[Linux-cluster] Rhel 7.2 Pacemaker cluster - gfs2 file system- NFS document
Dawood Munavar S M
dawood.m at msystechnologies.com
Sat Apr 29 07:08:57 UTC 2017
Hi Emmanuel,
Please find the status below,
[root at node1-emulex ~]# pcs status
Cluster name: mycluster
Stack: corosync
Current DC: node2-atto (version 1.1.15-11.el7_3.4-e174ec8) - partition with
quorum
Last updated: Sat Apr 29 03:01:41 2017 Last change: Fri Apr 28
11:09:25 2017 by root via cibadmin on node2-atto
2 nodes and 10 resources configured
Online: [ node1-emulex node2-atto ]
Full list of resources:
scsi (stonith:fence_scsi): Started node2-atto
Clone Set: dlm-clone [dlm]
Started: [ node1-emulex node2-atto ]
Clone Set: clvmd-clone [clvmd]
Started: [ node1-emulex node2-atto ]
Clone Set: clusterfs-clone [clusterfs]
Started: [ node1-emulex node2-atto ]
ClusterIP (ocf::heartbeat:IPaddr2): Started node1-emulex
NFS-D (ocf::heartbeat:nfsserver): Started node1-emulex
nfs-cm-shared (ocf::heartbeat:exportfs): Started node2-atto
Daemon Status:
corosync: active/enabled
pacemaker: active/enabled
pcsd: active/enabled
[root at node1-emulex ~]#
[root at node1-emulex ~]# pcs status resources ClusterIP
Resource: ClusterIP (class=ocf provider=heartbeat type=IPaddr2)
Attributes: ip=172.30.59.253 cidr_netmask=19
Operations: start interval=0s timeout=20s (ClusterIP-start-interval-0s)
stop interval=0s timeout=20s (ClusterIP-stop-interval-0s)
monitor interval=30s (ClusterIP-monitor-interval-30s)
[root at node1-emulex ~]#
[root at node1-emulex ~]# pcs status resources NFS-D
Resource: NFS-D (class=ocf provider=heartbeat type=nfsserver)
Attributes: nfs_shared_infodir=/mnt/cluster/nfsinfo/ nfs_ip=172.30.59.253
Operations: start interval=0s timeout=40 (NFS-D-start-interval-0s)
stop interval=0s timeout=20s (NFS-D-stop-interval-0s)
monitor interval=10 timeout=20s (NFS-D-monitor-interval-10)
[root at node1-emulex ~]#
[root at node1-emulex ~]# pcs status resources nfs-cm-shared
Resource: nfs-cm-shared (class=ocf provider=heartbeat type=exportfs)
Attributes: clientspec=172.30.59.254/255.255.224.0
options=rw,sync,no_root_squash directory=/mnt/cluster/exports/ fsid=0
Operations: start interval=0s timeout=40 (nfs-cm-shared-start-interval-0s)
stop interval=0s timeout=120 (nfs-cm-shared-stop-interval-0s)
monitor interval=10 timeout=20
(nfs-cm-shared-monitor-interval-10)
[root at node1-emulex ~]#
[root at node1-emulex ~]# mount | grep gfs2
/dev/mapper/volgroup-vol on /mnt/cluster type gfs2
(rw,noatime,nodiratime,seclabel)
/dev/mapper/volgroup-vol on /var/lib/nfs type gfs2
(rw,noatime,nodiratime,seclabel)
[root at node1-emulex ~]#
Thanks,
Munavar.
On Sat, Apr 29, 2017 at 3:53 AM, emmanuel segura <emi2fast at gmail.com> wrote:
> can you provide pcs status ?
>
> 2017-04-28 17:51 GMT+02:00 Dawood Munavar S M <
> dawood.m at msystechnologies.com>:
>
>> Hi,
>>
>> Thanks for your reply and the valuable comments.
>>
>> Curently I am only sanity testing the Rhel 7.2 cluster configuration with
>> our FC storage arrays, so performance really doesn't matters for us at the
>> moment.
>>
>> Also with regard to creating nfs cluster resources over gfs2, we followed
>> the below steps, but still "showmount -e" doesn't list the export entries,
>>
>> *Note:* This steps are followed after mounting gfs2 file systems on
>> cluster nodes,
>>
>> 1. pcs resource create ClusterIP ocf:heartbeat:IPaddr2 ip=192.168.2.90
>> cidr_netmask=24 op monitor interval=30s
>> 2. pcs resource create NFS-D nfsserver nfs_shared_infodir=/global/nfsinfo
>> nfs_ip=192.168.2.90
>> 3. pcs resource create nfs-cm-shared exportfs clientspec=
>> 192.168.2.0/255.255.255.0 options=rw,sync,no_root_squash
>> directory=/SAP_SOFT fsid=0
>> 4. Added resource dependancies
>> 5. [root at node2-atto ~]# showmount -e 192.168.2.90
>> Export list for 192.168.2.90:
>> **** No Entries *****
>>
>> I went through RedHat forums and it is mentioned that Exporting a GFS2
>> filesystem in an Active/Active configuration is only supported when using
>> *Samba+CTDB* to export the GFS2 filesystem. Please let us know if its
>> mandatory to configure CTDB when nfs over gfs2 is configured or anyother
>> options is available.
>>
>> Thanks,
>> Munavar.
>>
>> On Fri, Apr 28, 2017 at 8:55 PM, Digimer <lists at alteeve.ca> wrote:
>>
>>> On 28/04/17 06:34 AM, Dawood Munavar S M wrote:
>>> > Hello All,
>>> >
>>> > Could you please share any links/documents to create NFS HA cluster
>>> over
>>> > gfs2 file system using Pacemaker.
>>> >
>>> > Currently I have completed till mounting of gfs2 file systems on
>>> cluster
>>> > nodes and now I need to create cluster resources for NFS server,
>>> exports
>>> > and mount on client.
>>> >
>>> > Thanks,
>>> > Munavar.
>>>
>>> I use gfs2 quite a bit, but not nfs.
>>>
>>> Can I make a suggestion? Don't use gfs2 for this.
>>>
>>> You will have much better performance if you use an active/passive
>>> failover with a non-clustered FS. GFS2, like any cluster FS, needs to
>>> have the cluster handle locks which is always going to be slower (by a
>>> fair amount) than traditional internal FS locking.
>>>
>>> The common NFS HA cluster setup is to have the cluster promote/connect
>>> the backing storage (drbd/iscsi), mount the FS, start nfs and then take
>>> a floating IP address.
>>>
>>> GFS2 is an excellent FS for situations where it is needed, and should be
>>> avoided anywhere possible. :)
>>>
>>> --
>>> Digimer
>>> Papers and Projects: https://alteeve.com/w/
>>> "I am, somehow, less interested in the weight and convolutions of
>>> Einstein’s brain than in the near certainty that people of equal talent
>>> have lived and died in cotton fields and sweatshops." - Stephen Jay Gould
>>>
>>
>>
>>
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