def _start(self, create=True):
"""
Start cluster from this cluster template's settings
Handles creating and configuring a cluster
Does not attempt to validate before running
"""
log.info("Starting cluster...")
if create:
self.create_cluster()
s = Spinner()
log.log(INFO_NO_NEWLINE, "Waiting for cluster to start...")
s.start()
while not self.is_cluster_up():
time.sleep(30)
s.stop()
log.info("The master node is %s" % self.master_node.dns_name)
if self.volumes:
self.attach_volumes_to_master()
log.info("Setting up the cluster...")
default_setup = clustersetup.DefaultClusterSetup().run(
self.nodes, self.master_node, self.cluster_user, self.cluster_shell, self.volumes
)
self.create_receipt()
self.run_plugins()
log.info(
user_msgs.cluster_started_msg
% {
"master": self.master_node.dns_name,
"user": self.cluster_user,
"key": self.key_location,
"tag": self.cluster_tag,
}
)
def _request_instance(self, zone):
alias = self._alias_tmpl % zone
if self._instance:
i = self._instance
if i.state not in ['pending', 'running']:
raise exception.InstanceNotRunning(i.id)
if i.placement != zone:
raise exception.ValidationError(
"specified host instance %s is not in zone %s" %
(i.id, zone))
self._instance = Node(i, self._key_location, alias)
else:
self._instance = self._get_existing_instance(zone)
if not self._instance:
self._validate_image_and_type(self._image_id, self._instance_type)
log.info(
"No instance in group %s for zone %s, launching one now." % \
(self.security_group.name, zone))
self._resv = self._ec2.run_instances(
image_id=self._image_id,
instance_type=self._instance_type,
min_count=1, max_count=1,
security_groups=[self.security_group.name],
key_name=self._keypair,
placement=zone,
user_data=alias)
instance = self._resv.instances[0]
self._instance = Node(instance, self._key_location, alias)
s = Spinner()
log.log(INFO_NO_NEWLINE,
"Waiting for instance %s to come up..." % self._instance.id)
s.start()
while not self._instance.is_up():
time.sleep(15)
s.stop()
return self._instance
def create_image(self, size=15):
host = self.host
host_ssh = self.host_ssh
self.clean_private_data()
if self.host.root_device_type == "ebs":
log.info("Creating EBS image...")
imgid = self.ec2.create_image(host.id, self.name,
self.description)
s = Spinner()
log.log(INFO_NO_NEWLINE,
"Waiting for AMI %s to become available..." % imgid)
s.start()
img = self.ec2.get_image(imgid)
while img.update() == "pending":
time.sleep(15)
s.stop()
if img.update() == "failed":
raise exception.AWSError(
"EBS image creation failed for AMI %s" % imgid)
return imgid
log.info("Creating new EBS-backed image from instance-store instance")
log.info("Creating new root volume...")
vol = self.ec2.create_volume(size, host.placement)
log.info("Created new volume: %s" % vol.id)
while vol.update() != 'available':
time.sleep(5)
dev = None
for i in string.ascii_lowercase[::-1]:
dev = '/dev/sd%s' % i
if not dev in host.block_device_mapping:
break
log.info("Attaching volume %s to instance %s on %s" %
(vol.id, host.id, dev))
vol.attach(host.id, dev)
while vol.update() != 'in-use':
time.sleep(5)
while not host_ssh.path_exists(dev):
time.sleep(5)
host_ssh.execute('mkfs.ext3 -F %s' % dev)
mount_point = '/ebs'
while host_ssh.path_exists(mount_point):
mount_point += '1'
host_ssh.mkdir(mount_point)
log.info("Mounting %s on %s" % (dev, mount_point))
host_ssh.execute('mount %s %s' % (dev, mount_point))
log.info("Configuring /etc/fstab")
host_ssh.remove_lines_from_file('/etc/fstab', '/mnt')
fstab = host_ssh.remote_file('/etc/fstab', 'a')
fstab.write('/dev/sdb1 /mnt auto defaults,nobootwait 0 0\n')
fstab.close()
log.info("Syncing root filesystem to new volume (%s)" % vol.id)
host_ssh.execute(
'rsync -avx --exclude %(mpt)s --exclude /root/.ssh / %(mpt)s' % \
{'mpt': mount_point})
log.info("Unmounting %s from %s" % (dev, mount_point))
host_ssh.execute('umount %s' % mount_point)
log.info("Detaching volume %s from %s" % (dev, mount_point))
vol.detach()
while vol.update() != 'available':
time.sleep(5)
snap = self.ec2.create_snapshot(vol,
description=self.snapshot_description,
wait_for_snapshot=True)
log.info("New snapshot created: %s" % snap.id)
bmap = self.ec2.create_root_block_device_map(snap.id,
add_ephemeral_drives=True)
log.info("Registering new image...")
img_id = self.ec2.register_image(name=self.name,
description=self.description,
architecture=host.architecture,
kernel_id=self.kernel_id,
ramdisk_id=self.ramdisk_id,
root_device_name='/dev/sda1',
block_device_map=bmap)
return img_id
