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import os, sys, string
import subprocess
num_replica = 2
num_stripe = 4
#Cachesize calculator
cache_size = "`grep 'MemTotal' /proc/meminfo | awk '{print $2 * 0.2 / 1024}' | cut -f1 -d.`"
class CreateVolfile:
def __init__ (self, server_dict, server, transport,
transports, options, server_array):
self.host_dict = server_dict
self.host = server
self.volume_name = options.volume_name
self.transport = transport
self.transports = transports
self.gfs_port = options.port
self.gfs_ib_port = options.port + 1
self.auth_parameters = options.auth_param
self.raid_type = options.raid_type
self.ib_devport = options.ib_dev
self.num_servers = len (self.host_dict.keys())
self.conf_dir = options.conf_dir
self.host_array = server_array
self.unused = options.unused
self.debug = options.debug
def create_mount_volfile (self):
raid_type = self.raid_type
if self.conf_dir:
mount_fd = file ("%s/%s-%s.vol" % (self.conf_dir,
str(self.volume_name),
str(self.transport)), "w")
else:
mount_fd = file ("%s-%s.vol" % (str(self.volume_name),
str(self.transport)), "w")
print "Generating client volfiles.. for transport '%s'" % (self.transport)
cmdline = string.join (sys.argv, ' ')
mount_fd.write ("## file auto generated by %s (mount.vol)\n" %
sys.argv[0])
mount_fd.write ("# Cmd line:\n")
mount_fd.write ("# $ %s\n\n" % cmdline)
if raid_type is not None:
# Used for later usage
mount_fd.write ("# RAID %d\n" % raid_type)
mount_fd.write ("# TRANSPORT-TYPE %s\n" % self.transport)
subvolumes = []
for host in self.host_dict.keys():
i = 1
for exports in self.host_dict[host]:
mount_fd.write ("volume %s-%s\n" % (host,i))
mount_fd.write (" type protocol/client\n")
mount_fd.write (" option transport-type %s\n" %
self.transport)
mount_fd.write (" option remote-host %s\n" % host)
if self.transport == 'ib-verbs':
mount_fd.write (" option transport.ib-verbs.port %d\n" %
self.ib_devport)
mount_fd.write (" option transport.remote-port %d\n" %
self.gfs_ib_port)
if self.transport == 'tcp':
mount_fd.write (" option transport.socket.nodelay on\n")
mount_fd.write (" option transport.remote-port %d\n" %
self.gfs_port)
mount_fd.write (" option remote-subvolume brick%s\n" %
i)
mount_fd.write ("end-volume\n\n")
i += 1
exportlist = {}
for entry in self.host_array:
node = entry.split(':')[0]
if not exportlist.has_key(node):
exportlist[node] = 1
else:
exportlist[node] += 1
subvolumes.append(str(node) + '-' + str(exportlist[node]))
# Stripe section.. if given
if raid_type is 0:
max_stripe_idx = len (subvolumes) / num_stripe
stripe_idx = 0
index = 0
while index < max_stripe_idx:
mount_fd.write ("volume stripe-%d\n" % index)
mount_fd.write (" type cluster/stripe\n")
if self.unused:
mount_fd.write ("# option block-size 128k\n")
mount_fd.write ("# option use-xattr no\n")
mount_fd.write (" subvolumes %s %s %s %s\n" %
(subvolumes[stripe_idx],
subvolumes[stripe_idx+1],
subvolumes[stripe_idx+2],
subvolumes[stripe_idx+3]))
mount_fd.write ("end-volume\n\n")
stripe_idx += 4
index +=1
# Replicate section
if raid_type is 1:
max_mirror_idx = len (subvolumes) / num_replica
mirror_idx = 0
index = 0
while index < max_mirror_idx:
mount_fd.write ("volume mirror-%d\n" % index)
mount_fd.write (" type cluster/replicate\n")
mount_fd.write (" subvolumes %s %s\n" %
(subvolumes[mirror_idx],
subvolumes[mirror_idx+1]))
mount_fd.write ("end-volume\n\n")
mirror_idx += 2
index += 1
# Distribute section
if raid_type is 0:
subvolumes = []
flag = 0
while flag < index:
subvolumes.append ("stripe-%d" % flag)
flag += 1
if raid_type is 1:
subvolumes = []
flag = 0
while flag < index:
subvolumes.append ("mirror-%d" % flag)
flag += 1
if len (subvolumes) > 1:
mount_fd.write ("volume distribute\n")
mount_fd.write (" type cluster/distribute\n")
if self.unused:
mount_fd.write("# option unhashed-sticky-bit yes # Used for migrating data while adding new nodes\n")
mount_fd.write("# option min-free-disk 5% # Minimum free disk available on the volume\n")
mount_fd.write (" subvolumes %s\n" %
string.join (subvolumes,' '))
mount_fd.write ("end-volume\n\n")
subvolumes[0] = "distribute"
mount_fd.write ("volume writebehind\n")
mount_fd.write (" type performance/write-behind\n")
