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| #!/usr/bin/python |
| # -*- coding: utf-8 -*- |
| # |
| # hosted_engine_page.py - Copyright (C) 2014 Red Hat, Inc. |
| # Written by Joey Boggs <jboggs@redhat.com> |
| # |
| # This program is free software; you can redistribute it and/or modify |
| # it under the terms of the GNU General Public License as published by |
| # the Free Software Foundation; version 2 of the License. |
| # |
| # This program is distributed in the hope that it will be useful, |
| # but WITHOUT ANY WARRANTY; without even the implied warranty of |
| # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| # GNU General Public License for more details. |
| # |
| # You should have received a copy of the GNU General Public License |
| # along with this program; if not, write to the Free Software |
| # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, |
| # MA 02110-1301, USA. A copy of the GNU General Public License is |
| # also available at http://www.gnu.org/copyleft/gpl.html. |
| from urlparse import urlparse |
| from ovirt.node import plugins, ui, utils, valid |
| from ovirt.node.plugins import Changeset |
| from ovirt.node.utils import console |
| from ovirt.node.utils.fs import Config, File |
| from ovirt.node.utils.network import NodeNetwork |
| from ovirt_hosted_engine_ha.client import client |
| from . import config |
| from .hosted_engine_model import HostedEngine |
| import json |
| import os |
| import requests |
| import sys |
| import tempfile |
| import threading |
| import time |
| '' |
| Configure Hosted Engine |
| '' |
| classPlugin(plugins.NodePlugin): |
| _server =None |
| _show_progressbar =False |
| _model = {} |
| _install_ready =False |
| def__init__(self, application): |
| super(Plugin, self).__init__(application) |
| defname(self): |
| return'Hosted Engine' |
| defrank(self): |
| return110 |
| defupdate(self, imagepath): |
| (valid.Empty() | valid.Text())(imagepath) |
| return {'OVIRT_HOSTED_ENGINE_IMAGE_PATH': imagepath} |
| defmodel(self): |
| cfg = HostedEngine().retrieve() |
| conf_status ='Configured'ifself._configured() else'Not configured' |
| vm_status =self.__get_vm_status() |
| vm =None |
| ifself._configured(): |
| vm =self._read_attr_config(config.VM_CONF_PATH, 'fqdn') |
| model = { |
| 'hosted_engine.enabled': str(conf_status), |
| 'hosted_engine.vm': vm, |
| 'hosted_engine.status': vm_status, |
| 'hosted_engine.diskpath': cfg['imagepath'] or'', |
| 'hosted_engine.display_message': '', |
| 'hosted_engine.pxe': cfg['pxe']} |
| self._model.update(model) |
| returnself._model |
| defvalidators(self): |
| return {'hosted_engine.diskpath': valid.Empty() | |
| valid.URL() | valid.FileURL()} |
| defui_content(self): |
| # Update the status on a page refresh |
| self._model['hosted_engine.status'] =self.__get_vm_status() |
| network_up = NodeNetwork().is_configured() |
| ws = [ui.Header('header[0]', 'Hosted Engine Setup')] |
| if network_up: |
| ws.extend([ui.KeywordLabel('hosted_engine.enabled', |
| ('Hosted Engine: '))]) |
| else: |
| ws.extend([ui.Notice('network.notice', 'Networking is not '+ |
| 'configured please configure it before '+ |
| 'setting up hosted engine')]) |
| ifself._configured(): |
| ws.extend([ui.Divider('divider[0]'), |
| ui.KeywordLabel('hosted_engine.vm', |
| ('Engine VM: ')), |
| ui.KeywordLabel('hosted_engine.status', |
| ('Engine Status: ')), |
| ui.Button('button.status', 'Hosted Engine VM status'), |
| ui.Button('button.maintenance', |
| 'Set Hosted Engine maintenance')]) |
| if network_up: |
| ws.extend([ui.Divider('divider.button'), |
| ui.Button('button.dialog', 'Deploy Hosted Engine')]) |
| ifself._show_progressbar: |
| if'progress'inself._model: |
| ws.append(ui.ProgressBar('download.progress', |
| int(self._model['progress']))) |
| else: |
| ws.append(ui.ProgressBar('download.progress', 0)) |
| ws.append(ui.KeywordLabel('download.status', '')) |
| page = ui.Page('page', ws) |
| page.buttons = [] |
