package libnetwork import ( "encoding/json" "sync" "github.com/docker/libnetwork/datastore" "github.com/docker/libnetwork/osl" "github.com/sirupsen/logrus" ) const ( sandboxPrefix = "sandbox" ) type epState struct { Eid string Nid string } type sbState struct { ID string Cid string c *controller dbIndex uint64 dbExists bool Eps []epState EpPriority map[string]int // external servers have to be persisted so that on restart of a live-restore // enabled daemon we get the external servers for the running containers. // We have two versions of ExtDNS to support upgrade & downgrade of the daemon // between >=1.14 and <1.14 versions. ExtDNS []string ExtDNS2 []extDNSEntry } func (sbs *sbState) Key() []string { return []string{sandboxPrefix, sbs.ID} } func (sbs *sbState) KeyPrefix() []string { return []string{sandboxPrefix} } func (sbs *sbState) Value() []byte { b, err := json.Marshal(sbs) if err != nil { return nil } return b } func (sbs *sbState) SetValue(value []byte) error { return json.Unmarshal(value, sbs) } func (sbs *sbState) Index() uint64 { sbi, err := sbs.c.SandboxByID(sbs.ID) if err != nil { return sbs.dbIndex } sb := sbi.(*sandbox) maxIndex := sb.dbIndex if sbs.dbIndex > maxIndex { maxIndex = sbs.dbIndex } return maxIndex } func (sbs *sbState) SetIndex(index uint64) { sbs.dbIndex = index sbs.dbExists = true sbi, err := sbs.c.SandboxByID(sbs.ID) if err != nil { return } sb := sbi.(*sandbox) sb.dbIndex = index sb.dbExists = true } func (sbs *sbState) Exists() bool { if sbs.dbExists { return sbs.dbExists } sbi, err := sbs.c.SandboxByID(sbs.ID) if err != nil { return false } sb := sbi.(*sandbox) return sb.dbExists } func (sbs *sbState) Skip() bool { return false } func (sbs *sbState) New() datastore.KVObject { return &sbState{c: sbs.c} } func (sbs *sbState) CopyTo(o datastore.KVObject) error { dstSbs := o.(*sbState) dstSbs.c = sbs.c dstSbs.ID = sbs.ID dstSbs.Cid = sbs.Cid dstSbs.dbIndex = sbs.dbIndex dstSbs.dbExists = sbs.dbExists dstSbs.EpPriority = sbs.EpPriority dstSbs.Eps = append(dstSbs.Eps, sbs.Eps...) if len(sbs.ExtDNS2) > 0 { for _, dns := range sbs.ExtDNS2 { dstSbs.ExtDNS2 = append(dstSbs.ExtDNS2, dns) dstSbs.ExtDNS = append(dstSbs.ExtDNS, dns.IPStr) } return nil } for _, dns := range sbs.ExtDNS { dstSbs.ExtDNS = append(dstSbs.ExtDNS, dns) dstSbs.ExtDNS2 = append(dstSbs.ExtDNS2, extDNSEntry{IPStr: dns}) } return nil } func (sbs *sbState) DataScope() string { return datastore.LocalScope } func (sb *sandbox) storeUpdate() error { sbs := &sbState{ c: sb.controller, ID: sb.id, Cid: sb.containerID, EpPriority: sb.epPriority, ExtDNS2: sb.extDNS, } for _, ext := range sb.extDNS { sbs.ExtDNS = append(sbs.ExtDNS, ext.IPStr) } retry: sbs.Eps = nil for _, ep := range sb.getConnectedEndpoints() { // If the endpoint is not persisted then do not add it to // the sandbox checkpoint if ep.Skip() { continue } eps := epState{ Nid: ep.getNetwork().ID(), Eid: ep.ID(), } sbs.Eps = append(sbs.Eps, eps) } err := sb.controller.updateToStore(sbs) if err == datastore.ErrKeyModified { // When we get ErrKeyModified it is sufficient to just // go back and retry. No need to get the object from // the store because we always regenerate the store // state from in