DRBD is a Distributed Replicated Block Device. Developed by LinBit it is now part of the standard-linux-kernel. Regard it as RAID 1 across an IP-network using any type of block device. Normally only the "primary" side can write.

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176 views

DRBD(-alike) solution to enable failover for spool files

Im about to setup a failover-setup for our Kannel service using hardbeat and DRBD. One machine is the primary one, when that one dies/goes down, it switches to the secondary. Kannel is using a spool ...
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2answers
597 views

Debian 7: HA NAS with pacemaker, drbd and iSCSI

I currently am trying to make a highly available NAS under debian 7. I am using following packages: drbd8-utils iscsitarget iscsitarget-dkms pacemaker corosync ...
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2answers
546 views

Infiniband, SRP and failover

I am considering an linux-based infiniband storage setup, but I am tripping over whether or not I can do active/passive or active/active failover with DRBD and SRP targets. I am led to believe that ...
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2answers
144 views

Linux partitioning suggestion for failover setup?

I've been using Ubuntu for a while but didn't really paid attention on partitioning and just accepted the defaults. But on a new project we plan on setting up two old servers HP DL380 G3 both would ...
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2answers
918 views

Advice for IMAP failover to secondary server

I've recently been given the task of configuring an IMAP based e-mail server solution that incorporates failover to a backup server. I have experience in this area, but it's all been single server ...
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2answers
179 views

DRBD - no resources defined

I have some problems getting a drbd cluster running. When I want to start creating my storage, i get the following error: root@raspberrypi-ha1~# drbdadm create-md drbd1 no resources defined But ...
0
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2answers
574 views

the pacemaker can't start the drbd resource

here is crm the configure show [root@node1 /]# crm configure show node node1 node node1.mycluster.org node node2 node node2.mycluster.org primitive Apache apache \ params configfile="/etc/...
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2answers
486 views

Using DRBD with 100mbit uplink

we are planing to use drbd to sync two servers (different hardware) to get kind of HA in case the master server dies. The servers are hosted physically in the same datacenter (Hetzner in germany) and ...
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2answers
58 views

DRBD Setup on 2 node CentOS 6.8

I have installed and configured DRBD on 2 centos nodes and after creating the metadata when i try to start the drbd service, its complaining that the module is not loaded. See below for more details. ...
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2answers
309 views

DRBD Dual-Primary Obstacles

I have DRBD installed and configured on two different servers, everything is working as expected but I am having a horrible I/O disk read/write speed and network latency like crazy, my shared ...
2
votes
1answer
42 views

How to migrate Proxmox VM to other computer in cluster?

UPDATE 2: After getting the error: drbd error: Object not found I tested something out. Initially I had 2 network cables connected between the 2 desktops. 1 of them connected the 2 desktops and ...
2
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1answer
1k views

DRBD LVM - backed vs. physical & LVM filter

We're experimenting with DRBD/pacemaker on top of an existing Debian 6 Encrypted RAID1 setup. We have one comparatively general and one comparatively specific question: 1) DRBD - backed vs. ...
2
votes
1answer
536 views

DRBD keeps crashing over saturated link

Under high I/O DRBD will crash and take server down; is there anyway to optimize DRBD to prevent from happening again. listed below is my current config, errors and specs. if you need any more ...
2
votes
1answer
464 views

Need an interface for an Elastic IP (DRBD & EC2)

We are trying to mirror a volumes over a geographical zone using DRBD (and Ubuntu 11.10). We are using elastic IP's - however there is no local interface for Elastic IP's - only an interface for a ...
2
votes
1answer
654 views

Ubuntu Server mdadm drbd ocfs2 kvm hangs under heavy file reading

I have deployed four ubuntu 10.04 server. They are coupled two by two in a cluster scenario. on both sides we have software raid1 disks, drbd8 and OCFS2 and on top of it some kvm machines run with ...
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1answer
82 views

Set up DRBD to replicate root LVM volume

I have a server using /dev/vg1/root as its / mount. I am trying to set up DRBD so that ServerA's vg1-root is mirrored to another LVM volume on ServerB, vg1-ServerA-root. I am able to create the ...
1
vote
1answer
181 views

Installing DRBD on XEN CentOS 5.8 (Stable)

I am trying for days to achieve HA with fault tolerance between my existing two XEN VPS's one located in Tokyo and the other located in US (both have the same setup and the same configurations, I am ...
1
vote
1answer
125 views

DBRD dual primary Heartbeat resource management

I have the following setup: Two servers with DRBD running dual primary with OCFS2 Heartbeat with two virtual ips, one for each server Round robin DNS to load balance NFS across the two vIPs ...
1
vote
1answer
552 views

Pacemaker corosync 2-node with a 3rd for quorum

I'm having trouble figuring out how to configure a 2-node setup with a third simpler one for quorum. It seems to think all the nodes have the capability to act as a full fallback node, when I only I ...
1
vote
1answer
727 views

STONITH with a DRBD/Pacemaker/Corosync 2 node cluster

So I am seeing a lot of conflicting viewpoints out there on using STONITH with a 2-node DRBD/Pacemaker/Corosync cluster for replicating MySQL data. The example I could find on the Pacemaker website ...
1
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1answer
197 views

how to extend the DRBD device online on production server?

