| 1 | #!/usr/local/bin/python |
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| 2 | |
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| 3 | import sys, os |
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| 4 | import re |
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| 5 | |
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| 6 | import tempfile |
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| 7 | import subprocess |
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| 8 | import logging |
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| 9 | import time |
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| 10 | import signal |
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| 11 | |
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| 12 | import util |
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| 13 | |
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| 14 | from local_segment import local_segment |
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| 15 | from federation.emulab_segment import emulab_segment |
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| 16 | |
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| 17 | |
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| 18 | class start_segment(local_segment, emulab_segment): |
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| 19 | def __init__(self, log=None, keyfile=None, debug=False, boss=None, |
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| 20 | cert=None): |
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| 21 | local_segment.__init__(self, log=log, keyfile=keyfile, debug=debug) |
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| 22 | emulab_segment.__init__(self, boss=boss, cert=cert) |
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| 23 | self.node = { } |
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| 24 | |
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| 25 | def set_up_experiment_filespace(self, pid, eid, tmpdir): |
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| 26 | # Configuration directories on this machine |
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| 27 | proj_dir = "/proj/%s/exp/%s/tmp" % (pid, eid) |
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| 28 | softdir = "/proj/%s/software/%s" % (pid, eid) |
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| 29 | # Softwrae staging directory software dir |
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| 30 | lsoftdir = "%s/software" % tmpdir |
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| 31 | |
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| 32 | # Set up the experiment's file space |
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| 33 | if not self.cmd_with_timeout("/bin/rm -rf %s" % proj_dir): |
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| 34 | return False |
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| 35 | # Clear and create the software and configuration directories |
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| 36 | if not self.cmd_with_timeout("/bin/rm -rf %s/*" % softdir): |
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| 37 | return False |
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| 38 | if not self.cmd_with_timeout('mkdir -p %s' % proj_dir): |
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| 39 | return False |
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| 40 | if os.path.isdir(lsoftdir): |
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| 41 | if not self.cmd_with_timeout('mkdir -p %s' % softdir): |
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| 42 | return False |
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| 43 | |
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| 44 | try: |
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| 45 | for f in os.listdir(tmpdir): |
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| 46 | if not os.path.isdir("%s/%s" % (tmpdir, f)): |
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| 47 | self.copy_file("%s/%s" % (tmpdir, f), |
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| 48 | "%s/%s" % (proj_dir, f)) |
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| 49 | if os.path.isdir(lsoftdir): |
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| 50 | for f in os.listdir(lsoftdir): |
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| 51 | if not os.path.isdir("%s/%s" % (lsoftdir, f)): |
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| 52 | self.copy_file("%s/%s" % (lsoftdir, f), |
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| 53 | "%s/%s" % (softdir, f)) |
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| 54 | except EnvironmentError, e: |
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| 55 | self.log.error("Error copying file: %s" %e) |
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| 56 | return False |
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| 57 | |
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| 58 | return True |
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| 59 | |
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| 60 | def __call__(self, parent, eid, pid, user, tclfile, tmpdir, timeout=0, |
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| 61 | gid=None): |
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| 62 | """ |
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| 63 | Start a sub-experiment on a federant. |
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| 64 | |
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| 65 | Get the current state, and terminate the experiment if it exists. The |
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| 66 | group membership of the experiment is difficult to determine or change, |
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| 67 | so start with a clean slate. Create a new one and ship data |
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| 68 | and configs and start the experiment. There are small ordering |
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| 69 | differences based on the initial state of the sub-experiment. |
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| 70 | """ |
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| 71 | |
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| 72 | state = self.get_state(pid, eid) |
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| 73 | |
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| 74 | if state != 'none': |
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| 75 | self.terminate_exp(pid, eid) |
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| 76 | |
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| 77 | if not self.make_null_experiment(pid, eid, tmpdir, gid): |
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| 78 | return False |
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| 79 | |
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| 80 | if not self.set_up_experiment_filespace(pid, eid, tmpdir): |
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| 81 | return False |
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| 82 | |
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| 83 | # Put the file into a string to pass to emulab. |
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| 84 | try: |
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| 85 | tcl = "".join([ l for l in open(tclfile,"r")]) |
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| 86 | except EnvironmentError, e: |
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| 87 | self.log.error("Can't read %s: %s" % (tclfile, e)) |
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| 88 | return False |
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| 89 | |
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| 90 | # Stage the new configuration |
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| 91 | if not self.modify_exp(pid, eid, tcl): |
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| 92 | self.log.error("modify failed") |
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| 93 | return False |
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| 94 | |
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| 95 | if not self.swap_exp(pid, eid, 'in'): |
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| 96 | self.log.error("swap in failed") |
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| 97 | return False |
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| 98 | # Everything has gone OK. |
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| 99 | self.get_mapping(pid,eid) |
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| 100 | return True |
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| 101 | |
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| 102 | class stop_segment(local_segment, emulab_segment): |
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| 103 | def __init__(self, log=None, keyfile=None, debug=False, boss=None, |
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| 104 | cert=None): |
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| 105 | local_segment.__init__(self, log=log, keyfile=keyfile, debug=debug) |
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| 106 | emulab_segment.__init__(self, boss=boss, cert=cert) |
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| 107 | |
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| 108 | def __call__(self, parent, user, pid, eid, gid=None, terminate=False): |
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| 109 | """ |
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| 110 | Stop a sub experiment by calling swapexp on the federant |
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| 111 | """ |
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| 112 | |
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| 113 | self.log.info("[stop_segment]: Stopping %s" % eid) |
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| 114 | rv = False |
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| 115 | try: |
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| 116 | # Clean out tar files: we've gone over quota in the past |
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| 117 | self.cmd_with_timeout("rm -rf /proj/%s/software/%s" % (pid, eid)) |
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| 118 | rv = self.swap_exp(pid, eid, 'out') |
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| 119 | if terminate: |
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| 120 | rv = self.terminate_exp(pid, eid) |
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| 121 | except self.cmd_timeout: |
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| 122 | rv = False |
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| 123 | return rv |
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| 124 | |
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