memory sandbox state goto retry } return err } func (sb *sandbox) storeDelete() error { sbs := &sbState{ c: sb.controller, ID: sb.id, Cid: sb.containerID, dbIndex: sb.dbIndex, dbExists: sb.dbExists, } return sb.controller.deleteFromStore(sbs) } func (c *controller) sandboxCleanup(activeSandboxes map[string]interface{}) { store := c.getStore(datastore.LocalScope) if store == nil { logrus.Error("Could not find local scope store while trying to cleanup sandboxes") return } kvol, err := store.List(datastore.Key(sandboxPrefix), &sbState{c: c}) if err != nil && err != datastore.ErrKeyNotFound { logrus.Errorf("failed to get sandboxes for scope %s: %v", store.Scope(), err) return } // It's normal for no sandboxes to be found. Just bail out. if err == datastore.ErrKeyNotFound { return } for _, kvo := range kvol { sbs := kvo.(*sbState) sb := &sandbox{ id: sbs.ID, controller: sbs.c, containerID: sbs.Cid, endpoints: []*endpoint{}, populatedEndpoints: map[string]struct{}{}, dbIndex: sbs.dbIndex, isStub: true, dbExists: true, } // If we are restoring from a older version extDNSEntry won't have the // HostLoopback field if len(sbs.ExtDNS2) > 0 { sb.extDNS = sbs.ExtDNS2 } else { for _, dns := range sbs.ExtDNS { sb.extDNS = append(sb.extDNS, extDNSEntry{IPStr: dns}) } } msg := " for cleanup" create := true isRestore := false if val, ok := activeSandboxes[sb.ID()]; ok { msg = "" sb.isStub = false isRestore = true opts := val.([]SandboxOption) sb.processOptions(opts...) sb.restorePath() create = !sb.config.useDefaultSandBox } sb.osSbox, err = osl.NewSandbox(sb.Key(), create, isRestore) if err != nil { logrus.Errorf("failed to create osl sandbox while trying to restore sandbox %.7s%s: %v", sb.ID(), msg, err) continue } c.Lock() c.sandboxes[sb.id] = sb c.Unlock() for _, eps := range sbs.Eps { n, err := c.getNetworkFromStore(eps.Nid) var ep *endpoint if err != nil { logrus.Errorf("getNetworkFromStore for nid %s failed while trying to build sandbox for cleanup: %v", eps.Nid, err) n = &network{id: eps.Nid, ctrlr: c, drvOnce: &sync.Once{}, persist: true} ep = &endpoint{id: eps.Eid, network: n, sandboxID: sbs.ID} } else { ep, err = n.getEndpointFromStore(eps.Eid) if err != nil { logrus.Errorf("getEndpointFromStore for eid %s failed while trying to build sandbox for cleanup: %v", eps.Eid, err) ep = &endpoint{id: eps.Eid, network: n, sandboxID: sbs.ID} } } if _, ok := activeSandboxes[sb.ID()]; ok && err != nil { logrus.Errorf("failed to restore endpoint %s in %s for container %s due to %v", eps.Eid, eps.Nid, sb.ContainerID(), err) continue } sb.addEndpoint(ep) } if _, ok := activeSandboxes[sb.ID()]; !ok { logrus.Infof("Removing stale sandbox %s (%s)", sb.id, sb.containerID) if err := sb.delete(true); err != nil { logrus.Errorf("Failed to delete sandbox %s while trying to cleanup: %v", sb.id, err) } continue } // reconstruct osl sandbox field if !sb.config.useDefaultSandBox { if err := sb.restoreOslSandbox(); err != nil { logrus.Errorf("failed to populate fields for osl sandbox %s", sb.ID()) continue } } else { c.sboxOnce.Do(func() { c.defOsSbox = sb.osSbox }) } for _, ep := range sb.endpoints { // Watch for service records if !c.isAgent() { c.watchSvcRecord(ep) } } } }