3 # Copyright (c) 2003 Intel Corporation
6 # Copyright (c) 2004-2006 The Trustees of Princeton University
8 # expected /proc/partitions format
15 from Exceptions import *
17 import BootServerRequest
23 Setup the block devices for install, partition them w/ LVM
25 Expect the following variables from the store:
26 INSTALL_BLOCK_DEVICES list of block devices to install onto
27 TEMP_PATH somewhere to store what we need to run
28 ROOT_SIZE the size of the root logical volume
29 SWAP_SIZE the size of the swap partition
32 log.write( "\n\nStep: Install: partitioning disks.\n" )
34 # make sure we have the variables we need
36 TEMP_PATH= vars["TEMP_PATH"]
38 raise ValueError, "TEMP_PATH"
40 INSTALL_BLOCK_DEVICES= vars["INSTALL_BLOCK_DEVICES"]
41 if( len(INSTALL_BLOCK_DEVICES) == 0 ):
42 raise ValueError, "INSTALL_BLOCK_DEVICES is empty"
44 ROOT_SIZE= vars["ROOT_SIZE"]
45 if ROOT_SIZE == "" or ROOT_SIZE == 0:
46 raise ValueError, "ROOT_SIZE invalid"
48 SWAP_SIZE= vars["SWAP_SIZE"]
49 if SWAP_SIZE == "" or SWAP_SIZE == 0:
50 raise ValueError, "SWAP_SIZE invalid"
52 NODE_MODEL_OPTIONS= vars["NODE_MODEL_OPTIONS"]
54 PARTITIONS= vars["PARTITIONS"]
55 if PARTITIONS == None:
56 raise ValueError, "PARTITIONS"
59 raise BootManagerException, "Missing variable in vars: %s\n" % var
60 except ValueError, var:
61 raise BootManagerException, "Variable in vars, shouldn't be: %s\n" % var
63 bs_request= BootServerRequest.BootServerRequest()
66 # disable swap if its on
67 utils.sysexec_noerr( "swapoff %s" % PARTITIONS["swap"], log )
69 # shutdown and remove any lvm groups/volumes
70 utils.sysexec_noerr( "vgscan", log )
71 utils.sysexec_noerr( "vgchange -ay", log )
72 utils.sysexec_noerr( "lvremove -f %s" % PARTITIONS["root"], log )
73 utils.sysexec_noerr( "lvremove -f %s" % PARTITIONS["swap"], log )
74 utils.sysexec_noerr( "lvremove -f %s" % PARTITIONS["vservers"], log )
75 utils.sysexec_noerr( "vgchange -an", log )
76 utils.sysexec_noerr( "vgremove planetlab", log )
78 log.write( "Running vgscan for devices\n" )
79 utils.sysexec_noerr( "vgscan", log )
83 for device in INSTALL_BLOCK_DEVICES:
85 if single_partition_device( device, vars, log ):
86 used_devices.append( device )
87 log.write( "Successfully initialized %s\n" % device )
89 log.write( "Unable to partition %s, not using it.\n" % device )
92 # list of devices to be used with vgcreate
95 # initialize the physical volumes
96 for device in used_devices:
98 part_path= get_partition_path_from_device( device, vars, log )
100 if not create_lvm_physical_volume( part_path, vars, log ):
101 raise BootManagerException, "Could not create lvm physical volume " \
102 "on partition %s" % part_path
104 vg_device_list = vg_device_list + " " + part_path
106 # create an lvm volume group
107 utils.sysexec( "vgcreate -s32M planetlab %s" % vg_device_list, log)
109 # create swap logical volume
110 utils.sysexec( "lvcreate -L%s -nswap planetlab" % SWAP_SIZE, log )
112 # create root logical volume
113 utils.sysexec( "lvcreate -L%s -nroot planetlab" % ROOT_SIZE, log )
115 # create vservers logical volume with all remaining space
116 # first, we need to get the number of remaining extents we can use
117 remaining_extents= get_remaining_extents_on_vg( vars, log )
119 utils.sysexec( "lvcreate -l%s -nvservers planetlab" % remaining_extents, log )
121 # activate volume group (should already be active)
122 #utils.sysexec( TEMP_PATH + "vgchange -ay planetlab", log )
125 utils.sysexec( "mkswap %s" % PARTITIONS["swap"], log )
127 # check if badhd option has been set
130 if NODE_MODEL_OPTIONS & ModelOptions.BADHD:
132 txt = " with bad block search enabled, which may take a while"
134 # filesystems partitions names and their corresponding
135 # reserved-blocks-percentages
136 filesystems = {"root":5,"vservers":0}
138 # make the file systems
139 for fs in filesystems.keys():
140 # get the reserved blocks percentage
141 rbp = filesystems[fs]
142 devname = PARTITIONS[fs]
143 log.write("formatting %s partition (%s)%s.\n" % (fs,devname,txt))
144 utils.sysexec( "mkfs.ext2 -q %s -m %d -j %s" % (option,rbp,devname), log )
146 # save the list of block devices in the log
147 log.write( "Block devices used (in lvm): %s\n" % repr(used_devices))
149 # list of block devices used may be updated
150 vars["INSTALL_BLOCK_DEVICES"]= used_devices
156 def single_partition_device( device, vars, log ):
158 initialize a disk by removing the old partition tables,
159 and creating a new single partition that fills the disk.
161 return 1 if sucessful, 0 otherwise
166 lvm_flag= parted.partition_flag_get_by_name('lvm')
169 # wipe the old partition table
170 utils.sysexec( "dd if=/dev/zero of=%s bs=512 count=1" % device, log )
173 dev= parted.PedDevice.get(device)
175 # create a new partition table
176 disk= dev.disk_new_fresh(parted.disk_type_get("msdos"))
178 # create one big partition on each block device
179 constraint= dev.constraint_any()
181 new_part= disk.partition_new(
182 parted.PARTITION_PRIMARY,
183 parted.file_system_type_get("ext2"),
186 # make it an lvm partition
187 new_part.set_flag(lvm_flag,1)
189 # actually add the partition to the disk
190 disk.add_partition(new_part, constraint)
192 disk.maximize_partition(new_part,constraint)
197 except BootManagerException, e:
198 log.write( "BootManagerException while running: %s\n" % str(e) )
201 except parted.error, e:
202 log.write( "parted exception while running: %s\n" % str(e) )
209 def create_lvm_physical_volume( part_path, vars, log ):
211 make the specificed partition a lvm physical volume.
213 return 1 if successful, 0 otherwise.
217 # again, wipe any old data, this time on the partition
218 utils.sysexec( "dd if=/dev/zero of=%s bs=512 count=1" % part_path, log )
219 ### patch Thierry Parmentelat, required on some hardware
222 utils.sysexec( "pvcreate -ffy %s" % part_path, log )
223 except BootManagerException, e:
224 log.write( "create_lvm_physical_volume failed.\n" )
231 def get_partition_path_from_device( device, vars, log ):
233 given a device, return the path of the first partition on the device
236 # those who wrote the cciss driver just had to make it difficult
237 cciss_test= "/dev/cciss"
238 if device[:len(cciss_test)] == cciss_test:
239 part_path= device + "p1"
241 part_path= device + "1"
247 def get_remaining_extents_on_vg( vars, log ):
249 return the free amount of extents on the planetlab volume group
252 c_stdout, c_stdin = popen2.popen2("vgdisplay -c planetlab")
253 result= string.strip(c_stdout.readline())
256 remaining_extents= string.split(result,":")[15]
258 return remaining_extents