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Add Ceph Playbook 

Initial commit.

Signed-off-by: Sébastien Han <sebastien.han@enovance.com>
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Sébastien Han 2014-03-03 19:08:51 +01:00
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ceph-ansible
============
Ansible playbooks for Ceph
Ansible playbook for Ceph!
## What does it do?
* 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 a
* 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 th
* Metadata daemons.
* Collocation. The playbook supports collocating Monitors, OSDs and MDSs on the same machine.
* The playbook was validated on both Debian Wheezy and Ubuntu 12.04 LTS.
* 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
First modify the `rc` file we your home directory:
export ANSIBLE_CONFIG=<whatever_path>/.ansible.cfg
Do the same for the `.ansible.cfg` file:
[defaults]
host_key_checking = False
remote_user = vagrant
hostfile = <whatever_path>/hosts
log_path = <whatever_path>/ansible.log
ansible_managed = Ansible managed: modified on %Y-%m-%d %H:%M:%S by {uid}
private_key_file = ~/.vagrant.d/insecure_private_key
error_on_undefined_vars = False
Edit your `/etc/hosts` file with:
# Ansible hosts
127.0.0.1 ceph-mon0
127.0.0.1 ceph-mon1
127.0.0.1 ceph-mon2
127.0.0.1 ceph-osd0
127.0.0.1 ceph-osd1
127.0.0.1 ceph-osd2
**Now since we use Vagrant and port forwarding, don't forget to grab the SSH local port of your VMs.**
Then edit your `hosts` file accordingly.
Ok let's get serious now.
Run your virtual machines:
```bash
$ vagrant up
...
...
...
```
Test if Ansible can access the virtual machines:
```bash
$ ansible all -m ping
ceph-mon0 | success >> {
"changed": false,
"ping": "pong"
}
ceph-mon1 | success >> {
"changed": false,
"ping": "pong"
}
ceph-osd0 | success >> {
"changed": false,
"ping": "pong"
}
ceph-osd2 | success >> {
"changed": false,
"ping": "pong"
}
ceph-mon2 | success >> {
"changed": false,
"ping": "pong"
}
ceph-osd1 | success >> {
"changed": false,
"ping": "pong"
}
```
Ready to deploy? Let's go!
```bash
$ ansible-playbook -f 6 -v site.yml
...
...
____________
< PLAY RECAP >
------------
\ ^__^
\ (oo)\_______
(__)\ )\/\
||----w |
|| ||
ceph-mon0 : ok=13 changed=10 unreachable=0 failed=0
ceph-mon1 : ok=13 changed=9 unreachable=0 failed=0
ceph-mon2 : ok=13 changed=9 unreachable=0 failed=0
ceph-osd0 : ok=19 changed=12 unreachable=0 failed=0
ceph-osd1 : ok=19 changed=12 unreachable=0 failed=0
ceph-osd2 : ok=19 changed=12 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

