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require 'mauve/sender'
require 'mauve/proto'
require 'ipaddr'
require 'socket'
#
# This class encapsulates the raising and clearing of alerts via Mauve.
#
class Alerter
attr_reader :details
BYTEMARK_RANGES = %w(80.68.80.0/20 89.16.160.0/19 212.110.160.0/19 46.43.0.0/18 91.223.58.0/24 213.138.96.0/19 5.153.224.0/21 2001:41c8::/32).collect{|i| IPAddr.new(i)}
def initialize( test_details )
@details = test_details
end
#
# Expand to a message indicating whether a hostname is inside bytemark.
#
def expand_inside_bytemark( host )
target = host
if ( target =~ /https?:\/\/([^\/]+)/ )
target = $1.dup
end
#
# Resolved IP of the target
#
resolved = nil
#
# Resolve the target to an IP
#
begin
Socket.getaddrinfo(target, 'echo').each do |a|
resolved = a[3] if ( a )
end
rescue SocketError
end
return "" unless ( !resolved.nil? )
#
# Test trange
#
if ( BYTEMARK_RANGES.any?{|range| range.include?(IPAddr.new(resolved.to_s))} )
return "<p>#{host} resolves to #{resolved} which is inside the Bytemark network.</p>"
else
return "<p>#{host} resolves to #{resolved} which <b>is not</b> inside the Bytemark network.</p>"
end
end
#
# Raise the alert.
#
def raise( detail )
inside = expand_inside_bytemark( @details["target_host"] )
update = Mauve::Proto::AlertUpdate.new
update.alert = []
update.source = "custodian"
# be explicit about raising/clearing
update.replace = false
alert = Mauve::Proto::Alert.new
# e.g. ping-example.vm.bytemark.co.uk
# e.g. http-http://example.com/page1
alert.id = "#{@details['test_type']}-#{@details['target_host']}"
alert.subject = @details['target_host']
alert.summary = @details['test_alert']
alert.detail = "#{inside} <p>The #{@details['test_type']} test failed against #{@details['target_host']}: #{detail}</p>"
alert.raise_time = Time.now.to_i
update.alert << alert
Mauve::Sender.new("alert.bytemark.co.uk").send(update)
end
#
# Clear the alert.
#
def clear
inside = expand_inside_bytemark( @details["target_host"] )
update = Mauve::Proto::AlertUpdate.new
update.alert = []
update.source = "custodian"
# be explicit about raising/clearing
update.replace = false
alert = Mauve::Proto::Alert.new
# e.g. ping-example.vm.bytemark.co.uk
# e.g. http-http://example.com/page1
alert.id = "#{@details['test_type']}-#{@details['target_host']}"
alert.subject = @details['target_host']
alert.summary = @details['test_alert']
alert.detail = "#{inside} <p>The #{@details['test_type']} test succeeded against #{@details['target_host']}</p>"
alert.clear_time = Time.now.to_i
update.alert << alert
Mauve::Sender.new("alert.bytemark.co.uk").send(update)
end
end
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