mount-data-disks
Automatically format and mount data disks on virtual machine instances.
This role is made of a script mount-data-disks
that:
- Looks for data disks (disks larger than a given size that are not already mounted and that do not exist in /etc/fstab)
- Format the eligible disks with a single ext4 partition if necessary
- Mount the disks on /data-0, data-1, ... mountpoints
- Create subdirectories and set permissions on the mountpoints
Usage
The script mount-data-disks
is automatically launched at startup (via systemd).
Indeed, the mount is temporary: nothing is ever written in /etc/fstab.
You may run the commands mount-data-disks
and umount-data-disks
to
respectively mount and un-mount the data disks manually.
Requirements
The scripts run with bash. They have been tested on Ubuntu 16.04+ only so far.
The only true requirement is a systemd compatible system to call the
command mount-data-disks
at boot time.
Naming
The mountpoints (/data-X) begin at 0 and rise incrementally,
in the order of the eligible device blocks.
Here is an example output of df -h
on a machine configured with this role:
Filesystem Size Used Avail Use% Mounted on
/dev/sda1 29G 19G 9.9G 66% /
/dev/sdb1 55G 577M 52G 2% /mnt
/dev/sdc1 1007G 351G 606G 37% /data-0
/dev/sde1 10G 1G 9G 10% /boot
/dev/sdf1 504G 226G 253G 48% /data-1
/dev/sdg1 504G 187G 292G 39% /data-2
Variables
# File keeping track of mounted disks
mdd_file: /var/run/data-mountpoints
# Subdirectories to create on every mounted disk
mdd_subdirectories: []
# Owner and group of the mounted disks
mdd_final_user: root
mdd_final_group: root
# Minimum disk size in bytes (default: 100GB)
mdd_min_disk_size: 100122547200
License
MIT