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# -*- mode: ruby -*-
# vi: set ft=ruby :
# Vagrantfile API/syntax version. Don't touch unless you know what you're doing!
VAGRANTFILE_API_VERSION = "2"
Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|
config.vm.box = "precise64"
config.vm.box_url = "http://files.vagrantup.com/precise64.box"
(0..2).each do |i|
config.vm.define "mon#{i}" do |mon|
mon.vm.hostname = "ceph-mon#{i}"
mon.vm.network :private_network, ip: "192.168.0.1#{i}"
end
end
(0..2).each do |i|
config.vm.define "osd#{i}" do |osd|
osd.vm.hostname = "ceph-osd#{i}"
osd.vm.network :private_network, ip: "192.168.0.10#{i}"
osd.vm.network :private_network, ip: "192.168.0.20#{i}"
(0..2).each do |d|
osd.vm.provider :virtualbox do |vb|
vb.customize [ "createhd", "--filename", "disk-#{i}-#{d}", "--size", "5000" ]
vb.customize [ "storageattach", :id, "--storagectl", "SATA Controller", "--port", 3+d, "--device", 0, "--type", "hdd", "--medium", "disk-#{i}-#{d}.vdi" ]
end
end
end
end
end

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---
# Variables here are applicable to all host groups NOT roles
# Setup options
distro_release: "{{ facter_lsbdistcodename }}"
apt_key: https://ceph.com/git/?p=ceph.git;a=blob_plain;f=keys/release.asc
ceph_release: emperor
# Ceph options
cephx: true
fsid: 4a158d27-f750-41d5-9e7f-26ce4c9d2d45
# OSD options
journal_size: 100
pool_default_pg_num: 128
pool_default_pgp_num: 128
pool_default_size: 2
cluster_network: 192.168.0.0/24
public_network: 192.168.0.0/24
osd_mkfs_type: xfs

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---
# Variables here are applicable to all host groups NOT roles
# Monitor options
monitor_secret: AQD7kyJQQGoOBhAAqrPAqSopSwPrrfMMomzVdw==

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---
# Variables here are applicable to all host groups NOT roles
#
# Devices to be used as OSDs
devices:
- /dev/sdc
- /dev/sdd
# Use 'None' to undefined the variable.
# Using 'None' will colocate both journal and data on the same disk
# creating a partition at the beginning of the device
#
journal_device: /dev/sdb

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#
## If you use Vagrant and port forwarding, don't forget to grab the SSH local port of your VMs.
#
## Common setup example
#
[mons]
ceph-mon0:2222
ceph-mon1:2200
ceph-mon2:2201
[osds]
ceph-osd0:2202
ceph-osd1:2203
ceph-osd2:2204
[mdss]
ceph-osd0:2202
ceph-osd1:2203
ceph-osd2:2204
# Colocation setup example
#[mons]
#ceph-osd0:2222
#ceph-osd1:2200
#ceph-osd2:2201
#[osds]
#ceph-osd0:2222
#ceph-osd1:2200
#ceph-osd2:2201
#[mdss]
#ceph-osd0:2222
#ceph-osd1:2200
#ceph-osd2:2201

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export ANSIBLE_CONFIG=~/.ansible.cfg

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---
- name: "update apt cache"
action: apt update-cache=yes

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---
## Common to all the ceph nodes
#
- name: Install dependancies
apt: pkg={{ item }} state=installed update_cache=yes # we update the cache just in case...
with_items:
- python-pycurl
- ntp
- name: Install the ceph key
apt_key: url={{ apt_key }} state=present
- name: Add ceph repository
apt_repository: repo='deb http://ceph.com/debian-{{ ceph_release }}/ {{ ansible_lsb.codename }} main' state=present
- name: Install ceph
apt: pkg={{ item }} state=latest
with_items:
- ceph
- ceph-common #|
- ceph-fs-common #|--> yes, they are already all dependancies from 'ceph'
- ceph-fuse #|--> however while proceding to rolling upgrades and the 'ceph' package upgrade
- ceph-mds #|--> they don't get update so we need to force them
- libcephfs1 #|
- name: Generate ceph configuration file
template: src=roles/common/templates/ceph.conf.j2 dest=/etc/ceph/ceph.conf owner=root group=root mode=0644

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# {{ ansible_managed }}
[global]
{% if cephx %}
auth cluster required = cephx
auth service required = cephx
