func isValidAsCandidateSiblingOfIntermediateMaster(intermediateMasterInstance *inst.Instance, sibling *inst.Instance) bool {
if sibling.Key.Equals(&intermediateMasterInstance.Key) {
// same instance
return false
}
if !isGeneralyValidAsCandidateSiblingOfIntermediateMaster(sibling) {
return false
}
if sibling.HasReplicationFilters != intermediateMasterInstance.HasReplicationFilters {
return false
}
if sibling.IsMaxScale() || intermediateMasterInstance.IsMaxScale() {
// With MaxScale the failover is different; we don't need this "move to uncle" logic.
return false
}
if sibling.ExecBinlogCoordinates.SmallerThan(&intermediateMasterInstance.ExecBinlogCoordinates) {
return false
}
return true
}
func isValidAsCandidateSiblingOfIntermediateMaster(intermediateMasterInstance *inst.Instance, sibling *inst.Instance) bool {
if sibling.Key.Equals(&intermediateMasterInstance.Key) {
// same instance
return false
}
if !isGeneralyValidAsCandidateSiblingOfIntermediateMaster(sibling) {
return false
}
if sibling.HasReplicationFilters != intermediateMasterInstance.HasReplicationFilters {
return false
}
if sibling.IsMaxScale() != intermediateMasterInstance.IsMaxScale() {
// When both are maxscale, failover is trivial.
// When failved IM is maxscale, its sibling is still valid, but we catually prefer to just repoint the slave up -- simplest!
return false
}
if sibling.ExecBinlogCoordinates.SmallerThan(&intermediateMasterInstance.ExecBinlogCoordinates) {
return false
}
return true
}