@Override
public Boolean isVmAlive(VirtualMachine vm, Host host) {
if (!vm.getType().isUsedBySystem()) {
s_logger.debug("Not a System Vm, unable to determine state of " + vm + " returning null");
}
if (s_logger.isDebugEnabled()) {
s_logger.debug("Testing if " + vm + " is alive");
}
if (vm.getHostId() == null) {
s_logger.debug("There's no host id for " + vm);
return null;
}
HostVO vmHost = _hostDao.findById(vm.getHostId());
if (vmHost == null) {
s_logger.debug("Unable to retrieve the host by using id " + vm.getHostId());
return null;
}
List<? extends Nic> nics = _networkMgr.getNicsForTraffic(vm.getId(), TrafficType.Management);
if (nics.size() == 0) {
if (s_logger.isDebugEnabled()) {
s_logger.debug(
"Unable to find a management nic, cannot ping this system VM, unable to determine state of "
+ vm
+ " returning null");
}
return null;
}
for (Nic nic : nics) {
if (nic.getIp4Address() == null) {
continue;
}
// get the data center IP address, find a host on the pod, use that host to ping the data
// center IP address
List<Long> otherHosts = findHostByPod(vmHost.getPodId(), vm.getHostId());
for (Long otherHost : otherHosts) {
Status vmState = testIpAddress(otherHost, nic.getIp4Address());
if (vmState == null) {
// can't get information from that host, try the next one
continue;
}
if (vmState == Status.Up) {
if (s_logger.isDebugEnabled()) {
s_logger.debug(
"successfully pinged vm's private IP ("
+ vm.getPrivateIpAddress()
+ "), returning that the VM is up");
}
return Boolean.TRUE;
} else if (vmState == Status.Down) {
// We can't ping the VM directly...if we can ping the host, then report the VM down.
// If we can't ping the host, then we don't have enough information.
Status vmHostState = testIpAddress(otherHost, vmHost.getPrivateIpAddress());
if ((vmHostState != null) && (vmHostState == Status.Up)) {
if (s_logger.isDebugEnabled()) {
s_logger.debug(
"successfully pinged vm's host IP ("
+ vmHost.getPrivateIpAddress()
+ "), but could not ping VM, returning that the VM is down");
}
return Boolean.FALSE;
}
}
}
}
if (s_logger.isDebugEnabled()) {
s_logger.debug("unable to determine state of " + vm + " returning null");
}
return null;
}