auth client required = cephx
{% else %}
auth cluster required = none
auth service required = none
auth client required = none
auth supported = none
{% endif %}
fsid = {{ fsid }}
mon_initial_members = {{ hostvars[groups['mons'][0]]['ansible_hostname'] }}
{% if pool_default_pg_num is defined %}
osd pool default pg num = {{ pool_default_pg_num }}
{% endif %}
{% if pool_default_pgp_num is defined %}
osd pool default pgp num = {{ pool_default_pgp_num }}
{% endif %}
{% if pool_default_size is defined %}
osd pool default size = {{ pool_default_size }}
{% endif %}
{% if pool_default_min_size is defined %}
osd pool default min size = {{ pool_default_min_size }}
{% endif %}
{% if pool_default_crush_rule is defined %}
osd pool default crush rule = {{ pool_default_crush_rule }}
{% endif %}
[mon]
{% for host in groups['mons'] %}
[mon.{{ hostvars[host]['ansible_hostname'] }}]
host = {{ hostvars[host]['ansible_hostname'] }}
mon addr = {{ hostvars[host]['ansible_eth1']['ipv4']['address'] }}
{% endfor %}
[osd]
{% if osd_mkfs_type is defined %}
osd mkfs type = {{ osd_mkfs_type }}
{% endif %}
{% if osd_mkfs_type == "ext4" %}
filestore xattr use omap = true
{% endif %}
osd journal size = {{ journal_size }}
{% if cluster_network is defined %}
cluster_network = {{ cluster_network }}
{% endif %}
{% if public_network is defined %}
public_network = {{ public_network }}
{% endif %}
[mds]
{% for host in groups['mdss'] %}
[mds.{{ hostvars[host]['ansible_hostname'] }}]
host = {{ hostvars[host]['ansible_hostname'] }}
{% endfor %}

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---
## Deploy Ceph metadata server(s)
#
- name: Copy MDS bootstrap key
copy: src=fetch/{{ hostvars[groups['mons'][0]]['ansible_hostname'] }}/var/lib/ceph/bootstrap-mds/ceph.keyring dest=/var/lib/ceph/bootstrap-mds/ceph.keyring owner=root group=root mode=600
when: cephx
- name: Set MDS bootstrap key permissions
file: path=/var/lib/ceph/bootstrap-mds/ceph.keyring mode=0600 owner=root group=root
when: cephx
- name: Create MDS directory
action: file path=/var/lib/ceph/mds/ceph-{{ ansible_hostname }} state=directory owner=root group=root mode=0644
when: cephx
- name: Create MDS keyring
command: ceph --cluster ceph --name client.bootstrap-mds --keyring /var/lib/ceph/bootstrap-mds/ceph.keyring auth get-or-create mds.{{ ansible_hostname }} osd 'allow rwx' mds 'allow' mon 'allow profile mds' -o /var/lib/ceph/mds/ceph-{{ ansible_hostname }}/keyring creates=/var/lib/ceph/mds/ceph-{{ ansible_hostname }}/keyring
when: cephx
changed_when: False
- name: Set MDS key permissions
file: path=/var/lib/ceph/mds/ceph-{{ ansible_hostname }}/keyring mode=0600 owner=root group=root
when: cephx
- name: Start and add that the MDS service to the init sequence
service: name=ceph state=started enabled=yes args=mds

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---
## Deploy Ceph monitor(s)
#
- name: Create monitor initial keyring
command: ceph-authtool /var/lib/ceph/tmp/keyring.mon.{{ ansible_hostname }} --create-keyring --name=mon. --add-key={{ monitor_secret }} --cap mon 'allow *' creates=/var/lib/ceph/tmp/keyring.mon.{{ ansible_hostname }}
- name: Set initial monitor key permissions
file: path=/var/lib/ceph/tmp/keyring.mon.{{ ansible_hostname }} mode=0600 owner=root group=root
- name: Create monitor directory
action: file path=/var/lib/ceph/mon/ceph-{{ ansible_hostname }} state=directory owner=root group=root mode=0644
- name: Ceph monitor mkfs
command: ceph-mon --mkfs -i {{ ansible_hostname }} --keyring /var/lib/ceph/tmp/keyring.mon.{{ ansible_hostname }} creates=/var/lib/ceph/mon/ceph-{{ ansible_hostname }}/keyring
- name: Start and add that the monitor service to the init sequence
service: name=ceph state=started enabled=yes args=mon
# Wait for mon discovery and quorum resolution
# the admin key is not instantanely created so we have to wait a bit
#
- name: If client.admin key exists
command: stat /etc/ceph/ceph.client.admin.keyring
register: result