mount_fd.write (" option cache-size 4MB\n")
if self.unused:
mount_fd.write ("# option enable-trickling-writes yes # Flush final write calls when network is free\n")
mount_fd.write ("# option enable-O_SYNC yes # Enable O_SYNC for write-behind\n")
mount_fd.write ("# option disable-for-first-nbytes 1 # Disable first nbytes with very small initial writes\n")
mount_fd.write (" subvolumes %s\n" % subvolumes[0])
mount_fd.write ("end-volume\n\n")
mount_fd.write ("volume readahead\n")
mount_fd.write (" type performance/read-ahead\n")
mount_fd.write (" option page-count 4\n")
if self.unused:
mount_fd.write ("# option force-atime-update yes # force updating atimes, default off\n")
mount_fd.write (" subvolumes writebehind\n")
mount_fd.write ("end-volume\n\n")
mount_fd.write ("volume iocache\n")
mount_fd.write (" type performance/io-cache\n")
mount_fd.write (" option cache-size %sMB\n" % cache_size)
mount_fd.write (" option cache-timeout 1\n")
if self.unused:
mount_fd.write ("# option priority *.html:1,abc*:2 # Priority list for iocaching files\n")
mount_fd.write (" subvolumes readahead\n")
mount_fd.write ("end-volume\n\n")
mount_fd.write ("volume quickread\n")
mount_fd.write (" type performance/quick-read\n")
mount_fd.write (" option cache-timeout 1\n")
mount_fd.write (" option max-file-size 64kB\n")
mount_fd.write (" subvolumes iocache\n")
mount_fd.write ("end-volume\n\n")
mount_fd.write ("volume statprefetch\n")
mount_fd.write (" type performance/stat-prefetch\n")
mount_fd.write (" subvolumes quickread\n")
mount_fd.write ("end-volume\n\n")
return
def create_export_volfile (self):
cmdline = string.join (sys.argv, ' ')
if self.conf_dir:
exp_fd = file ("%s/%s-export.vol" %
(self.conf_dir,
str(self.host + '-' + self.volume_name)),"w")
else:
exp_fd = file ("%s-export.vol" %
(str(self.host + '-' + self.volume_name)),"w")
print "Generating server volfiles.. for server '%s'" % (self.host)
exp_fd.write ("## file auto generated by %s (export.vol)\n" %
sys.argv[0])
exp_fd.write ("# Cmd line:\n")
exp_fd.write ("# $ %s\n\n" % cmdline)
total_bricks = []
i=1
for export in self.host_dict[self.host]:
exp_fd.write ("volume posix%d\n" % i)
exp_fd.write (" type storage/posix\n")
if self.unused:
exp_fd.write("# option o-direct enable # (default: disable) boolean type only\n")
exp_fd.write("# option export-statfs-size no # (default: yes) boolean type only\n")
exp_fd.write("# option mandate-attribute off # (default: on) boolean type only\n")
exp_fd.write("# option span-devices 8 # (default: 0) integer value\n")
exp_fd.write("# option background-unlink yes # (default: no) boolean type\n")
exp_fd.write (" option directory %s\n" % export)
exp_fd.write ("end-volume\n\n")
exp_fd.write ("volume locks%d\n" % i)
exp_fd.write (" type features/locks\n")
if self.unused:
exp_fd.write ("# option mandatory on # Default off, used in specific applications\n")
exp_fd.write (" subvolumes posix%d\n" % i)
exp_fd.write ("end-volume\n\n")
exp_fd.write ("volume brick%d\n" % i)
exp_fd.write (" type performance/io-threads\n")
exp_fd.write (" option thread-count 8\n")
if self.unused:
exp_fd.write ("# option autoscaling yes # Heuristic for autoscaling threads on demand\n")
exp_fd.write ("# option min-threads 2 # min count for thread pool\n")
exp_fd.write ("# option max-threads 64 # max count for thread pool\n")
exp_fd.write (" subvolumes locks%d\n" % i)
exp_fd.write ("end-volume\n\n")
total_bricks.append("brick%s" % i)
i += 1
for transport in self.transports:
exp_fd.write ("volume server-%s\n" % transport)
exp_fd.write (" type protocol/server\n")
exp_fd.write (" option transport-type %s\n" % transport)
for brick in total_bricks:
exp_fd.write (" option auth.addr.%s.allow %s\n" %
(brick, self.auth_parameters))
if transport == 'ib-verbs':
exp_fd.write (" option transport.ib-verbs.listen-port %d\n" % self.gfs_ib_port)
exp_fd.write (" option transport.ib-verbs.port %d\n" %
self.ib_devport)
if transport == 'tcp':
exp_fd.write (" option transport.socket.listen-port %d\n" % self.gfs_port)
exp_fd.write (" option transport.socket.nodelay on\n")
exp_fd.write (" subvolumes %s\n" %
string.join(total_bricks, ' '))
exp_fd.write ("end-volume\n\n")
return
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