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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. Any help is appreciated.

[root@nfs-node1 yum.repos.d]# service drbd status drbd not loaded

[root@nfs-node1 yum.repos.d]# drbdadm up clusterdb Could not stat("/proc/drbd"): No such file or directory do you need to load the module? try: modprobe drbd Command 'drbdsetup 0 disk /dev/sda3 /dev/sda3 internal --set-defaults --create-device' terminated with exit code 20 drbdadm attach clusterdb: exited with code 20

[root@nfs-node1 yum.repos.d]# modprobe drbd FATAL: Module drbd not found.

[root@nfs-node1 yum.repos.d]# service drbd start

Starting DRBD resources: Can not load the drbd module.

[root@nfs-node1 yum.repos.d]# uname -a Linux nfs-node1 2.6.32-431.el6.x86_64 #1 SMP Fri Nov 22 03:15:09 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux

[root@nfs-node1 yum.repos.d]# rpm -qa | grep drbd kmod-drbd83-8.3.16-3.el6.elrepo.x86_64 drbd83-utils-8.3.16-1.el6.elrepo.x86_64 [root@nfs-node1 yum.repos.d]#

[root@nfs-node1 yum.repos.d]# cat /etc/redhat-release CentOS release 6.8 (Final)

DRBD Configuration:

resource clusterdb { startup { wfc-timeout 30; outdated-wfc-timeout 20; degr-wfc-timeout 30; } net { cram-hmac-alg sha1; shared-secret sync_disk; } syncer { rate 10M; al-extents 257; on-no-data-accessible io-error; } on nfs-node1 { device /dev/drbd0; disk /dev/sda3; address 192.168.1.1:7788; flexible-meta-disk internal; } on nfs-node2 { device /dev/drbd0; disk /dev/sda3; address 192.168.1.2:7788; meta-disk internal; } }

I have done this setup before without any problems. The only thing i'm doing differently here is that there is no network connection between the two nodes yet. I wanted to finish off the configurations first before i make the connections.

Thanks!

Syed Quadri
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2 Answers2

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You don't have the drbd module in your kernel. That is most likely a separate module in your CentOS package manager. So you need to find the kernel module and install it.

Tero Kilkanen
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  • Thanks for your reply. I did a yum search on that earlier and tried installing the module but it says its already installed and latest. – Syed Quadri Jun 19 '16 at 18:39
  • [root@nfs-node1 yum.repos.d]# yum search drbd | grep kmod-drbd83 kmod-drbd83.x86_64 : drbd83 kernel module(s) [root@nfs-node1 yum.repos.d]# yum install -y kmod-drbd83.x86_64 Loaded plugins: fastestmirror, security Setting up Install Process Loading mirror speeds from cached hostfile * elrepo: muug.ca Package kmod-drbd83-8.3.16-3.el6.elrepo.x86_64 already installed and latest version Nothing to do [root@nfs-node1 yum.repos.d]# – Syed Quadri Jun 19 '16 at 18:41
  • anything else you can think of or can point me to the right place and right module where i can install from? Thank you! – Syed Quadri Jun 19 '16 at 18:42
  • I removed the drbd83 and installed drbd84 now but no luck. Still seeing the same error. – Syed Quadri Jun 19 '16 at 19:03
  • Installed: kmod-drbd84.x86_64 0:8.4.7-1_1.el6.elrepo Dependency Installed: drbd84-utils.x86_64 0:8.9.5-1.el6.elrepo Complete! [root@nfs-node1 yum.repos.d]# [root@nfs-node1 yum.repos.d]# rpm -qa | grep drbd kmod-drbd84-8.4.7-1_1.el6.elrepo.x86_64 drbd84-utils-8.9.5-1.el6.elrepo.x86_64 [root@nfs-node1 yum.repos.d]# modprobe drbd FATAL: Module drbd not found. [root@nfs-node1 yum.repos.d]# service drbd start Can not load the drbd module. [root@nfs-node1 yum.repos.d]# kmod-drbd84.x86_64 – Syed Quadri Jun 19 '16 at 19:04
  • Try running `depmod -a`, which will update the module list used by `modprobe`. The package manager should run that, but better to double-check. – Tero Kilkanen Jun 19 '16 at 19:04
  • Thanks for your reply, but no luck. [root@nfs-node1 yum.repos.d]# depmod -a [root@nfs-node1 yum.repos.d]# service drbd start Can not load the drbd module. [root@nfs-node1 yum.repos.d]# modprobe drbd FATAL: Module drbd not found. [root@nfs-node1 yum.repos.d]# service drbd status drbd not loaded [root@nfs-node1 yum.repos.d]# – Syed Quadri Jun 20 '16 at 07:17
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Have you tried to load de module by using modprobe?

modprobe drbd

and adding it to the modules loaded at boot echo drbd > /etc/modules-load.d/drbd.conf

Victor Vidal
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