Running remote mysqldump over SSH all in python -


hi im trying write python script ssh remote server , execute mysqldump. method far establish portforwarding run backup script had written. suspect issue in portforwarding backup script pretty straightforward. here portforwarding:

import getpass import os import socket import select import socketserver import sys  import paramiko  username = 'myusername' remote_server = 'remote.servername' remote_port = 3306 local_server = '127.0.0.1' local_port = 3307 ssh_port = 22 password = none keyfile = 'hosting.pem'  g_verbose = true   class forwardserver (socketserver.threadingtcpserver):     daemon_threads = true     allow_reuse_address = true   class handler (socketserver.baserequesthandler):      def handle(self):         try:             chan = self.ssh_transport.open_channel('direct-tcpip',                                                    (self.chain_host, self.chain_port),                                                    self.request.getpeername())         except exception, e:             verbose('incoming request %s:%d failed: %s' % (self.chain_host,                                                               self.chain_port,                                                               repr(e)))             return         if chan none:             verbose('incoming request %s:%d rejected ssh server.' %                     (self.chain_host, self.chain_port))             return          verbose('connected!  tunnel open %r -> %r -> %r' % (self.request.getpeername(),                                                             chan.getpeername(), (self.chain_host, self.chain_port)))         while true:             r, w, x = select.select([self.request, chan], [], [])             if self.request in r:                 data = self.request.recv(1024)                 if len(data) == 0:                     break                 chan.send(data)             if chan in r:                 data = chan.recv(1024)                 if len(data) == 0:                     break                 self.request.send(data)         chan.close()         self.request.close()         verbose('tunnel closed %r' % (self.request.getpeername(),))   def forward_tunnel(local_port, remote_host, remote_port, transport):     # little convoluted, lets me configure things handler     # object.  (socketserver doesn't give handlers way access outer     # server normally.)     class subhander (handler):         chain_host = remote_host         chain_port = remote_port         ssh_transport = transport     forwardserver(('', local_port), subhander).serve_forever()   def verbose(s):     if g_verbose:         print s    def pforward():     paramiko.util.log_to_file('demo.log')     client = paramiko.sshclient()     client.load_system_host_keys()     client.set_missing_host_key_policy(paramiko.warningpolicy())      try:         client.connect(remote_server, ssh_port, username, key_filename=keyfile,                        look_for_keys=true)     except exception, e:         print '*** failed connect %s:%d: %r' % (remote_server, ssh_port, e)         sys.exit(1)      verbose('now forwarding port %d %s:%d ...' % (local_port, remote_server, remote_port))      try:         forward_tunnel(local_port, remote_server, remote_port, client.get_transport())     except keyboardinterrupt:         print 'c-c: port forwarding stopped.'         sys.exit(0) pforward()

then once thats run mysql backup script:

import mysqldb import os   conn = mysqldb.connect (     host = "127.0.0.1",     user = "root",     passwd = "password"     port = 3307)  cursor = conn.cursor()  cursor.execute("show databases")  results = cursor.fetchall() cursor.close() conn.close() print results result in results:     backupfile=result[0]+".sql.gz"     cmd="echo 'back "+result[0]+" database yourlocation/"+backupfile+"'"     os.system(cmd)     cmd="mysqldump -u "+user+" -h "+host+" -p"+passwd+" --opt --routines --flush-privileges --single-transaction --database "+result[0]+" | gzip -9 --rsyncable > yourlocation/"+backupfile

this error get:

_mysql_exceptions.operationalerror: (2013, "lost connection mysql server @ 'waiting initial communication packet', system error: 0")

ok- guess over-thinking it, no need set port forwarding , mess. here solution>

# -*- coding: utf-8 -*- # <nbformat>3.0</nbformat>  import paramiko import os   savefile = 'dump.sql' mykey = paramiko.rsakey.from_private_key_file("/users/me/my-host.pem")  client = paramiko.sshclient() client.load_system_host_keys() client.connect('hungry.turtles.com', username = "turtles", pkey = mykey)   def ssh(cmd):     out = []     msg = [stdin, stdout, stderr] = client.exec_command(cmd)     item in msg:         try:             line in item:                 out.append(line.strip('\n'))         except: pass      return(list(out))  dump = ssh('mysqldump -u root -ppassword turtleturds')  file = open(savefile, 'w') file.write(str(dump)) file.close() print 'the dump had '+ str(len(dump))+ ' lines , saved '+ str(os.path.realpath('dump.sql'))

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