557 lines
20 KiB
Python
557 lines
20 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
|
|
|
|
# Copyright (C) 2012 Yahoo! Inc. All Rights Reserved.
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License"); you may
|
|
# not use this file except in compliance with the License. You may obtain
|
|
# a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
# License for the specific language governing permissions and limitations
|
|
# under the License.
|
|
|
|
import weakref
|
|
|
|
from devstack import cfg_helpers
|
|
from devstack import downloader as down
|
|
from devstack import exceptions as excp
|
|
from devstack import log as logging
|
|
from devstack import pip
|
|
from devstack import settings
|
|
from devstack import shell as sh
|
|
from devstack import trace as tr
|
|
from devstack import utils
|
|
|
|
from devstack.runners import fork
|
|
from devstack.runners import upstart
|
|
from devstack.runners import screen
|
|
|
|
LOG = logging.getLogger("devstack.component")
|
|
|
|
#how we actually setup and unsetup python
|
|
PY_INSTALL = ['python', 'setup.py', 'develop']
|
|
PY_UNINSTALL = ['python', 'setup.py', 'develop', '--uninstall']
|
|
|
|
#runtime status constants (return by runtime status)
|
|
STATUS_UNKNOWN = "unknown"
|
|
STATUS_STARTED = "started"
|
|
STATUS_STOPPED = "stopped"
|
|
|
|
#which run types to which runner class
|
|
RUNNER_CLS_MAPPING = {
|
|
settings.RUN_TYPE_FORK: fork.ForkRunner,
|
|
settings.RUN_TYPE_UPSTART: upstart.UpstartRunner,
|
|
settings.RUN_TYPE_SCREEN: screen.ScreenRunner,
|
|
}
|
|
|
|
#where symlinks will go
|
|
BASE_LINK_DIR = "/etc"
|
|
|
|
|
|
class ComponentBase(object):
|
|
def __init__(self,
|
|
subsystems,
|
|
runner,
|
|
component_dir,
|
|
all_instances,
|
|
name,
|
|
*args,
|
|
**kargs):
|
|
|
|
self.subsystems = subsystems
|
|
self.instances = all_instances
|
|
|
|
# The runner has a reference to us, so use a weakref here to
|
|
# avoid breaking garbage collection.
|
|
self.runner = weakref.proxy(runner)
|
|
|
|
# Parts of the global runner context that we use
|
|
self.cfg = runner.cfg
|
|
self.pw_gen = runner.pw_gen
|
|
self.packager = runner.pkg_manager
|
|
self.distro = runner.distro
|
|
|
|
# What this component is called
|
|
self.component_name = name
|
|
|
|
# Required component directories
|
|
self.component_dir = component_dir
|
|
self.trace_dir = sh.joinpths(self.component_dir,
|
|
settings.COMPONENT_TRACE_DIR)
|
|
self.app_dir = sh.joinpths(self.component_dir,
|
|
settings.COMPONENT_APP_DIR)
|
|
self.cfg_dir = sh.joinpths(self.component_dir,
|
|
settings.COMPONENT_CONFIG_DIR)
|
|
|
|
def verify(self):
|
|
pass
|
|
|
|
def warm_configs(self):
|
|
pass
|
|
|
|
def is_started(self):
|
|
reader = tr.TraceReader(tr.trace_fn(self.trace_dir, tr.START_TRACE))
|
|
return reader.exists()
|
|
|
|
def is_installed(self):
|
|
return tr.TraceReader(tr.trace_fn(self.trace_dir, tr.IN_TRACE)).exists()
|
|
|
|
|
|
class PkgInstallComponent(ComponentBase):
|
|
def __init__(self, *args, **kargs):
|
|
ComponentBase.__init__(self, *args, **kargs)
|
|
self.tracewriter = tr.TraceWriter(tr.trace_fn(self.trace_dir,
|
|
tr.IN_TRACE))
|
|
self.packages = kargs.get('packages', list())
|
|
|
|
def _get_download_locations(self):
|
|
return list()
|
|
|
|
def download(self):
|
|
locations = self._get_download_locations()
|
|
base_dir = self.app_dir
|
|
for location_info in locations:
|
|
uri_tuple = location_info["uri"]
|
|
