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myos/ansible/roles/disks/README.md

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Disk

This role allows you to format extra disks and attach them to different mount points.

You can use it to move the data of different services to another disk.

Configuration

Inventory

Because the configuration for additional disks must be stored using the YAML syntax, you have to write it in a group_vars directory.

# inventory/group_vars/GROUP_NAME
disks_additional_disks:
 - disk: /dev/sdb
   fstype: ext4
   mount_options: defaults
   mount: /data
   user: www-data
   group: www-data
   disable_periodic_fsck: false
 - disk: /dev/nvme0n1
   part: /dev/nvme0n1p1
   fstype: xfs
   mount_options: defaults,noatime
   mount: /data2
 - device_name: /dev/sdf
   fstype: ext4
   mount_options: defaults
   mount: /data
 - disk: nfs-host:/nfs/export
   fstype: nfs
   mount_options: defaults,noatime
   mount: /mnt/nfs
  • disk is the device, you want to mount.
  • part is the first partition name. If not specified, 1 will be appended to the disk name.
  • fstype allows you to choose the filesystem to use with the new disk.
  • mount_options allows you to specify custom mount options.
  • mount is the directory where the new disk should be mounted.
  • user sets owner of the mount directory (default: root).
  • group sets group of the mount directory (default: root).
  • disable_periodic_fsck deactivates the periodic ext3/4 filesystem check for the new disk.

You can add:

  • disks_package_use is the required package manager module to use (yum, apt, etc). The default 'auto' will use existing facts or try to autodetect it.

The following filesystems are currently supported:

*) Note: To use these filesystems you have to define and install additional software packages. Please estimate the right package names for your operating system.

# inventory/group_vars/GROUP_NAME
disks_additional_packages:
  - xfsprogs     # package for mkfs.xfs on RedHat / Ubuntu
  - btrfs-progs  # package for mkfs.btrfs on CentOS / Debian
disks_additional_services:
  - rpc.statd    # start rpc.statd service for nfs

How it works

It uses sfdisk to partition the disk with a single primary partition spanning the entire disk. The specified filesystem will then be created with mkfs. Finally the new partition will be mounted to the specified mount path.