DRBD

Ruby wrapper for DRBD

It is usefull for

Best with drbd version > 8.3.7
Hostname used for connection must be one of hostnames in drbd.conf (FQDN ideally)
It’sJust one-morning’s prototype, take patience
No tests
No documentation
Absolutely no warranty, use it at your own risk

gem install drbd

simply fetch data from remote host

d = Drbd.new("fqdn.domain.tld")

you can specify command to be executed

d = Drbd.new("fqdn.domain.tld", :command => 'sudo /sbin/drbdadm')
obtain array of configured configured resources

r = d.resources.first
get resource name

r.name
get resource protocol

r.protocol
get hosts for resource

r.hosts
get status for resource

r.status
get node addresses

r.hosts.map{|h| h.address }
get status

resource status is hash with keys:

:cs, :resynced_percent, :minor, :ro1, :ds1, :ro2, :ds2, :name

r.status
find resource by name

r = d.find_resource_by_name("r0")
find resource by backing disk

r = d.find_resource_by_disk("/dev/volgroup-logvolume--name")
true if both of devices are UpToDate

r.consinstent?
true if resynced_percent is present in status

r.resync_running?
true if resource status is “Connected”

r.up?
true if resource status is “Unconfigured”

r.down?
stateless perform drbdadm up on resource (use at your own risk!)

r.up!
stateless perform drbdadm down on resource (use at your own risk!)

r.down!
stateless perform forced drbdadm create-md on resource (use at your own risk!)

if resource is not down, returns false and does nothing

r.init_metadata
back-reference to the DRBD object

r.drbd
uptate status of all resources

r.drbd.load_status!

d.load_status!