MicroCeph is snap-deployed Ceph with built-in clustering.
Deploying and operating a Ceph cluster is complex because Ceph is designed to be a general-purpose storage solution. This is a significant overhead for small Ceph clusters. MicroCeph solves this by being opinionated and focused on the small scale. With MicroCeph, deploying and operating a Ceph cluster is as easy as a Snap!
- Quick and consistent deployment with minimal overhead.
- Single-command operations (for bootstrapping, adding OSDs, service enablement, etc).
- Isolated from the host and upgrade-friendly.
- Built-in clustering so you don't have to worry about it!
- Tailored for small scale (or just your Laptop).
Refer to the QuickStart section for your first setup. If you want to read official documentation, please visit our hosted Docs.
# Install MicroCeph
$ sudo snap install microceph
# Bootstrapping the Ceph Cluster
$ sudo microceph cluster bootstrap
$ sudo microceph.ceph status
cluster:
id: c8d120af-d7dc-45db-a216-4340e88e5a0e
health: HEALTH_WARN
OSD count 0 < osd_pool_default_size 3
services:
mon: 1 daemons, quorum host (age 1m)
mgr: host(active, since 1m)
osd: 0 osds: 0 up, 0 in
data:
pools: 0 pools, 0 pgs
objects: 0 objects, 0 B
usage: 0 B used, 0 B / 0 B avail
pgs: 
NOTE: You might've noticed that the Ceph cluster is not functional yet, We need OSDs!
But before that, if you are only interested in deploying on a single node, it would be worthwhile to change the CRUSH rules. With the below commands, we're re-creating the default rule to have a failure domain of osd (instead of the default host failure domain)
# Change Ceph failure domain to OSD
$ sudo microceph.ceph osd crush rule rm replicated_rule
$ sudo microceph.ceph osd crush rule create-replicated single default osd# Adding OSD Disks
$ sudo microceph disk list
Disks configured in MicroCeph:
+-----+----------+------+
| OSD | LOCATION | PATH |
+-----+----------+------+
Available unpartitioned disks on this system:
+-------+----------+--------+---------------------------------------------+
| MODEL | CAPACITY | TYPE | PATH |
+-------+----------+--------+---------------------------------------------+
| | 10.00GiB | virtio | /dev/disk/by-id/virtio-46c76c00-48fd-4f8d-9 |
+-------+----------+--------+---------------------------------------------+
| | 10.00GiB | virtio | /dev/disk/by-id/virtio-2171ea8f-e8a9-44c7-8 |
+-------+----------+--------+---------------------------------------------+
| | 10.00GiB | virtio | /dev/disk/by-id/virtio-cf9c6e20-306f-4296-b |
+-------+----------+--------+---------------------------------------------+
$ sudo microceph disk add --wipe /dev/disk/by-id/virtio-46c76c00-48fd-4f8d-9
$ sudo microceph disk add --wipe /dev/disk/by-id/virtio-2171ea8f-e8a9-44c7-8
$ sudo microceph disk add --wipe /dev/disk/by-id/virtio-cf9c6e20-306f-4296-b
$ sudo microceph disk list
Disks configured in MicroCeph:
+-----+---------------+---------------------------------------------+
| OSD | LOCATION | PATH |
+-----+---------------+---------------------------------------------+
| 0 | host | /dev/disk/by-id/virtio-46c76c00-48fd-4f8d-9 |
+-----+---------------+---------------------------------------------+
| 1 | host | /dev/disk/by-id/virtio-2171ea8f-e8a9-44c7-8 |
+-----+---------------+---------------------------------------------+
| 2 | host | /dev/disk/by-id/virtio-cf9c6e20-306f-4296-b |
+-----+---------------+---------------------------------------------+
Available unpartitioned disks on this system:
+-------+----------+--------+------------------+
| MODEL | CAPACITY | TYPE | PATH |
+-------+----------+--------+------------------+
# Adding RGW Service
$ sudo microceph enable rgw
# Perform IO and Check cluster status
$ sudo microceph.ceph status
cluster:
id: a8f9b673-f3f3-4e3f-b427-a9cf0d2f2323
health: HEALTH_OK
services:
mon: 1 daemons, quorum host (age 12m)
mgr: host(active, since 12m)
osd: 3 osds: 3 up (since 5m), 3 in (since 5m)
rgw: 1 daemon active (1 hosts, 1 zones)
data:
pools: 7 pools, 193 pgs
objects: 341 objects, 504 MiB
usage: 1.6 GiB used, 28 GiB / 30 GiB avail
pgs: 193 active+clean
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You can also find us on Matrix @Ubuntu Ceph