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Contents
module EY
class BigBrother
def self.check(chef_dna = '/etc/chef/dna.json')
json = JSON.parse(File.read(chef_dna))
# {'skip':[
# 'mysqld'
# ],
# 'check':[
# 'ttsrv'
# ]}
skips = JSON.parse(File.read('/etc/ey-alerts.json')) rescue {}
new(json.merge(skips)).check
end
def initialize(dna)
@dna = dna
@result = {}
end
def nginx_or_apache
server = ''
@dna['applications'].each do |name, app_data|
if app_data['recipes'].detect { |r| r == 'nginx' }
server = 'nginx'
end
if app_data['recipes'].detect { |r| r == 'passenger' }
server = 'apache2'
end
end
server
end
def skip?(name)
(@dna['skip']||[]).include?(name)
end
def check
case @dna['instance_role']
when 'solo'
check_process(nginx_or_apache) unless skip?(nginx_or_apache)
check_mysql unless skip?('mysqld')
when 'app', 'app_master'
check_process(nginx_or_apache) unless skip?(nginx_or_apache)
check_process('haproxy') unless skip?('haproxy')
when 'db_master', 'db_slave'
check_mysql unless skip?('mysqld')
when 'util'
end
(@dna['check']||[]).each do |check|
check_process(check)
end
@result.to_json
end
def check_mysql
check_process('mysqld')
DBI.connect("DBI:Mysql:mysql:#{@dna['db_host']}", 'root', @dna['users'].first['password'])
rescue DBI::DatabaseError => e
@result['mysqld'] = 'down'
end
def check_process(name)
return if name == ''
pids = `pgrep #{name}`.split("\n")
if pids.empty?
@result[name] = 'down'
else
if pids.detect {|p| `kill -0 #{p}; echo $?`.chomp.to_i != 0}
@result[name] = 'down'
else
@result[name] = 'up'
end
end
end
end
end
Version data entries
14 entries across 14 versions & 1 rubygems