similar to: Fencing question(s)

I'm creating a firewall HA cluster. The proof of concept for the basic firewall cluster is OK. I can bring up the cluster, start the iptables firewall, and move all of this with no problem. I'm using Conga to do all of this configuration on Centos 6.3 servers. To extend the "HA" part of this, I'd like to use bonded channels instead of plain old NICs. The firewall uses

I think I know the answer to this question based on all of the research I've done, but figured I'd ask anyway. I needed a couple of servers for an HA cluster, and our "order" guy here ordered me a couple of Dell PowerEdge T110 II. I'd planned on using IPMI to fence these things with, but later found out that this model is only one of two PE servers Dell sells that has a

Hi. I'm new to configuring Clustering . The CentOS 5.5 guest machines will be running on ESXi 4.1 . I'm configuring the clustering using "Conga" . I see that there is support for using ESX to do the fencing. The problem I have is that the guest machines are not allowed to have access the "management network" as per security policies. The guest machines don't no

I'm desparately looking for more ideas on how to debug what's going on with our CLVM cluster. Background: 4 node "cluster"-- machines are Dell blades with Dell M6220/M6348 switches. Sole purpose of Cluster Suite tools is to use CLVM against an iSCSI storage array. Machines are running CentOS 5.8 with the Xen kernels. These blades host various VMs for a project. The iSCSI

Hi all, A recent update to CentOS 5.9 has broken my cluster's ability to fence nodes. I have two Dell's which are both fenced via their DRAC6 cards. The current configuration in cluster.conf for the fencing devices is: <fencedevice agent="fence_drac5" cmd_prompt="admin1-&gt;" ipaddr="192.168.251.11" login="fencer" name="ms1-drac"

Hi all, I'm happy to announce a new tutorial! https://alteeve.com/w/2-Node_Red_Hat_KVM_Cluster_Tutorial This tutorial walks a user through the entire process of building a 2-Node cluster for making KVM virtual machines highly available. It uses Red Hat Cluster services v3 and DRBD 8.3.12. It is written such that you can use entirely free or fully Red Hat supported environments.

Hi all, I'm happy to announce a new tutorial! https://alteeve.com/w/2-Node_Red_Hat_KVM_Cluster_Tutorial This tutorial walks a user through the entire process of building a 2-Node cluster for making KVM virtual machines highly available. It uses Red Hat Cluster services v3 and DRBD 8.3.12. It is written such that you can use entirely free or fully Red Hat supported environments.

Hi, I need to create a real-time replication of a partition between two servers with centos 6.4, I am researching and finding difficulty with drbd, corosync, someone indicate material, do not need to run script automatically if a node drops only replicate. Grateful. -- Sergio.Alex

On 22/06/16 01:01 AM, Tom Robinson wrote: > Hi, > > I have two KVM hosts (CentOS 7) and would like them to operate as High Availability servers, > automatically migrating guests when one of the hosts goes down. > > My question is: Is this even possible? All the documentation for HA that I've found appears to not > do this. Am I missing something? Very possible. It's

Hi, I have two KVM hosts (CentOS 7) and would like them to operate as High Availability servers, automatically migrating guests when one of the hosts goes down. My question is: Is this even possible? All the documentation for HA that I've found appears to not do this. Am I missing something? My configuration so fare includes: * SAN Storage Volumes for raw device mappings for guest vms

I am not sure this is the proper forum for this question, feel free to redirect me if you like to the correct place. I have the following setup: vmware esxi 2 CentOS 5.3 servers (vmware virtual hosts) these 2 servers are running conga(luci, ricci) and the rest of the cluster suite with a simple IP address setup to failover for testing. My problem comes in when I need to setup fencing for

Roger, Thanks for your reply. As I understand it, for reliable fencing a node cannot be responsible for fencing itself, as it may not be functioning properly. Hence my "cross over" setup. The direct USB connection from Webserver1 to UPS-Webserver2 means that Webserver1 can fence (cut the power to) Webserver2 if the cluster software decides that it is necessary. If my UPSes were able to

Hi list, I'm new to clustering, and I'm running a little cluster at home. The cluster is running on a workstation hardware and running on Centos 6.5. Component: corosync, pacemaker, drbd and pcs. All works good. This cluster has different resources: 1) drbd0 2) drbd1 3) drbd0_fs 4) drbd1_fs 5) pgsql 6) smb + nmb 7) libvirt (lbs) 8) libvirt_guests (lsb) I've this constraint

took a couple months off due to road blocks, hoping a fresh look would allow me to use my server as desired. I have three ports, eth0-2 over two nics. I want to bond them, and then use a bridge to connect to virtual machines on the virtual host computer. Never having done this, I am confused on some parts. Here is where I am at now and any pointers helpful. Single server, centos 6.x My issue

Hello List, Any suggestions to solve the following would be most appreciated. Setup: Active/Passive Two Node Cluster. Two UPSes (APC Smart-UPS 1500 C) with USB communication cables cross connected (ie UPS-webserver1 monitored by webserver2, and vice versa) to allow for stonith/fencing OS OpenSuse Leap 42.2 NUT version 2.7.1-2.41-x86_64 Fencing agent: external/nut Problem: When power fails to a

Hi, I am trying to build a rock solid XEN High availability cluster. The platform is SLES 11 SP1 running on 2 HP DL585 both connected through HBA fiber channel to the SAN (HP EVA). XEN is running smoothly and I''m even amazed with the live migration performances (this is the first time I have the chance to try it in such a nice environment). XEN apart the SLES heartbeat cluster is

Are there any updated instructions for installing Windows virtio drivers on a KVM Windows XP vm under CentOS6? The virtio .iso directory structure is slightly different from what is described in the RHEL6 virtualisation manual, and when I attempt to install e.g. the viostor driver, the device manager cannot find anything better than what is already installed. I tried each of the

Hi, According to comments in file fs/ocfs2/cluster/quorum.c:70 about the self-fencing operations : /* It should instead flip the file ?* system RO and call some userspace script. */ So, I tried to add it (but i did'nt find a way to flip the fs in RO). Here is a proposal for this functionnality, based on ocfs2-1.4.7. This patch add an entry 'fence_cmd' in /sys to specify an

I'm interested in the idea of sharing a bunch of SAS JBOD devices between two CentOS servers in an active-standby HA cluster sort of arrangement, and found something about using scsi3 persistent reservations as a fencing method. I'm not finding a lot of specifics about how this works, or how you configure two initiator systems on a SAS chain. I don't have any suitable

Hi, I think this would be the best forum, let me know if not. I am in the middle of writing fencing scripts for Citrix XenServer virtual machines (specifically for use with Redhat Clustering, but will also work from pacemaker etc) and I noticed that XCP uses the same XenAPI (from what I can tell). Just wondering if someone would be able to test the scripts on XCP and let me know if they work.