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|
#!/usr/bin/env python
#coding: utf-8
#file : server_modules.py
#author : ning
#date : 2014-02-24 13:00:28
import os
import sys
from utils import *
import conf
class Base:
'''
Sub class should implement:
_alive, _pre_deploy, status, and init self.args
'''
def __init__(self, name, host, port, path):
self.args = {
'name' : name,
'host' : host,
'port' : port,
'path' : path,
#startcmd and runcmd will used to generate the control script
#used for the start cmd
'startcmd' : '',
#process name you see in `ps -aux`, used this to generate stop cmd
'runcmd' : '',
'logfile' : '',
}
def __str__(self):
return TT('[$name:$host:$port]', self.args)
def deploy(self):
logging.info('deploy %s' % self)
self._run(TTCMD('mkdir -p $path/bin && \
mkdir -p $path/conf && \
mkdir -p $path/log && \
mkdir -p $path/data',
self.args))
self._pre_deploy()
self._gen_control_script()
def _gen_control_script(self):
content = file(os.path.join(WORKDIR, 'conf/control.sh')).read()
content = TT(content, self.args)
control_filename = TT('${path}/${name}_control', self.args)
fout = open(control_filename, 'w+')
fout.write(content)
fout.close()
os.chmod(control_filename, 0755)
def start(self):
if self._alive():
logging.warn('%s already running' %(self) )
return
logging.debug('starting %s' % self)
t1 = time.time()
sleeptime = .1
cmd = TT("cd $path && ./${name}_control start", self.args)
self._run(cmd)
while not self._alive():
lets_sleep(sleeptime)
if sleeptime < 5:
sleeptime *= 2
else:
sleeptime = 5
logging.warn('%s still not alive' % self)
t2 = time.time()
logging.info('%s start ok in %.2f seconds' %(self, t2-t1) )
def stop(self):
if not self._alive():
logging.warn('%s already stop' %(self) )
return
cmd = TT("cd $path && ./${name}_control stop", self.args)
self._run(cmd)
t1 = time.time()
while self._alive():
lets_sleep()
t2 = time.time()
logging.info('%s stop ok in %.2f seconds' %(self, t2-t1) )
def pid(self):
cmd = TT("pgrep -f '^$runcmd'", self.args)
return self._run(cmd)
def status(self):
logging.warn("status: not implement")
def _alive(self):
logging.warn("_alive: not implement")
def _run(self, raw_cmd):
ret = system(raw_cmd, logging.debug)
logging.debug('return : [%d] [%s] ' % (len(ret), shorten(ret)) )
return ret
def clean(self):
cmd = TT("rm -rf $path", self.args)
self._run(cmd)
def host(self):
return self.args['host']
def port(self):
return self.args['port']
class RedisServer(Base):
def __init__(self, host, port, path, cluster_name, server_name, auth = None):
Base.__init__(self, 'redis', host, port, path)
self.args['startcmd'] = TT('bin/redis-server conf/redis.conf', self.args)
self.args['runcmd'] = TT('redis-server \*:$port', self.args)
self.args['conf'] = TT('$path/conf/redis.conf', self.args)
self.args['pidfile'] = TT('$path/log/redis.pid', self.args)
self.args['logfile'] = TT('$path/log/redis.log', self.args)
self.args['dir'] = TT('$path/data', self.args)
self.args['REDIS_CLI'] = conf.BINARYS['REDIS_CLI']
self.args['cluster_name'] = cluster_name
self.args['server_name'] = server_name
self.args['auth'] = auth
def _info_dict(self):
cmd = TT('$REDIS_CLI -h $host -p $port INFO', self.args)
if self.args['auth']:
cmd = TT('$REDIS_CLI -h $host -p $port -a $auth INFO', self.args)
info = self._run(cmd)
info = [line.split(':', 1) for line in info.split('\r\n')
if not line.startswith('#')]
info = [i for i in info if len(i) > 1]
return defaultdict(str, info) #this is a defaultdict, be Notice
def _ping(self):
cmd = TT('$REDIS_CLI -h $host -p $port PING', self.args)
if self.args['auth']:
cmd = TT('$REDIS_CLI -h $host -p $port -a $auth PING', self.args)
return self._run(cmd)
def _alive(self):
return strstr(self._ping(), 'PONG')
def _gen_conf(self):
content = file(os.path.join(WORKDIR, 'conf/redis.conf')).read()
content = TT(content, self.args)
if self.args['auth']:
content += '\r\nrequirepass %s' % self.args['auth']
return content
def _pre_deploy(self):
self.args['BINS'] = conf.BINARYS['REDIS_SERVER_BINS']
self._run(TT('cp $BINS $path/bin/', self.args))
fout = open(TT('$path/conf/redis.conf', self.args), 'w+')
fout.write(self._gen_conf())
