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Questions tagged [drbd]

DRBD refers to block devices designed as a building block to form high availability (HA) clusters.

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Setting up Pacemaker (pcs) with DRBD

I am working on a high-availability NFS passive-active cluster with two nodes. I am on RHEL 7.6. Both nodes have DRBD setup on them with two partitions, /prod (/dev/drbd0) and /base (/dev/drbd1). The ...
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Pacemaker cluster service can't start properly Couldn't mount filesystem

I have 3 nodes MySQL cluster on RHEL 7.5 with DRBD, Pacemaker and after start cluster getting following error. How can I overcome ? [root@db1 ~]# pcs status Cluster name: mysql_cluster Stack: ...
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RPM making error from

When I am building drbd-utils-9.5.0 rpms from source offline and I am getting error "No such file or directory" as follows. So how can I build rpms offline resolving the issue ? [root@db1 drbd-...
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177 views

DRBD comes up after reboot with Connected Diskless/Diskless

After an unattented power loss, facing a major issue, every reboot the DBRB comes up with Connected Diskless/Diskless status. main problems: dump-md response: Found meta data is "unclean" ...
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176 views

split-brain recovery with crm-fence-peer script

I implemented DRBD resource level fencing with crm-fence-peer.9.sh and crm-unfence-peer.9.sh scripts on both nodes. Now, I have the following situation on my lab nodes: both nodes otrs1 and otrs2 ...
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140 views

drbd data: failed to create debugfs dentry

CentOS 7 kernel release 3.10.0-957.el7.x86_64 drbd 9.0.16-1 Have one resource configured. drbd servicve is not enabled to start at boot time. I reboot the two nodes. One the first node I run ...
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27 views

DRBD 9 internal-metada vs makefs

Here are the steps I followed to create a two node DRBD 9 setup: Create LVM On each node created internal meta-data with drbdadm create-md 'resourcename' On each node brought the resource up with ...
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31 views

What is the default role for DRBD nodes

I have upgraded a node in a two-node DRBD cluster as follows: reinstall Debian apt-get install drbd-utils systemctl start drbd obtain /etc/drbd.d/my_resource.res from backup configure block device (...
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338 views

putting standby node online results in drbd split brain

I have 2 node cluster on pacemaker/corosync running on scientific linux 6. drbd is running on both nodes master=node1 slave=node2. When i put the slave node2 on standby and then back online everything ...
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236 views

What is the best way to explain this LVM output?

I bumped into the issue two days ago about RAID issue on my TS-251+ QNAP. I do not really bother the box until the problem comes. I explored details to find out what type of RAID, how RAID/LVM ...
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1answer
1k views

DRBD no output of cat /proc/drbd

I sync my new disk, output of drbdtop: Resource: myres: (Overall danger score: 14) Local Disc(Primary): volume 0 (/dev/drbd0): UpToDate(normal disk state) volume 1 (/dev/drbd1): UpToDate(normal disk ...
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174 views

Why does udev concatenate two symlinks?

My distribution is SLES 12 SP 2. I work with DRBD (distributed replicated block device) right now. Here is an example of a configuration for a drbd resource. resource HA1dat { device /dev/drbd1; ...
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6k views

warning /dev/centos/root swap centos-root does not exist — after configuring DRBD

I configured DRBD on default CentOS 7.3 Installation like following: /dev/centos/home was taking all the space in sda2 so reduced it and created /dev/centos/home (20% space) and /dev/centos/drbd (...
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284 views

Drbd issue - is it by design?

On fresh drbd setup (no filesystem on drbd0, just synced) I have invalidated "node2" state and full sync started: root@node1:~# drbdadm invalidate-remote drbd0 root@node1:~# drbd-overview 0:drbd0/0 ...
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256 views

How to use /dev/sdb with DRBD?

