On 05/12/16 08:16 PM, su liu wrote: > *Hi all, > > * > *I am new to pacemaker and I have some questions about the clvmd + > pacemaker + corosync. I wish you could explain it for me if you are > free. thank you very much! > > * > *I have 2 nodes and the pacemaker's status is as follows:* > > [root@controller ~]# pcs status --full > Cluster name: mycluster > Last updated: Mon Dec 5 18:15:12 2016 Last change: Fri Dec 2 > 15:01:03 2016 by root via cibadmin on compute1 > Stack: corosync > Current DC: compute1 (2) (version 1.1.13-10.el7_2.4-44eb2dd) - partition > with quorum > 2 nodes and 4 resources configured > > Online: [ compute1 (2) controller (1) ] > > Full list of resources: > > Clone Set: dlm-clone [dlm] > dlm (ocf::pacemaker:controld): Started compute1 > dlm (ocf::pacemaker:controld): Started controller > Started: [ compute1 controller ] > Clone Set: clvmd-clone [clvmd] > clvmd (ocf::heartbeat:clvm): Started compute1 > clvmd (ocf::heartbeat:clvm): Started controller > Started: [ compute1 controller ] > > Node Attributes: > * Node compute1 (2): > * Node controller (1): > > Migration Summary: > * Node compute1 (2): > * Node controller (1): > > PCSD Status: > controller: Online > compute1: Online > > Daemon Status: > corosync: active/disabled > pacemaker: active/disabled > pcsd: active/enabled > * > *
You need to configure and enable (and test!) stonith. This is doubly-so with clustered LVM/shared storage. > *I create a lvm on controller node and it can be seen on the compute1 > node immediately with 'lvs' command. but the lvm it not activate on > compute1. > > * > *then i want to create a snapshot of the lvm, but failed with the error > message:* > > /### volume-4fad87bb-3d4c-4a96-bef1-8799980050d1 must be active > exclusively to create snapshot ### > > / > *Can someone tell me how to snapshot a lvm in the cluster lvm > environment? thank you very much。* This is how it works. You can't snapshot a clustered LV, as the error indicates. The process is ACTIVE -> deactivate on all node -> set exclusive on one node -> set it back to ACTIVE, then you can snapshot. It's not very practical, unfortunately. > Additional information: > > [root@controller ~]# vgdisplay > --- Volume group --- > VG Name cinder-volumes > System ID > Format lvm2 > Metadata Areas 1 > Metadata Sequence No 19 > VG Access read/write > VG Status resizable > Clustered yes > Shared no > MAX LV 0 > Cur LV 1 > Open LV 0 > Max PV 0 > Cur PV 1 > Act PV 1 > VG Size 1000.00 GiB > PE Size 4.00 MiB > Total PE 255999 > Alloc PE / Size 256 / 1.00 GiB > Free PE / Size 255743 / 999.00 GiB > VG UUID aLamHi-mMcI-2NsC-Spjm-QWZr-MzHx-pPYSTt > > [root@controller ~]# rpm -qa |grep pacem > pacemaker-cli-1.1.13-10.el7_2.4.x86_64 > pacemaker-libs-1.1.13-10.el7_2.4.x86_64 > pacemaker-1.1.13-10.el7_2.4.x86_64 > pacemaker-cluster-libs-1.1.13-10.el7_2.4.x86_64 > > > [root@controller ~]# lvs > LV VG Attr > LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert > volume-1b0ea468-37c8-4b47-a6fa-6cce65b068b5 cinder-volumes -wi-a----- > 1.00g > > > [root@compute1 ~]# lvs > LV VG Attr > LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert > volume-1b0ea468-37c8-4b47-a6fa-6cce65b068b5 cinder-volumes -wi------- > 1.00g > > > thank you very much! > > > > > > _______________________________________________ > Users mailing list: Users@clusterlabs.org > http://lists.clusterlabs.org/mailman/listinfo/users > > Project Home: http://www.clusterlabs.org > Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf > Bugs: http://bugs.clusterlabs.org > -- Digimer Papers and Projects: https://alteeve.ca/w/ What if the cure for cancer is trapped in the mind of a person without access to education? _______________________________________________ Users mailing list: Users@clusterlabs.org http://lists.clusterlabs.org/mailman/listinfo/users Project Home: http://www.clusterlabs.org Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf Bugs: http://bugs.clusterlabs.org