[SOLVED] Create a Cluster by using the LAN IP, not the main/public IP - how to?

[Razva]

Hey,

I have two servers:

• Server1: http://sprunge.us/WbUQJP
• Server2: http://sprunge.us/RKIeAt

Both servers are in the same (Hetzner) 4001 vSwitch: https://www.screencast.com/t/GLPbiq9iK

They can ping/access each other without any problems.

root@pmx1298466 ~ # ping 192.168.1.11
PING 192.168.1.11 (192.168.1.11) 56(84) bytes of data.
64 bytes from 192.168.1.11: icmp_seq=1 ttl=64 time=0.240 ms
64 bytes from 192.168.1.11: icmp_seq=2 ttl=64 time=0.380 ms
64 bytes from 192.168.1.11: icmp_seq=3 ttl=64 time=0.353 m

root@pmx11298467 ~ # ping 192.168.1.10
PING 192.168.1.10 (192.168.1.10) 56(84) bytes of data.
64 bytes from 192.168.1.10: icmp_seq=1 ttl=64 time=0.261 ms
64 bytes from 192.168.1.10: icmp_seq=2 ttl=64 time=0.355 ms
64 bytes from 192.168.1.10: icmp_seq=3 ttl=64 time=0.369 ms

When creating the Cluster I do it like this: https://www.screencast.com/t/qpzj3NSQCvP

The issue is that the Cluster uses the public IP, not the private one, even if I selected it (as you can previously see).

The Proxmox documentation specifies this:

Under Datacenter → Cluster, click on Create Cluster. Enter the cluster name and select a network connection from the dropdown to serve as the main cluster network (Link 0). It defaults to the IP resolved via the node’s hostname.

Also the pvecm documentation specifies this:

pvecm create <clustername> [OPTIONS]
Generate new cluster configuration. If no links given, default to local IP address as link0.

<clustername>: <string>
The name of the cluster.

--link[n] [address=]<IP> [,priority=<integer>]
Address and priority information of a single corosync link. (up to 8 links supported; link0..link7)

--nodeid <integer> (1 - N)
Node id for this node.

--votes <integer> (1 - N)
Number of votes for this node.

So what is basically "link"? Because it seems that it influences the IP used by the Cluster.

My end-game is to set the Cluster to use the LAN IP class, not the public IP.

Thanks!

 

[DerDanilo]

Hey,

I have two servers:

• Server1: http://sprunge.us/WbUQJP
• Server2: http://sprunge.us/RKIeAt

Both servers are in the same (Hetzner) 4001 vSwitch: https://www.screencast.com/t/GLPbiq9iK

They can ping/access each other without any problems.

root@pmx1298466 ~ # ping 192.168.1.11
PING 192.168.1.11 (192.168.1.11) 56(84) bytes of data.
64 bytes from 192.168.1.11: icmp_seq=1 ttl=64 time=0.240 ms
64 bytes from 192.168.1.11: icmp_seq=2 ttl=64 time=0.380 ms
64 bytes from 192.168.1.11: icmp_seq=3 ttl=64 time=0.353 m

root@pmx11298467 ~ # ping 192.168.1.10
PING 192.168.1.10 (192.168.1.10) 56(84) bytes of data.
64 bytes from 192.168.1.10: icmp_seq=1 ttl=64 time=0.261 ms
64 bytes from 192.168.1.10: icmp_seq=2 ttl=64 time=0.355 ms
64 bytes from 192.168.1.10: icmp_seq=3 ttl=64 time=0.369 ms

When creating the Cluster I do it like this: https://www.screencast.com/t/qpzj3NSQCvP

The issue is that the Cluster uses the public IP, not the private one, even if I selected it (as you can previously see).

The Proxmox documentation specifies this:


Also the pvecm documentation specifies this:

So what is basically "link"? Because it seems that it influences the IP used by the Cluster.

My end-game is to set the Cluster to use the LAN IP class, not the public IP.

Thanks!

/etc/hosts should to contain the correct host<-->IP mapping for all cluster nodes.
While joining further nodes you should select what IP to use for the link.

 

[Razva]

/etc/hosts should to contain the correct host<-->IP mapping for all cluster nodes.
While joining further nodes you should select what IP to use for the link.

Sorry for the late reply.

Here's the current hosts file:

127.0.0.1 localhost.localdomain localhost
46.4.52.91 pmx1298466.eu.neutralisp.com pmx1298466

Should I ... resolve the hostname to the LAN IP? Is that "sane"?