Instructions for installing and configuring DRBD on CentOS 7 - Insurance Finances

OS: CentOS 7 64 bit

Device: /dev/sda - 10GB

        /dev/sdb - 10GB

Hostname: node1

IP: 192.168.1.11

Gateway: 192.168.1.1

Prefix: 24

OS: CentOS 7 64 bit

Device: /dev/sda - 10GB

        /dev/sdb - 10GB

Hostname: node2

IP: 192.168.1.12

Gateway: 192.168.1.1

Prefix: 24

2. Steps to take

2.1 Installing DRBD

• Before installing, we have to configure the hostname for each node and write them in hosts

[root@node1 ~] hostnamectl set-hostname node1

[root@node2 ~] hostnamectl set-hostname node2

• Add in hosts of each server

vi /etc/hosts

192.168.1.11 node1

• Next, we install DRBD on both servers. First, we add the DRBD repos and key

rpm -ivh http://www.elrepo.org/elrepo-release-7.0-2.el7.elrepo.noarch.rpm

rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-elrepo.org

• Before installing, we check the latest version of DRBD.

yum info *drbd* | grep Name



Name        : drbd90-utils

Name        : drbd90-utils-sysvinit

Name        : kmod-drbd90

After running the above command, we see the current version is drbd90

• We continue to install DRBD on both servers.

yum -y install drbd90-utils kmod-drbd90

Attention: If the above key is corrupted, please do the following to import the keys available in /etc/pki/rpm-gpg/ and redo the installation step above.

rpm --import /etc/pki/rpm-gpg/*

• Enable the DRBD module on both servers

• Double check that DRBD is working:

lsmod | grep drbd



drbd                  405309  0

libcrc32c              12644  2 xfs,drbd

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