| self.widgets.add(page) |
| return page |
| defon_change(self, changes): |
| pass |
| defon_merge(self, effective_changes): |
| defclose_dialog(): |
| ifself._dialog: |
| self._dialog.close() |
| self._dialog =None |
| self._install_ready =False |
| self._invalid_download =False |
| self.temp_cfg_file =False |
| effective_changes = Changeset(effective_changes) |
| changes = Changeset(self.pending_changes(False)) |
| effective_model = Changeset(self.model()) |
| effective_model.update(effective_changes) |
| self.logger.debug('Changes: %s'% changes) |
| self.logger.debug('Effective Model: %s'% effective_model) |
| if'button.dialog'in effective_changes: |
| self._dialog = DeployDialog('Deploy Hosted Engine', self) |
| self.widgets.add(self._dialog) |
| returnself._dialog |
| if'button.status'in effective_changes: |
| try: |
| contents = utils.process.check_output( |
| ['hosted-engine', |
| '--vm-status'], |
| stderr=utils.process.STDOUT |
| ) |
| except utils.process.CalledProcessError: |
| contents ='nFailed to collect hosted engine vm status, ' |
| 'check ovirt-ha-broker logs.' |
| self.application.show(self.ui_content()) |
| return ui.TextViewDialog('output.dialog', 'Hosted Engine VM ' |
| 'Status', contents) |
| if'button.maintenance'in effective_changes: |
| self._dialog = MaintenanceDialog('Hosted Engine Maintenance', self) |
| self.widgets.add(self._dialog) |
| returnself._dialog |
| if'maintenance.confirm'in effective_changes: |
| close_dialog() |
| if'maintenance.level'in effective_changes: |
| level = effective_changes['maintenance.level'] |
| try: |
| utils.process.check_call(['hosted-engine', |
| '--set-maintenance', |
| '--mode=%s'% level]) |
| except: |
| self.logger.exception('Couldn't set maintenance level ' |
| 'to %s'% level, exc_info=True) |
| return ui.InfoDialog('dialog.error', 'An error occurred', |
| 'Couldn't set maintenance level to ' |
| '%s. Check the logs'% level) |
| if'deploy.additional'in effective_changes: |
| close_dialog() |
| defrun_additional(*args): |
| withself.application.ui.suspended(): |
| try: |
| utils.process.call( |
| 'reset; screen hosted-engine --deploy', |
| shell=True) |
| sys.stdout.write('Press <Return> to return to the TUI') |
| console.wait_for_keypress() |
| self.__persist_configs() |
| except: |
| self.logger.exception('hosted-engine failed to ' |
| 'deploy!', exc_info=True) |
| txt = ('Please set a password on the RHEV-M page of a host ' |
| 'which has previously deployed hosted engine before ' |
| 'continuing. This is required to retrieve the setup ' |
| 'answer file') |
| dialog = ui.ConfirmationDialog('dialog.add', |
| 'Prepare remote host', txt) |
| yes_btn, cncl_btn = dialog.buttons |
| yes_btn.label('Proceed') |
| yes_btn.on_activate.connect(run_additional) |
| return dialog |
| if effective_changes.contains_any(['deploy.confirm']): |
| close_dialog() |
| defmake_tempfile(): |
| ifnot os.path.exists(config.HOSTED_ENGINE_SETUP_DIR): |
| os.makedirs(config.HOSTED_ENGINE_SETUP_DIR) |
| ifnot os.path.exists(config.HOSTED_ENGINE_TEMPDIR): |
| os.makedirs(config.HOSTED_ENGINE_TEMPDIR) |
| temp_fd, temp_cfg_file = tempfile.mkstemp() |
| os.close(temp_fd) |
| return temp_cfg_file |
| imagepath = effective_model['hosted_engine.diskpath'] |
| pxe = effective_model['hosted_engine.pxe'] |
| localpath =None |
| #FIXME: dynamically enable the fields so we can't get into |
| # this kind of situation. Selection should be ui.Options, not |
| # a checkbox and a blank entry field |
| # |
| # Check whether we have unclear conditions |
| ifnot imagepath andnot pxe: |
| self._model['display_message'] ='nnYou must enter a URL' |
| ' or choose PXE to install the Engine VM' |
| returnself.show_dialog() |
| elif imagepath and pxe: |
| self._model['display_message'] ='nnPlease choose either ' |
| 'PXE or an image to ' |
| 'retrieve, not both' |
| returnself.show_dialog() |
| self.temp_cfg_file = make_tempfile() |
| engine_keys = ['hosted_engine.diskpath', 'hosted_engine.pxe'] |
