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Editing: governor.py
# coding=utf-8 # # Copyright © Cloud Linux GmbH & Cloud Linux Software, Inc 2010-2021 All Rights Reserved # # Licensed under CLOUD LINUX LICENSE AGREEMENT # http://cloudlinux.com/docs/LICENCE.TXT # import os from typing import Dict, List # NOQA from clcommon.const import Feature from clcommon.lib.mysql_governor_lib import MySQLGovernor from clcommon.utils import ExternalProgramFailed, run_command from clconfig.db_info_lib import MysqlInfo from cldetectlib import getCPName from clwizard.constants import MODULES_LOGS_DIR from clwizard.exceptions import InstallationFailedException, UserInterventionNeededError from .base import WizardInstaller class GovernorInstaller(WizardInstaller): LOG_FILE = os.path.join(MODULES_LOGS_DIR, 'governor.log') UNKNOWN = 'unknown' UTILITY_PATH = '/usr/share/lve/dbgovernor/mysqlgovernor.py' _REQUIRED_CL_COMPONENT_SUPPORT = Feature.GOVERNOR def __init__(self): super().__init__() # dict( # 'vendor': MySQL|MariaDB|Percona, # 'version': server version in the form of {major}.{minor} # or {major}.{minor}-{release} for percona, # 'cll-lve': patches from CL applied or not (True|False) # ) self.db_info = MysqlInfo().get() def _install_governor_package(self): if not self._is_package_installed('governor-mysql'): try: out = self._install_package('governor-mysql') except ExternalProgramFailed as err: self.app_logger.error("Package installation failed with error: %s", str(err)) raise InstallationFailedException() from err self.app_logger.info("Package was installed successfully: %s", out) else: self.app_logger.info("Skip the governor-mysql installation, it is already installed") def _prepare_db_options(self): if GovernorInstaller.UNKNOWN in (self.db_info["vendor"], self.db_info["version"]): return None try: vendor = self.db_info['vendor'].lower() # split(-)[0] drop release # split[.][0-2] use only major and minor versions version = ''.join(self.db_info['version'].split('-')[0].split('.')[0:2]) return vendor + version except IndexError: return None def _initialize_governor(self): """ Trying to install governor with --wizard key, it detects the DB automatically (on DA and cPanel), for other panels we will have blockers for the governor module. """ try: self.app_logger.info("Install MySQL Governor") # for governor there are errors that could be handled only manually by user # these errors have exit code 3 self._run_cmd_and_check_special_status( [GovernorInstaller.UTILITY_PATH, '--install', '--wizard'], exit_status=3 ) except ExternalProgramFailed as err: raise InstallationFailedException() from err def _run_cmd_and_check_special_status(self, cmd, exit_status): """ There are cases when some commands can't be executed without the user's intervention. Such scripts/commands return a special exit code that must be checked for. """ retcode, out, _ = run_command(cmd, return_full_output=True) if retcode == exit_status: self.app_logger.warning('Can`t install governor automatically') self.app_logger.warning('Reason: %s', out) raise UserInterventionNeededError() if retcode != 0: self.app_logger.error('Error occurred during running "%s"\nReason is: "%s"', cmd, out) raise ExternalProgramFailed(out) def run_installation(self, options): if self.db_info["vendor"] is None: raise InstallationFailedException("Please, install a MySQL server first.") self._install_governor_package() self._initialize_governor() def _get_warnings(self): # type: () -> List """ Get list of warnings that should be shown in wizard before module installation """ warnings = [ { "message": ( "Please create a full database backup (including system tables)." " MySQL/MariaDB/Percona server will be updated from CloudLinux repositories." ) } ] # type: List[Dict] if self.db_info["vendor"] is None: warnings.append( { "message": ( "Could not detect a MySQL server." " For a list of compatible options please see %(url)s." ), "context": { "url": "https://docs.cloudlinux.com/mysql_governor_installation.html" }, } ) return warnings def _get_blockers(self): # type: () -> List """ Get a list of possible blockers to disable Governor module in Wizard UI. """ blockers = [] if getCPName() not in ['cPanel', 'DirectAdmin']: blockers.append( { 'message': 'MySQL Governor can\'t be automatically installed.' ' Please install it through the command-line interface.' ' Learn more here: %(url)s', 'context': { 'url': 'https://docs.cloudlinux.com/installation-wizard.html', }, } ) return blockers def _is_already_configured(self): """ Check if the governor is ready for work. """ mysql_gov = MySQLGovernor() return mysql_gov.is_governor_present() and self.db_info['cll-lve'] def initial_status(self): result = { 'already_configured': self._is_already_configured(), 'db_version': self.db_info['version'], } warnings = self._get_warnings() if warnings: result.update({'warnings': warnings}) blockers = self._get_blockers() if blockers: result.update({'blockers': blockers}) return result
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