Create DRBD Partitions on disk
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
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
yum -y install drbd90-utils kmod-drbd90 modprobe drbd
Check if DRBD module is loaded
lsmod | grep -i drbd --> drbd 524709 0 libcrc32c 12644 4 xfs,drbd,nf_nat,nf_conntrack
Configure DRBD
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