3 # Copyright (c) 2003 Intel Corporation
6 # Copyright (c) 2004-2006 The Trustees of Princeton University
11 import InstallPartitionDisks
12 from Exceptions import *
22 Find any new large block devices we can add to the vservers volume group
24 Expect the following variables to be set:
25 SYSIMG_PATH the path where the system image will be mounted
26 MINIMUM_DISK_SIZE any disks smaller than this size, in GB, are not used
27 NODE_MODEL_OPTIONS the node's model options
29 Set the following variables upon successfully running:
30 ROOT_MOUNTED the node root file system is mounted
33 log.write("\n\nStep: Checking for unused disks to add to LVM.\n")
35 # make sure we have the variables we need
37 SYSIMG_PATH = vars["SYSIMG_PATH"]
39 raise ValueError("SYSIMG_PATH")
41 MINIMUM_DISK_SIZE = int(vars["MINIMUM_DISK_SIZE"])
43 PARTITIONS = vars["PARTITIONS"]
44 if PARTITIONS == None:
45 raise ValueError("PARTITIONS")
47 NODE_MODEL_OPTIONS = vars["NODE_MODEL_OPTIONS"]
48 except KeyError as var:
49 raise BootManagerException("Missing variable in vars: {}\n".format(var))
50 except ValueError as var:
51 raise BootManagerException("Variable in vars, shouldn't be: {}\n".format(var))
53 devices_dict = systeminfo.get_block_devices_dict(vars, log)
55 # will contain the new devices to add to the volume group
58 # total amount of new space in gb
61 for device, details in devices_dict.items():
63 (major, minor, blocks, gb_size, readonly) = details
65 if device[:14] == "/dev/planetlab":
66 log.write("Skipping device {} in volume group.\n".format(device))
70 log.write("Skipping read only device {}\n".format(device))
73 if gb_size < MINIMUM_DISK_SIZE:
74 log.write("Skipping too small device {} ({:4.2f}) Gb\n"\
75 .format(device, gb_size))
78 log.write("Checking device {} to see if it is part " \
79 "of the volume group.\n".format(device))
82 # when introducing the 'upgrade' verb, we ran into the situation
83 # where 'pvdisplay' at this point displays e.g. /dev/sda, instead
85 # we thus consider that if either of these is known, then
86 # the disk is already part of LVM
87 first_partition = InstallPartitionDisks.get_partition_path_from_device(device, vars, log)
88 probe_first_part = "pvdisplay {} | grep -q planetlab".format(first_partition)
89 probe_device = "pvdisplay {} | grep -q planetlab".format(device)
90 already_added = utils.sysexec_noerr(probe_first_part, log, shell=True) \
91 or utils.sysexec_noerr(probe_device, log, shell=True)
94 log.write("It appears {} is part of the volume group, continuing.\n"\
98 # just to be extra paranoid, ignore the device if it already has
99 # an lvm partition on it (new disks won't have this, and that is
100 # what this code is for, so it should be ok).
101 cmd = "parted --script --list {} | grep -q lvm$".format(device)
102 has_lvm = utils.sysexec_noerr(cmd, log, shell=True)
104 log.write("It appears {} has lvm already setup on it.\n".format(device))
107 log.write("Too paranoid to add {} to vservers lvm.\n".format(device))
110 if not InstallPartitionDisks.single_partition_device(device, vars, log):
111 log.write("Unable to partition {}, not using it.\n".format(device))
114 log.write("Successfully partitioned {}\n".format(device))
116 if NODE_MODEL_OPTIONS & ModelOptions.RAWDISK:
117 log.write("Running on a raw disk node, not using it.\n")
120 part_path = InstallPartitionDisks.get_partition_path_from_device(device,
123 log.write("Attempting to add {} to the volume group\n".format(device))
125 if not InstallPartitionDisks.create_lvm_physical_volume(part_path,
127 log.write("Unable to create lvm physical volume {}, not using it.\n"\
131 log.write("Adding {} to list of devices to add to "
132 "planetlab volume group.\n".format(device))
134 extended_gb_size = extended_gb_size + gb_size
135 new_devices.append(part_path)
138 if len(new_devices) > 0:
140 log.write("Extending planetlab volume group.\n")
142 log.write("Unmounting disks.\n")
144 # backwards compat, though, we should never hit this case post PL 3.2
145 os.stat("{}/rcfs/taskclass".format(SYSIMG_PATH))
146 utils.sysexec_chroot_noerr(SYSIMG_PATH, "umount /rcfs", log)
150 # umount in order to extend disk size
151 utils.sysexec_noerr("umount {}/proc".format(SYSIMG_PATH), log)
152 utils.sysexec_noerr("umount {}/vservers".format(SYSIMG_PATH), log)
153 utils.sysexec_noerr("umount {}".format(SYSIMG_PATH), log)
154 utils.sysexec("vgchange -an", log)
156 vars['ROOT_MOUNTED'] = 0
159 cmd = "vgextend planetlab {}".format(" ".join(new_devices))
160 if not utils.sysexec_noerr(cmd, log):
161 log.write("Failed to add physical volumes {} to "\
162 "volume group, continuing.\n".format(" ".join(new_devices)))
166 # now, get the number of unused extents, and extend the vserver
167 # logical volume by that much.
168 remaining_extents = \
169 InstallPartitionDisks.get_remaining_extents_on_vg(vars, log)
171 log.write("Extending vservers logical volume.\n")
172 utils.sysexec("vgchange -ay", log)
173 cmd = "lvextend -l +{} {}".format(remaining_extents, PARTITIONS["vservers"])
174 if not utils.sysexec_noerr(cmd, log):
175 log.write("Failed to extend vservers logical volume, continuing\n")
179 log.write("making the ext filesystem match new logical volume size.\n")
181 vars['ROOT_MOUNTED'] = 1
182 cmd = "mount {} {}".format(PARTITIONS["root"], SYSIMG_PATH)
183 utils.sysexec_noerr(cmd, log)
184 cmd = "mount {} {}/vservers".format(PARTITIONS["vservers"], SYSIMG_PATH)
185 utils.sysexec_noerr(cmd, log)
186 cmd = "resize2fs {}".format(PARTITIONS["vservers"])
187 resize = utils.sysexec_noerr(cmd,log)
188 utils.sysexec_noerr("umount {}/vservers".format(SYSIMG_PATH), log)
189 utils.sysexec_noerr("umount {}".format(SYSIMG_PATH), log)
190 vars['ROOT_MOUNTED'] = 0
192 utils.sysexec("vgchange -an", log)
195 log.write("Failed to resize vservers partition, continuing.\n")
199 log.write("Extended vservers partition by {:4.2f} Gb\n"\
200 .format(extended_gb_size))
205 log.write("No new disk devices to add to volume group.\n")