| txs = utils.Transaction('Setting up hosted engine') |
| #FIXME: The 'None' is for force_enable |
| # Why are we setting force_enable? It clutters the code. We should |
| # move force enabling it to checking for --dry instead |
| model = HostedEngine() |
| args =tuple(effective_model.values_for(engine_keys)) + (None,) |
| model.update(*args) |
| if'file://'in imagepath: |
| localpath = imagepath[7:] |
| elif imagepath: |
| localpath = os.path.join(config.HOSTED_ENGINE_SETUP_DIR, |
| os.path.basename(imagepath)) |
| # Check whether we have enough conditions to run it right now |
| if pxe or os.path.exists(localpath): |
| defconsole_wait(event): |
| event.wait() |
| self._install_ready =True |
| self.show_dialog() |
| txs += model.transaction(self.temp_cfg_file) |
| progress_dialog = ui.TransactionProgressDialog('dialog.txs', |
| txs, self) |
| t = threading.Thread(target=console_wait, |
| args=(progress_dialog.event,)) |
| t.start() |
| progress_dialog.run() |
| # The application doesn't wait until the progressdialog is |
| # done, and it ends up being called asynchronously. Calling |
| # in a thread and waiting to set threading.Event |
| # time.sleep(5) |
| # Otherwise start an async download |
| else: |
| path_parsed = urlparse(imagepath) |
| ifnot path_parsed.scheme: |
| self._model['display_message'] = ('nCouldn't parse ' |
| 'URL. please check ' |
| 'it manually.') |
| elif path_parsed.scheme 'http'or |
| path_parsed.scheme 'https': |
| self._show_progressbar =True |
| self.application.show(self.ui_content()) |
| self._image_retrieve(imagepath, |
| config.HOSTED_ENGINE_SETUP_DIR) |
| returnself.ui_content() |
| defshow_dialog(self): |
| defopen_console(): |
| ifself.temp_cfg_file and os.path.isfile(self.temp_cfg_file): |
| try: |
| utils.process.call('reset; screen '+ |
| 'ovirt-node-hosted-engine-setup'+ |
| ' --config-append=%s'% |
| self.temp_cfg_file, shell=True) |
| self.__persist_configs() |
| except: |
| self.logger.exception('hosted-engine failed to deploy!', |
| exc_info=True) |
| else: |
| self.logger.error('Cannot trigger ovirt-hosted-engine-setup'+ |
| ' because the configuration file was not '+ |
| 'generated, please check the location '+ |
| 'referenced in /var/log/ovirt-node.log') |
| self.application.show(self.ui_content()) |
| defreturn_ok(dialog, changes): |
| self.application.ui.close_dialog('Begin Hosted Engine Setup') |
| withself.application.ui.suspended(): |
| open_console() |
| ifself.application.current_plugin() isself: |
| try: |
| # if show_progressbar is not set, the download process has |
| # never started (PXE) or it finished |
| ifself._show_progressbar: |
| # Clear out the counters once we're done, and hide the |
| # progress bar |
| self.widgets['download.progress'].current(0) |
| self.widgets['download.status'].text('') |
| self._show_progressbar =False |
| self._model['download.progress'] =0 |
| self._model['download.status'] ='' |
| # if the temp config file is empty, we removed it in the model |
| # because there was an exception, so don't do anything |
| ifself.temp_cfg_file andnot os.path.isfile( |
| self.temp_cfg_file): |
| self.logger.debug('The temporary config file %s does not' |
| 'exist. Not running screen') |
| return |
| ifself._install_ready: |
| utils.console.writeln('Beginning Hosted Engine Setup ..') |
| txt ='Setup will be ran with screen enabled that can be ' |
| txt +='reconnected in the event of a timeout or ' |
| txt +='connection failure.n' |
| txt +='nIt can be reconnected by running 'screen -d -r'' |
| dialog = ui.ConfirmationDialog('dialog.shell', |
| 'Begin Hosted Engine Setup', |
| txt |
| ) |
| dialog.buttons[0].on_activate.clear() |
| dialog.buttons[0].on_activate.connect(ui.CloseAction()) |
| dialog.buttons[0].on_activate.connect(return_ok) |
| self.application.show(dialog) |
| else: |
| ifself._model['display_message']: |
| msg =self._model['display_message'] |
| self._model['display_message'] ='' |
| else: |