fout.close()
def status(self):
uptime = self._info_dict()['uptime_in_seconds']
if uptime:
logging.info('%s uptime %s seconds' % (self, uptime))
else:
logging.error('%s is down' % self)
def isslaveof(self, master_host, master_port):
info = self._info_dict()
if info['master_host'] == master_host and \
int(info['master_port']) == master_port:
logging.debug('already slave of %s:%s' % (master_host, master_port))
return True
def slaveof(self, master_host, master_port):
cmd = 'SLAVEOF %s %s' % (master_host, master_port)
return self.rediscmd(cmd)
def rediscmd(self, cmd):
args = copy.deepcopy(self.args)
args['cmd'] = cmd
cmd = TT('$REDIS_CLI -h $host -p $port $cmd', args)
logging.info('%s %s' % (self, cmd))
return self._run(cmd)
class Memcached(Base):
def __init__(self, host, port, path, cluster_name, server_name):
Base.__init__(self, 'memcached', host, port, path)
self.args['startcmd'] = TT('bin/memcached -d -p $port', self.args)
self.args['runcmd'] = self.args['startcmd']
self.args['cluster_name'] = cluster_name
self.args['server_name'] = server_name
def _alive(self):
cmd = TT('echo "stats" | socat - TCP:$host:$port', self.args)
ret = self._run(cmd)
return strstr(ret, 'END')
def _pre_deploy(self):
self.args['BINS'] = conf.BINARYS['MEMCACHED_BINS']
self._run(TT('cp $BINS $path/bin/', self.args))
class NutCracker(Base):
def __init__(self, host, port, path, cluster_name, masters, mbuf=512,
verbose=5, is_redis=True, redis_auth=None):
Base.__init__(self, 'nutcracker', host, port, path)
self.masters = masters
self.args['mbuf'] = mbuf
self.args['verbose'] = verbose
self.args['redis_auth'] = redis_auth
self.args['conf'] = TT('$path/conf/nutcracker.conf', self.args)
self.args['pidfile'] = TT('$path/log/nutcracker.pid', self.args)
self.args['logfile'] = TT('$path/log/nutcracker.log', self.args)
self.args['status_port'] = self.args['port'] + 1000
self.args['startcmd'] = TTCMD('bin/nutcracker -d -c $conf -o $logfile \
-p $pidfile -s $status_port \
-v $verbose -m $mbuf -i 1', self.args)
self.args['runcmd'] = TTCMD('bin/nutcracker -d -c $conf -o $logfile \
-p $pidfile -s $status_port', self.args)
self.args['cluster_name']= cluster_name
self.args['is_redis']= str(is_redis).lower()
def _alive(self):
return self._info_dict()
def _gen_conf_section(self):
template = ' - $host:$port:1 $server_name'
cfg = '\n'.join([TT(template, master.args) for master in self.masters])
return cfg
def _gen_conf(self):
content = '''
$cluster_name:
listen: 0.0.0.0:$port
hash: fnv1a_64
distribution: modula
preconnect: true
auto_eject_hosts: false
redis: $is_redis
backlog: 512
timeout: 400
client_connections: 0
server_connections: 1
server_retry_timeout: 2000
server_failure_limit: 2
servers:
'''
if self.args['redis_auth']:
content = content.replace('redis: $is_redis',
'redis: $is_redis\r\n redis_auth: $redis_auth')
content = TT(content, self.args)
return content + self._gen_conf_section()
def _pre_deploy(self):
self.args['BINS'] = conf.BINARYS['NUTCRACKER_BINS']
self._run(TT('cp $BINS $path/bin/', self.args))
fout = open(TT('$path/conf/nutcracker.conf', self.args), 'w+')
fout.write(self._gen_conf())
fout.close()
def version(self):
#This is nutcracker-0.4.0
s = self._run(TT('$BINS --version', self.args))
return s.strip().replace('This is nutcracker-', '')
def _info_dict(self):
try:
c = telnetlib.Telnet(self.args['host'], self.args['status_port'])
ret = c.read_all()
return json_decode(ret)
except Exception, e:
logging.debug('can not get _info_dict of nutcracker, \
[Exception: %s]' % (e, ))
return None
def reconfig(self, masters):
self.masters = masters
self.stop()
self.deploy()
self.start()
logging.info('proxy %s:%s is updated' % (self.args['host'], self.args['port']))
def logfile(self):
return self.args['logfile']
def cleanlog(self):
cmd = TT("rm '$logfile'", self.args)
self._run(cmd)
def signal(self, signo):
self.args['signo'] = signo
cmd = TT("pkill -$signo -f '^$runcmd'", self.args)
self._run(cmd)
def reload(self):
self.signal('USR1')
def set_config(self, content):
fout = open(TT('$path/conf/nutcracker.conf', self.args), 'w+')
fout.write(content)
fout.close()
self.reload()
|
