ceph-ansible/README.md

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ceph-ansible
============
Ansible playbook for Ceph!
Clone me:
```bash
git clone https://github.com/ceph/ceph-ansible.git
```
## 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 using virtualbox provider
* Create vagrant_variables.yml
```
$ cp vagrant_variables.yml.sample vagrant_variables.yml
```
* Create site.yml
```
$ cp site.yml.sample site.yml
```
* Create VMs
```
$ vagrant up --no-provision --provider=virtualbox
$ vagrant provision
...
...
...
____________
< 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:
```bash
$ 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:
```bash
$ 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.
## Specifying package origin
By default, ceph-common installs from Ceph repository. However, you
can set `ceph_origin` to "distro" to install Ceph from your default repository.
## Setup for Vagrant using libvirt provider
* Create vagrant_variables.yml
```
$ cp vagrant_variables.yml.sample vagrant_variables.yml
```
* Edit `vagrant_variables.yml` and setup the following variables:
```yml
memory: 1024
disks: "[ '/dev/vdb', '/dev/vdc' ]"
vagrant_box: centos/7
```
* Create site.yml
```
$ cp site.yml.sample site.yml
```
* Create VMs
```
$ sudo vagrant up --no-provision --provider=libvirt
$ sudo vagrant provision
```
### For Debian based systems
If you want to use "backports", you can set "true" to `ceph_use_distro_backports`.
Attention, ceph-common doesn't manage backports repository, you must add it yourself.
## Vagrant Demo
[![Ceph-ansible Vagrant Demo](http://img.youtube.com/vi/E8-96NamLDo/0.jpg)](https://youtu.be/E8-96NamLDo "Deploy Ceph with Ansible (Vagrant demo)")
## Bare metal demo
Deployment from scratch on bare metal machines:
[![Ceph-ansible bare metal demo](http://img.youtube.com/vi/dv_PEp9qAqg/0.jpg)](https://youtu.be/dv_PEp9qAqg "Deploy Ceph with Ansible (Bare metal demo)")