| msg ='nnError Downloading ISO/OVA Image!' |
| dialog = ui.InfoDialog('dialog.notice', |
| 'Hosted Engine Setup', |
| msg) |
| self.application.show(dialog) |
| except: |
| # Error when the UI is not running |
| self.logger.info('Exception on TUI!', exc_info=True) |
| open_console() |
| self.application.show(self.ui_content()) |
| def_read_attr_config(self, config_file, attr): |
| '' |
| Read Attribute value from a config file |
| config_file -- A .conf file |
| attr -- The attribute for reading the value assigned |
| Returns |
| The value for attribute or None (No attribute found) |
| '' |
| value =None |
| f = File(config_file) |
| if attr in f.read(): |
| value = [line.strip().split('=')[1] for line in f |
| if attr in line][0] |
| return value |
| def_configured(self): |
| '' |
| Check if Hosted Engine is configured checking if |
| hosted-engine.conf exists and contains vm_disk_id |
| with a value. |
| Return True or False |
| '' |
| returnbool(os.path.exists(config.VM_CONF_PATH) and |
| self._read_attr_config(config.VM_CONF_PATH, 'vm_disk_id')) |
| def__persist_configs(self): |
| dirs = ['/etc/ovirt-hosted-engine', '/etc/ovirt-hosted-engine-ha', |
| '/etc/ovirt-hosted-engine-setup.env.d'] |
| [Config().persist(d) for d in dirs] |
| def_image_retrieve(self, imagepath, setup_dir): |
| _downloader = DownloadThread(self, imagepath, setup_dir) |
| _downloader.start() |
| def__get_ha_status(self): |
| defdict_from_string(string): |
| return json.loads(string) |
| host =None |
| ha_cli = client.HAClient() |
| try: |
| vm_status = ha_cli.get_all_host_stats() |
| except: |
| vm_status ='Cannot connect to HA daemon, please check the logs' |
| return vm_status |
| else: |
| for v in vm_status.values(): |
| if dict_from_string(v['engine-status'])['health'] 'good': |
| host ='Here'if v['host-id'] |
| ha_cli.get_local_host_id() else v['hostname'] |
| host = v['hostname'] |
| ifnot host: |
| vm_status ='Engine is down or not deployed.' |
| else: |
| vm_status ='Engine is running on {host}'.format(host=host) |
| return vm_status |
| def__get_vm_status(self): |
| ifself._configured(): |
| returnself.__get_ha_status() |
| else: |
| return'Hosted engine not configured' |
| classDeployDialog(ui.Dialog): |
| ''A dialog to input deployment information |
| '' |
| def__init__(self, title, plugin): |
| self.keys = ['hosted_engine.diskpath', 'hosted_engine.pxe'] |
| defclear_invalid(dialog, changes): |
| [plugin.stash_change(prefix) for prefix inself.keys] |
| entries = [ui.Entry('hosted_engine.diskpath', |
| 'Engine ISO/OVA URL for download:'), |
| ui.Checkbox('hosted_engine.pxe', 'PXE Boot Engine VM'), |
| ui.Divider('divider[1]'), |
| ui.SaveButton('deploy.additional', |
| 'Add this host to an existing group')] |
| children = [ui.Label('label[0]', 'Please provide details for ' |
| 'deployment of hosted engine'), |
| ui.Divider('divider[0]')] |
| children.extend(entries) |
| super(DeployDialog, self).__init__('deploy.dialog', title, children) |
| self.buttons = [ui.SaveButton('deploy.confirm', 'Deploy'), |
| ui.CloseButton('deploy.close', 'Cancel')] |
| b = plugins.UIElements(self.buttons) |
| b['deploy.close'].on_activate.clear() |
| b['deploy.close'].on_activate.connect(ui.CloseAction()) |
| b['deploy.close'].on_activate.connect(clear_invalid) |
| classMaintenanceDialog(ui.Dialog): |
| ''A dialog to set HE maintenance level |
| '' |
| states = [('global', 'Global'), |
| ('local', 'Local'), |
| ('none', 'None')] |
| def__init__(self, title, plugin): |
| self.keys = ['maintenance.level'] |
| self.plugin = plugin |
| defclear_invalid(dialog, changes): |
| [plugin.stash_change(prefix) for prefix inself.keys] |
| entries = [ui.Options('maintenance.level', 'Maintenance Level', |
| self.states, selected=self.__vm_status())] |
| children = [ui.Divider('divider.options'), |
| ui.Label('label[0]', 'Please select the maintenance ' |
| 'level'), |
| ui.Divider('divider[0]')] |
| children.extend(entries) |
| super(MaintenanceDialog, self).__init__( |
