Class: Upstreamstatus

Inherits:
Object
  • Object
show all
Extended by:
Forwardable
Defined in:
lib/upstreamstatus.rb,
lib/upstreamstatus/version.rb

Constant Summary collapse

VERSION = 
"0.4.1"

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Upstreamstatus 



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# File 'lib/upstreamstatus.rb', line 28

def initialize
  @conf = OpenStruct.new load_conf

  return unless opts[:notify]

  %w(
    sentry_dsn
    pagerduty_api_key
    pagerduty_rest_api_key
    pagerduty_api_url
    pagerduty_service_id
  ).each do |key|
    fail "Config missing #{key}" unless conf[key]
  end

  Unirest.default_header 'Authorization',
                         "Token token=#{pagerduty_rest_api_key}"
  Unirest.default_header 'Content-type', 'application/json'
  Unirest.default_header 'Accept', 'application/vnd.pagerduty+json;version=2'

  Raven.configure do |config|
    config.dsn = sentry_dsn
    config.logger = logger
  end
end

Instance Attribute Details

#conf ⇒ Object (readonly)

Returns the value of attribute conf.



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# File 'lib/upstreamstatus.rb', line 26

def conf
  @conf
end

Instance Method Details

#current_status ⇒ Object 



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# File 'lib/upstreamstatus.rb', line 91

def current_status
  @current_status ||= begin
    return fake_response if opts[:simulate]

    r = Unirest.get status_check_url

    unless (200..299).include?(r.code)
      fail "Error code: #{r.code}\n" \
           "Headers: #{r.headers}" \
           "Body: #{r.body}"
    end

    r.body
  end
end

#down_hosts ⇒ Object 



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# File 'lib/upstreamstatus.rb', line 54

def down_hosts
  current_status['servers']['server'].select { |s| s['status'] != 'up' }
end

#run ⇒ Object 



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# File 'lib/upstreamstatus.rb', line 58

def run
  clear_active_alerts

  exit 0 if down_hosts.empty?

  puts "Detected down hosts:\n"
  print_hosts down_hosts
  logger.info "Detected down hosts: #{down_hosts.to_json}"

  if opts[:notify]
    down_hosts.each do |host|
      notify(
        "Upstream host #{host['upstream']} listed as down",
        host
      )
    end
  end
  exit 1
rescue Interrupt => e
  puts "Received #{e.class}"
  exit 99
rescue SignalException => e
  logger.info "Received: #{e.signm} (#{e.signo})"
  exit 2
rescue SystemExit => e
  exit e.status
rescue Exception => e # Need to rescue "Exception" so that Sentry gets it
  Raven.capture_exception(e) if sentry_dsn
  logger.fatal e.message
  logger.fatal e.backtrace.join("\n")
  raise e
end