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README.md
ceph-ansible
Ansible playbook for Ceph!
What does it do?
General support for:
- Monitors
- OSDs
- MDSs
- RGW
More details:
- Authentication (cephx), this can be disabled.
- Supports cluster public and private network.
- Monitors deployment. You can easily start with one monitor and then progressively add new nodes. So can deploy one monitor for testing purpose. For production, I recommend to always use an odd number of monitors, 3 tends to be the standard.
- Object Storage Daemons. Like the monitors you can start with a certain amount of nodes and then grow this number. The playbook either supports a dedicated device for storing the journal or both journal and OSD data on the same device (using a tiny partition at the beginning of the device).
- Metadata daemons.
- Collocation. The playbook supports collocating Monitors, OSDs and MDSs on the same machine.
- The playbook was validated on Debian Wheezy, Ubuntu 12.04 LTS and CentOS 6.4.
- Tested on Ceph Dumpling and Emperor.
- A rolling upgrade playbook was written, an upgrade from Dumpling to Emperor was performed and worked.
Setup with Vagrant
Run your virtual machines:
$ vagrant up
...
...
...
____________
< PLAY RECAP >
------------
\ ^__^
\ (oo)\_______
(__)\ )\/\
||----w |
|| ||
mon0 : ok=16 changed=11 unreachable=0 failed=0
mon1 : ok=16 changed=10 unreachable=0 failed=0
mon2 : ok=16 changed=11 unreachable=0 failed=0
osd0 : ok=19 changed=7 unreachable=0 failed=0
osd1 : ok=19 changed=7 unreachable=0 failed=0
osd2 : ok=19 changed=7 unreachable=0 failed=0
rgw : ok=20 changed=17 unreachable=0 failed=0
Check the status:
$ vagrant ssh mon0 -c "sudo ceph -s"
cluster 4a158d27-f750-41d5-9e7f-26ce4c9d2d45
health HEALTH_OK
monmap e3: 3 mons at {ceph-mon0=192.168.0.10:6789/0,ceph-mon1=192.168.0.11:6789/0,ceph-mon2=192.168.0.12:6789/0}, election epoch 6, quorum 0,1,2 ceph-mon0,ceph-mon1,ceph-mon
mdsmap e6: 1/1/1 up {0=ceph-osd0=up:active}, 2 up:standby
osdmap e10: 6 osds: 6 up, 6 in
pgmap v17: 192 pgs, 3 pools, 9470 bytes data, 21 objects
205 MB used, 29728 MB / 29933 MB avail
192 active+clean
To re-run the Ansible provisioning scripts:
$ vagrant provision
Specifying fsid and secret key in production
The Vagrantfile specifies an fsid for the cluster and a secret key for the
monitor. If using these playbooks in production, you must generate your own fsid
in group_vars/all and monitor_secret in group_vars/mons. Those files contain
information about how to generate appropriate values for these variables.