Source code of saltstack-start 1

I decided to look at the source code of salt. Simply look at it from the basic perspective, first look at its startup process.
Step 1 start with/etc/init. d/salt-master start
Find the file and find that there are three startup Methods: Suse, Debian, and centos. My testing machine and online environment are centos, so you can directly look at centos's

......PYTHON=/usr/bin/pythonSALTMASTER=/usr/bin/salt-masterMASTER_ARGS=""......stat() {    ......    elif $PYTHON $SALTMASTER -d $MASTER_ARGS >& /dev/null; then            echo -n "OK"            RETVAL=0    ......}.......

From this script, the file/usr/bin/salt-master is actually executed.
Continue to view the file/usr/bin/salt-Master
Only a few lines are supported for all classes of the file.

#!/usr/bin/python‘‘‘Start the salt-master‘‘‘from salt.scripts import salt_master if __name__ == ‘__main__‘:    salt_master()

The salt_master function in salt. scripts is called.
Find the target file and function/usr/lib/python2.6/Site-packages/salt/script. py

#! /Usr/bin/pythonimport osimport sys # import salt libsimport salt # contains its own module path:/usr/lib/python2.6/Site-packages/salt/_ init __. pyimport salt. CLI # I don't know what to do for the moment. I will analyze the included path later:/usr/lib/python2.6/Site-packages/salt/CLI/_ init __. PY def salt_master (): '''start the salt-master. '''master = salt. master () master. start ()

The start method of the master class of the salt module is called. I found no files related to the master file name in the salt directory, it must be _ init _ in the salt directory __. in The py file
Target file, target class, and target class methods are:/usr/lib/python2.6/Site-packages/salt/_ init _. py

Class master (parsers. masteroptionparser): ''' # the inheritance of this class is inherited from/usr/lib/python2.6/Site-packages/salt/utils/parser. # This parsers in Py. the py module overrides the built-in standard library optoarse. several methods of Py 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'], 'job'), 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']) Doesn't 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, '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 () # Call your own prepare method here if check_user (self. config ['user']): Try: Self. master. start () tables t masterexit: Self. shutdown () Finally: SYS. exit () def Shutdown (Self): ''' if sub-classed, run any shutdown operations on this method. '''

After tracing, I found that my two 24-inch monitors were not enough and there were too many file modules involved.
I began to doubt whether I could use python. I feel that I have never touched python .....
I have supplemented my knowledge about Python and the optparse standard library.
Okay. Take a rest and take a walk to relax your messy head.

Source code of saltstack-start 1