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#!/usr/bin/env python
import os
import json
import subprocess
import sys
import time
def juju_info(msg):
subprocess.check_call(['juju-log', '-l', 'INFO', msg])
pass
def _config():
output = subprocess.check_output(['config-get', '--format=json'])
return json.loads(output)
def _relation_ids(relation_types=('db',)):
# accept strings or iterators
if isinstance(relation_types, basestring):
reltypes = [relation_types, ]
else:
reltypes = relation_types
relids = []
for reltype in reltypes:
relid_cmd_line = ['relation-ids', '--format=json', reltype]
json_relids = subprocess.check_output(relid_cmd_line).strip()
if json_relids:
relids.extend(json.loads(json_relids))
return relids
def _relation_get(key):
return subprocess.check_output(['relation-get', key]).strip()
def _relation_set(keyvalues, relation_id=None):
args = ['relation-set']
if relation_id:
args.extend(['-r', relation_id])
args.extend(["{}={}".format(k, v or '') for k, v in keyvalues.items()])
subprocess.check_call(args)
def _service_dir(config):
unit = os.environ['JUJU_UNIT_NAME'].split('/')[0]
for x in (':', '-', '/', '"', "'"):
unit = unit.replace(x, '_')
return os.path.join(config['install_root'], unit)
def install(config):
pkgs = [x for x in config['packages'].split(' ') if x]
pkgs.append('bzr')
pkgs.append('python-pip') # required for restish?
juju_info('installing apt packages...')
subprocess.check_call(['apt-get', 'install', '-y', '-q'] + pkgs)
juju_info('installing restish...')
restish = 'restish==%s' % config['restish_version']
subprocess.check_call(['pip', 'install', restish])
juju_info('grabbing service from bzr...')
args = ['bzr', 'branch']
rev = config.get('revno', '')
if rev:
args.extend(['-r', rev])
args.append(config['branch'])
args.append(_service_dir(config))
subprocess.check_call(args)
def start(config):
service = 'restish'
conf = '/etc/init/%s.sh' % service
if os.path.exists(conf):
try:
subprocess.check_call(['service', 'restart', service])
except subprocess.CalledProcessError:
# if it wasn't running, restart fails, so just try to start
subprocess.check_call(['service', 'start', service])
def stop(config):
service = 'restish'
conf = '/etc/init/%s.sh' % service
if os.path.exists(conf):
subprocess.check_call(['service', 'stop', service])
def config_changed(config):
# Trigger WSGI reloading
for relid in _relation_ids('wsgi'):
_relation_set({'wsgi_timestamp': time.time()}, relation_id=relid)
def website_relation_joined(config):
host = subprocess.check_output(['unit-get', 'private-address']).strip()
_relation_set({'port': config["port"], 'hostname': host})
def website_relation_changed(config):
return website_relation_joined(config)
def website_relation_broken(config):
pass
def wsgi_relation_joined(config):
sdir = _service_dir(config)
_relation_set({'working_dir': sdir})
for var in config:
if var.startswith('wsgi_') or var in ['listen_ip', 'port']:
_relation_set({var: config[var]})
path = config.get('python_path')
if path:
full_path = []
for p in path.split(':'):
if p[0] != '/':
p = os.path.join(sdir, p)
full_path.append(p)
_relation_set({'python_path': ':'.join(full_path)})
port = config.get('port')
if port:
subprocess.call(['open-port', "%s/TCP" % port])
def wsgi_relation_changed(config):
return wsgi_relation_joined(config)
def wsgi_relation_broken(config):
port = config.get('port')
if port:
subprocess.call(['close-port', "%s/TCP" % port])
def amqp_relation_joined(config):
_relation_set({
'username': config['amqp-user'],
'vhost': config['amqp-vhost'],
})
def amqp_relation_changed(config):
with open(os.path.join(_service_dir(config), 'amqp_config.py'), 'w') as f:
f.write('# DO NOT EDIT. Generated by restish charm hook\n')
f.write('AMQP_USER = "%s"\n' % config['amqp-user'])
f.write('AMQP_VHOST = "%s"\n' % config['amqp-vhost'])
f.write('AMQP_HOST = "%s"\n' % _relation_get('private-address'))
f.write('AMQP_PASSWORD = "%s"\n' % _relation_get('password'))
def amqp_relation_broken(config):
os.unlink(os.path.join(_service_dir(config), 'amqp_config.py'))
def lander_jenkins_relation_joined(config):
host = subprocess.check_output(['unit-get', 'private-address']).strip()
_relation_set({
'lander_api_hostname': host,
})
def lander_jenkins_relation_changed(config):
data = {
"lander_username": _relation_get('username'),
"lander_password": _relation_get('password'),
"lander_hostname": _relation_get('hostname'),
"lander_port": _relation_get('port'),
"lander_master_job": _relation_get('master_job'),
"lander_job_token": _relation_get('job_token'),
}
with open(os.path.join(_service_dir(config), 'lander_config.json'),
'w') as f:
f.write(json.dumps(data))
f.write('\n')
def lander_jenkins_relation_broken(config):
os.unlink(os.path.join(_service_dir(config), 'lander_config.json'))
def main():
hook = os.path.basename(sys.argv[0])
juju_info("Running hook: %s" % hook)
hook_py = hook.replace('-', '_')
funcs = globals()
if hook_py not in funcs:
print("Unknown hook: %s" % hook)
return 1
config = _config()
try:
return funcs[hook_py](config)
except subprocess.CalledProcessError as e:
juju_info('Error running: %s: %s' % (e.cmd, e.output))
return e.returncode
if __name__ == '__main__':
exit(main())
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