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#!/usr/bin/env python
#
# This is a work in progress, adding functionality as I need it.
#
# Chad Kerner - chad.kerner@gmail.com
#
from __future__ import print_function
from subprocess import Popen, PIPE
import sys
import shlex
def run_cmd( cmdstr=None ):
"""
Wrapper around subprocess module calls.
"""
if not cmdstr:
return None
cmd = shlex.split(cmdstr)
subp = Popen(cmd, stdout=PIPE, stderr=PIPE)
(outdata, errdata) = subp.communicate()
if subp.returncode != 0:
Chad Kerner
committed
msg = "Error\n Command: {0}\n Message: {1}".format(cmdstr,errdata)
Chad Kerner
committed
sys.exit( subp.returncode )
"""
The mmlsfileset command returns encoded strings for special characters.
This will replace those encoded strings and return a true string.
"""
tempstring = mystring.replace('%2F', '/')
mystring = tempstring
tempstring = mystring.replace('%3A', ':')
return tempstring
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class Cluster:
"""
This class will collect the information about the cluster.
"""
def __init__( self ):
self.get_cluster_info()
self.get_nsd_info()
def get_nsd_info( self ):
"""
This routing parses the mmlsnsd command.
"""
self.nsd_info = {}
fsdevs = {}
cmd_out = run_cmd("/usr/lpp/mmfs/bin/mmlsnsd")
for line in cmd_out.splitlines():
line.rstrip()
# Ignore blank lines
if not line:
continue
# Ignore dashed lines
if '----------' in line:
continue
# Ignore header lines
if 'File system' in line:
continue
if 'free disk' in line:
nsd_name = line.split()[2]
fsname = 'free'
servers = (line.split()[3]).split(',')
else:
nsd_name = line.split()[1]
fsname = line.split()[0]
servers = (line.split()[2]).split(',')
fsdevs[fsname] = 1
self.nsd_info[nsd_name] = {}
self.nsd_info[nsd_name]['usage'] = fsname
self.nsd_info[nsd_name]['servers'] = servers
self.gpfsdevs = fsdevs.keys()
def get_cluster_info( self ):
"""
This routine parses the mmlscluster command.
"""
self.cluster_info = {}
cmd_out = run_cmd("/usr/lpp/mmfs/bin/mmlscluster")
found_nodes = 0
for line in cmd_out.splitlines():
line.rstrip()
# Ignore blank lines
if not line:
continue
# Ignore dashed lines
if '----------' in line:
continue
if '==========' in line:
continue
if found_nodes >= 1:
nodeid = line.split()[0]
daemonname = line.split()[1]
ipaddr = line.split()[2]
adminname = line.split()[3]
self.cluster_info['nodes'][nodeid] = {}
self.cluster_info['nodes'][nodeid]['daemon_name'] = daemonname
self.cluster_info['nodes'][nodeid]['ip'] = ipaddr
self.cluster_info['nodes'][nodeid]['admin_name'] = adminname
if 'Node Daemon' in line:
found_nodes = found_nodes + 1
self.cluster_info['nodes'] = {}
if 'GPFS cluster name' in line:
self.cluster_info['name'] = line.split()[3]
if 'GPFS cluster id' in line:
self.cluster_info['id'] = line.split()[3]
if 'GPFS UID domain' in line:
self.cluster_info['uid'] = line.split()[3]
if 'Remote shell command' in line:
self.cluster_info['rsh'] = line.split()[3]
if 'Remote file copy command' in line:
self.cluster_info['rcp'] = line.split()[4]
if 'Primary server' in line:
self.cluster_info['primary'] = line.split()[2]
if 'Secondary server' in line:
self.cluster_info['secondary'] = line.split()[2]
def dump( self ):
if debug == 1:
print("Cluster Information")
for key in self.cluster_info.keys():
print("{0} -> {1}".format(key, self.cluster_info[key]))