| 'maintenance.dialog', title, children) |
| self.buttons = [ui.SaveButton('maintenance.confirm', 'Set'), |
| ui.CloseButton('maintenance.close', 'Cancel')] |
| b = plugins.UIElements(self.buttons) |
| b['maintenance.close'].on_activate.clear() |
| b['maintenance.close'].on_activate.connect(ui.CloseAction()) |
| b['maintenance.close'].on_activate.connect(clear_invalid) |
| def__vm_status(self): |
| ha_cli = client.HAClient() |
| level =None |
| try: |
| level ='global'if ha_cli.get_all_stats( |
| client.HAClient.StatModes.GLOBAL)[0]['maintenance'] elseNone |
| exceptKeyError: |
| # Stats returned but no global section |
| pass |
| if level isNone: |
| try: |
| level ='local'if ha_cli.get_all_stats()[1]['maintenance'] |
| else'none' |
| except: |
| self.plugin.logger.debug('Couldn't get HA stats!', |
| exc_info=True) |
| return level |
| classDownloadThread(threading.Thread): |
| ui_thread =None |
| def__init__(self, plugin, url, setup_dir): |
| super(DownloadThread, self).__init__() |
| self.he_plugin = plugin |
| self.url = url |
| self.setup_dir = setup_dir |
| @property |
| deflogger(self): |
| returnself.he_plugin.logger |
| defrun(self): |
| try: |
| self.app =self.he_plugin.application |
| self.ui_thread =self.app.ui.thread_connection() |
| self.__run() |
| exceptExceptionas e: |
| self.logger.exception('Downloader thread failed: %s'% e) |
| def__run(self): |
| # Wait a second before the UI refresh so we get the right widgets |
| time.sleep(.5) |
| path ='%s/%s'% (self.setup_dir, self.url.split('/')[-1]) |
| ui_is_alive =lambda: any((t.name 'MainThread') and t.is_alive() for |
| t in threading.enumerate()) |
| withopen(path, 'wb') as f: |
| started = time.time() |
| try: |
| s = requests.Session() |
| # Don't let apache transparently deflate gzips |
| del s.headers['Accept-Encoding'] |
| r = s.get(self.url, stream=True) |
| if r.status_code !=200: |
| self.he_plugin._model['display_message'] = |
| 'nnCannot download the file: HTTP error code %s'% |
| str(r.status_code) |
| os.unlink(path) |
| returnself.he_plugin.show_dialog() |
| size = r.headers.get('content-length') |
| # Size isn't specified if it's chunked |
| encoding = r.headers.get('transfer-encoding') ifnot size |
| elseNone |
| except requests.exceptions.ConnectionError as e: |
| self.logger.info('Error downloading: %s'% e[0], exc_info=True) |
| self.he_plugin._model['display_message'] = |
| 'nnConnection Error: %s!'%str(e[0]) |
| os.unlink(path) |
| returnself.he_plugin.show_dialog() |
| downloaded =0 |
| defupdate_ui(): |
| # Get new handles every time, since switching pages means |
| # the widgets will get rebuilt and we need new handles to |
| # update |
| progressbar =self.he_plugin.widgets['download.progress'] |
| status =self.he_plugin.widgets['download.status'] |
| if encoding 'chunked': |
| current =0 |
| elif size: |
| current =int(100.0* (float(downloaded) /float(size))) |
| progressbar.current(current) |
| speed = calculate_speed() |
| status.text(speed) |
| # Save it in the model so the page can update immediately |
| # on switching back instead of waiting for a tick |
| self.he_plugin._model.update({'download.status': speed}) |
| self.he_plugin._model.update({'download.progressbar': current}) |
| defcalculate_speed(): |
| raw = downloaded // (time.time() - started) |
| i =0 |
| friendly_names = ('B', 'KB', 'MB', 'GB') |
| ifint(raw /1024) >0: |
| raw = raw /1024 |
| i +=1 |
| return'%0.2f%s/s'% (raw, friendly_names[i]) |
| chunk =None |
| while chunk !='': |
| chunk = r.raw.read(1024*256) |
| downloaded +=len(chunk) |
| f.write(chunk) |
| if ui_is_alive(): |
| self.ui_thread.call(update_ui()) |
| else: |
| break |
| ifnot ui_is_alive(): |
| # If they've exited, clear out the file |
| os.unlink(path) |
| else: |
| self.he_plugin.on_merge({'hosted_engine.diskpath': self.url, |
| 'deploy.confirm': True}) |
| self.he_plugin._install_ready =True |
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