| 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 ssh_emulab_segment import ssh_emulab_segment |
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| 15 | from xmlrpc_emulab_segment import xmlrpc_emulab_segment |
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| 16 | |
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| 17 | |
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| 18 | class start_segment(ssh_emulab_segment, xmlrpc_emulab_segment): |
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| 19 | def __init__(self, log=None, keyfile=None, debug=False, boss=None, |
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| 20 | ops=None, cert=None): |
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| 21 | ssh_emulab_segment.__init__(self, log=log, keyfile=keyfile, debug=debug) |
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| 22 | xmlrpc_emulab_segment.__init__(self, boss=boss, ops=ops, cert=cert) |
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| 23 | |
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| 24 | def set_up_experiment_filespace(self, user, host, pid, eid, tmpdir): |
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| 25 | """ |
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| 26 | Send all the software and configuration files into the experiment's |
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| 27 | file space. To reduce the number of ssh connections, we script many |
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| 28 | changes and execute the script. |
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| 29 | """ |
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| 30 | # Configuration directories on the remote machine |
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| 31 | proj_dir = "/proj/%s/exp/%s/tmp" % (pid, eid) |
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| 32 | softdir = "/proj/%s/software/%s" % (pid, eid) |
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| 33 | # Local software dir |
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| 34 | lsoftdir = "%s/software" % tmpdir |
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| 35 | |
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| 36 | # Open up a temporary file to contain a script for setting up the |
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| 37 | # filespace for the new experiment. |
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| 38 | self.log.info("[start_segment]: creating script file") |
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| 39 | try: |
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| 40 | sf, scriptname = tempfile.mkstemp() |
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| 41 | scriptfile = os.fdopen(sf, 'w') |
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| 42 | except EnvironmentError: |
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| 43 | return False |
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| 44 | |
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| 45 | scriptbase = os.path.basename(scriptname) |
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| 46 | |
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| 47 | # Script the filesystem changes |
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| 48 | print >>scriptfile, "/bin/rm -rf %s" % proj_dir |
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| 49 | # Clear and create the software directory |
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| 50 | print >>scriptfile, "/bin/rm -rf %s/*" % softdir |
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| 51 | print >>scriptfile, 'mkdir -p %s' % proj_dir |
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| 52 | if os.path.isdir(lsoftdir): |
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| 53 | print >>scriptfile, 'mkdir -p %s' % softdir |
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| 54 | print >>scriptfile, "rm -f %s" % scriptbase |
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| 55 | scriptfile.close() |
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| 56 | |
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| 57 | # Move the script to the remote machine |
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| 58 | # XXX: could collide tempfile names on the remote host |
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| 59 | if self.scp_file(scriptname, user, host, scriptbase): |
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| 60 | os.remove(scriptname) |
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| 61 | else: |
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| 62 | return False |
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| 63 | |
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| 64 | # Execute the script (and the script's last line deletes it) |
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| 65 | if not self.ssh_cmd(user, host, "sh -x %s" % scriptbase): |
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| 66 | return False |
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| 67 | |
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| 68 | for f in os.listdir(tmpdir): |
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| 69 | if not os.path.isdir("%s/%s" % (tmpdir, f)): |
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| 70 | if not self.scp_file("%s/%s" % (tmpdir, f), user, host, |
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| 71 | "%s/%s" % (proj_dir, f)): |
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| 72 | return False |
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| 73 | if os.path.isdir(lsoftdir): |
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| 74 | for f in os.listdir(lsoftdir): |
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| 75 | if not os.path.isdir("%s/%s" % (lsoftdir, f)): |
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| 76 | if not self.scp_file("%s/%s" % (lsoftdir, f), |
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| 77 | user, host, "%s/%s" % (softdir, f)): |
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| 78 | return False |
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| 79 | return True |
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| 80 | |
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| 81 | |
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| 82 | def __call__(self, parent, eid, pid, user, tclfile, tmpdir, timeout=0, |
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| 83 | gid=None): |
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| 84 | """ |
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| 85 | Start a sub-experiment on a federant. |
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| 86 | |
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| 87 | Get the current state, and terminate the experiment if it exists. The |
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| 88 | group membership of the experiment is difficult to determine or change, |
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| 89 | so start with a clean slate. Create a new one and ship data |
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| 90 | and configs and start the experiment. There are small ordering |
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| 91 | differences based on the initial state of the sub-experiment. |