branch_tuple = location_info.get("branch")
|
|
subdir = location_info.get("subdir")
|
|
target_loc = base_dir
|
|
if subdir:
|
|
target_loc = sh.joinpths(base_dir, subdir)
|
|
branch = None
|
|
if branch_tuple:
|
|
(cfg_section, cfg_key) = branch_tuple
|
|
branch = self.cfg.get(cfg_section, cfg_key)
|
|
if not branch:
|
|
msg = "No branch entry found at config location [%s]" % \
|
|
(cfg_helpers.make_id(cfg_section, cfg_key))
|
|
raise excp.ConfigException(msg)
|
|
(cfg_section, cfg_key) = uri_tuple
|
|
uri = self.cfg.get(cfg_section, cfg_key)
|
|
if not uri:
|
|
msg = "No uri entry found at config location [%s]" % \
|
|
(cfg_helpers.make_id(cfg_section, cfg_key))
|
|
raise excp.ConfigException(msg)
|
|
self.tracewriter.download_happened(target_loc, uri)
|
|
dirs_made = down.download(target_loc, uri, branch)
|
|
#ensure this is always added so that
|
|
#if a keep old happens then this of course
|
|
#won't be recreated, but if u uninstall without keeping old
|
|
#then this won't be deleted this time around
|
|
#adding it in is harmless and willl make sure its removed
|
|
dirs_made.append(target_loc)
|
|
self.tracewriter.dirs_made(*dirs_made)
|
|
return len(locations)
|
|
|
|
def _get_param_map(self, config_fn):
|
|
return dict()
|
|
|
|
def _get_packages(self):
|
|
return self.packages
|
|
|
|
def install(self):
|
|
LOG.debug('Preparing to install packages for %s',
|
|
self.component_name)
|
|
pkgs = self._get_packages()
|
|
if pkgs:
|
|
pkg_names = set([p['name'] for p in pkgs])
|
|
LOG.info("Setting up %s packages (%s)" % (len(pkg_names), ", ".join(pkg_names)))
|
|
for p in pkgs:
|
|
self.tracewriter.package_installed(p)
|
|
self.packager.install(p)
|
|
else:
|
|
LOG.info('No packages to install for %s',
|
|
self.component_name)
|
|
return self.trace_dir
|
|
|
|
def pre_install(self):
|
|
pkgs = self._get_packages()
|
|
if pkgs:
|
|
mp = self._get_param_map(None)
|
|
self.packager.pre_install(pkgs, mp)
|
|
|
|
def post_install(self):
|
|
pkgs = self._get_packages()
|
|
if pkgs:
|
|
mp = self._get_param_map(None)
|
|
self.packager.post_install(pkgs, mp)
|
|
|
|
def _get_config_files(self):
|
|
return list()
|
|
|
|
def _config_adjust(self, contents, config_fn):
|
|
return contents
|
|
|
|
def _get_target_config_name(self, config_fn):
|
|
return sh.joinpths(self.cfg_dir, config_fn)
|
|
|
|
def _get_source_config(self, config_fn):
|
|
return utils.load_template(self.component_name, config_fn)
|
|
|
|
def _get_link_dir(self):
|
|
return sh.joinpths(BASE_LINK_DIR, self.component_name)
|
|
|
|
def _get_symlinks(self):
|
|
links = dict()
|
|
for fn in self._get_config_files():
|
|
source_fn = self._get_target_config_name(fn)
|
|
links[source_fn] = sh.joinpths(self._get_link_dir(), fn)
|
|
return links
|
|
|
|
def _configure_files(self):
|
|
configs = self._get_config_files()
|
|
if configs:
|
|
LOG.info("Configuring %s files", len(configs))
|
|
for fn in configs:
|
|
#get the params and where it should come from and
|
|
#where it should go
|
|
parameters = self._get_param_map(fn)
|
|
tgt_fn = self._get_target_config_name(fn)
|
|
#ensure directory is there (if not created previously)
|
|
self.tracewriter.dirs_made(*sh.mkdirslist(sh.dirname(tgt_fn)))
|
|
#now configure it
|
|
LOG.info("Configuring file %s", fn)
|
|
(source_fn, contents) = self._get_source_config(fn)
|
|
LOG.debug("Replacing parameters in file %s", source_fn)
|
|
LOG.debug("Replacements = %s", parameters)
|
|
contents = utils.param_replace(contents, parameters)
