kopia lustrzana https://github.com/piku/piku
657 wiersze
20 KiB
Python
657 wiersze
20 KiB
Python
#!/usr/bin/env python
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import os, sys, stat, re, shutil, socket
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from click import argument, command, group, option, secho as echo
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from collections import defaultdict, deque
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from glob import glob
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from multiprocessing import cpu_count
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from os.path import abspath, basename, dirname, exists, getmtime, join, realpath, splitext
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from subprocess import call, check_output
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from time import sleep
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# === Globals - all tweakable settings are here ===
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PIKU_ROOT = os.environ.get('PIKU_ROOT', join(os.environ['HOME'],'.piku'))
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APP_ROOT = abspath(join(PIKU_ROOT, "apps"))
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ENV_ROOT = abspath(join(PIKU_ROOT, "envs"))
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GIT_ROOT = abspath(join(PIKU_ROOT, "repos"))
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LOG_ROOT = abspath(join(PIKU_ROOT, "logs"))
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UWSGI_AVAILABLE = abspath(join(PIKU_ROOT, "uwsgi-available"))
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UWSGI_ENABLED = abspath(join(PIKU_ROOT, "uwsgi-enabled"))
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UWSGI_ROOT = abspath(join(PIKU_ROOT, "uwsgi"))
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UWSGI_LOG_MAXSIZE = '1048576'
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# === Utility functions ===
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def sanitize_app_name(app):
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"""Sanitize the app name and build matching path"""
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app = "".join(c for c in app if c.isalnum() or c in ('.','_')).rstrip()
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return app
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def exit_if_invalid(app):
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"""Utility function for error checking upon command startup."""
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app = sanitize_app_name(app)
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if not exists(join(APP_ROOT, app)):
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echo("Error: app '%s' not found." % app, fg='red')
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exit(1)
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return app
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def get_free_port(address=""):
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"""Find a free TCP port (entirely at random)"""
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s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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s.bind((address,0))
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port = s.getsockname()[1]
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s.close()
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return port
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def write_config(filename, bag, separator='='):
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"""Helper for writing out config files"""
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with open(filename, 'w') as h:
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for k, v in bag.iteritems():
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h.write('%s%s%s\n' % (k,separator,str(v)))
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def setup_authorized_keys(ssh_fingerprint, script_path, pubkey):
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"""Sets up an authorized_keys file to redirect SSH commands"""
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authorized_keys = join(os.environ['HOME'],'.ssh','authorized_keys')
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if not exists(dirname(authorized_keys)):
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os.makedirs(dirname(authorized_keys))
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# Restrict features and force all SSH commands to go through our script
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with open(authorized_keys, 'a') as h:
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h.write("""command="FINGERPRINT=%(ssh_fingerprint)s NAME=default %(script_path)s $SSH_ORIGINAL_COMMAND",no-agent-forwarding,no-user-rc,no-X11-forwarding,no-port-forwarding %(pubkey)s\n""" % locals())
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os.chmod(authorized_keys, stat.S_IRUSR | stat.S_IWUSR)
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def parse_procfile(filename):
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"""Parses a Procfile and returns the worker types. Only one worker of each type is allowed."""
