Takuya::Lvm::Snapshot

Wrapper for lvm, to use lvm snapshot.

example

This package make easy to Take Snapshot and Backup.

require "takuya/lvm_snapshot"
LvmSnapShot = Takuya::LvmSnapShot

LvmSnapShot.new('vg0').enter_snapshot('lv0'){
    ## backup from snapshot 
    FileUtils.cp_r('/mnt/var/lib/mysql', '/nfs/backup/mysql')
}

Using proc call, We can focus on backup steps.

Installation

Add this line to your application's Gemfile:

gem 'takuya-lvm-snapshot'

And then execute:

bundle config set --local path '.bundle'
bundle install

Or install it yourself as:

gem install takuya-lvm-snapshot

Installation from github

Add Following line into Gemfile.

gem 'takuya-lvm-snapshot', git: 'https://github.com/takuya/ruby-lvm-snapshot-wrapper.git'

Usage

create / list / delete lvm snapshot

require "takuya/lvm_snapshot"
LvmSnapShot = Takuya::LvmSnapShot

lvsnap = LvmSnapShot.new('vg_name')
lvsnap.create('snap_01')
lvsnap.exists('snap_01')
lvsnap.mount('snap_01','/mnt')
lvsnap.unmount('snap_01','/mnt')
lvsnap.remove('snap_01')

This package make easy to Take Snapshot and backup.

require "takuya/lvm_snapshot"
LvmSnapShot = Takuya::LvmSnapShot

LvmSnapShot.new('vg0').enter_snapshot{|mnt|
    ## make working snapshot.
    ## backup from snapshot.
    ## no stopping sevices.
    FileUtils.cp_r('/mnt/var/lib/mysql', '/nfs/backup/mysql')
}

Example.

Make use of LVM Snap Shot allows us to Backup without stopping services.

require "takuya/lvm_snapshot"
LvmSnapShot = Takuya::LvmSnapShot

LvmSnapShot.new('vg0','lv0','20G','/mnt').enter_snapshot{|mnt|
    ## backup from snapshot 
    src="#{mnt}/var/lib/libvirt/images/my-vm.qcow2"
    cmd="rsync -a '#{src}' myserver:~/my-backup "
    `#{cmd}`
}

Testing

bundle exec rspec spec 

Releasing

bundle exec rake release

Development

After checking out the repo, run bin/setup to install dependencies. Then, run rake to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and the created tag, and push the .gem file to rubygems.org.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/takuya/ruby-lvm-snapshot-wrapper/.