CMAN is a Corosync plugin that monitors the names and number of active cluster nodes in order to deliver membership and quorum information to clients.

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Zabbix web interface says Zabbix server is offline when failing over to passive node

Two Zabbix 2.4 servers using CentOS 6.6 with an external MySQL DB, both servers are configured to connect to this DB when they are running. I followed a combination of Zabbit High Availability guide ...
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Corrupt qcow2 files on Ubuntu/CMAN/Pacemaker/OCFS2 Cluster

I configured a 2-node cluster based on Ubuntu 12.04 LTS. The 2 servers are connected through Fibre Channel(HP 82E 8Gb 2-port PCIe Fibre Channel HBA) to a HP MSA 2040 SAN. Server 1 is a HP DL380 G6. ...
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236 views

How can CMAN restart after a network failure

I try to configure a 3-nodes HA cluster with pacemaker/cman on centos 6.5. STONITH is disabled (pcs property set stonith-enabled=false). When I simulate a network issue (iptables -A INPUT -s ...
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807 views

redhat cluster failover not working (corosync [TOTEM ] Retransmit List)

I'm using following: [root@kpdbm01 ~]# cat /etc/redhat-release Red Hat Enterprise Linux Server release 6.5 (Santiago) [root@kpdbm01 ~]# uname -a Linux kpdbm01 2.6.32-431.20.3.el6.x86_64 #1 SMP Fri ...
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Advantages and use of cman cluster [closed]

Can anyone tell me what are the advantages of cman cluster and what is a node meant while configuring a server. Does a node identify a server? or how is it? I want to configure a cman cluster with ...
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529 views

CMAN: using SBD (Storage Based Death) and watchdog as STONITH

I'm building up a 2-node cluster based on CMAN + Pacemaker cluster stack, but I have no hardware STONITH devices. However both nodes are connected to a shared storage via iSCSI and I would like to use ...
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583 views

OCFS2/GFS2 dlm_join_lockspace no fence domain

Ripping my hair out on a new Pacemaker/cman/(OCFS2|GFS) config. I can't use the Pacemaker integration with OCFS2, since the Fedora team, in their wisdom, decided to remove the .pcmk. Supposedly, I ...