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workers = {}
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if not exists(filename):
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return None
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with open(filename, 'r') as procfile:
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for line in procfile:
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try:
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kind, command = map(lambda x: x.strip(), line.split(":", 1))
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if kind in ['web', 'worker', 'wsgi']:
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workers[kind] = command
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except:
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echo("Warning: unrecognized Procfile declaration '%s'" % line, fg='yellow')
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if not len(workers):
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return {}
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# WSGI trumps regular web workers
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if 'wsgi' in workers:
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if 'web' in workers:
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del(workers['web'])
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return workers
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def parse_settings(filename, env={}):
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"""Parses a settings file and returns a dict with environment variables"""
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def expandvars(buffer, env, default=None, skip_escaped=False):
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def replace_var(match):
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return env.get(match.group(2) or match.group(1), match.group(0) if default is None else default)
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pattern = (r'(?<!\\)' if skip_escaped else '') + r'\$(\w+|\{([^}]*)\})'
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return re.sub(pattern, replace_var, buffer)
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if not exists(filename):
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return {}
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with open(filename, 'r') as settings:
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for line in settings:
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if '#' == line[0]: # allow for comments
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continue
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try:
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k, v = map(lambda x: x.strip(), line.split("=", 1))
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env[k] = expandvars(v, env)
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except:
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echo("Error: malformed setting '%s', ignoring file." % line, fg='red')
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return {}
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return env
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def do_deploy(app, deltas={}):
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"""Deploy an app by resetting the work directory"""
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app_path = join(APP_ROOT, app)
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procfile = join(app_path, 'Procfile')
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log_path = join(LOG_ROOT, app)
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env = {'GIT_WORK_DIR': app_path}
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if exists(app_path):
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echo("-----> Deploying app '%s'" % app, fg='green')
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call('git pull --quiet', cwd=app_path, env=env, shell=True)
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call('git checkout -f', cwd=app_path, env=env, shell=True)
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if not exists(log_path):
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os.makedirs(log_path)
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workers = parse_procfile(procfile)
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if len(workers):
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if exists(join(app_path, 'requirements.txt')):
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echo("-----> Python app detected.", fg='green')
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deploy_python(app, deltas)
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# if exists(join(app_path, 'Godeps')) or len(glob(join(app_path),'*.go')):
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# Go deployment
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else:
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echo("-----> Could not detect runtime!", fg='red')
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# TODO: detect other runtimes
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else:
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echo("Error: Invalid Procfile for app '%s'." % app, fg='red')
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else:
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echo("Error: app '%s' not found." % app, fg='red')
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def deploy_python(app, deltas={}):
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"""Deploy a Python application"""
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virtualenv_path = join(ENV_ROOT, app)
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requirements = join(APP_ROOT, app, 'requirements.txt')
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first_time = False
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if not exists(virtualenv_path):
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echo("-----> Creating virtualenv for '%s'" % app, fg='green')
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os.makedirs(virtualenv_path)
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call('virtualenv %s' % app, cwd=ENV_ROOT, shell=True)
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first_time = True
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activation_script = join(virtualenv_path,'bin','activate_this.py')
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execfile(activation_script, dict(__file__=activation_script))
