Fstab

The Kanrisuru::Remote::Fstab class helps manage the fstab file on a remote host. This includes looking up existing entries, validating mounted block devices, and adding new entries to the file.

Namespace

Fstab::Entry

Fstab::Options

Public Class Methods

new

Instantiates a new instance of fstab. Takes a host instance and an optional path to the fstab file on the remote host.

fstab = Kanrisuru::Remote::Fstab.new(host)
fstab.to_s
"UUID=6cd50e51-cfc6-40b9-9ec5-f32fa2e4ff03 / xfs defaults 0 0"

Public Instance Methods

[]

Fetches an entry in the fstab by device name, uuid, or label.

fstab['/dev/vda1']
#<Kanrisuru::Remote::Fstab::Entry:0x920 @line=LABEL=cloudimg-rootfs /  ext4 defaults  0 0 @device=/dev/vda1 @label=cloudimg-rootfs@uuid= @freq=0 @pasno=0@opts=<Kanrisuru::Remote::Fstab::Options:0x940 @opts={"defaults"=>true} @type=ext4>}>

get_entry

Fetches an entry in the fstab by device name, uuid, or label.

fstab.get_entry('/dev/vda1')
#<Kanrisuru::Remote::Fstab::Entry:0x920 @line=LABEL=cloudimg-rootfs /  ext4 defaults  0 0 @device=/dev/vda1 @label=cloudimg-rootfs@uuid= @freq=0 @pasno=0@opts=<Kanrisuru::Remote::Fstab::Options:0x940 @opts={"defaults"=>true} @type=ext4>}>

«

Add a new fstab entry into the fstab. Can take the form of a Kanrisuru::Remote::Fstab::Entry instance or a line formatted as normally in the fstab file.

fstab << Kanrisuru::Remote::Fstab::Entry.new(
  device: '/dev/vda14',
  mount_point: '/mnt/test',
  type: 'ext4',
  opts: { defaults: true },
  freq: '0',
  passno: '0'
)

fstab.to_s
"LABEL=cloudimg-rootfs / ext4 defaults 0 0"
"LABEL=UEFI /boot/efi vfat defaults 0 0"
"/dev/vda14 /mnt/test ext4 defaults 0 0"

append

Add a new fstab entry into the fstab. Can take the form of a Kanrisuru::Remote::Fstab::Entry instance or a line formatted as normally in the fstab file.

fstab.append("/dev/vda14 /mnt/test ext4 defaults 0 0")
fstab['/dev/vda14']
#<Kanrisuru::Remote::Fstab::Entry:0x1040 @line=/dev/vda14 /mnt/test ext4 defaults 0 0 @device=/dev/vda14 @label='' @uuid='' @freq=0 @pasno=0 @opts=<Kanrisuru::Remote::Fstab::Options:0x1060 @opts={"defaults"=>true} @type=ext4>}>

delete

Remove a fstab entry.

fstab.delete('/dev/vda14')

each

Iterate through each fstab entry device.

fstab.each do |entry|
  case entry.type
  when 'ext4'
    ## do something for ext4 device types
  when 'xfs'
    ## do something for xfs device types
  else
    ## do something for other device types 
  end
end

append_file!

Append new entries to fstab. Existing ones in the fstab file won’t be updated.

fstab << '/dev/vda14 /mnt/test ext4 defaults 0 0'
fstab.append_file!

write_file!

Overwrite the entire fstab. This will update any existing lines in the fstab file with the present state of the entries.

to_s

Output the fstab entries as a string

reload!

Fetches all the entries from the fstab file on the remote host.