saltstack源码-启动1

lyl801013

　　决定看salt的源码了.干脆就从最基本的看起来,先看它的启动过程开始
第一步用/etc/init.d/salt-master start 启动
找到那个文件,发现有3种启动方式,suse,debian,centos的启动方式各不一样,我测试机和线上环境都是centos的,所以直接就看Centos的



......
PYTHON=/usr/bin/python
SALTMASTER=/usr/bin/salt-master
MASTER_ARGS=""
......
stat() {
......
elif $PYTHON $SALTMASTER -d $MASTER_ARGS >& /dev/null; then
echo -n "OK"
RETVAL=0
......
}
.......
　　从这个脚本看到其实就是执行了/usr/bin/salt-master  这个文件
继续往下查看文件 /usr/bin/salt-master
文件的全部类容就几行



#!/usr/bin/python
'''
Start the salt-master
'''
from salt.scripts import salt_master
if __name__ == '__main__':
salt_master()
　　调用了salt.scripts下的salt_master 函数
找到目标文件和目标函数/usr/lib/python2.6/site-packages/salt/script.py



#!/usr/bin/python
import os
import sys
# Import salt libs
import salt  #包含本身的模块 路径:/usr/lib/python2.6/site-packages/salt/__init__.py
import salt.cli #这个暂时不知道干嘛的,以后再来分析 这个包含的路径是/usr/lib/python2.6/site-packages/salt/cli/__init__.py
def salt_master():
'''
Start the salt-master.
'''
master = salt.Master()
master.start()
　　这里是调用了salt模块的Master类的start方法,我在salt目录下找了下没发现Master文件名相关的文件,那么一定就是在salt目录下的__init__.py文件里面
目标文件,目标类,目标类方法是在:/usr/lib/python2.6/site-packages/salt/__init__.py



class Master(parsers.MasterOptionParser):
'''
#这个类的继承是继承自/usr/lib/python2.6/site-packages/salt/utils/parser.py里面的
#这个parsers.py模块重写了自带的标准库optoarse.py的几个方法
Creates a master server
'''
def prepare(self):
'''
Run the preparation sequence required to start a salt master server.
If sub-classed, don't **ever** forget to run:
super(YourSubClass, self).prepare()
'''
self.parse_args()
try:
if self.config['verify_env']:
verify_env(
[
self.config['pki_dir'],
os.path.join(self.config['pki_dir'], 'minions'),
os.path.join(self.config['pki_dir'], 'minions_pre'),
os.path.join(self.config['pki_dir'],
'minions_rejected'),
self.config['cachedir'],
os.path.join(self.config['cachedir'], 'jobs'),
os.path.join(self.config['cachedir'], 'proc'),
self.config['sock_dir'],
self.config['token_dir'],
],
self.config['user'],
permissive=self.config['permissive_pki_access'],
pki_dir=self.config['pki_dir'],
)
logfile = self.config['log_file']
if logfile is not None and not logfile.startswith(('tcp://',
'udp://',
'file://')):
# Logfile is not using Syslog, verify
verify_files([logfile], self.config['user'])
except OSError as err:
sys.exit(err.errno)
self.setup_logfile_logger()
logger.info('Setting up the Salt Master')
if not verify_socket(self.config['interface'],
self.config['publish_port'],
self.config['ret_port']):
self.exit(4, 'The ports are not available to bind\n')
self.config['interface'] = ip_bracket(self.config['interface'])
migrations.migrate_paths(self.config)
# Late import so logging works correctly
import salt.master
self.master = salt.master.Master(self.config)
self.daemonize_if_required()
self.set_pidfile()
def start(self):
'''
Start the actual master.
If sub-classed, don't **ever** forget to run:
super(YourSubClass, self).start()
NOTE: Run any required code before calling `super()`.
'''
self.prepare() #这里调用自己的prepare的方法
if check_user(self.config['user']):
try:
self.master.start()
except MasterExit:
self.shutdown()
finally:
sys.exit()
def shutdown(self):
'''
If sub-classed, run any shutdown operations on this method.
'''
　　一路追查下去,发现我2个24寸的显示器根本不够用,涉及的文件模块太多了
我都开始怀疑我到底是不是会python,我感觉我根本就没接触过python.....
我又恶补了一下关于python类的知识和optparse标准库
好吧,先休息一会出去走一下,放松自己凌乱的脑袋