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Questions tagged [rhcs]

The Red Hat cluster suite includes software to create a high availability cluster. It enables applications to be highly available by reducing downtime and ensuring that there's no single point of failure in a cluster. It also isolates unresponsive applications and nodes so they can't corrupt critical enterprise data.

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RHCS: GFS2 in A/A cluster with common storage. Configuring GFS with rgmanager

I'm configuring a two node A/A cluster with a common storage attached via iSCSI, which uses GFS2 on top of clustered LVM. So far I have prepared a simple configuration, but am not sure which is the right way to configure gfs resource. Here is the rm…
Pavel A
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Disable fencing in RedHat Cluster?

Whilst I'm developing with RedHat Cluster, I'd like to be able to disable fencing completely. The documentation for this stuff is fairly lacking - can I do this at all, or should I be looking to fake up a null fencing method of some sort?
Jon Topper
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What fence device setup would prevent a mutual-STONITH in a two-node RHEL cluster?

I've got a Red Hat cluster (corosync+rgmanager) software on RHEL 6.6 on physical Dell servers with iDRAC. This cluster is for stateless application (stunnel, a TLS gateway), so it doesn't need and doesn't have any shared disk. I prefer to keep this…
kubanczyk
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Why to use fencing when you already have redundant communication links?

This article stays that you should use both fencing (aka STONITH) and redundant communication links. I'm trying to understand what benefits STONITH gives in case of split-brain. Consider for example you have node A, node B, STONITH device that are…
andrershov
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Why has Red Hat Cluster Suite stopped working?

I've been testing the Cluster Suite on CentOS 6.4, and had it working fine, but I noticed today [8th August, when this question was originally asked] that it's not liking the config that was previously working. I tried to recreate a configuration…
Iain Hallam
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How can I run a CentOS (Red Hat) cluster in degraded mode?

I've installed Red Hat's cluster software on an install of CentOS 6.5, and use it to provide redundant routing from one network to another. This works fine, and I have a pair of boxes providing the service, so that if one fails (for example, if I…
Iain Hallam
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Running a service in ALL RHCS cluster nodes

I'm tryng to configure a service to be run in all nodes of a RHCS. I've tried placing the service without failover domain, but it appears to run only in one node
user287840
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RedHat 6 Cluster Failover

I'm testing the RedHat Cluster Administration tool documented here: https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Cluster_Administration/index.html I have two virtual machines running CentOS 6.4. I've been…
Scott Crooks
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shared file system with rhcs

We have 2 node cluster which is attached with storage to share single parition between both cluster node. So for that we configure rhcs with gfs2. We aaded resources with gfs and ip address. So when first time I ask cluster services it represent on…
Ben
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Red-Hat Cluster failover notification?

Is there anyway to get a notification / setup a notification mechanizem when the cluster fails over?
soulSurfer2010
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Red Hat cluster: Failure of one of two services sharing the same virtual IP tears down IP

I'm creating a 2+1 failover cluster under Red Hat 5.5 with 4 services of which 2 have to run on the same node, sharing the same virtual IP address. One of the services on each node (called disk1 and disk2 in cluster.conf below) needs a (SAN) disk,…
js.
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Considerations for certificate revocation for intermittently isolated ad-hoc networks

I'm trying to decide on a certificate revocation strategy for a solution I'm designing (that will utilize Dogtag PKI, per customer request). The obvious choices seem to be using a CRL or using OCSP. I'm trying to understand the practical…
G__
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RHCS 5 NFS cluster node not releasing TCP 2049 on relocate

Imagine if you will you have a 2 node Red Hat NFS Cluster; each node is RHEL5.4 64bit and they share a SAN LUN for the data. The primary interface on each server is HA failover bonded (bond0, eth0+eth1) and there is a standard floating cluster…
user15590
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Red-Hat Cluster doesnt migrate services on node shutdown

I have a RHCS with two nodes and manual fencing. when I restart Node 1 (the primary) it migrates both services to Node 2 automatically. but when I shutdown Node 1, it doesnt happen and I need to use fence_ack_manual to fence Node 1 and then services…
soulSurfer2010
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HP ILO and Vmware ESXi, how to assign HP ILO to specific virtual guest machine?

I m using RHCS, and one of the important part is to have fencing working for my environment. Normally using a physical server, i can simply used the ILO as my fence device. However as guest machine inside esxi, sending reboot instruction via ILO…
abi aqil
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