s: %q", c.ID, err)
continue
}
}
}
var wg sync.WaitGroup
var mapLock sync.Mutex
for _, c := range containers {
wg.Add(1)
go func(c *container.Container) {
defer wg.Done()
rm := c.RestartManager(false)
if c.IsRunning() || c.IsPaused() {
if err := daemon.containerd.Restore(c.ID, libcontainerd.WithRestartManager(rm)); err != nil {
logrus.Errorf("Failed to restore %s with containerd: %s", c.ID, err)
return
}
if !c.HostConfig.NetworkMode.IsContainer() && c.IsRunning() {
options, err := daemon.buildSandboxOptions(c)
if err != nil {
logrus.Warnf("Failed build sandbox option to restore container %s: %v", c.ID, err)
}
mapLock.Lock()
activeSandboxes[c.NetworkSettings.SandboxID] = options
mapLock.Unlock()
}
}
// fixme: only if not running
// get list of containers we need to restart
if daemon.configStore.AutoRestart && !c.IsRunning() && !c.IsPaused() && c.ShouldRestart() {
mapLock.Lock()
restartContainers[c] = make(chan struct{})
mapLock.Unlock()
}
if c.RemovalInProgress {
// We probably crashed in the middle of a removal, reset
// the flag.
//
// We DO NOT remove the container here as we do not
// know if the user had requested for either the
// associated volumes, network links or both to also
// be removed. So we put the container in the "dead"
// state and leave further processing up to them.
logrus.Debugf("Resetting RemovalInProgress flag from %v", c.ID)
c.ResetRemovalInProgress()
c.SetDead()
c.ToDisk()
}
// if c.hostConfig.Links is nil (not just empty), then it is using the old sqlite links and needs to be migrated
if c.HostConfig != nil && c.HostConfig.Links == nil {
migrateLegacyLinks = true
}
}(c)
}
wg.Wait()
daemon.netController, err = daemon.initNetworkController(daemon.configStore, activeSandboxes)
if err != nil {
return fmt.Errorf("Error initializing network controller: %v", err)
}
// migrate any legacy links from sqlite
linkdbFile := filepath.Join(daemon.root, "linkgraph.db")
var legacyLinkDB *graphdb.Database
if migrateLegacyLinks {
legacyLinkDB, err = graphdb.NewSqliteConn(linkdbFile)
if err != nil {
return fmt.Errorf("error connecting to legacy link graph DB %s, container links may be lost: %v", linkdbFile, err)
}
defer legacyLinkDB.Close()
}
// Now that all the containers are registered, register the links
for _, c := range containers {
if migrateLegacyLinks {
if err := daemon.migrateLegacySqliteLinks(legacyLinkDB, c); err != nil {
return err
}
}
if err := daemon.registerLinks(c, c.HostConfig); err != nil {
logrus.Errorf("failed to register link for container %s: %v", c.ID, err)
}
}
group := sync.WaitGroup{}
for c, notifier := range restartContainers {
group.Add(1)
go func(c *container.Container, chNotify chan struct{}) {
defer group.Done()
logrus.Debugf("Starting container %s", c.ID)
// ignore errors here as this is a best effort to wait for children to be
// running before we try to start the container
children := daemon.children(c)
timeout := time.After(5 * time.Second)
for _, child := range children {
if notifier, exists := restartContainers[child]; exists {
select {
case <-notifier:
case <-timeout:
}
}
}
// Make sure networks are available before starting
daemon.waitForNetworks(c)
if err := daemon.containerStart(c); err != nil {
logrus.Errorf("Failed to start container %s: %s", c.ID, err)
}
close(chNotify)
}(c, notifier)
}
group.Wait()
// any containers that were started above would already have had this done,
// however we need to now prepare the mountpoints for the rest of the containers as well.
// This shouldn't cause any issue running on the containers that already had this run.
// This must be run after any containers with a restart policy so that containerized plugins
// can have a chance to be running before we try to initialize them.
for _, c := range containers {
// if the container has restart policy, do not
// prepare the mountpoints since it has been done on restarting.
// This is to speed up the daemon start when a restart container
// has a volume and the volume dirver is not available.
if _, ok := restartContainers[c]; ok {
continue
}
group.Add(1)
go func(c *container.Container) {
defer group.Done()
if err := daemon.prepareMountPoints(c); err != nil {
logrus.Error(err)
}
}(c)
}
group.Wait()
if !debug {
if logrus.GetLevel() == logrus.InfoLevel && containerCount > 0 {
fmt.Println()
}
logrus.Info("Loading containers: done.")