|
|
LOG.debug("Applying side-effects of param replacement for template %s", source_fn)
|
|
contents = self._config_adjust(contents, fn)
|
|
LOG.info("Writing configuration file %s", tgt_fn)
|
|
#this trace is used to remove the files configured
|
|
self.tracewriter.cfg_file_written(sh.write_file(tgt_fn,
|
|
contents))
|
|
return len(configs)
|
|
|
|
def _configure_symlinks(self):
|
|
links = self._get_symlinks()
|
|
link_srcs = sorted(links.keys())
|
|
link_srcs.reverse()
|
|
for source in link_srcs:
|
|
link = links.get(source)
|
|
try:
|
|
LOG.info("Symlinking %s => %s", link, source)
|
|
self.tracewriter.dirs_made(*sh.symlink(source, link))
|
|
self.tracewriter.symlink_made(link)
|
|
except OSError:
|
|
LOG.warn("Symlink %s => %s already exists.", link, source)
|
|
return len(links)
|
|
|
|
def configure(self):
|
|
conf_am = self._configure_files()
|
|
conf_am += self._configure_symlinks()
|
|
return conf_am
|
|
|
|
|
|
class PythonInstallComponent(PkgInstallComponent):
|
|
def __init__(self, *args, **kargs):
|
|
PkgInstallComponent.__init__(self, *args, **kargs)
|
|
self.pips = kargs.get('pips', list())
|
|
|
|
def _get_python_directories(self):
|
|
py_dirs = dict()
|
|
py_dirs[self.component_name] = self.app_dir
|
|
return py_dirs
|
|
|
|
def _get_pips(self):
|
|
return self.pips
|
|
|
|
def _install_pips(self):
|
|
pips = self._get_pips()
|
|
if pips:
|
|
pip_names = set([p['name'] for p in pips])
|
|
LOG.info("Setting up %s pips (%s)", len(pip_names), ", ".join(pip_names))
|
|
for info in pips:
|
|
self.tracewriter.pip_installed(info)
|
|
pip.install(info, self.distro)
|
|
|
|
def _install_python_setups(self):
|
|
pydirs = self._get_python_directories()
|
|
if pydirs:
|
|
LOG.info("Setting up %s python directories (%s)",
|
|
len(pydirs), pydirs)
|
|
for (name, wkdir) in pydirs.items():
|
|
working_dir = wkdir or self.app_dir
|
|
self.tracewriter.dirs_made(*sh.mkdirslist(working_dir))
|
|
self.tracewriter.py_installed(name, working_dir)
|
|
(stdout, stderr) = sh.execute(*PY_INSTALL,
|
|
cwd=working_dir,
|
|
run_as_root=True)
|
|
py_trace_name = "%s-%s" % (tr.PY_TRACE, name)
|
|
py_writer = tr.TraceWriter(tr.trace_fn(self.trace_dir,
|
|
py_trace_name))
|
|
py_writer.trace("CMD", " ".join(PY_INSTALL))
|
|
py_writer.trace("STDOUT", stdout)
|
|
py_writer.trace("STDERR", stderr)
|
|
self.tracewriter.file_touched(py_writer.filename())
|
|
|
|
def _python_install(self):
|
|
self._install_pips()
|
|
self._install_python_setups()
|
|
|
|
def install(self):
|
|
trace_dir = PkgInstallComponent.install(self)
|
|
self._python_install()
|
|
return trace_dir
|
|
|
|
|
|
class PkgUninstallComponent(ComponentBase):
|
|
def __init__(self, *args, **kargs):
|
|
ComponentBase.__init__(self, *args, **kargs)
|
|
self.tracereader = tr.TraceReader(tr.trace_fn(self.trace_dir,
|
|
tr.IN_TRACE))
|
|
self.keep_old = kargs.get('keep_old')
|
|
|
|
def unconfigure(self):
|
|
if not self.keep_old:
|
|
#TODO this may not be the best solution siance we might
|
|
#actually want to remove config files but since most
|
|
#config files can be regenerated this should be fine (some
|
|
#can not though) so this is why we need to keep them
|
|
self._unconfigure_files()
|
|
self._unconfigure_links()
|
|
self._unconfigure_runners()
|
|
|
|
def _unconfigure_runners(self):
|
|
if RUNNER_CLS_MAPPING:
|
|
LOG.info("Unconfiguring %s runners.", len(RUNNER_CLS_MAPPING))
|
|
for (_, cls) in RUNNER_CLS_MAPPING.items():
