openstack/python-tripleoclient
Code Issues Proposed changes

Mount a tmpfs filesystem for heat tmpfiles

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We noticed that heat was sleeping a lot waiting on disk.  By putting the sqlite
database on a ramdisk (tmpfs) we cut the deploy time in half.

Change-Id: Ic22bf49787279993d5d6ee081b31d789b519e555
This commit is contained in:
Ian Main 2017-09-29 12:15:40 -04:00
parent 8590d9b80e
commit fc7399df70
1 changed files with 39 additions and 1 deletions
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40
tripleoclient/heat_launcher.py
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@ -112,10 +112,48 @@ class HeatBaseLauncher(object):
# and chown them accordingly for the heat user
def __init__(self, api_port, container_image, user='heat'):
self.api_port = api_port
tmpdir = '/var/tmp/undercloud'
if os.path.isdir(tmpdir):
# This one may fail but it's just cleanup.
p = subprocess.Popen(['umount', tmpdir],
stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
cmd_stdout, cmd_stderr = p.communicate()
retval = p.returncode
if retval != 0:
log.info('Cleanup unmount of %s failed (probably because '
'it was not mounted): %s' % (tmpdir, cmd_stderr))
else:
log.info('umount of %s success' % (tmpdir))
else:
# Create the directory if it doesn't exist.
try:
os.makedirs(tmpdir, mode=0o755)
except Exception as e:
log.error('Creating temp directory "%s" failed: %s' %
(tmpdir, e))
raise Exception('Could not create temp directory %s: %s' %
(tmpdir, e))
# As an optimization we mount the tmp directory in a tmpfs (in memory)
# filesystem. Depending on your system this can cut the heat
# deployment times by half.
p = subprocess.Popen(['mount', '-t', 'tmpfs', '-o', 'size=500M',
'tmpfs', tmpdir],
stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
cmd_stdout, cmd_stderr = p.communicate()
retval = p.returncode
if retval != 0:
# It's ok if this fails, it will still work. It just won't
# be on tmpfs.
log.warning('Unable to mount tmpfs for logs and database %s: %s' %
(tmpdir, cmd_stderr))
self.policy_file = os.path.join(os.path.dirname(__file__),
'noauth_policy.json')
self.install_tmp = tempfile.mkdtemp(prefix='undercloud_deploy-')
self.install_tmp = tempfile.mkdtemp(prefix='%s/undercloud_deploy-' %
tmpdir)
self.container_image = container_image
self.user = user
self.sql_db = os.path.join(self.install_tmp, 'heat.sqlite')