def __init__(self, num_users=None, usernames=None, download_keys=None,
download_keys_dir=None):
if usernames:
usernames = [user.strip() for user in usernames.split(',')]
if num_users:
try:
num_users = int(num_users)
except ValueError:
raise exception.BaseException("num_users must be an integer")
elif usernames:
num_users = len(usernames)
else:
raise exception.BaseException(
"you must provide num_users or usernames or both")
if usernames and num_users and len(usernames) != num_users:
raise exception.BaseException(
"only %d usernames provided - %d required" %
(len(usernames), num_users))
self._num_users = num_users
if not usernames:
usernames = ['user%.3d' % i for i in range(1, num_users + 1)]
self._usernames = usernames
self._download_keys = str(download_keys).lower() == "true"
self._download_keys_dir = download_keys_dir or self.DOWNLOAD_KEYS_DIR
super(CreateUsers, self).__init__()
def execute(self, args):
if not args:
cls = [
c.cluster_tag for c in self.cm.get_clusters(load_plugins=False,
load_receipt=False)
]
msg = "please specify a cluster"
if cls:
opts = ', '.join(cls)
msg = " ".join([msg, '(options:', opts, ')'])
self.parser.error(msg)
for cluster_name in args:
try:
cl = self.cm.get_cluster(cluster_name)
except exception.ClusterDoesNotExist:
raise
except Exception, e:
log.debug("Failed to load cluster settings!", exc_info=True)
log.error("Failed to load cluster settings!")
if self.opts.force:
log.warn("Ignoring cluster settings due to --force option")
cl = self.cm.get_cluster(cluster_name,
load_receipt=False,
require_keys=False)
else:
if not isinstance(e, exception.IncompatibleCluster):
log.error("Use -f to forcefully stop the cluster")
raise
is_stoppable = cl.is_stoppable()
if not is_stoppable:
has_stoppable_nodes = cl.has_stoppable_nodes()
if not self.opts.terminate_unstoppable and has_stoppable_nodes:
raise exception.BaseException(
"Cluster '%s' contains 'stoppable' and 'unstoppable' "
"nodes. Your options are:\n\n"
"1. Use the --terminate-unstoppable option to "
"stop all 'stoppable' nodes and terminate all "
"'unstoppable' nodes\n\n"
"2. Use the 'terminate' command to destroy the "
"cluster.\n\nPass --help for more info." %
cluster_name)
if not has_stoppable_nodes:
raise exception.BaseException(
"Cluster '%s' does not contain any 'stoppable' nodes "
"and can only be terminated. Please use the "
"'terminate' command instead to destroy the cluster."
"\n\nPass --help for more info" % cluster_name)
if not self.opts.confirm:
resp = raw_input("Stop cluster %s (y/n)? " % cluster_name)
if resp not in ['y', 'Y', 'yes']:
log.info("Aborting...")
continue
cl.stop_cluster(self.opts.terminate_unstoppable,
force=self.opts.force)
log.warn("All non-spot, EBS-backed nodes are now in a "
"'stopped' state")
log.warn("You can restart this cluster by passing -x "
"to the 'start' command")
log.warn("Use the 'terminate' command to *completely* "
"terminate this cluster")
def _mkdir(self, directory, makedirs=False):
if not os.path.isdir(directory):
if os.path.isfile(directory):
raise exception.BaseException("'%s' is a file not a directory")
try:
if makedirs:
os.makedirs(directory)
log.info("Created directories %s" % directory)
else:
os.mkdir(directory)
log.info("Created single directory %s" % directory)
except IOError, e:
raise exception.BaseException(str(e))
def get(self, remotepaths, localpath=''):
"""
Copies one or more files from the remote host to the local host.