|
|
instance = cls(self.cfg, self.component_name, self.trace_dir)
|
|
instance.unconfigure()
|
|
|
|
def _unconfigure_links(self):
|
|
symfiles = self.tracereader.symlinks_made()
|
|
if symfiles:
|
|
LOG.info("Removing %s symlink files (%s)",
|
|
len(symfiles), ", ".join(symfiles))
|
|
for fn in symfiles:
|
|
sh.unlink(fn, run_as_root=True)
|
|
|
|
def _unconfigure_files(self):
|
|
cfgfiles = self.tracereader.files_configured()
|
|
if cfgfiles:
|
|
LOG.info("Removing %s configuration files (%s)",
|
|
len(cfgfiles), ", ".join(cfgfiles))
|
|
for fn in cfgfiles:
|
|
sh.unlink(fn, run_as_root=True)
|
|
|
|
def uninstall(self):
|
|
self._uninstall_pkgs()
|
|
self._uninstall_touched_files()
|
|
self._uninstall_dirs()
|
|
|
|
def post_uninstall(self):
|
|
pass
|
|
|
|
def pre_uninstall(self):
|
|
pass
|
|
|
|
def _uninstall_pkgs(self):
|
|
pkgsfull = self.tracereader.packages_installed()
|
|
if pkgsfull:
|
|
LOG.info("Potentially removing %s packages",
|
|
len(pkgsfull))
|
|
which_removed = self.packager.remove_batch(pkgsfull)
|
|
LOG.info("Actually removed %s packages (%s)",
|
|
len(which_removed), ", ".join(which_removed))
|
|
|
|
def _uninstall_touched_files(self):
|
|
filestouched = self.tracereader.files_touched()
|
|
if filestouched:
|
|
LOG.info("Removing %s touched files (%s)",
|
|
len(filestouched), ", ".join(filestouched))
|
|
for fn in filestouched:
|
|
sh.unlink(fn, run_as_root=True)
|
|
|
|
def _uninstall_dirs(self):
|
|
dirsmade = self.tracereader.dirs_made()
|
|
if dirsmade:
|
|
dirsmade = [sh.abspth(d) for d in dirsmade]
|
|
if self.keep_old:
|
|
places = set()
|
|
for (pth_loc, _) in self.tracereader.download_locations():
|
|
places.add(pth_loc)
|
|
LOG.info("Keeping %s download directories [%s]",
|
|
len(places), ",".join(sorted(places)))
|
|
for download_place in places:
|
|
dirsmade = sh.remove_parents(download_place, dirsmade)
|
|
for dirname in dirsmade:
|
|
LOG.info("Removing created directory (%s)", dirname)
|
|
sh.deldir(dirname, run_as_root=True)
|
|
|
|
|
|
class PythonUninstallComponent(PkgUninstallComponent):
|
|
def __init__(self, *args, **kargs):
|
|
PkgUninstallComponent.__init__(self, *args, **kargs)
|
|
|
|
def uninstall(self):
|
|
self._uninstall_python()
|
|
self._uninstall_pips()
|
|
PkgUninstallComponent.uninstall(self)
|
|
|
|
def _uninstall_pips(self):
|
|
pips = self.tracereader.pips_installed()
|
|
if pips:
|
|
names = set([p['name'] for p in pips])
|
|
LOG.info("Uninstalling %s python packages (%s)" % (len(names), ", ".join(names)))
|
|
pip.uninstall_batch(pips, self.distro)
|
|
|
|
def _uninstall_python(self):
|
|
pylisting = self.tracereader.py_listing()
|
|
if pylisting:
|
|
LOG.info("Uninstalling %s python setups.", len(pylisting))
|
|
for (_, where) in pylisting:
|
|
sh.execute(*PY_UNINSTALL, cwd=where, run_as_root=True)
|
|
|
|
|
|
class ProgramRuntime(ComponentBase):
|
|
def __init__(self, *args, **kargs):
|
|
ComponentBase.__init__(self, *args, **kargs)
|
|
self.tracewriter = tr.TraceWriter(tr.trace_fn(self.trace_dir, tr.START_TRACE))
|
|
self.tracereader = tr.TraceReader(tr.trace_fn(self.trace_dir, tr.START_TRACE))
|
|
|
|
def _get_apps_to_start(self):
|
|
return list()
|
|
|
|
def _get_app_options(self, app_name):
|
|
return list()
|
|
|
|
def _get_param_map(self, app_name):
|
|
return {
|
|
'ROOT': self.app_dir,
|
|
}
|
|
|
|
def pre_start(self):
|
|
pass
|
|
|
|
def post_start(self):
|
|
pass
|
|
|
|
def configure(self):
