Created
June 28, 2012 20:10
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Watches Mongostat and notifies admins via email if lock % is above threashold
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require 'term/ansicolor' | |
require 'tlsmail' | |
task :watch_mongo do | |
@notified = false | |
file = Tempfile.new('stat_watch') | |
begin | |
Thread.new('mongostat') do | |
# mongostat --rowcount 0 20, will check every 20 seconds | |
%x[mongostat --rowcount 0 20 --host #{ENV['MONGO_HOST']} --username #{ENV['MONGO_USERNAME']} --password #{ENV['MONGO_PASSWORD']} --noheaders > #{file.path}] | |
end | |
sleep(2) | |
puts | |
puts | |
printf "%7s %7s %7s %7s %7s %7s %7s %7s %7s %7s %7s %7s %7s %7s %7s %7s %7s %7s %7s\n", | |
'insert' , 'query' ,'update' ,'delete', 'getmore', 'command' ,'flushes', 'mapped' , 'vsize', 'res', 'faults', 'locked %', 'idxmiss%', 'qr|qw' , 'ar|aw' , 'netIn', 'netOut', 'conn', 'time' | |
f = File.open(file,"r") | |
f.seek(0,IO::SEEK_END) | |
while true do | |
select([f]) | |
line = f.gets | |
parse_line(line) if line =~ /^/ && !(line =~ /^connected/) | |
end | |
ensure | |
puts "Closing!" | |
file.close | |
file.unlink # deletes the temp file | |
end | |
end | |
def parse_line(line) | |
items = line.split | |
inserts = items[0] | |
query = items[1] | |
update = items[2] | |
delete = items[3] | |
getmore = items[4] | |
command = items[5] | |
flushes = items[6] | |
mapped = items[7] | |
vsize = items[8] | |
res = items[9] | |
faults = items[10] | |
locked = items[11] | |
idx_miss = items[12] | |
qrw = items[13] | |
arw = items[14] | |
netIn = items[15] | |
netOut = items[16] | |
conn = items[17] | |
set = items[18] | |
repl = items[19] | |
time = items[20] | |
printf "%7s %7s %7s %7s %7s %7s %7s %7s %7s %7s", | |
inserts , query ,update ,delete, getmore, command ,flushes, mapped , vsize, res | |
print Term::ANSIColor.bold | |
printf '%7s', faults | |
l = Float(locked) | |
if l > 50 | |
print Term::ANSIColor.yellow | |
elsif l > 70 | |
print '\a' #beep | |
notify_admins | |
print Term::ANSIColor.red | |
end | |
printf '%7s', locked | |
print Term::ANSIColor.clear | |
printf "%7s %7s %7s %7s %7s %7s %7s\n", | |
idx_miss, qrw, arw, netIn, netOut, conn, time | |
end | |
def notify_admins | |
if @notified | |
puts 'already notified' | |
else | |
send_email(ENV['GMAIL_USERNAME']) | |
@notified = true | |
end | |
end | |
def send_email(to) | |
content = <<EOF | |
From: #{ENV['GMAIL_USERNAME']} | |
To: #{to} | |
Subject: Warning lock levels high | |
Date: #{Time.now.rfc2822} | |
Something is up, lock levels high | |
EOF | |
Net::SMTP.enable_tls(OpenSSL::SSL::VERIFY_NONE) | |
Net::SMTP.start('smtp.gmail.com', 587, 'gmail.com', ENV['GMAIL_USERNAME'], ENV['GMAIL_PASSWORD'], :login) do |smtp| | |
smtp.send_message(content, ENV['GMAIL_USERNAME'], to) | |
end | |
end |
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