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if first_time or getmtime(requirements) > getmtime(virtualenv_path):
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echo("-----> Running pip for '%s'" % app, fg='green')
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call('pip install -r %s' % requirements, cwd=virtualenv_path, shell=True)
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spawn_app(app, deltas)
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def spawn_app(app, deltas={}):
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"""Create all workers for an app"""
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app_path = join(APP_ROOT, app)
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procfile = join(app_path, 'Procfile')
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workers = parse_procfile(procfile)
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ordinals = defaultdict(lambda:1)
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worker_count = {k:1 for k in workers.keys()}
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# the Python virtualenv
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virtualenv_path = join(ENV_ROOT, app)
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# Settings shipped with the app
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env_file = join(APP_ROOT, app, 'ENV')
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# Custom overrides
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settings = join(ENV_ROOT, app, 'ENV')
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# Live settings
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live = join(ENV_ROOT, app, 'LIVE_ENV')
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# Scaling
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scaling = join(ENV_ROOT, app, 'SCALING')
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# Bootstrap environment
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env = {
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'PATH': os.environ['PATH'],
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'VIRTUAL_ENV': virtualenv_path,
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'PORT': str(get_free_port()),
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'PWD': dirname(env_file),
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}
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# Load environment variables shipped with repo (if any)
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if exists(env_file):
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env.update(parse_settings(env_file, env))
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# Override with custom settings (if any)
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if exists(settings):
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env.update(parse_settings(settings, env))
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# Configured worker count
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if exists(scaling):
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worker_count.update({k: int(v) for k,v in parse_procfile(scaling).iteritems()})
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to_create = {}
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to_destroy = {}
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for k, v in worker_count.iteritems():
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to_create[k] = range(1,worker_count[k] + 1)
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if k in deltas and deltas[k]:
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to_create[k] = range(1, worker_count[k] + deltas[k] + 1)
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if deltas[k] < 0:
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to_destroy[k] = range(worker_count[k], worker_count[k] + deltas[k], -1)
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worker_count[k] = worker_count[k]+deltas[k]
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# Save current settings
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write_config(live, env)
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write_config(scaling, worker_count, ':')
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# Create new workers
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for k, v in to_create.iteritems():
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for w in v:
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enabled = join(UWSGI_ENABLED, '%s_%s.%d.ini' % (app, k, w))
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if not exists(enabled):
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echo("-----> Spawning '%s:%s.%d'" % (app, k, w), fg='green')
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spawn_worker(app, k, workers[k], env, w)
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# Remove unnecessary workers (leave logfiles)
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for k, v in to_destroy.iteritems():
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for w in v:
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enabled = join(UWSGI_ENABLED, '%s_%s.%d.ini' % (app, k, w))
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if exists(enabled):
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echo("-----> Terminating '%s:%s.%d'" % (app, k, w), fg='yellow')
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os.unlink(enabled)
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def spawn_worker(app, kind, command, env, ordinal=1):
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"""Set up and deploy a single worker of a given kind"""
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env_path = join(ENV_ROOT, app)
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available = join(UWSGI_AVAILABLE, '%s_%s.%d.ini' % (app, kind, ordinal))
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enabled = join(UWSGI_ENABLED, '%s_%s.%d.ini' % (app, kind, ordinal))
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settings = [
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('virtualenv', join(ENV_ROOT, app)),
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('chdir', join(APP_ROOT, app)),
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('master', 'true'),
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('project', app),
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('max-requests', '1000'),
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('processes', '1'),
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('procname-prefix', '%s:%s:' % (app, kind)),
