// checkVersion makes a best-effort attempt to verify that fleetctl is at least as new as the
// latest fleet version found registered in the cluster. If any errors are encountered or fleetctl
// is >= the latest version found, it returns true. If it is < the latest found version, it returns
// false and a scary warning to the user.
func checkVersion(cReg registry.ClusterRegistry) (string, bool) {
fv := version.SemVersion
lv, err := cReg.LatestDaemonVersion()
if err != nil {
log.Errorf("error attempting to check latest fleet version in Registry: %v", err)
} else if lv != nil && fv.LessThan(*lv) {
return fmt.Sprintf(oldVersionWarning, fv.String(), lv.String()), false
}
return "", true
}
func ensureEngineVersionMatch(cReg registry.ClusterRegistry, expect int) bool {
v, err := cReg.EngineVersion()
if err != nil {
log.Errorf("Unable to determine cluster engine version")
return false
}
if v < expect {
err = cReg.UpdateEngineVersion(v, expect)
if err != nil {
log.Errorf("Failed updating cluster engine version from %d to %d: %v", v, expect, err)
return false
}
log.Infof("Updated cluster engine version from %d to %d", v, expect)
} else if v > expect {
log.Debugf("Cluster engine version higher than local engine version (%d > %d), unable to participate", v, expect)
return false
}
return true
}