Cannot connect to XOA VM

isdpcman 0

We have XCP-ng setup with two VMs. I have assigned a static IP to the XOA machine. Sometimes it works, other times it is unreachable (this has happened several times, now). If I restart the VM host I can get back in. But I can't keep doing this to manage the VM host machine! When I try to connect to the XOA machine (https://192.9.91.8) I get "Unable to connect" in the browser.

How can I resolve this so it's reliable to connect to the console and manage these VM's?

olivierlambert

Hi,

In order to assist, we need more context. However, my guess is likely an IP conflict. Be sure that your XOA VM doesn't have the same IP than any other equipment on your network.

isdpcman 0

@olivierlambert

It has a DHCP reservation specifically for the MAC of the virtual network adapter. There are no other devices on the LAN in this section of the IP range (the DHCP scope is 100-249). There are 6 devices in the 6-21 range, This is one of them. However, for shits and giggles I changed the reservation IP to .9 and restarted the XOA VM. I can ping the 192.9.91.9 address on the LAN now (when I pinged before there were no replies). Now I get 4 with <1ms delay. However, when I try to access the XOA machine at the new IP address I get "This site can't be reached, 192.9.91.9 refused to connect"

DustinB

@isdpcman-0 Does something else on the network have the same DHCP address or reservation? If so that would explain why the interface works for a bit and then stops working.

ISDPCMAN

@DustinB
As stated, I reassigned the IP to an address I couldn't ping (192.9.91.9). So, no, there are no other devices on the LAN with the same address.

DustinB

@ISDPCMAN So to confirm, your DHCP scope and subnet are

192.9.91.0/24
Your XOA is using DHCP and there is a reservation for this VM's MAC address
Your DCHP Scope is 192.9.100-249
Subnet is 255.255.255.0

On the XOA VM are you able to run ip -a and see what it's pulled, and on your DHCP server can you validate the MAC address aligns to the VM?

isdpcman 0

@DustinB
Yes, I have logged into the DHCP server and I can see the IP address was allocated to the specified MAC address. And right now I can connect to the XOA device. The problem is, after a while I am no longer able to access that device. It's like once it hits 24 hours old (speculating...I haven't timed it) the connection no longer happens. I get denied. When I check the XCP-ng host, I can see that the XOA device is in a running state. Very odd to me...

DustinB

@isdpcman-0 said in Cannot connect to XOA VM:

@DustinB
Yes, I have logged into the DHCP server and I can see the IP address was allocated to the specified MAC address. And right now I can connect to the XOA device. The problem is, after a while I am no longer able to access that device. It's like once it hits 24 hours old (speculating...I haven't timed it) the connection no longer happens. I get denied. When I check the XCP-ng host, I can see that the XOA device is in a running state. Very odd to me...

This to me would indicate that something else on your network is attempting to use that 192.9.91.9 ip address that you're unaware of.

If you power of XOA (after validating that it's using your assigned IP address) can you still ping 192.9.91.9 with an active response?

Ofcourse it's possible whatever else is on your network is configured to not reply to ICMP, but that is another matter entirely.

Danp

@isdpcman-0 I would recommend troubleshooting the XO VM by checking the logs. Are you running XOA or XO from sources? Which commit or version?

isdpcman 0

@Danp XOA

Danp

@isdpcman-0 Which version are you running (XOA > Updates)? You can check the logs by connecting to the VM via SSH and then running the command journalctl -u xo-server -f -n 50.