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| 92 | """ |
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| 93 | |
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| 94 | state = self.get_state(pid, eid) |
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| 95 | |
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| 96 | if state != 'none': |
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| 97 | self.terminate_exp(pid, eid) |
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| 98 | |
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| 99 | if not self.make_null_experiment(pid, eid, tmpdir, gid): |
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| 100 | return False |
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| 101 | |
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| 102 | if not self.set_up_experiment_filespace(user, self.ops, |
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| 103 | pid, eid, tmpdir): |
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| 104 | return False |
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| 105 | |
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| 106 | # Put the file into a string to pass to emulab. |
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| 107 | try: |
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| 108 | tcl = "".join([ l for l in open(tclfile,"r")]) |
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| 109 | except EnvironmentError, e: |
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| 110 | self.log.error("Can't read %s: %s" % (tclfile, e)) |
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| 111 | return False |
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| 112 | |
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| 113 | # Stage the new configuration |
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| 114 | if not self.modify_exp(pid, eid, tcl): |
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| 115 | self.log.error("modify failed") |
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| 116 | return False |
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| 117 | |
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| 118 | if not self.swap_exp(pid, eid, 'in'): |
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| 119 | self.log.error("swap in failed") |
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| 120 | return False |
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| 121 | # Everything has gone OK. |
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| 122 | self.get_mapping(pid,eid) |
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| 123 | return True |
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| 124 | |
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| 125 | class stop_segment(ssh_emulab_segment, xmlrpc_emulab_segment): |
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| 126 | def __init__(self, log=None, keyfile=None, debug=False, boss=None, |
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| 127 | ops=None, cert=None): |
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| 128 | ssh_emulab_segment.__init__(self, log=log, keyfile=keyfile, debug=debug) |
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| 129 | xmlrpc_emulab_segment.__init__(self, boss=boss, ops=ops, cert=cert) |
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| 130 | |
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| 131 | def __call__(self, parent, user, pid, eid, gid=None, terminate=False): |
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| 132 | """ |
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| 133 | Stop a sub experiment by calling swapexp on the federant |
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| 134 | """ |
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| 135 | |
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| 136 | self.log.info("[stop_segment]: Stopping %s" % eid) |
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| 137 | rv = False |
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| 138 | try: |
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| 139 | # Clean out tar files: we've gone over quota in the past |
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| 140 | self.ssh_cmd(user, self.ops, |
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| 141 | "rm -rf /proj/%s/software/%s" % (pid, eid)) |
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| 142 | rv = self.swap_exp(pid, eid, 'out') |
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| 143 | if terminate: |
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| 144 | rv = self.terminate_exp(pid, eid) |
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| 145 | except self.cmd_timeout: |
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| 146 | rv = False |
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| 147 | return rv |
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| 148 | |
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| 149 | class info_segment(ssh_emulab_segment, xmlrpc_emulab_segment): |
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| 150 | def __init__(self, log=None, keyfile=None, debug=False, boss=None, |
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| 151 | ops=None, cert=None): |
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| 152 | ssh_emulab_segment.__init__(self, log=log, keyfile=keyfile, debug=debug) |
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| 153 | xmlrpc_emulab_segment.__init__(self, boss=boss, ops=ops, cert=cert) |
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| 154 | |
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| 155 | def __call__(self, parent, user, pid, eid): |
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| 156 | self.log.info("[info_segment]: Getting info from %s" % eid) |
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| 157 | self.get_mapping(pid,eid) |
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| 158 | return True |
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| 159 | |
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| 160 | class operation_segment(ssh_emulab_segment, xmlrpc_emulab_segment): |
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| 161 | def __init__(self, log=None, keyfile=None, debug=False, boss=None, |
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| 162 | ops=None, cert=None): |
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| 163 | ssh_emulab_segment.__init__(self, log=log, keyfile=keyfile, debug=debug) |
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| 164 | xmlrpc_emulab_segment.__init__(self, boss=boss, ops=ops, cert=cert) |
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| 165 | |
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| 166 | def __call__(self, parent, op, targets, param, top): |
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| 167 | for l, p in targets.items(): |
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| 168 | self.log.info("[operation_segment]: Calling op %s on %s(%s)" % \ |
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| 169 | (op, l,p)) |
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| 170 | self.do_operation(op, l, p, param, top) |
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| 171 | return True |
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