Setup and initialise a RAID10 array of EC2 EBS volumes using an Ansible playbook

raid.yml

- action: ec2_facts

- apt: pkg=lvm2 state=present
- apt: pkg=mdadm state=present

- pip: name=boto state=latest

- ec2_vol: instance="{{ hostvars[inventory_hostname]['ansible_ec2_instance-id'] }}"
           volume_size=20
           device_name="{{ item }}"
           region="{{ ansible_ec2_placement_region }}"
           zone="{{ ansible_ec2_placement_availability_zone }}"
           aws_access_key="{{aws_access_key_id}}"
           aws_secret_key="{{aws_secret_access_key}}"
  with_items:
    - /dev/sdf
    - /dev/sdg
    - /dev/sdh
    - /dev/sdi
    - /dev/sdj
    - /dev/sdk
    - /dev/sdl
    - /dev/sdm

- name: check for /dev/md0
  shell: "mdadm -D /dev/md0"
  ignore_errors: yes
  register: mdadm_check

- name: initialise /dev/md0
  shell: "mdadm -v --create /dev/md0 --level=raid10 --raid-devices=8 /dev/xvdf /dev/xvdg /dev/xvdh /dev/xvdi /dev/xvdj /dev/xvdk /dev/xvdl /dev/xvdm"
  when: mdadm_check.rc != 0

- name: wait for /dev/md0 to come online
  shell: "mdadm --wait /dev/md0"
  when: mdadm_check.rc != 0

- name: volume group
  lvg: vg=vg0 pvs=/dev/md0

- lvol: vg=vg0 lv=data size=90%VG
- lvol: vg=vg0 lv=log size=5%VG
- lvol: vg=vg0 lv=journal size=5%VG

- filesystem: fstype=ext4 dev=/dev/vg0/data
- filesystem: fstype=ext4 dev=/dev/vg0/log
- filesystem: fstype=ext4 dev=/dev/vg0/journal

- file: path=/data state=directory owner=mongodb group=mongodb mode=0755
- file: path=/log state=directory owner=mongodb group=mongodb mode=0755
- file: path=/journal state=directory owner=mongodb group=mongodb mode=0755

- mount: name=/data src=/dev/vg0/data fstype=ext4 opts=defaults,auto,noatime,nodiratime,noexec,relatime state=mounted
- mount: name=/log src=/dev/vg0/log fstype=ext4 opts=defaults,auto,noatime,nodiratime,noexec,relatime state=mounted
- mount: name=/journal src=/dev/vg0/journal fstype=ext4 opts=defaults,auto,noatime,nodiratime,noexec,relatime state=mounted