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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135 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
75 views

DRBD protocol c and split brain

According to DRBD documentation of replication mode. Protocol C. Synchronous replication protocol. Local write operations on the primary node are considered completed only after both the local and ...
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2answers
728 views

DRBD stacked resources: recovering from failure

We're running a stacked four-node DRBD setup like this: A --> B | | v v C D This means three DRBD resources running across these four servers. Servers A and B are Xen hosts ...
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2answers
552 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
276 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
221 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
101 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
100 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
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1answer
373 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
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1answer
500 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
95 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 ...
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1answer
87 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 ...
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1answer
341 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 ...
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1answer
301 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 ...
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1answer
433 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
129 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 ...
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1answer
82 views

How to configure DRBD to work like standalone node, but synchronizing

I want the DRBD performance like a standalone node, but synchronizing, understand as: Asynchronous replication protocol. Local write operations on the primary node are considered completed as soon as ...
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1answer
448 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. ...
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1answer
611 views

PacemakerDRBD Mount Issue

We are stuck trying to get pacemaker to work with DRBD, and having tried various alternatives can't get our "drbd1" to mount and get some errors. NOTE: we are trying to get pacemaker to work with an ...
0
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1answer
243 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 ...
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1answer
156 views

Configure DRBD and Heartbeat on Cpanel

I am working to setup a high availability cPanel server. I have two servers on same data center. The cPanel server has got 150 websites and 15 ip addresses where 1 is main shared ip and 14 other ...
0
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1answer
215 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 ...
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1answer
437 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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0answers
19 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 ...
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0answers
760 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
118 views

Pacemaker with drbd split-brain on two nodes

Gentlemen, I have a question concerning active/passive split-brain when using pacemaker with drbd. I realize that split-brain is a long topic, but i am trying to solve one exact situation: if both ...
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0answers
51 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 ...
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0answers
55 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 ...
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0answers
147 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 ...
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0answers
168 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
43 views

GFS2 without LVM on CentOS 5.7

I am using DRBD and I just synced 40GB between 2 nodes for the last 3 days and I am using GFS2 without LVM, I formatted the partition just fine but now I can't mount it /sbin/mount.gfs2: invalid ...
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0answers
139 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): ...
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0answers
30 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 ...
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0answers
54 views

Are there any known issues with different versions of DRBD running on different nodes in the same cluster?

We have two database servers, as part of some trial we tried using Dell Fusion IO disks as the database / logs disks. We've experienced some problems and Dell were not able to resolve them so we're ...
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0answers
24 views

Repair tables after pacemaker + drbd migration/failover

I have a master/slave pacemaker/drbd cluster that handles mysql, apache, and some other stuff. I'd like to have mysql automatically repair tables (mysqlcheck -A --auto-repair or similar) after ...
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0answers
152 views

DRBD show StandAlone on Primary node after secondary node attach with it?

I am using Centos5.4 & DRBD8.2.6 heartbeat2.1.3 & one java program with Mysql & Asterisk1.6.2.6. On DRBD disk i put 2 service Asterisk & Mysql. SO if DRBD Disk not up both services ...
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0answers
92 views

Timeout on heartbeat STONITH (IPMI fencing)

I am managing a two node heartbeat DRBD+MySQL+FreeRADIUS cluster. I am currently using external/ipmi fencing as my STONITH solution. However, I am running into a problem where the primary node has a ...
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0answers
44 views

DRBD mount randomly unmounts itself

We have setup setup an NFS HA "cluster" using drbd/heartbeat. Everything works as expected when tested... If the instance nfs1 goes down, nfs2 picks up and everything seems to be fine. On both ...
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330 views

drbd ubuntu drbd 8.3.7 -> 8.3.11, 10.04 ->12.04

I want to upgrade a two node cluster, without downtime of the complete drbd node. One node is already upgraded to ubuntu 12.04 - drbd 8.3.11 - kernel 3.2.0 The other node is running ubuntu 10.04 - ...
0
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0answers
287 views

Failover clustering without losing client connections

I need to deploy an FTP server in a high-availability configuration. So far I've used Windows Failover clustering (using Win 2k8 Enterprise) and DRBD in Linux. Both do enable me to develop a failover ...
0
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0answers
384 views

How to specify install device in anaconda / kickstart CentOs 5.5

I am building a CentOS 5.5 install disc designed to install on a DRBD device root fs. Everything works fine except I am unable to tell anaconda to recognize /dev/drbd0 as a valid block device for ...