How to Set Up a Redundant Ceph Network？？

[pve51888]

 

[pve51888]

root@pvetest1:~# cat /etc/pve/ceph.conf
[global]
auth_client_required = cephx
auth_cluster_required = cephx
auth_service_required = cephx
cluster_network = ['192.168.11.71/24,192.168.71.71/24']
fsid = 51bf76ca-9a65-425a-9100-222ca869f015
mon_allow_pool_delete = true
mon_host = 192.168.11.71
ms_bind_ipv4 = true
ms_bind_ipv6 = false
osd_pool_default_min_size = 2
osd_pool_default_size = 3
public_network = ['192.168.11.71/24,192.168.71.71/24']

[client]
keyring = /etc/pve/priv/$cluster.$name.keyring

[mon.pvetest1]
public_addr = 192.168.11.71

 

[pve51888]

root@pvetest1:~# cat /etc/pve/corosync.conf
logging {
debug: off
to_syslog: yes
}

nodelist {
node {
name: pvetest1
nodeid: 1
quorum_votes: 1
ring0_addr: 192.168.71.71
ring1_addr: 192.168.11.71
}
node {
name: pvetest2
nodeid: 2
quorum_votes: 1
ring0_addr: 192.168.71.72
ring1_addr: 192.168.11.72
}
node {
name: pvetest3
nodeid: 3
quorum_votes: 1
ring0_addr: 192.168.71.73
ring1_addr: 192.168.11.73
}
}

quorum {
provider: corosync_votequorum
}

totem {
cluster_name: pve
config_version: 3
interface {
linknumber: 0
}
interface {
linknumber: 1
}
ip_version: ipv4-6
link_mode: passive
secauth: on
version: 2
}

 

[pve51888]

@mira

 

[dcsapak]

the docs only talk about 'comma separated subnets' so the line

cluster_network = ['192.168.11.71/24,192.168.71.71/24']

should probably be:

cluster_network = 192.168.11.71/24,192.168.71.71/24

 

[VictorSTS]

AFAIR, having multiple public or cluster Ceph networks will not magically provide switch failover. Multiple netwworks will merely tell Ceph daemons where to listen to and which networks will be used to talk both with Ceph daemons and clients, no more, no less. In fact, you will need to route both networks so a daemon can talk to every other Ceph component on either two networks.

To accomplish switch redundacy you must use link aggregation / bonding [1] (ideally LACP if your switch support stacking), then use a single public network and (optionally but recomended) a single cluster network.

[1] https://pve.proxmox.com/wiki/Network_Configuration#sysadmin_network_bond