}
return nil
}
func (daemon *Daemon) restore() error {
var (
debug = utils.IsDebugEnabled()
currentDriver = daemon.GraphDriverName()
containers = make(map[string]*container.Container)
)
if !debug {
logrus.Info("Loading containers: start.")
}
dir, err := ioutil.ReadDir(daemon.repository)
if err != nil {
return err
}
for _, v := range dir {
id := v.Name()
container, err := daemon.load(id)
if !debug && logrus.GetLevel() == logrus.InfoLevel {
fmt.Print(".")
}
if err != nil {
logrus.Errorf("Failed to load container %v: %v", id, err)
continue
}
// Ignore the container if it does not support the current driver being used by the graph
if (container.Driver == "" && currentDriver == "aufs") || container.Driver == currentDriver {
rwlayer, err := daemon.layerStore.GetRWLayer(container.ID)
if err != nil {
logrus.Errorf("Failed to load container mount %v: %v", id, err)
continue
}
container.RWLayer = rwlayer
logrus.Debugf("Loaded container %v", container.ID)
containers[container.ID] = container
} else {
logrus.Debugf("Cannot load container %s because it was created with another graph driver.", container.ID)
}
}
var migrateLegacyLinks bool
restartContainers := make(map[*container.Container]chan struct{})
for _, c := range containers {
if err := daemon.registerName(c); err != nil {
logrus.Errorf("Failed to register container %s: %s", c.ID, err)
continue
}
if err := daemon.Register(c); err != nil {
logrus.Errorf("Failed to register container %s: %s", c.ID, err)
continue
}
}
var wg sync.WaitGroup
var mapLock sync.Mutex
for _, c := range containers {
wg.Add(1)
go func(c *container.Container) {
defer wg.Done()
rm := c.RestartManager(false)
if c.IsRunning() || c.IsPaused() {
// Fix activityCount such that graph mounts can be unmounted later
if err := daemon.layerStore.ReinitRWLayer(c.RWLayer); err != nil {
logrus.Errorf("Failed to ReinitRWLayer for %s due to %s", c.ID, err)
return
}
if err := daemon.containerd.Restore(c.ID, libcontainerd.WithRestartManager(rm)); err != nil {
logrus.Errorf("Failed to restore with containerd: %q", err)
return
}
}
// fixme: only if not running
// get list of containers we need to restart
if daemon.configStore.AutoRestart && !c.IsRunning() && !c.IsPaused() && c.ShouldRestart() {
mapLock.Lock()
restartContainers[c] = make(chan struct{})
mapLock.Unlock()
}
// if c.hostConfig.Links is nil (not just empty), then it is using the old sqlite links and needs to be migrated
if c.HostConfig != nil && c.HostConfig.Links == nil {
migrateLegacyLinks = true
}
}(c)
}
wg.Wait()
// migrate any legacy links from sqlite
linkdbFile := filepath.Join(daemon.root, "linkgraph.db")
var legacyLinkDB *graphdb.Database
if migrateLegacyLinks {
legacyLinkDB, err = graphdb.NewSqliteConn(linkdbFile)
if err != nil {
return fmt.Errorf("error connecting to legacy link graph DB %s, container links may be lost: %v", linkdbFile, err)
}
defer legacyLinkDB.Close()
}
// Now that all the containers are registered, register the links
for _, c := range containers {
if migrateLegacyLinks {
if err := daemon.migrateLegacySqliteLinks(legacyLinkDB, c); err != nil {
return err
}
}
if err := daemon.registerLinks(c, c.HostConfig); err != nil {
logrus.Errorf("failed to register link for container %s: %v", c.ID, err)
}
}
group := sync.WaitGroup{}
for c, notifier := range restartContainers {
group.Add(1)
go func(c *container.Container, chNotify chan struct{}) {
defer group.Done()
logrus.Debugf("Starting container %s", c.ID)
// ignore errors here as this is a best effort to wait for children to be
// running before we try to start the container
children := daemon.children(c)
timeout := time.After(5 * time.Second)
for _, child := range children {
if notifier, exists := restartContainers[child]; exists {
select {
case <-notifier:
case <-timeout:
}
}
}
if err := daemon.containerStart(c); err != nil {
logrus.Errorf("Failed to start container %s: %s", c.ID, err)
}
close(chNotify)
}(c, notifier)
}
group.Wait()
// any containers that were started above would already have had this done,
// however we need to now prepare the mountpoints for the rest of the containers as well.
