Joshua M. Boniface
afb0359c20
This branch commit refactors the pvcnoded component to better adhere to good programming practices. The previous Daemon.py was a massive file which contained almost 2000 lines of direct, root-level code which was directly imported. Not only was this poor practice, but this resulted in a nigh-unmaintainable file which was hard even for me to understand. This refactoring splits a large section of the code from Daemon.py into separate small modules and functions in the `util/` directory. This will hopefully make most of the functionality easy to find and modify without having to dig through a single large file. Further the existing subcomponents have been moved to the `objects/` directory which clearly separates them. Finally, the Daemon.py code has mostly been moved into a function, `entrypoint()`, which is then called from the `pvcnoded.py` stub. An additional item is that most format strings have been replaced by f-strings to make use of the Python 3.6 features in Daemon.py and the utility files.
78 lines
3.2 KiB
Python
78 lines
3.2 KiB
Python
#!/usr/bin/env python3
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# services.py - Utility functions for pvcnoded external services
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# Part of the Parallel Virtual Cluster (PVC) system
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#
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# Copyright (C) 2018-2021 Joshua M. Boniface <joshua@boniface.me>
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, version 3.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <https://www.gnu.org/licenses/>.
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#
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###############################################################################
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import daemon_lib.common as common
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from time import sleep
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def start_zookeeper(logger, config):
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if config['daemon_mode'] == 'coordinator':
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logger.out('Starting Zookeeper daemon', state='i')
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# TODO: Move our handling out of Systemd and integrate it directly as a subprocess?
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common.run_os_command('systemctl start zookeeper.service')
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def start_libvirtd(logger, config):
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if config['enable_hypervisor']:
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logger.out('Starting Libvirt daemon', state='i')
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# TODO: Move our handling out of Systemd and integrate it directly as a subprocess?
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common.run_os_command('systemctl start libvirtd.service')
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def start_patroni(logger, config):
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if config['enable_networking'] and config['daemon_mode'] == 'coordinator':
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logger.out('Starting Patroni daemon', state='i')
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# TODO: Move our handling out of Systemd and integrate it directly as a subprocess?
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common.run_os_command('systemctl start patroni.service')
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def start_frrouting(logger, config):
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if config['enable_networking'] and config['daemon_mode'] == 'coordinator':
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logger.out('Starting FRRouting daemon', state='i')
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# TODO: Move our handling out of Systemd and integrate it directly as a subprocess?
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common.run_os_command('systemctl start frr.service')
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def start_ceph_mon(logger, config):
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if config['enable_storage'] and config['daemon_mode'] == 'coordinator':
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logger.out('Starting Ceph Monitor daemon', state='i')
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# TODO: Move our handling out of Systemd and integrate it directly as a subprocess?
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common.run_os_command(f'systemctl start ceph-mon@{config["node_hostname"]}.service')
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def start_ceph_mgr(logger, config):
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if config['enable_storage'] and config['daemon_mode'] == 'coordinator':
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logger.out('Starting Ceph Manager daemon', state='i')
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# TODO: Move our handling out of Systemd and integrate it directly as a subprocess?
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common.run_os_command(f'systemctl start ceph-mgr@{config["node_hostname"]}.service')
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def start_system_services(logger, config):
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start_zookeeper(logger, config)
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start_libvirtd(logger, config)
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start_patroni(logger, config)
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start_frrouting(logger, config)
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start_ceph_mon(logger, config)
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start_ceph_mgr(logger, config)
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logger.out('Waiting 3 seconds for daemons to start', state='s')
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sleep(3)
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