Setting-up DRBD on CentOS 7 now. The configuration is: resource testdata1 { protocol C; on node1 { device /dev/drbd0; disk /dev/sdb; address 198.19.0.1:...
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1k views

increase LVM and DRBD

I have two CentOS7 VMs in Primary/Secondary state. My goal is to increase DRBD block size. for that I did these steps: 1. added new HD. 2. created new Partition with fdisk - formatted as LVM (/dev/...
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706 views

Pacemaker doesn't failover

node $id="10" db10 \ attributes standby="off" node $id="9" db09 \ attributes standby="off" primitive drbd_jenkins ocf:linbit:drbd \ params drbd_resource="r0" \ op start interval="0s" ...
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310 views

correct method to corrupt super block in ext3 filesystem associated with drbd

I am trying to simulate file system super block corruption. During this experiment I could not understand the difference between below super block corruption. Please help to know the difference. A ...
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1answer
457 views

Pacemaker Promote Groups in Specific Order - Or Specify start last

I have a group in Pacemaker which I need to start last. Ideally I'd like to know how to configure groups to start in an specific order, but I can't seem to figure it out, not sure if its possible. ...
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1answer
899 views

100% CPU utilisation and hang after virsh migrate

I've been experimenting with ZFS + DRBD + live migration (I want to understand it well enough to write my own automation scripts before I start playing with ganeti again, and then openstack cinder). ...
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1k views

MySQL Server monitor_20000 on node1 'not running' - HA Cluster - Pacemaker - Corosync - DRBD

I get this Error after finishing configuring cluster. And after trying to fail-BACK from node2 mysql_service01_monitor_20000 on node1 'not running' (7): call=20, status=complete, exitreason='none' ...
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469 views

Xen + DRBD + Pacemaker on Centos7

So my current environment is centos7 on a pair of identical bare metal servers. I've installed drbd and carved up 3 x 100G block devices for DRBD to mirror. Then I installed a Centos7 image on one of ...
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5k views

DRBD - 'node1' not defined in your config (for this host) - Error when setting Primary [closed]

I am getting the following error when trying to set the Primary node for DRBD. 'node1' not defined in your config (for this host). I know this is related to DNS/Hostname/Hosts and the config ...
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92 views

Umask not respected in OCFS2 filesystem

I encountered some strange behavior on a machine that uses a replicated block device (via DRBD) along with OCFS2 to allow concurrent mounts on multiple machines. The issue, in short, is that new files ...
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409 views

Create new physical volume using lvm

I have Linux Mint 17.2 codename Rafaela running as a virtual machine with a disk size of 30GB. I used the default LVM installation. I would like now to create a physical volume /dev/drbd0 to use it in ...
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4k views

DRBD Failure: (127) Device minor not allocated

I use wmware workstation to run two virtual machines with OpenVZ 2.6.32-042stab108.2 installed on top on CentOS 6.6. I have created another primary partition, /dev/sda4, to configure it as drbd ...
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292 views

Move Root Folders to DRBD

What folders in the root folder ( "/" ) cannot be moved to a clustered file system (using DRBD and probably GFS2)? Would like to setup a basic cluster to increase uptime for our file server, web ...
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1answer
1k views

Why did Red Hat drop support for DRBD beginning with RHEL 7?

Does anybody know the reasons why Red Hat decided to drop support for DRBD beginning with RHEL 7, thus favoring GlusterFS as the preferred solution for network-based replication / mirroring in a ...
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1answer
2k views

drbd can't start resync

This is my situation On both nodes cat /etc/drbd.d/* resource clustervol { device /dev/drbd1; disk /dev/sdb1; meta-disk internal; on iscsi1 { address 192.168.0.30:7790; } on iscsi2 { address ...
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481 views

Float MAC address in Heartbeat format

It's been about a month where I've been working with "High Availability" on Elastix based on DRBD and Heartbeat. As you maybe be familiar with it, there is a file in Heartbeat called haresources that'...
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2k views

CentOS 6 drbd is not available

In CentOS 6 (6.6), the drbd package is not available, neither from the extras repository. There is some information on the Net, like configure-drbd-centos-6-5, which I assume will work on CentOS 6.6....
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959 views

Installing DRBD on Redhat 5

I am trying to install DRBD on Redhat 5. Everything i find is out of date, and all the files are not hosted anymore. From what I understand I need to install the Cent OS repositories to install DRBD ...
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122 views

DRBD8 and GFS on CentOS5

I am trying to combine DRBD8 and GFS2 on CentOS5. Is there any possibility to do this without using a mulicast-cluster underneath? (CentOS seems to use AIS) This is a two-node-cluster, so a simple ...