until: result.rc == 0
changed_when: False
- name: Copy keys to the ansible server
fetch: src={{ item }} dest=fetch/
when: ansible_hostname == hostvars[groups['mons'][0]]['ansible_hostname'] and cephx
with_items:
- /etc/ceph/ceph.client.admin.keyring # just in case another application needs it
- /var/lib/ceph/bootstrap-osd/ceph.keyring # this handles the non-colocation case
- /var/lib/ceph/bootstrap-mds/ceph.keyring

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---
## Deploy Ceph Oject Storage Daemon(s)
#
- name: Install dependancies
apt: pkg=parted state=present
- name: Copy OSD bootstrap key
copy: src=fetch/{{ hostvars[groups['mons'][0]]['ansible_hostname'] }}/var/lib/ceph/bootstrap-osd/ceph.keyring dest=/var/lib/ceph/bootstrap-osd/ceph.keyring owner=root group=root mode=600
when: cephx
- name: Set OSD bootstrap key permissions
file: path=/var/lib/ceph/bootstrap-osd/ceph.keyring mode=0600 owner=root group=root
when: cephx
# NOTE (leseb): current behavior of ceph-disk is to fail when the device is mounted "stderr: ceph-disk: Error: Device is mounted: /dev/sdb1"
# the return code is 1, which makes sense, however ideally if ceph-disk will detect a ceph partition
# it should exist we rc=0 and don't do anything unless we do something like --force
# As as a final word, I prefer to keep the partition check instead of running ceph-disk prepare with "ignore_errors: True"
# I believe it's safer
#
- name: If partition named 'ceph' exists
shell: parted {{ item }} print | egrep -sq '^ 1.*ceph'
ignore_errors: True
with_items: devices
register: parted
changed_when: False
# Prepare means
# - create GPT partition
# - mark the partition with the ceph type uuid
# - create a file system
# - mark the fs as ready for ceph consumption
# - entire data disk is used (one big partition)
# - a new partition is added to the journal disk (so it can be easily shared)
#
# NOTE (leseb): the prepare process must be parallelized somehow...
# if you have 64 disks with 4TB each, this will take a while
# since Ansible will sequential process the loop
- name: Prepare OSD disk(s)
command: ceph-disk prepare {{ item.1 }} {{ journal_device }}
when: item.0.rc != 0
with_together:
- parted.results
- devices
# Activate means:
# - mount the volume in a temp location
# - allocate an osd id (if needed)
# - remount in the correct location /var/lib/ceph/osd/$cluster-$id
# - start ceph-osd
#
- name: Activate OSD(s)
command: ceph-disk activate {{ item }}1
with_items: devices
changed_when: False
- name: Start and add that the OSD service to the init sequence
service: name=ceph state=started enabled=yes

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---
# This playbook does a rolling update for all the Ceph services
# Change the value of serial: to adjust the number of server to be updated.
#
# The four roles that apply to the ceph hosts will be applied: common,
# mon, osd and mds. So any changes to configuration, package updates, etc,
# will be applied as part of the rolling update process.
#
# /!\ DO NOT FORGET TO CHANGE THE RELEASE VERSION FIRST! /!\
- hosts: all
sudo: True
roles:
- common
- hosts: mons
serial: 1
sudo: True
roles:
- mon
post_tasks:
- name: restart monitor(s)
service: name=ceph state=restarted args=mon
- hosts: osds
serial: 1
sudo: True
roles:
- osd
post_tasks:
- name: restart object storage daemon(s)
command: service ceph-osd-all restart
when: ansible_distribution == "Ubuntu"
- name: restart object storage daemon(s)
service: name=ceph state=restarted args=osd
when: ansible_distribution == "Debian"
- hosts: mdss
serial: 1
sudo: True
roles:
- mds
post_tasks:
- name: restart metadata server(s)
service: name=ceph state=restarted args=mds

18
site.yml 100644
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@ -0,0 +1,18 @@
---
# Defines deployment design and assigns role to server groups
- hosts: all
sudo: True
roles:
- common
- hosts: mons
sudo: True
roles:
- mon
- hosts: osds
sudo: True
roles:
- osd
- mds