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('enable-threads', 'true'),
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('log-maxsize', UWSGI_LOG_MAXSIZE),
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('logto', '%s.%d.log' % (join(LOG_ROOT, app, kind), ordinal)),
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('log-backupname', '%s.%d.log.old' % (join(LOG_ROOT, app, kind), ordinal)),
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]
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for k, v in env.iteritems():
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settings.append(('env', '%s=%s' % (k,v)))
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if kind == 'wsgi':
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echo("-----> Setting HTTP port to %s" % env['PORT'], fg='yellow')
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settings.extend([
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('module', command),
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('threads', '4'),
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('plugin', 'python'),
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('http', ':%s' % env['PORT']),
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('http-socket', ':%s' % env['PORT']),
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])
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else:
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settings.append(('attach-daemon', command))
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with open(available, 'w') as h:
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h.write('[uwsgi]\n')
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for k, v in settings:
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h.write("%s = %s\n" % (k, v))
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shutil.copyfile(available, enabled)
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def multi_tail(app, filenames, catch_up=20):
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"""Tails multiple log files"""
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# Seek helper
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def peek(handle):
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where = handle.tell()
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line = handle.readline()
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if not line:
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handle.seek(where)
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return None
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return line
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inodes = {}
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files = {}
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prefixes = {}
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# Set up current state for each log file
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for f in filenames:
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prefixes[f] = splitext(basename(f))[0]
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files[f] = open(f)
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inodes[f] = os.stat(f).st_ino
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files[f].seek(0, 2)
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longest = max(map(len, prefixes.values()))
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# Grab a little history (if any)
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for f in filenames:
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for line in deque(open(f), catch_up):
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yield "%s | %s" % (prefixes[f].ljust(longest), line)
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while True:
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updated = False
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# Check for updates on every file
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for f in filenames:
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line = peek(files[f])
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if not line:
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continue
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else:
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updated = True
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yield "%s | %s" % (prefixes[f].ljust(longest), line)
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if not updated:
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sleep(1)
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# Check if logs rotated
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for f in filenames:
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if exists(f):
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if os.stat(f).st_ino != inodes[f]:
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files[f] = open(f)
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inodes[f] = os.stat(f).st_ino
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else:
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filenames.remove(f)
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# === CLI commands ===
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@group()
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def piku():
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"""The smallest PaaS you've ever seen"""
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pass
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@piku.resultcallback()
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def cleanup(ctx):
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"""Callback from command execution -- add debugging to taste"""
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pass
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# --- User commands ---
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@piku.command("apps")
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def list_apps():
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"""List applications"""
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for a in os.listdir(APP_ROOT):
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echo(a, fg='green')
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@piku.command("config")
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@argument('app')
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def deploy_app(app):
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"""Show application configuration"""
