Hi Devin,
- It takes a minimum of 2 hosts, and we use these specifications to get
a working NFS HA cluster (keepalived_VRRP + HAproxy balancer) :
---------------------------
service_type: ingress
[...]
placement:
count: 2
[...]
spec:
enable_haproxy_protocol: true
[...]
---------------------------
with
---------------------------
service_type: nfs
[...]
placement:
count: 2
[...]
spec:
enable_haproxy_protocol: true
[...]
---------------------------
- To use/test only the VIP without balancing :
replace "enable_haproxy_protocol: true" by "keepalive_only: true" in
the ingress service
remove "enable_haproxy_protocol: true" in the nfs service
Yann
Le 23/04/2025 à 00:19, Devin A. Bougie a écrit :
Hello,
We’ve found that if we lose one of the nfs.cephfs service daemons in our
cephadm 19.2.2 cluster, all NFS traffic is blocked until either:
- the down nfs.cephfs daemon is restarted
- or we reconfigure the placement of the nfs.cephs service to not use the
affected host. After this, the ingress.nfs.cephfs service is automatically
reconfigured and everything resumes
Our current setup follows the "HIGH-AVAILABILITY NFS” documentation, which
gives us an ingress.nfs.cephfs service with the haproxy and keepalived daemons and
an nfs.cephfs service for the actual nfs daemons. This service was deployed using:
ceph nfs cluster create cephfs "label:_admin" --ingress --virtual_ip virtual_ip
And then we updated the ingress.nfs.cephfs service to only deploy a single
service (which in this case, results in two daemons on a single host).
This gives us the following:
———
[root@cephman1 ~]# ceph orch ls --service_name=ingress.nfs.cephfs --export
service_type: ingress
service_id: nfs.cephfs
service_name: ingress.nfs.cephfs
placement:
count: 1
label: _admin
spec:
backend_service: nfs.cephfs
first_virtual_router_id: 50
frontend_port: 2049
monitor_port: 9049
virtual_ip: 128.84.45.48/22
[root@cephman1 ~]# ceph orch ls --service_name=nfs.cephfs --export
service_type: nfs
service_id: cephfs
service_name: nfs.cephfs
placement:
label: _admin
spec:
port: 12049
———
Can anyone show us the config for a true “HA” nfs service where they can lose
any single host without impacting access to the NFS export from clients? I
would expect to be able to lose the host running the ingress.nfs.cephfs
service, and have it automatically restarted on a different host. Likewise, I
would expect to be able to lose an nfs.cephs daemon without impacting access to
the export.
Or should we be taking a completely different approach and move our NFS service
out of Ceph and into our pacemaker / corosync cluster?
Sorry if this sounds redundant to questions I’ve previously asked, but we’ve
reconfigured things a little and it feels like we’re getting closer with each
attempt?
Many thanks,
Devin
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