| 1 | #!/usr/local/bin/python |
|---|
| 2 | |
|---|
| 3 | import sys, os |
|---|
| 4 | import re |
|---|
| 5 | |
|---|
| 6 | import tempfile |
|---|
| 7 | import subprocess |
|---|
| 8 | import logging |
|---|
| 9 | import time |
|---|
| 10 | import signal |
|---|
| 11 | |
|---|
| 12 | import util |
|---|
| 13 | |
|---|
| 14 | from ssh_emulab_segment import ssh_emulab_segment |
|---|
| 15 | from xmlrpc_emulab_segment import xmlrpc_emulab_segment |
|---|
| 16 | |
|---|
| 17 | |
|---|
| 18 | class start_segment(ssh_emulab_segment, xmlrpc_emulab_segment): |
|---|
| 19 | def __init__(self, log=None, keyfile=None, debug=False, boss=None, |
|---|
| 20 | cert=None): |
|---|
| 21 | ssh_emulab_segment.__init__(self, log=log, keyfile=keyfile, debug=debug) |
|---|
| 22 | xmlrpc_emulab_segment.__init__(self, boss=boss, cert=cert) |
|---|
| 23 | |
|---|
| 24 | def set_up_experiment_filespace(self, user, host, pid, eid, tmpdir): |
|---|
| 25 | """ |
|---|
| 26 | Send all the software and configuration files into the experiment's |
|---|
| 27 | file space. To reduce the number of ssh connections, we script many |
|---|
| 28 | changes and execute the script. |
|---|
| 29 | """ |
|---|
| 30 | # Configuration directories on the remote machine |
|---|
| 31 | proj_dir = "/proj/%s/exp/%s/tmp" % (pid, eid) |
|---|
| 32 | softdir = "/proj/%s/software/%s" % (pid, eid) |
|---|
| 33 | # Local software dir |
|---|
| 34 | lsoftdir = "%s/software" % tmpdir |
|---|
| 35 | |
|---|
| 36 | # Open up a temporary file to contain a script for setting up the |
|---|
| 37 | # filespace for the new experiment. |
|---|
| 38 | self.log.info("[start_segment]: creating script file") |
|---|
| 39 | try: |
|---|
| 40 | sf, scriptname = tempfile.mkstemp() |
|---|
| 41 | scriptfile = os.fdopen(sf, 'w') |
|---|
| 42 | except EnvironmentError: |
|---|
| 43 | return False |
|---|
| 44 | |
|---|
| 45 | scriptbase = os.path.basename(scriptname) |
|---|
| 46 | |
|---|
| 47 | # Script the filesystem changes |
|---|
| 48 | print >>scriptfile, "/bin/rm -rf %s" % proj_dir |
|---|
| 49 | # Clear and create the software directory |
|---|
| 50 | print >>scriptfile, "/bin/rm -rf %s/*" % softdir |
|---|
| 51 | print >>scriptfile, 'mkdir -p %s' % proj_dir |
|---|
| 52 | if os.path.isdir(lsoftdir): |
|---|
| 53 | print >>scriptfile, 'mkdir -p %s' % softdir |
|---|
| 54 | print >>scriptfile, "rm -f %s" % scriptbase |
|---|
| 55 | scriptfile.close() |
|---|
| 56 | |
|---|
| 57 | # Move the script to the remote machine |
|---|
| 58 | # XXX: could collide tempfile names on the remote host |
|---|
| 59 | if self.scp_file(scriptname, user, host, scriptbase): |
|---|
| 60 | os.remove(scriptname) |
|---|
| 61 | else: |
|---|
| 62 | return False |
|---|
| 63 | |
|---|
| 64 | # Execute the script (and the script's last line deletes it) |
|---|
| 65 | if not self.ssh_cmd(user, host, "sh -x %s" % scriptbase): |
|---|
| 66 | return False |
|---|
| 67 | |
|---|
| 68 | for f in os.listdir(tmpdir): |
|---|
| 69 | if not os.path.isdir("%s/%s" % (tmpdir, f)): |
|---|
| 70 | if not self.scp_file("%s/%s" % (tmpdir, f), user, host, |
|---|
| 71 | "%s/%s" % (proj_dir, f)): |
|---|
| 72 | return False |
|---|
| 73 | if os.path.isdir(lsoftdir): |
|---|
| 74 | for f in os.listdir(lsoftdir): |
|---|
| 75 | if not os.path.isdir("%s/%s" % (lsoftdir, f)): |
|---|
| 76 | if not self.scp_file("%s/%s" % (lsoftdir, f), |
|---|
| 77 | user, host, "%s/%s" % (softdir, f)): |
|---|
| 78 | return False |
|---|
| 79 | return True |
|---|
| 80 | |
|---|
| 81 | |
|---|
| 82 | def __call__(self, parent, eid, pid, user, tclfile, tmpdir, timeout=0, |
|---|
| 83 | gid=None): |
|---|
| 84 | """ |
|---|
| 85 | Start a sub-experiment on a federant. |
|---|
| 86 | |
|---|
| 87 | Get the current state, and terminate the experiment if it exists. The |
