[SOLVED] Peer/Cluster Communication not Working

P

pker

New Member
Oct 9, 2023
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Hi, I've setted up two Proxmox Servers in my home lab, each one running in a distinct physical server, but can't ping each other, neither join the same cluster.

Both PVE can:
  • Ping the gateway (192.168.15.1);
  • Ping outside ips (8.8.8.8)
  • Ping other devices in lan;
  • Receives pings from my own desktop
Both PVE can't:
  • Join cluster (500 ERROR; Unable to Reach Host)
  • Ping each other (Unable to Reach Host)
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: enp2s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master vmbr0 state UP group default qlen 1000 link/ether 74:27:ea:63:e6:6e brd ff:ff:ff:ff:ff:ff 3: vmbr0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000 link/ether 74:27:ea:63:e6:6e brd ff:ff:ff:ff:ff:ff inet 192.168.15.111/24 scope global vmbr0 valid_lft forever preferred_lft forever inet6 fe80::7627:eaff:fe63:e66e/64 scope link valid_lft forever preferred_lft forever default via 192.168.15.1 dev vmbr0 proto kernel onlink 192.168.15.0/24 dev vmbr0 proto kernel scope link src 192.168.15.111
iface lo inet loopback iface enp2s0 inet manual auto vmbr0 iface vmbr0 inet static address 192.168.15.111/24 gateway 192.168.15.1 bridge-ports enp2s0 bridge-stp off bridge-fd 0


1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: enp2s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master vmbr0 state UP group default qlen 1000 link/ether 74:27:ea:64:1f:51 brd ff:ff:ff:ff:ff:ff 3: vmbr0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000 link/ether 74:27:ea:64:1f:51 brd ff:ff:ff:ff:ff:ff inet 192.168.15.112/24 scope global vmbr0 valid_lft forever preferred_lft forever inet6 fe80::7627:eaff:fe64:1f51/64 scope link valid_lft forever preferred_lft forever default via 192.168.15.1 dev vmbr0 proto kernel onlink 192.168.15.0/24 dev vmbr0 proto kernel scope link src 192.168.15.112
auto lo iface lo inet loopback iface enp2s0 inet manual auto vmbr0 iface vmbr0 inet static address 192.168.15.112/24 gateway 192.168.15.1 bridge-ports enp2s0 bridge-stp off bridge-fd 0
 
Last edited:
Can you post the output of the Cluster Join log?
Additionally the contents of /etc/hosts of both nodes would be interesting
 
1696863376510.png

127.0.0.1 localhost.localdomain localhost 192.168.15.111 pve.andradejoaoh pve # The following lines are desirable for IPv6 capable hosts ::1 ip6-localhost ip6-loopback fe00::0 ip6-localnet ff00::0 ip6-mcastprefix ff02::1 ip6-allnodes ff02::2 ip6-allrouters ff02::3 ip6-allhosts

127.0.0.1 localhost.localdomain localhost 192.168.15.112 pve2.andradejoaoh pve2 # The following lines are desirable for IPv6 capable hosts ::1 ip6-localhost ip6-loopback fe00::0 ip6-localnet ff00::0 ip6-mcastprefix ff02::1 ip6-allnodes ff02::2 ip6-allrouters ff02::3 ip6-allhosts
 

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What are the hostnames of both hosts? cat /etc/hostname
 
Quite odd, do you have any Firewall set in PVE or in between the nodes that could block the connection?
 
I haven't set any firewalls, they were fresh installed, I didn't change anything.
I don't think the router is blocking it.
 
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