if debug == 2:
print("\nNSD Information")
for key in self.nsd_info.keys():
print("{0} -> FS: {1} Servers: {2}".format(key, self.nsd_info[key]['usage'], self.nsd_info[key]['servers']))
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def remove_special_characters( mystring ):
tempstring = mystring.replace('%', '')
mystring = tempstring
tempstring = mystring.replace('(', '')
mystring = tempstring
tempstring = mystring.replace(')', '')
return tempstring
class StoragePool:
def __init__( self, gpfsdev ):
self.gpfsdev = gpfsdev
self.pools = {}
cmd_out = run_cmd("/usr/lpp/mmfs/bin/mmlspool {}".format( self.gpfsdev))
for line in cmd_out.splitlines()[2:]:
line.rstrip()
# Ignore blank lines
if not line:
continue
newline = remove_special_characters( line )
vals = newline.split()
poolname = vals[0]
self.pools[poolname] = {}
self.pools[poolname]['id'] = vals[1]
self.pools[poolname]['blksize'] = vals[2]
self.pools[poolname]['blkmod'] = vals[3]
self.pools[poolname]['data'] = vals[4]
self.pools[poolname]['metadata'] = vals[5]
self.pools[poolname]['datasize'] = vals[6]
self.pools[poolname]['datafree'] = vals[7]
self.pools[poolname]['datapctfree'] = vals[8]
self.pools[poolname]['metasize'] = vals[9]
self.pools[poolname]['metafree'] = vals[10]
self.pools[poolname]['metapctfree'] = vals[11]
self.pool_list = self.pools.keys()
def dump( self ):
print("{}".format(self.pools))
def __getitem__( self, key ):
return self.pools[key]
class Snapshots:
def __init__( self, gpfsdev, fileset='' ):
self.gpfsdev = gpfsdev
self.fileset = fileset
self.snap_name_separator = '_'
self.snapshots = {}
if self.fileset == '':
cmd_out = run_cmd("/usr/lpp/mmfs/bin/mmlssnapshot {0} -Y".format( self.gpfsdev ))
else:
cmd_out = run_cmd("/usr/lpp/mmfs/bin/mmlssnapshot {0} -j {1} -Y".format( self.gpfsdev, self.fileset ))
# Process the HEADER line
if 'No snapshots in file system' in cmd_out.splitlines()[0]:
self.snap_count = 0
return
keys = cmd_out.splitlines()[0].split(':')[6:]
for line in cmd_out.splitlines()[1:]:
line.rstrip()
# Ignore blank lines
if not line:
continue
vals = line.split(':')[6:]
sname = vals[1]
self.snapshots[sname] = {}
for idx in range(len(vals)-1):
self.snapshots[sname][keys[idx]] = replace_encoded_strings( vals[idx] )
snaplist = self.snapshots.keys()
self.snaplist = sorted( snaplist )
self.snap_count = len( snaplist )
"""
Given an integer of how many snapshots you want to keep, this will return a list of snapshot
names that are to be purged. It does not purge them, only a list of what needs to be purged
based on how many you want to keep.
"""
if self.snap_count <= max_to_keep:
self.dellist = list(self.snaplist)[ : -( max_to_keep ) ]
return self.dellist
def delsnap( self, snap_name ):
"""
Given a specific snapshot name, this routine will execute mmdelsnapshot and return you the output
from the command. The object already knows if it is a filesystem or a fileset snapshot, so you just
need to specify the snapshot name.
"""
cmd_out = run_cmd("/usr/lpp/mmfs/bin/mmdelsnapshot {} {}".format(self.gpfsdev, snap_name))
cmd_out = run_cmd("/usr/lpp/mmfs/bin/mmdelsnapshot {} {} -j {}".format(self.gpfsdev, snap_name, self.fileset))
return cmd_out
def snap( self ):
"""
This code will create a snapshot of the specified filesystem or fileset.
NOTE: You can NOT mix filesystem and fileset snapshots on the same GPFS device.