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app = exit_if_invalid(app)
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config_file = join(ENV_ROOT, app, 'ENV')
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if exists(config_file):
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echo(open(config_file).read().strip(), fg='white')
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else:
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echo("Warning: app '%s' not deployed, no config found." % app, fg='yellow')
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@piku.command("config:get")
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@argument('app')
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@argument('setting')
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def deploy_app(app, setting):
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"""Retrieve a configuration setting"""
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app = exit_if_invalid(app)
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config_file = join(ENV_ROOT, app, 'ENV')
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if exists(config_file):
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env = parse_settings(config_file)
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if setting in env:
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echo("%s" % env[setting], fg='white')
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else:
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echo("Warning: no active configuration for '%s'" % app)
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@piku.command("config:set")
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@argument('app')
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@argument('settings', nargs=-1)
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def deploy_app(app, settings):
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"""Set a configuration setting"""
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app = exit_if_invalid(app)
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config_file = join(ENV_ROOT, app, 'ENV')
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env = parse_settings(config_file)
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items = {}
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for s in settings:
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try:
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k, v = map(lambda x: x.strip(), s.split("=", 1))
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env[k] = v
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echo("Setting %s=%s for '%s'" % (k, v, app), fg='white')
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except:
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echo("Error: malformed setting '%s'" % s, fg='red')
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return
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write_config(config_file, env)
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do_deploy(app)
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@piku.command("config:live")
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@argument('app')
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def deploy_app(app):
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"""Show live configuration settings"""
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app = exit_if_invalid(app)
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live_config = join(ENV_ROOT, app, 'LIVE_ENV')
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if exists(live_config):
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echo(open(live_config).read().strip(), fg='white')
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else:
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echo("Warning: app '%s' not deployed, no config found." % app, fg='yellow')
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@piku.command("deploy")
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@argument('app')
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def deploy_app(app):
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"""Deploy an application"""
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app = exit_if_invalid(app)
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do_deploy(app)
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@piku.command("destroy")
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@argument('app')
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def destroy_app(app):
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"""Destroy an application"""
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app = exit_if_invalid(app)
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for p in [join(x, app) for x in [APP_ROOT, GIT_ROOT, ENV_ROOT, LOG_ROOT]]:
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if exists(p):
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echo("Removing folder '%s'" % p, fg='yellow')
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shutil.rmtree(p)
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for p in [join(x, '%s*.ini' % app) for x in [UWSGI_AVAILABLE, UWSGI_ENABLED]]:
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g = glob(p)
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if len(g):
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for f in g:
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echo("Removing file '%s'" % f, fg='yellow')
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os.remove(f)
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@piku.command("logs")
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@argument('app')
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def tail_logs(app):
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"""Tail an application log"""
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app = exit_if_invalid(app)
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logfiles = glob(join(LOG_ROOT, app, '*.log'))
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if len(logfiles):
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for line in multi_tail(app, logfiles):
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echo(line.strip(), fg='white')
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else:
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echo("No logs found for app '%s'." % app, fg='yellow')
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@piku.command("ps")
