Adding OSDs

In this section, NVMe SSDs are divided into twelve 60 GB partitions and twelve 180 GB partitions, which correspond to the WAL and DB partitions respectively.

1. Create a partition.sh script. (Skip this step if partitioning is not required.)

   1	vi partition.sh

2. Add the following content to the script (assume that a single NVMe SDD is divided into 12 partitions). Skip this step if partitioning is not required.

   #!/bin/bash
   
   parted /dev/nvme0n1 mklabel gpt
   
   for j in `seq 1 12`
   do
   ((b = $(( $j * 8 ))))
   ((a = $(( $b - 8 ))))
   ((c = $(( $b - 6 ))))
   str="%"
   echo $a
   echo $b
   echo $c
   parted /dev/nvme0n1 mkpart primary ${a}${str} ${c}${str}
   parted /dev/nvme0n1 mkpart primary ${c}${str} ${b}${str}
   done

3. Run the script. (Skip this step if partitioning is not required.)

   bash partition.sh

4. Create a create_osd.sh script on ceph1 and deploy OSDs on the 12 drive partitions on each server.

   vi /etc/ceph/create_osd.sh

5. Add the following content to the script:

   #!/bin/bash
   
   for node in ceph1 ceph2 ceph3
   do
   for i in {0..7}
   do
   ceph-deploy osd create ${node} --data /dev/nvme${i}n1
   done
   done

6. Run the script on ceph1.

   bash create_osd.sh

7. Check whether the OSDs are created.

   ceph -s