Create DRBD Partitions on disk (Both Nodes)
The commands below assume that /dev/sdb will be used for the DRBD partition.
device=/dev/sdb
dd if=/dev/zero of=${device} obs=512 count=100
dd if=/dev/zero of=${device} obs=512 count=100 seek=$(( $(blockdev --getsz ${device}) -100 ))
parted ${device} "mklabel gpt"
parted ${device} "mkpart primary 0% 100%"
Verify that the partition is created:
fdisk -l /dev/sdb --> WARNING: fdisk GPT support is currently new, and therefore in an experimental phase. Use at your own discretion. Disk /dev/sdb: 274.9 GB, 274877906944 bytes, 536870912 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk label type: gpt Disk identifier: E7FF3D92-84BB-44E1-B0B0-26150DB80639 # Start End Size Type Name 1 2048 536868863 256G Microsoft basic primary
Install DRBD Repos (Both Nodes)
rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org rpm -Uvh http://www.elrepo.org/elrepo-release-7.0-3.el7.elrepo.noarch.rpm
Install DRBD Modules (Both Nodes)
yum -y install drbd90-utils kmod-drbd90
Configure DRBD (Both Nodes)
NOTE: The following commands requires the hostname of both machines and the IP Address. These are obtained as follows:
ip addr hostname
Create a DRBD config file for jtelshared on /dev/sdb
/etc/drbd.d/jtelshared.res
cat <<EOFF > /etc/drbd.d/jtelshared.res
resource jtelshared {
protocol C;
meta-disk internal;
device /dev/drbd1;
syncer {
verify-alg sha1;
}
net {
allow-two-primaries;
}
on acd-store1 {
disk /dev/sdb1;
address 10.4.8.71:7789;
}
on acd-store2 {
disk /dev/sdb1;
address 10.4.8.171:7789;
}
startup {
become-primary-on both;
}
}
EOFF
Create Metadata (Both Nodes)
drbdadm create-md jtelshared