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 notify_messages
23 Make sure the hardware we are running on is sufficient for
24 the PlanetLab OS to be installed on. In the process, identify
25 the list of block devices that may be used for a node installation,
26 and identify the cdrom device that we booted off of.
28 Return 1 if requiremenst met, 0 if requirements not met. Raise
29 BootManagerException if any problems occur that prevent the requirements
32 Expect the following variables from the store:
34 MINIMUM_MEMORY minimum amount of memory in kb required
36 NODE_ID the node_id from the database for this node
37 MINIMUM_DISK_SIZE any disks smaller than this size, in GB, are not used
38 TOTAL_MINIMUM_DISK_SIZE total disk size in GB, if all usable disks
39 meet this number, there isn't enough disk space for
40 this node to be usable after install
41 SKIP_HARDWARE_REQUIREMENT_CHECK
42 If set, don't check if minimum requirements are met
43 Sets the following variables:
44 INSTALL_BLOCK_DEVICES list of block devices to install onto
47 log.write( "\n\nStep: Checking if hardware requirements met.\n" )
50 MINIMUM_MEMORY= int(vars["MINIMUM_MEMORY"])
51 if MINIMUM_MEMORY == "":
52 raise ValueError, "MINIMUM_MEMORY"
54 NODE_ID= vars["NODE_ID"]
56 raise ValueError("NODE_ID")
58 MINIMUM_DISK_SIZE= int(vars["MINIMUM_DISK_SIZE"])
60 TOTAL_MINIMUM_DISK_SIZE= \
61 int(vars["TOTAL_MINIMUM_DISK_SIZE"])
63 SKIP_HARDWARE_REQUIREMENT_CHECK= \
64 int(vars["SKIP_HARDWARE_REQUIREMENT_CHECK"])
67 raise BootManagerException, \
68 "Missing variable in install store: %s" % var
69 except ValueError, var:
70 raise BootManagerException, \
71 "Variable in install store blank, shouldn't be: %s" % var
73 # lets see if we have enough memory to run
74 log.write( "Checking for available memory.\n" )
76 total_mem= systeminfo.get_total_phsyical_mem(vars, log)
78 raise BootManagerException, "Unable to read total physical memory"
80 if total_mem < MINIMUM_MEMORY:
81 if not SKIP_HARDWARE_REQUIREMENT_CHECK:
82 log.write( "Insufficient memory to run node: %s kb\n" % total_mem )
83 log.write( "Required memory: %s kb\n" % MINIMUM_MEMORY )
91 sent= BootAPI.call_api_function( vars, "BootNotifyOwners",
92 (notify_messages.MSG_INSUFFICIENT_MEMORY,
96 except BootManagerException, e:
97 log.write( "Call to BootNotifyOwners failed: %s.\n" % e )
100 log.write( "Unable to notify site contacts of problem.\n" )
102 log.write( "Notified contacts of problem.\n" )
106 log.write( "Memory requirements not met, but running anyway: %s kb\n"
109 log.write( "Looks like we have enough memory: %s kb\n" % total_mem )
113 # get a list of block devices to attempt to install on
114 # (may include cdrom devices)
115 install_devices= systeminfo.get_block_device_list(vars, log)
117 # save the list of block devices in the log
118 log.write( "Detected block devices:\n" )
119 log.write( repr(install_devices) + "\n" )
121 if not install_devices or len(install_devices) == 0:
122 log.write( "No block devices detected.\n" )
130 sent= BootAPI.call_api_function( vars, "BootNotifyOwners",
131 (notify_messages.MSG_INSUFFICIENT_DISK,
135 except BootManagerException, e:
136 log.write( "Call to BootNotifyOwners failed: %s.\n" % e )
139 log.write( "Unable to notify site contacts of problem.\n" )
143 # now, lets remove any block devices we know won't work (readonly,cdroms),
144 # or could be other writable removable disks (usb keychains, zip disks, etc)
145 # i'm not aware of anything that helps with the latter test, so,
146 # what we'll probably do is simply not use any block device below
147 # some size threshold (set in installstore)
149 # also, keep track of the total size for all devices that appear usable
152 for device in install_devices.keys():
154 (major,minor,blocks,gb_size,readonly)= install_devices[device]
156 # if the device string starts with
157 # planetlab or dm- (device mapper), ignore it (could be old lvm setup)
158 if device[:14] == "/dev/planetlab" or device[:8] == "/dev/dm-":
159 del install_devices[device]
162 if gb_size < MINIMUM_DISK_SIZE:
163 log.write( "Device is too small to use: %s \n(appears" \
164 " to be %4.2f GB)\n" % (device,gb_size) )
166 del install_devices[device]
172 log.write( "Device is readonly, not using: %s\n" % device )
174 del install_devices[device]
179 # add this sector count to the total count of usable
180 # sectors we've found.
181 total_size= total_size + gb_size
184 if len(install_devices) == 0:
185 log.write( "No suitable block devices found for install.\n" )
193 sent= BootAPI.call_api_function( vars, "BootNotifyOwners",
194 (notify_messages.MSG_INSUFFICIENT_DISK,
198 except BootManagerException, e:
199 log.write( "Call to BootNotifyOwners failed: %s.\n" % e )
202 log.write( "Unable to notify site contacts of problem.\n" )
207 # show the devices we found that are usable
208 log.write( "Usable block devices:\n" )
209 log.write( repr(install_devices.keys()) + "\n" )
211 # save the list of devices for the following steps
212 vars["INSTALL_BLOCK_DEVICES"]= install_devices.keys()
215 # ensure the total disk size is large enough. if
216 # not, we need to email the tech contacts the problem, and
217 # put the node into debug mode.
218 if total_size < TOTAL_MINIMUM_DISK_SIZE:
219 if not SKIP_HARDWARE_REQUIREMENT_CHECK:
220 log.write( "The total usable disk size of all disks is " \
221 "insufficient to be usable as a PlanetLab node.\n" )
228 sent= BootAPI.call_api_function( vars, "BootNotifyOwners",
229 (notify_messages.MSG_INSUFFICIENT_DISK,
233 except BootManagerException, e:
234 log.write( "Call to BootNotifyOwners failed: %s.\n" % e )
237 log.write( "Unable to notify site contacts of problem.\n" )
242 log.write( "The total usable disk size of all disks is " \
243 "insufficient, but running anyway.\n" )
245 log.write( "Total size for all usable block devices: %4.2f GB\n" % total_size )