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@argument('app')
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def deploy_app(app):
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"""Show application worker count"""
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app = exit_if_invalid(app)
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config_file = join(ENV_ROOT, app, 'SCALING')
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if exists(config_file):
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echo(open(config_file).read().strip(), fg='white')
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else:
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echo("Error: no workers found for app '%s'." % app, fg='red')
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@piku.command("ps:scale")
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@argument('app')
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@argument('settings', nargs=-1)
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def deploy_app(app, settings):
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"""Show application configuration"""
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app = exit_if_invalid(app)
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config_file = join(ENV_ROOT, app, 'SCALING')
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worker_count = {k:int(v) for k, v in parse_procfile(config_file).iteritems()}
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items = {}
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deltas = {}
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for s in settings:
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try:
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k, v = map(lambda x: x.strip(), s.split("=", 1))
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c = int(v) # check for integer value
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|
if c < 0:
|
|
echo("Error: cannot scale type '%s' below 0" % k, fg='red')
|
|
return
|
|
if k not in worker_count:
|
|
echo("Error: worker type '%s' not present in '%s'" % (k, app), fg='red')
|
|
return
|
|
deltas[k] = c - worker_count[k]
|
|
except:
|
|
echo("Error: malformed setting '%s'" % s, fg='red')
|
|
return
|
|
do_deploy(app, deltas)
|
|
|
|
|
|
@piku.command("restart")
|
|
@argument('app')
|
|
def restart_app(app):
|
|
"""Restart an application"""
|
|
|
|
app = exit_if_invalid(app)
|
|
|
|
config = glob(join(UWSGI_ENABLED, '%s*.ini' % app))
|
|
|
|
if len(config):
|
|
echo("Restarting app '%s'..." % app, fg='yellow')
|
|
for c in config:
|
|
os.remove(c)
|
|
do_deploy(app)
|
|
else:
|
|
echo("Error: app '%s' not deployed!" % app, fg='red')
|
|
|
|
|
|
@piku.command("setup")
|
|
def init_paths():
|
|
"""Initialize environment"""
|
|
|
|
# Create required paths
|
|
for p in [APP_ROOT, GIT_ROOT, ENV_ROOT, UWSGI_ROOT, UWSGI_AVAILABLE, UWSGI_ENABLED, LOG_ROOT]:
|
|
if not exists(p):
|
|
echo("Creating '%s'." % p, fg='green')
|
|
os.makedirs(p)
|
|
|
|
# Set up the uWSGI emperor config
|
|
settings = [
|
|
('chdir', UWSGI_ROOT),
|
|
('emperor', UWSGI_ENABLED),
|
|
('log-maxsize', UWSGI_LOG_MAXSIZE),
|
|
('logto', join(UWSGI_ROOT, 'uwsgi.log')),
|
|
('log-backupname', join(UWSGI_ROOT, 'uwsgi.old.log')),
|
|
('socket', join(UWSGI_ROOT, 'uwsgi.sock')),
|
|
('enable-threads', 'true'),
|
|
('threads', '%d' % (cpu_count() * 2)),
|
|
]
|
|
with open(join(UWSGI_ROOT,'uwsgi.ini'), 'w') as h:
|
|
h.write('[uwsgi]\n')
|
|
for k, v in settings:
|
|
h.write("%s = %s\n" % (k, v))
|
|
|
|
# mark this script as executable (in case we were invoked via interpreter)
|
|
this_script = realpath(__file__)
|
|
if not(os.stat(this_script).st_mode & stat.S_IXUSR):
|
|
echo("Setting '%s' as executable." % this_script, fg='yellow')
|
|
os.chmod(this_script, os.stat(this_script).st_mode | stat.S_IXUSR)
|
|
|
|
|
|
@piku.command("setup:ssh")
|
|
@argument('public_key_file')
|
|
def add_key(public_key_file):
|
|
"""Set up a new SSH key"""
|
|
|
|
if exists(public_key_file):
|
|
try:
|
|
fingerprint = check_output('ssh-keygen -lf %s' % public_key_file, shell=True).split(' ',4)[1]
|
|
if re.match('(([0-9a-f]{2}\:){16})', '%s:' % fingerprint):
|
|
key = open(public_key_file).read().strip()
|
|
echo("Adding key '%s'." % fingerprint, fg='white')
|
|
setup_authorized_keys(fingerprint, realpath(__file__), key)
|
|
except:
|
|
echo("Error: invalid public key file '%s'" % public_key_file, fg='red')
|
|
else:
|
|
echo("Error: public key file '%s' not found." % public_key_file, fg='red')
|
|
|
|
|
|
@piku.command("stop")
|
|
@argument('app')
|
|
def stop_app(app):
|
|
"""Stop an application"""
|
|
|
|
app = exit_if_invalid(app)
|
|
|
|
config = glob(join(UWSGI_ENABLED, '%s*.ini' % app))
|
|
|
|
if len(config):
|
|
echo("Stopping app '%s'..." % app, fg='yellow')
|
|
for c in config:
|
|
os.remove(c)
|
|
else:
|
|
echo("Error: app '%s' not deployed!" % app, fg='red')
|
|
|
|
|
|
# --- Internal commands ---
|
|
|
|
@piku.command("git-hook")
|
|
@argument('app')
|
|
def git_hook(app):
|
|
"""INTERNAL: Post-receive git hook"""
|
|
|
|
app = sanitize_app_name(app)
|
|
repo_path = join(GIT_ROOT, app)
|
|
app_path = join(APP_ROOT, app)
|
|
|
|
for line in sys.stdin:
|
|
oldrev, newrev, refname = line.strip().split(" ")
|
|
#print "refs:", oldrev, newrev, refname
|
|
if refname == "refs/heads/master":
|
|
# Handle pushes to master branch
|
|
if not exists(app_path):
|
|
echo("-----> Creating app '%s'" % app, fg='green')
|
|
os.makedirs(app_path)
|
|
call('git clone --quiet %s %s' % (repo_path, app), cwd=APP_ROOT, shell=True)
|
|
do_deploy(app)
|
|
else:
|
|
# TODO: Handle pushes to another branch
|
|
echo("receive-branch '%s': %s, %s" % (app, newrev, refname))
|
|
|
|
|
|
@piku.command("git-receive-pack")
|
|
@argument('app')
|
|
def receive(app):
|
|
"""INTERNAL: Handle git pushes for an app"""
|
|
|
|
app = sanitize_app_name(app)
|
|
hook_path = join(GIT_ROOT, app, 'hooks', 'post-receive')
|
|
|
|
if not exists(hook_path):
|
|
os.makedirs(dirname(hook_path))
|
|
# Initialize the repository with a hook to this script
|
|
call("git init --quiet --bare " + app, cwd=GIT_ROOT, shell=True)
|
|
with open(hook_path,'w') as h:
|
|
h.write("""#!/usr/bin/env bash
|
|
set -e; set -o pipefail;
|
|
cat | PIKU_ROOT="%s" %s git-hook %s""" % (PIKU_ROOT, realpath(__file__), app))
|
|
# Make the hook executable by our user
|
|
os.chmod(hook_path, os.stat(hook_path).st_mode | stat.S_IXUSR)
|
|
# Handle the actual receive. We'll be called with 'git-hook' after it happens
|
|
call('git-shell -c "%s"' % " ".join(sys.argv[1:]), cwd=GIT_ROOT, shell=True)
|
|
|
|
|
|
if __name__ == '__main__':
|
|
piku()
|