"""
remotepaths = self._make_list(remotepaths)
localpath = localpath or os.getcwd()
globs = []
noglobs = []
for rpath in remotepaths:
if glob.has_magic(rpath):
globs.append(rpath)
else:
noglobs.append(rpath)
globresults = [self.glob(g) for g in globs]
remotepaths = noglobs
for globresult in globresults:
remotepaths.extend(globresult)
recursive = False
for rpath in remotepaths:
if not self.path_exists(rpath):
raise exception.BaseException(
"Remote file or directory does not exist: %s" % rpath)
for rpath in remotepaths:
if self.isdir(rpath):
recursive = True
break
try:
self.scp.get(remotepaths, local_path=localpath,
recursive=recursive)
except Exception, e:
log.debug("get failed: remotepaths=%s, localpath=%s",
str(remotepaths), localpath)
raise exception.SCPException(str(e))
def _validate_dir(self, dirname, msg_prefix=""):
if not os.path.isdir(dirname):
msg = "'%s' is not a directory"
if not os.path.exists(dirname):
msg = "'%s' does not exist"
if msg_prefix:
msg = ' '.join([msg_prefix, msg])
msg = msg % dirname
raise exception.BaseException(msg)
def execute(self, args):
if len(args) < 3:
self.parser.error("please specify a cluster, local files or " +
"directories, and a remote destination path")
ctag = args[0]
rpath = args[-1]
lpaths = args[1:-1]
for lpath in lpaths:
if not os.path.exists(lpath):
raise exception.BaseException(
"Local file or directory does not exist: %s" % lpath)
cl = self.cm.get_cluster(ctag, load_receipt=False)
node = cl.get_node(self.opts.node)
if self.opts.user:
node.ssh.switch_user(self.opts.user)
if len(lpaths) > 1 and not node.ssh.isdir(rpath):
raise exception.BaseException("Remote path does not exist: %s" %
rpath)
node.ssh.put(lpaths, rpath)
def write_stats_to_csv(self, filename):
"""
Write important SGE stats to CSV file
Appends one line to the CSV
"""
bits = self.get_all_stats()
try:
f = open(filename, 'a')
flat = ','.join(str(n) for n in bits) + '\n'
f.write(flat)
f.close()
except IOError, e:
raise exception.BaseException(str(e))
def visualizer(self):
if not self._visualizer:
try:
from tethyscluster.balancers.sge import visualizer
except ImportError, e:
log.error("Error importing visualizer:")
log.error(str(e))
log.error("check that matplotlib and numpy are installed and:")
log.error(" $ python -c 'import matplotlib'")
log.error(" $ python -c 'import numpy'")
log.error("completes without error")
raise exception.BaseException(
"Failed to load stats visualizer")
self._visualizer = visualizer.SGEVisualizer(self.stats_file,
self.plot_output_dir)
def execute(self, args):
if len(args) < 3:
self.parser.error("please specify a cluster, remote file or " +
"directory, and a local destination path")
ctag = args[0]
lpath = args[-1]
rpaths = args[1:-1]
cl = self.cm.get_cluster(ctag, load_receipt=False)
node = cl.get_node(self.opts.node)
if self.opts.user:
node.ssh.switch_user(self.opts.user)
for rpath in rpaths:
if not glob.has_magic(rpath) and not node.ssh.path_exists(rpath):
raise exception.BaseException(
"Remote file or directory does not exist: %s" % rpath)
node.ssh.get(rpaths, lpath)
def slots_per_host(self):
"""
Returns the number of slots per host. If for some reason the cluster is
inconsistent, this will return -1 for example, if you have m1.large and
m1.small in the same cluster
"""
total = self.count_total_slots()
if total == 0:
return total
single = 0
for q in self.queues:
if q.startswith('all.q@'):
single = self.queues.get(q).get('slots')
break
if (total != (single * len(self.hosts))):
raise exception.BaseException(
"ERROR: Number of slots not consistent across cluster")
return single
def get_stats(self):
"""
This method will ssh to the SGE master and get load & queue stats. It
will feed these stats to SGEStats, which parses the XML. It will return
two arrays: one of hosts, each host has a hash with its host
information inside. The job array contains a hash for every job,
containing statistics about the job name, priority, etc.
"""
log.debug("starting get_stats")
retries = 5
for i in range(retries):
try:
return self._get_stats()
except Exception:
log.warn("Failed to retrieve stats (%d/%d):" %
(i + 1, retries), exc_info=True)
log.warn("Retrying in %ds" % self.polling_interval)
time.sleep(self.polling_interval)
raise exception.BaseException(
"Failed to retrieve SGE stats after trying %d times, exiting..." %
retries)
def _setup_cluster_user(self, user=None):
"""
Create cluster user on all TethysCluster nodes
This command takes care to examine existing folders in /home
and set the new cluster_user's uid/gid accordingly. This is necessary
for the case of EBS volumes containing /home with large amounts of data
in them. It's much less expensive in this case to set the uid/gid of
the new user to be the existing uid/gid of the dir in EBS rather than
chowning potentially terabytes of data.
