Class: Snapsync::Sync

Inherits:
Object
  • Object
show all
Defined in:
lib/snapsync/sync.rb

Overview

Single-target synchronization

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(config, target, autoclean: nil) ⇒ Sync

Returns a new instance of Sync.



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# File 'lib/snapsync/sync.rb', line 9

def initialize(config, target, autoclean: nil)
    @config = config
    @target = target
    @autoclean =
        if autoclean.nil? then target.autoclean?
        else autoclean
        end
end

Instance Attribute Details

#config ⇒ Object (readonly)

Returns the value of attribute config.



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# File 'lib/snapsync/sync.rb', line 4

def config
  @config
end

#target ⇒ SyncTarget (readonly)

Returns:



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# File 'lib/snapsync/sync.rb', line 7

def target
  @target
end

Instance Method Details

#autoclean? ⇒ Boolean

Whether the target should be cleaned after synchronization.

This is determined either by #autoclean? if new was called with true or false, or by the target’s own autoclean flag if new was called with nil

Returns:

  • (Boolean) 


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# File 'lib/snapsync/sync.rb', line 23

def autoclean?
    @autoclean
end

#remove_partially_synchronized_snapshots ⇒ Object 



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# File 'lib/snapsync/sync.rb', line 35

def remove_partially_synchronized_snapshots
    btrfs_target = Btrfs.get(@target.dir)

    target.each_snapshot_raw do |path, snapshot, error|
        next if !error && !snapshot.partial?

        Snapsync.info "Removing partial snapshot at #{path}"
        begin
            if (path + "snapshot").exist?
                btrfs_target.run("subvolume", "delete", (path + "snapshot").path_part)
            elsif (path + "snapshot.partial").exist?
                btrfs_target.run("subvolume", "delete", (path + "snapshot.partial").path_part)
            end
        rescue Btrfs::Error => e
            Snapsync.warn "failed to remove snapshot at #{path}, keeping the rest of the snapshot"
            Snapsync.warn e.message
            next
        end

        path.rmtree
        Snapsync.info "Flushing data to disk"
        begin
            btrfs_target.run("subvolume", "sync", path.path_part)
        rescue Btrfs::Error
            # Ignored
        end
    end
end

#run ⇒ Object 



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# File 'lib/snapsync/sync.rb', line 64

def run
    if autoclean?
        remove_partially_synchronized_snapshots
    end

    sync

    if autoclean?
        if target.cleanup
            Snapsync.info "running cleanup for #{target.dir}"
            target.cleanup.cleanup(target)
        else
            Snapsync.info "#{target.sync_policy.class.name} policy set, no cleanup to do for #{target.dir}"
        end
    else
        Snapsync.info "autoclean not set on #{target.dir}"
    end
end

#sync ⇒ Object

The method that performs synchronization

One usually wants to call #run, which also takes care of running cleanup if #autoclean? is true



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# File 'lib/snapsync/sync.rb', line 31

def sync
    SnapshotTransfer.new(config, target).sync
end