// This shouldn't cause any issue running on the containers that already had this run.
// This must be run after any containers with a restart policy so that containerized plugins
// can have a chance to be running before we try to initialize them.
for _, c := range containers {
// if the container has restart policy, do not
// prepare the mountpoints since it has been done on restarting.
// This is to speed up the daemon start when a restart container
// has a volume and the volume dirver is not available.
if _, ok := restartContainers[c]; ok {
continue
}
group.Add(1)
go func(c *container.Container) {
defer group.Done()
if err := daemon.prepareMountPoints(c); err != nil {
logrus.Error(err)
}
}(c)
}
group.Wait()
if !debug {
if logrus.GetLevel() == logrus.InfoLevel {
fmt.Println()
}
logrus.Info("Loading containers: done.")
}
return nil
}
func (daemon *Daemon) restore() error {
var (
debug = utils.IsDebugEnabled()
currentDriver = daemon.GraphDriverName()
containers = make(map[string]*container.Container)
)
if !debug {
logrus.Info("Loading containers: start.")
}
dir, err := ioutil.ReadDir(daemon.repository)
if err != nil {
return err
}
for _, v := range dir {
id := v.Name()
container, err := daemon.load(id)
if !debug && logrus.GetLevel() == logrus.InfoLevel {
fmt.Print(".")
}
if err != nil {
logrus.Errorf("Failed to load container %v: %v", id, err)
continue
}
rwlayer, err := daemon.layerStore.GetRWLayer(container.ID)
if err != nil {
logrus.Errorf("Failed to load container mount %v: %v", id, err)
continue
}
container.RWLayer = rwlayer
// Ignore the container if it does not support the current driver being used by the graph
if (container.Driver == "" && currentDriver == "aufs") || container.Driver == currentDriver {
logrus.Debugf("Loaded container %v", container.ID)
containers[container.ID] = container
} else {
logrus.Debugf("Cannot load container %s because it was created with another graph driver.", container.ID)
}
}
var migrateLegacyLinks bool
restartContainers := make(map[*container.Container]chan struct{})
for _, c := range containers {
if err := daemon.registerName(c); err != nil {
logrus.Errorf("Failed to register container %s: %s", c.ID, err)
continue
}
if err := daemon.Register(c); err != nil {
logrus.Errorf("Failed to register container %s: %s", c.ID, err)
continue
}
// get list of containers we need to restart
if daemon.configStore.AutoRestart && c.ShouldRestart() {
restartContainers[c] = make(chan struct{})
}
// if c.hostConfig.Links is nil (not just empty), then it is using the old sqlite links and needs to be migrated
if c.HostConfig != nil && c.HostConfig.Links == nil {
migrateLegacyLinks = true
}
}
// migrate any legacy links from sqlite
linkdbFile := filepath.Join(daemon.root, "linkgraph.db")
var legacyLinkDB *graphdb.Database
if migrateLegacyLinks {
legacyLinkDB, err = graphdb.NewSqliteConn(linkdbFile)
if err != nil {
return fmt.Errorf("error connecting to legacy link graph DB %s, container links may be lost: %v", linkdbFile, err)
}
defer legacyLinkDB.Close()
}
// Now that all the containers are registered, register the links
for _, c := range containers {
if migrateLegacyLinks {
if err := daemon.migrateLegacySqliteLinks(legacyLinkDB, c); err != nil {
return err
}
}
if err := daemon.registerLinks(c, c.HostConfig); err != nil {
logrus.Errorf("failed to register link for container %s: %v", c.ID, err)
}
}
group := sync.WaitGroup{}
for c, notifier := range restartContainers {
group.Add(1)
go func(c *container.Container, chNotify chan struct{}) {
defer group.Done()
logrus.Debugf("Starting container %s", c.ID)
// ignore errors here as this is a best effort to wait for children to be
// running before we try to start the container
children := daemon.children(c)
timeout := time.After(5 * time.Second)
for _, child := range children {
if notifier, exists := restartContainers[child]; exists {
select {
case <-notifier:
case <-timeout:
}
}
}
if err := daemon.containerStart(c); err != nil {
logrus.Errorf("Failed to start container %s: %s", c.ID, err)
}
close(chNotify)
}(c, notifier)
}
group.Wait()
if !debug {
if logrus.GetLevel() == logrus.InfoLevel {
fmt.Println()
}
logrus.Info("Loading containers: done.")
}
return nil
}