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bacula_handler.rb
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Sun, May 18, 9:41 PM

bacula_handler.rb
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class BaculaHandler
require 'net/scp'
attr_accessor :host, :tempfile
# Initializes a BaculaHandler instance.
#
# Sets `host` and `template` attributes.
#
# @param host[Host] A the host instance the the bacula handler will act upon
def initialize(host)
@host = host
@tempfile = get_config_file
end
# Deploys the host's config to the bacula director by
#
# * uploading the configuration
# * reloadind the bacula director
#
# Updates the host's status accordingly
#
# @return [Boolean] false if something went wrong
def deploy_config
return false unless send_config
if reload_bacula
host.set_deployed
else
host.dispatch || host.redispatch
end
end
# Removes the host's configuration from the bacula director by
#
# * removing the host's configuration files
# * reloading the bacula director
#
# Updates the host's status accordingly
#
# @return [Boolean] false if something went wrong
def undeploy_config
return false unless remove_config
host.disable if reload_bacula
end
# Schedules an immediate backup to the bacula director for the given host and job
#
# @param job_name[String] the job's name
def backup_now(job_name)
job = host.job_templates.enabled.find_by(name: job_name)
return false unless job
command = "echo \"run job=\\\"#{job.name_for_config}\\\" yes\" | #{bconsole}"
log(command)
exec_with_timeout(command, 2)
end
# Schedules an immediate restore to the bacula director for the given host.
#
# @param location[String] the desired restore location
def restore(location="/tmp/bacula-restore")
command = "echo \"restore client=\\\"#{host.name}\\\" where=\\\"#{location}\\\" select current all done yes\" | #{bconsole}"
log(command)
exec_with_timeout(command, 2)
end
private
def get_config_file
file = Tempfile.new(host.name)
file.chmod(0666)
file.write host.baculize_config.join("\n")
file.close
file
end
def send_config
begin
Net::SCP.upload!(
ssh_settings[:host],
ssh_settings[:username],
tempfile.path,
ssh_settings[:path] + host.name + '.conf',
ssh: { keys: [ssh_settings[:key_file]] }
)
rescue
return false
end
true
end
def remove_config
begin
Net::SSH.start(ssh_settings[:host], ssh_settings[:username],
keys: ssh_settings[:key_file]) do |ssh|
ssh.exec!("rm #{ssh_settings[:path] + host.name}.conf")
end
rescue
return false
end
true
end
def reload_bacula
command = "echo \"reload quit\" | #{bconsole}"
exec_with_timeout(command, 2)
end
def exec_with_timeout(command, sec)
begin
Timeout::timeout(sec) do
`#{command}`
end
rescue
return false
end
true
end
def bconsole
"bconsole -c #{Rails.root}/config/bconsole.conf"
end
def ssh_settings
@ssh_settings ||= YAML::load(File.open("#{Rails.root}/config/ssh.yml"))[Rails.env].
symbolize_keys
end
def log(msg)
Rails.logger.warn("[BaculaHandler]: #{msg}")
end
end

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