rbd

README.md

@@ -13,6 +13,7 @@
 * [Manual maintenance](manual_maintenance.md)
 * [FS](FS.md)
     * [FS Quotas](cephfs_quotas.md)
+* [rbd](rbd.md)
 * [MDS Events](mds_logging.md)
 * [FS tests](fs_tests.md)
 * [Prometheus Monitoring](prometheus_monitoring.md)

rbd.md

+# Ceph RBD
+The main configuration is [here](https://docs.ceph.com/en/latest/rbd/index.html).
+To use the block device service you need to create an rbd pool
+```
+ceph osd pool create <pool name> <pg num> <pgp num>
+rbd pool init <pool name>
+```
+Create a key 
+```
+ceph auth get-or-create <some string>.<for the key> mon 'profile rbd' osd 'profile rbd' -o <filename>
+```
+On the client create a conf file in /etc/ceph/
+ceph.conf
+```
+[global]
+mon_host = <ip 1>,<ip 2>,....
+
+[client.kubernetes]
+key = AQA97vVfdQXVEBAAm3f3QR6gq2LZXXXXXXXXXX==
+```
+
+Create an image
+```
+#Remember that the size is in Megabytes
+rbd -n client.<key> create <pool>/<image> -s $((10*1024*1024)) --image-format 2 --image-feature layering
+```
+Verify
+```
+rbd -n client.<key> list <pool>
+```
+Map
+```
+rbd -n client.<key> map <pool>/<image>
+/dev/rbd0
+```
+Create the filesystem
+mkfs.ext4 /dev/rbd0
+
+
+
+
+Some commands [here].(https://docs.ceph.com/en/latest/rbd/rados-rbd-cmds/)
+