|
|
# First make a pass and make sure all runtime (e.g. upstart)
|
|
# config files are in place....
|
|
cls = RUNNER_CLS_MAPPING[cfg_helpers.fetch_run_type(self.cfg)]
|
|
instance = cls(self.cfg, self.component_name, self.trace_dir)
|
|
tot_am = 0
|
|
for app_info in self._get_apps_to_start():
|
|
app_name = app_info["name"]
|
|
app_pth = app_info.get("path", app_name)
|
|
app_dir = app_info.get("app_dir", self.app_dir)
|
|
# Adjust the program options now that we have real locations
|
|
program_opts = utils.param_replace_list(
|
|
self._get_app_options(app_name),
|
|
self._get_param_map(app_name),
|
|
)
|
|
# Configure it with the given settings
|
|
LOG.info("Configuring runner for program [%s]", app_name)
|
|
cfg_am = instance.configure(app_name,
|
|
(app_pth, app_dir, program_opts))
|
|
LOG.info("Configured %s files for runner for program [%s]",
|
|
cfg_am, app_name)
|
|
tot_am += cfg_am
|
|
return tot_am
|
|
|
|
def start(self):
|
|
# Select how we are going to start it
|
|
cls = RUNNER_CLS_MAPPING[cfg_helpers.fetch_run_type(self.cfg)]
|
|
instance = cls(self.cfg, self.component_name, self.trace_dir)
|
|
am_started = 0
|
|
for app_info in self._get_apps_to_start():
|
|
app_name = app_info["name"]
|
|
app_pth = app_info.get("path", app_name)
|
|
app_dir = app_info.get("app_dir", self.app_dir)
|
|
# Adjust the program options now that we have real locations
|
|
program_opts = utils.param_replace_list(
|
|
self._get_app_options(app_name),
|
|
self._get_param_map(app_name),
|
|
)
|
|
# Start it with the given settings
|
|
LOG.info("Starting [%s] with options [%s]",
|
|
app_name, ", ".join(program_opts))
|
|
info_fn = instance.start(app_name,
|
|
(app_pth, app_dir, program_opts),
|
|
)
|
|
LOG.info("Started [%s] details are in [%s]", app_name, info_fn)
|
|
# This trace is used to locate details about what to stop
|
|
self.tracewriter.started_info(app_name, info_fn)
|
|
am_started += 1
|
|
return am_started
|
|
|
|
def _locate_killers(self):
|
|
start_traces = self.tracereader.apps_started()
|
|
killer_instances = dict()
|
|
to_kill = list()
|
|
for (trace_fn, app_name) in start_traces:
|
|
# Figure out which class will stop it
|
|
killcls = None
|
|
for (cmd, action) in tr.TraceReader(trace_fn).read():
|
|
if cmd == settings.RUN_TYPE_TYPE and action:
|
|
killcls = RUNNER_CLS_MAPPING.get(action)
|
|
break
|
|
|
|
# Did we find a class that can do it?
|
|
if killcls:
|
|
if killcls in killer_instances:
|
|
killer = killer_instances[killcls]
|
|
else:
|
|
killer = killcls(self.cfg,
|
|
self.component_name,
|
|
self.trace_dir,
|
|
)
|
|
killer_instances[killcls] = killer
|
|
to_kill.append((app_name, killer))
|
|
else:
|
|
msg = "Could not figure out which class to use to stop (%s, %s)" % (app_name, trace_fn)
|
|
raise excp.StopException(msg)
|
|
return to_kill
|
|
|
|
def stop(self):
|
|
to_kill = self._locate_killers()
|
|
for (app_name, killer) in to_kill:
|
|
killer.stop(app_name)
|
|
LOG.debug("Deleting start trace file [%s]",
|
|
self.tracereader.filename())
|
|
sh.unlink(self.tracereader.filename())
|
|
return len(to_kill)
|
|
|
|
def status(self):
|
|
return STATUS_UNKNOWN
|
|
|
|
def restart(self):
|
|
return 0
|
|
|
|
|
|
class PythonRuntime(ProgramRuntime):
|
|
def __init__(self, *args, **kargs):
|
|
ProgramRuntime.__init__(self, *args, **kargs)
|
|
|
|
|
|
class EmptyRuntime(ComponentBase):
|
|
def __init__(self, *args, **kargs):
|
|
ComponentBase.__init__(self, *args, **kargs)
|
|
self.tracereader = tr.TraceReader(tr.trace_fn(self.trace_dir, tr.IN_TRACE))
|
|
|
|
def configure(self):
|
|
return 0
|
|
|
|
def pre_start(self):
|
|
pass
|
|
|
|
def post_start(self):
|
|
pass
|
|
|
|
def start(self):
|
|
return 0
|
|
|
|
def stop(self):
|
|
return 0
|
|
|
|
def status(self):
|
|
return STATUS_UNKNOWN
|
|
|
|
def restart(self):
|
|
return 0
|