Hey folks i am trying to extends the size of DRBD device (/dev/drbd0) online on production server but have to bring down and up the device (/dev/drbd0) twice so the change in size is detected. I ...
0
votes
1answer
61 views

Passing SAN Storage to Virtual Machine in active/passive HA Cluster

I need to attach a fibre channel SAN disk to one virtual machine that resides on an active/passive cluster (pacemaker, corosync). As it is the backup storage, corruption has to be strongly avoided. ...
0
votes
1answer
233 views

DRBD always causing splt brain after restart

I'm absolutely new to the whole cluster topic (pacemaker with DRBD, etc) and in general new to linux (using it on a daily basis for about two months now). Actually I'm playing around with a simple ...
0
votes
1answer
186 views

DRBD/Corosync mysql clutser

I have configured HA cluster on two nodes host1 and host2. host1 is master and host2 is slave. If I shutdown host1 then host2 never comes up as master until I restart openais service. Some time I ...
0
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1answer
749 views

OpenVZ - vzdev kernel module issue

I am setting up a Centos 6.3 minimal server with openvz that replicates to another machine using DRBD. I want all openvz data/files to be kept in a single /vz directory which is an LVM that I am ...
0
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1answer
310 views

drbd master/master without cluster FS

I have planed to use master-slave setup and make nightly backups (just coping data) from slave node to 3rd node. As I understand in master-slave mode it is impossible to read data from slave node? So ...
0
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1answer
504 views

DRBD Replication failure

A couple of weeks ago I setup a 2 nodes CRM system with one of the resources managed being MySQL over DRBD. Today for maintenance reasons I restarted both nodes but now they can't connect to each ...
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votes
0answers
2k views

Pacemaker DRBD resource not getting promoted to master on any node

First off, I'm no linux specialist, I've been following tutorials and been working with the help of google, this worked out fine until now, but currently I'm stuck with a problem. I'm using CentOS 6.5 ...
2
votes
0answers
58 views

Dual primary DRBD with LUKS encryption

Is it possible to create a LUKS encrypted filesystem that is accessible by both nodes of a dual primary DRBD system? Here is what I tried to do: Create two nodes and establish a partition on each ...
2
votes
0answers
597 views

DRBD + corosync + pacemaker - Servers won't connect after failover

I got 2 servers configured with drbd, corosync with pacemaker. It is all working fine, primary server gets secondary if it fails, and secondary gets primary. But if the 1st server comes up again ...
2
votes
0answers
145 views

High Availability/failsafe two different locations

I am wondering if someone could help with the setup that does not seem so difficult. I am just beginning with the multi-server setup. I apologize if my questions are dumb. I have two debian servers ...
2
votes
0answers
2k views

LVM DRBD Shared between nodes proxmox

Context : I have proxmox cluster with the volume group shared with drbd for the VM - KVM. I have a problem with drbd. Indeed, when a node disconnect, the associate link between the differents nodes ...
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0answers
482 views

DRBD server not starting - error in creating netlink socket

I have a newly configured DRBD-Cluster 8.4.5 on 2 VM running ubuntu 14.04, following this example: http://geekpeek.net/configure-drbd-ubuntu/ Unfortunatelly I can not start the service. It seems to ...
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0answers
138 views

Run Server from Clustered File Server DRBD & GFS2

We are trying to eliminate a single point of failure for our files without a SAN. We currently have a single server for file serving (locally), web server, and database (in VM). Looking at using DRBD ...
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0answers
30 views

DRBD device temporarily disappearing across different kernel versions?

After upgrading from an old kernel to a new kernel version and booting into the new kernel the DRBD logical device was gone. Think nothing under /proc/drbd. This is a major problem as I have DRBD ...
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0answers
233 views

DRBD network requirements

We currently have a DRBD based replication on an pair of Asterisk servers, where we use DRBD for file and MySQL data replication on an active/passive usage scenario, using protocol B (semi-synchronous)...
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0answers
192 views

DRBD heartbeat's resource role trouble in centos 5.4 by mysql files owner change?

I am using 2 machines with centos,mysql,drbd,heartbeat,asterisk. node 1 has hdc :SAMSUNG HD160JJ/P, ATA DISK drive kernel version 1 SMP Tue Aug 21 17:50:26 EDT 2012 kernel release 2.6.18-308.13.1....
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0answers
186 views

Any production experience with DRDB dual primary?

In order to avoid having to setup a NAS system, I am considering the possibility of setting up a dual-primary with DRBD to handle RAID1 over IP. Concerning filesystems, I know of OCFS and GFS as ...
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0answers
31 views

Configure STONITH for esxi host CentOS guests

I am just doing some initial researching into STONITH and am finding that it can require Hardware to reset the failed nodes. Something called an IPMI can be used. I was wondering how something like ...
0
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0answers
38 views

Adding network-fault tolerance to drbd or drbd alternatives

I've been working with drbd for about a year now, and at this point I'm tearing my hair out in frustration. Every time there is a network fault (something that is disappointingly common in the ...
0
votes
0answers
590 views

DRBD what is the meaning of warning “nothing to do in stacked mode”

We just installed DRBD on one node (the second one is not installed). After doing drbdadm primary theres service drbd start everything is ok (resource available) but the following warning message ...
0
votes
0answers
365 views

CentOs 6.5 GFS2 DRBD SAMBA CTDB : g_lock_force_unlock: Could not store record: NT_STATUS_UNSUCCESSFUL

My SAMBA cluster is unreliable, I noticed that from Windows desktop (on some occasion works fine but it is not reliable), on Ubuntu I'm getting this error (same is keep repeating in the log): [root@...
0
votes
0answers
37 views

Is it safe to upgrade a current mysql CentOS 6.0 server to CentOS 6.5?

This server has specific configuration of php, it is also acting as a node in a DRBD cluster which holds a critical MYSQL database. I wanted to know if this procedure is safe and if there are any ...