"""
user = user or self._user
uid, gid = self._get_new_user_id(user)
if uid == 0 or gid == 0:
raise exception.BaseException(
"Cannot create user: {0:s} (uid: {1:1d}, gid: {2:1d}). This "
"is caused by /home/{0:s} directory being owned by root. To "
"fix this you'll need to create a new AMI. Note that the "
"instance is still up.".format(user, uid, gid))
log.info("Creating cluster user: %s (uid: %d, gid: %d)" %
(user, uid, gid))
self._add_user_to_nodes(uid, gid, self._nodes)
def run(self, cluster):
"""
This function will loop indefinitely, using SGELoadBalancer.get_stats()
to get the clusters status. It looks at the job queue and tries to
decide whether to add or remove a node. It should later look at job
durations (currently doesn't)
"""
self._cluster = cluster
if self.max_nodes is None:
self.max_nodes = cluster.cluster_size
if self.min_nodes is None:
self.min_nodes = 1
if self.kill_cluster:
self.min_nodes = 0
if self.min_nodes > self.max_nodes:
raise exception.BaseException(
"min_nodes cannot be greater than max_nodes")
use_default_stats_file = self.dump_stats and not self.stats_file
use_default_plots_dir = self.plot_stats and not self.plot_output_dir
if use_default_stats_file or use_default_plots_dir:
self._mkdir(DEFAULT_STATS_DIR % cluster.cluster_tag, makedirs=True)
if not self.stats_file:
self.stats_file = DEFAULT_STATS_FILE % cluster.cluster_tag
if not self.plot_output_dir:
self.plot_output_dir = DEFAULT_STATS_DIR % cluster.cluster_tag
if not cluster.is_cluster_up():
raise exception.ClusterNotRunning(cluster.cluster_tag)
if self.dump_stats:
if os.path.isdir(self.stats_file):
raise exception.BaseException("stats file destination '%s' is"
" a directory" % self.stats_file)
sfdir = os.path.dirname(os.path.abspath(self.stats_file))
self._validate_dir(sfdir, msg_prefix="stats file destination")
if self.plot_stats:
if os.path.isfile(self.plot_output_dir):
raise exception.BaseException("plot output destination '%s' "
"is a file" %
self.plot_output_dir)
self._validate_dir(self.plot_output_dir,
msg_prefix="plot output destination")
raw = dict(__raw__=True)
log.info("Starting load balancer (Use ctrl-c to exit)")
log.info("Maximum cluster size: %d" % self.max_nodes,
extra=raw)
log.info("Minimum cluster size: %d" % self.min_nodes,
extra=raw)
log.info("Cluster growth rate: %d nodes/iteration\n" %
self.add_nodes_per_iteration, extra=raw)
if self.dump_stats:
log.info("Writing stats to file: %s" % self.stats_file)
if self.plot_stats:
log.info("Plotting stats to directory: %s" % self.plot_output_dir)
while(self._keep_polling):
if not cluster.is_cluster_up():
log.info("Waiting for all nodes to come up...")
time.sleep(self.polling_interval)
continue
self.get_stats()
log.info("Execution hosts: %d" % len(self.stat.hosts), extra=raw)
log.info("Queued jobs: %d" % len(self.stat.get_queued_jobs()),
extra=raw)
oldest_queued_job_age = self.stat.oldest_queued_job_age()
if oldest_queued_job_age:
log.info("Oldest queued job: %s" % oldest_queued_job_age,
extra=raw)
log.info("Avg job duration: %d secs" %
self.stat.avg_job_duration(), extra=raw)
log.info("Avg job wait time: %d secs" % self.stat.avg_wait_time(),
extra=raw)
log.info("Last cluster modification time: %s" %
self.__last_cluster_mod_time.strftime("%Y-%m-%d %X%z"),
extra=dict(__raw__=True))
# evaluate if nodes need to be added
self._eval_add_node()
# evaluate if nodes need to be removed
self._eval_remove_node()
if self.dump_stats or self.plot_stats:
self.stat.write_stats_to_csv(self.stats_file)
# call the visualizer
if self.plot_stats:
try:
self.visualizer.graph_all()
except IOError, e:
raise exception.BaseException(str(e))
# evaluate if cluster should be terminated
if self.kill_cluster:
if self._eval_terminate_cluster():
log.info("Terminating cluster and exiting...")
return self._cluster.terminate_cluster()
log.info("Sleeping...(looping again in %d secs)\n" %
self.polling_interval)
time.sleep(self.polling_interval)
