func isCompatibleWithVers(vers map[string]*version.Versions, local types.ID, minV, maxV *semver.Version) bool { var ok bool for id, v := range vers { // ignore comparasion with local version if id == local.String() { continue } if v == nil { continue } clusterv, err := semver.NewVersion(v.Cluster) if err != nil { plog.Errorf("cannot understand the cluster version of member %s (%v)", id, err) continue } if clusterv.LessThan(*minV) { plog.Warningf("the running cluster version(%v) is lower than the minimal cluster version(%v) supported", clusterv.String(), minV.String()) return false } if maxV.LessThan(*clusterv) { plog.Warningf("the running cluster version(%v) is higher than the maximum cluster version(%v) supported", clusterv.String(), maxV.String()) return false } ok = true } return ok }
func (c *cluster) SetVersion(ver *semver.Version) { c.Lock() defer c.Unlock() if c.version != nil { plog.Noticef("updated the cluster version from %v to %v", c.version.String(), ver.String()) } else { plog.Noticef("set the initial cluster version to %v", ver.String()) } c.version = ver }
// capabilityLoop checks the cluster version every 500ms and updates // the enabledCapability when the cluster version increased. // capabilityLoop MUST be ran in a goroutine before checking capability // or using capabilityHandler. func capabilityLoop(s *etcdserver.EtcdServer) { stopped := s.StopNotify() var pv *semver.Version for { if v := s.ClusterVersion(); v != pv { if pv == nil { pv = v } else if v != nil && pv.LessThan(*v) { pv = v } enableMapMu.Lock() enabledMap = capabilityMaps[pv.String()] enableMapMu.Unlock() } select { case <-stopped: return case <-time.After(500 * time.Millisecond): } } }
func MustDetectDowngrade(cv *semver.Version) { lv := semver.Must(semver.NewVersion(version.Version)) // only keep major.minor version for comparison against cluster version lv = &semver.Version{Major: lv.Major, Minor: lv.Minor} if cv != nil && lv.LessThan(*cv) { plog.Fatalf("cluster cannot be downgraded (current version: %s is lower than determined cluster version: %s).", version.Version, version.Cluster(cv.String())) } }