Filesystem snapshots are named: CCYYMMDD==HHMM for easy sorting / processing.
Filesystem snapshots are named: <Fileset>==CCYYMMDD==HHMM for easy processing again.
"""
if self.fileset == '':
snapname = time.strftime("%Y%m%d") + self.snap_name_separator + time.strftime("%H%M")
cmd_out = run_cmd("/usr/lpp/mmfs/bin/mmcrsnapshot {0} {1}".format( self.gpfsdev, snapname ))
else:
snapname = self.fileset + self.snap_name_separator + time.strftime("%Y%m%d") + self.snap_name_separator + time.strftime("%H%M")
cmd_out = run_cmd("/usr/lpp/mmfs/bin/mmcrsnapshot {0} {1} -j {2}".format( self.gpfsdev, snapname, self.fileset ))
class Filesystem:
"""
This class will collect the information about the specified GPFS device.
"""
filesystem_defaults = { 'automaticMountOption': 'yes',
'defaultMetadataReplicas': '1',
'maxMetadataReplicas': '2',
'defaultDataReplicas': '1',
'maxDataReplicas': '2',
'blockAllocationType': '',
'fileLockingSemantics': '',
}
def __init__( self, gpfsdev ):
if not gpfsdev:
raise ValueError('NoDevice')
else:
self.gpfsdev = gpfsdev
self.get_filesystem_information()
self.get_fileset_information()
def print_keys( self ):
keys = self.filesys.keys()
return keys
def get_pool_information( self ):
self.pools = StoragePool( self.gpfsdev )
def get_filesystem_information( self ):
self.filesys = {}
cmd_out = run_cmd("/usr/lpp/mmfs/bin/mmlsfs {0} -Y".format(self.gpfsdev))
for line in cmd_out.splitlines():
line.rstrip()
# Ignore blank lines
if not line:
continue
# Ignore HEADER line
if 'HEADER' in line:
continue
key = line.split(':')[7]
value = line.split(':')[8]
self.filesys[key] = replace_encoded_strings( value )
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def fileset_list( self ):
"""
Return all of the fileset names in the file system.
"""
return self.filesets.keys()
def get_fileset_information( self ):
self.filesets = {}
cmd_out = run_cmd("/usr/lpp/mmfs/bin/mmlsfileset {0} -Y".format(self.gpfsdev))
# Process the HEADER line
keys = cmd_out.splitlines()[0].split(':')[7:]
for line in cmd_out.splitlines()[1:]:
line.rstrip()
# Ignore blank lines
if not line:
continue
vals = line.split(':')[7:]
fname = vals[0]
self.filesets[fname] = {}
for idx in range(len(vals)-1):
self.filesets[fname][keys[idx]] = replace_encoded_strings( vals[idx] )
@classmethod
def Create( self, gpfsdev, fsname ):
"""
This function will create a new filesystem.
Input 1: A dictionary containing the nsd's and their parameters.
mydisks['nsd1']['usage']='dataAndMetadata'
mydisks['nsd1']['failuregroup']='-1'
mydisks['nsd1']['pool']='system'
Input 2: A dictionary containing parameters for the file system.
"""
print("Creating {0} on {1}".format(fsname, gpfsdev))
self = Filesystem( gpfsdev )
return self
def __getitem__( self, key ):
return self.filesys[key]
if __name__ == '__main__':
#
# This is just where I do my testing of stuff.
#
snap = Snapshots( 'condo', 'root' )
sys.exit(0)
myFS = Filesystem( 'condo' )
fslist = myFS.fileset_list()
print("{}".format(myFS.filesets))
newfs = Filesystem.Create( 'fs0', 'chad' )
Clstr = Cluster()
#Clstr.dump()
print(Clstr.gpfsdevs)
myFs = Filesystem( 'wvu' )
FSa = Filesystem( 'des003' )
print(myFs['disks'])
print(FSa['disks'])
try:
F = Filesystem('')
except:
print("No Filesystem device specified.")
else:
print(F[disks])