source: fedd/federation/local_emulab_segment.py @ c167378

compt_changesinfo-ops
Last change on this file since c167378 was c167378, checked in by Ted Faber <faber@…>, 8 years ago

Restore mnemonic names and allow seer_master experiments in groups. NB:
all existing experiments that are reused on DETER get deleted now.
Don't save anything in there.

  • Property mode set to 100644
File size: 3.6 KB
Line 
1#!/usr/local/bin/python
2
3import sys, os
4import re
5
6import tempfile
7import subprocess
8import logging 
9import time
10import signal
11
12import util
13
14from local_segment import local_segment
15from federation.emulab_segment import emulab_segment
16
17
18class start_segment(local_segment, emulab_segment):
19    def __init__(self, log=None, keyfile=None, debug=False, boss=None,
20            cert=None):
21        local_segment.__init__(self, log=log, keyfile=keyfile, debug=debug)
22        emulab_segment.__init__(self, boss=boss, cert=cert)
23        self.node = { }
24
25    def set_up_experiment_filespace(self, pid, eid, tmpdir):
26        # Configuration directories on this machine
27        proj_dir = "/proj/%s/exp/%s/tmp" % (pid, eid)
28        softdir = "/proj/%s/software/%s" % (pid, eid)
29        # Softwrae staging directory software dir
30        lsoftdir = "%s/software" % tmpdir
31
32        # Set up the experiment's file space
33        if not self.cmd_with_timeout("/bin/rm -rf %s" % proj_dir):
34            return False
35        # Clear and create the software and configuration directories
36        if not self.cmd_with_timeout("/bin/rm -rf %s/*" % softdir):
37            return False
38        if not self.cmd_with_timeout('mkdir -p %s' % proj_dir):
39            return False
40        if os.path.isdir(lsoftdir):
41            if not self.cmd_with_timeout('mkdir -p %s' % softdir):
42                return False
43
44        try:
45            for f in os.listdir(tmpdir):
46                if not os.path.isdir("%s/%s" % (tmpdir, f)):
47                    self.copy_file("%s/%s" % (tmpdir, f), 
48                            "%s/%s" % (proj_dir, f))
49            if os.path.isdir(lsoftdir):
50                for f in os.listdir(lsoftdir):
51                    if not os.path.isdir("%s/%s" % (lsoftdir, f)):
52                        self.copy_file("%s/%s" % (lsoftdir, f), 
53                                "%s/%s" % (softdir, f))
54        except EnvironmentError, e:
55            self.log.error("Error copying file: %s" %e)
56            return False
57
58        return True
59
60    def __call__(self, parent, eid, pid, user, tclfile, tmpdir, timeout=0, 
61            gid=None):
62        """
63        Start a sub-experiment on a federant.
64
65        Get the current state, and terminate the experiment if it exists. The
66        group membership of the experiment is difficult to determine or change,
67        so start with a clean slate.  Create a new one and ship data
68        and configs and start the experiment.  There are small ordering
69        differences based on the initial state of the sub-experiment.
70        """
71
72        state = self.get_state(pid, eid)
73
74        if state != 'none':
75            self.terminate_exp(pid, eid)
76
77        if not self.make_null_experiment(pid, eid, tmpdir, gid):
78            return False
79
80        if not self.set_up_experiment_filespace(pid, eid, tmpdir):
81            return False
82
83        # Put the file into a string to pass to emulab.
84        try:
85            tcl = "".join([ l for l in open(tclfile,"r")])
86        except EnvironmentError, e:
87            self.log.error("Can't read %s: %s" % (tclfile, e))
88            return False
89       
90        # Stage the new configuration
91        if not self.modify_exp(pid, eid, tcl):
92            self.log.error("modify failed")
93            return False
94
95        if not self.swap_exp(pid, eid, 'in'):
96            self.log.error("swap in failed")
97            return False
98        # Everything has gone OK.
99        self.get_mapping(pid,eid)
100        return True
101
102class stop_segment(local_segment, emulab_segment):
103    def __init__(self, log=None, keyfile=None, debug=False, boss=None, 
104            cert=None):
105        local_segment.__init__(self, log=log, keyfile=keyfile, debug=debug)
106        emulab_segment.__init__(self, boss=boss, cert=cert)
107
108    def __call__(self, parent, user, pid, eid, gid=None, terminate=False):
109        """
110        Stop a sub experiment by calling swapexp on the federant
111        """
112
113        self.log.info("[stop_segment]: Stopping %s" % eid)
114        rv = False
115        try:
116            # Clean out tar files: we've gone over quota in the past
117            self.cmd_with_timeout("rm -rf /proj/%s/software/%s" % (pid, eid))
118            rv = self.swap_exp(pid, eid, 'out')
119            if terminate:
120                rv = self.terminate_exp(pid, eid)
121        except self.cmd_timeout:
122            rv = False
123        return rv
124
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