|---|
| 88 | group membership of the experiment is difficult to determine or change, |
|---|
| 89 | so start with a clean slate. Create a new one and ship data |
|---|
| 90 | and configs and start the experiment. There are small ordering |
|---|
| 91 | differences based on the initial state of the sub-experiment. |
|---|
| 92 | """ |
|---|
| 93 | |
|---|
| 94 | state = self.get_state(pid, eid) |
|---|
| 95 | |
|---|
| 96 | if state != 'none': |
|---|
| 97 | self.terminate_exp(pid, eid) |
|---|
| 98 | |
|---|
| 99 | if not self.make_null_experiment(pid, eid, tmpdir, gid): |
|---|
| 100 | return False |
|---|
| 101 | |
|---|
| 102 | if not self.set_up_experiment_filespace(pid, eid, tmpdir): |
|---|
| 103 | return False |
|---|
| 104 | |
|---|
| 105 | # Put the file into a string to pass to emulab. |
|---|
| 106 | try: |
|---|
| 107 | tcl = "".join([ l for l in open(tclfile,"r")]) |
|---|
| 108 | except EnvironmentError, e: |
|---|
| 109 | self.log.error("Can't read %s: %s" % (tclfile, e)) |
|---|
| 110 | return False |
|---|
| 111 | |
|---|
| 112 | # Stage the new configuration |
|---|
| 113 | if not self.modify_exp(pid, eid, tcl): |
|---|
| 114 | self.log.error("modify failed") |
|---|
| 115 | return False |
|---|
| 116 | |
|---|
| 117 | if not self.swap_exp(pid, eid, 'in'): |
|---|
| 118 | self.log.error("swap in failed") |
|---|
| 119 | return False |
|---|
| 120 | # Everything has gone OK. |
|---|
| 121 | self.get_mapping(pid,eid) |
|---|
| 122 | return True |
|---|
| 123 | |
|---|
| 124 | class stop_segment(local_segment, emulab_segment): |
|---|
| 125 | def __init__(self, log=None, keyfile=None, debug=False, boss=None, |
|---|
| 126 | cert=None): |
|---|
| 127 | local_segment.__init__(self, log=log, keyfile=keyfile, debug=debug) |
|---|
| 128 | emulab_segment.__init__(self, boss=boss, cert=cert) |
|---|
| 129 | |
|---|
| 130 | def __call__(self, parent, user, pid, eid, gid=None, terminate=False): |
|---|
| 131 | """ |
|---|
| 132 | Stop a sub experiment by calling swapexp on the federant |
|---|
| 133 | """ |
|---|
| 134 | |
|---|
| 135 | self.log.info("[stop_segment]: Stopping %s" % eid) |
|---|
| 136 | rv = False |
|---|
| 137 | try: |
|---|
| 138 | # Clean out tar files: we've gone over quota in the past |
|---|
| 139 | self.ssh_cmd("rm -rf /proj/%s/software/%s" % (pid, eid)) |
|---|
| 140 | rv = self.swap_exp(pid, eid, 'out') |
|---|
| 141 | if terminate: |
|---|
| 142 | rv = self.terminate_exp(pid, eid) |
|---|
| 143 | except self.cmd_timeout: |
|---|
| 144 | rv = False |
|---|
| 145 | return rv |
|---|
| 146 | |
|---|
| 147 | class info_segment(local_segment, emulab_segment): |
|---|
| 148 | def __init__(self, log=None, keyfile=None, debug=False, boss=None, |
|---|
| 149 | cert=None): |
|---|
| 150 | local_segment.__init__(self, log=log, keyfile=keyfile, debug=debug) |
|---|
| 151 | emulab_segment.__init__(self, boss=boss, cert=cert) |
|---|
| 152 | |
|---|
| 153 | def __call__(self, parent, user, pid, eid): |
|---|
| 154 | self.log.info("[info_segment]: Getting info from %s" % eid) |
|---|
| 155 | self.get_mapping(pid,eid) |
|---|
| 156 | return True |
|---|
| 157 | |
|---|
| 158 | class operation_segment(local_segment, emulab_segment): |
|---|
| 159 | def __init__(self, log=None, keyfile=None, debug=False, boss=None, |
|---|
| 160 | cert=None): |
|---|
| 161 | local_segment.__init__(self, log=log, keyfile=keyfile, debug=debug) |
|---|
| 162 | emulab_segment.__init__(self, boss=boss, cert=cert) |
|---|
| 163 | |
|---|
| 164 | def __call__(self, parent, op, targets, param, top): |
|---|
| 165 | for l, p in targets.items(): |
|---|
| 166 | self.log.info("[operation_segment]: Calling op %s on %s(%s)" % \ |
|---|
| 167 | (op, l,p)) |
|---|
| 168 | self.do_operation(op, l, p, param, top) |
|---|
| 169 | return True |
|---|
