[SOLVED] 2 Node Cluster -VMs have internet access on one but not the other

RickoT

New Member
Jun 30, 2020
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Greetings,
I have just built a 2 node proxmox cluster.

I have 2 machines with identical hardware as follows:
  • 8 Core Processor
  • 32 GB RAM
  • 1 SSD
  • 2 NICs (one built in, one card)
Network Config (identical on each device except CDIR obviously)
1593546477827.png

/etc/network/interfaces
2020-06-30_12h27_17.png

The firewall is configured as such:
1593546556463.png

The only difference in both machines, is Node 1 has been tinkered with to fix the issue, but node2 was out of the box untouched except for network config.
On node 1:
  • From VM
    • Can ping bridge IP
    • Can't Ping LAN IP or hostname
    • Can't ping internet IP or hostname
  • From Host
    • Can Ping Bridge IP
    • Can ping LAN
    • Can ping internet
On Node 2:
  • From VM
    • Can Ping Bridge IP
    • Can ping LAN
    • Can ping internet
  • From Host
    • Can Ping Bridge IP
    • Can ping LAN
    • Can ping internet
Any assistance would be most appreciated!

Thanks!
~Rick
 

RickoT

New Member
Jun 30, 2020
3
0
1
40
So after more tinkering and looking deeper into the network stack.. I discovered that yes, my proxmox config was perfect... but docker had messed something up with how the bridge was operating and I think attaching to the nic instead of the bridge (maybe overriding the network config?) who knows. I deleted the default docker_gwbridge network and it works fine. So this was basically my own fault but I'm happy to share it with anyone else who tries to build proxmox with docker

Thanks!
~Rick
 

RickoT

New Member
Jun 30, 2020
3
0
1
40
Just to add an additional note, it turns out that I had installed docker and configured it on Node 1 and created a swarm and all that, but did nothing with node 2 except add it to the swarm... will need to keep an eye on this as I work more with docker on these nodes
 

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