source: fedd/federation/containers_segment.py @ 187a8f9

Last change on this file since 187a8f9 was 5726f53, checked in by Ted Faber <faber@…>, 11 years ago

Lurking exceptionm name bug

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1#!/usr/local/bin/python
2
3import sys, os
4import re
5import os.path
6
7import tempfile
8import subprocess
9import logging 
10import time
11import signal
12
13import util
14
15from deter import topdl
16
17from ssh_emulab_segment import ssh_emulab_segment
18from xmlrpc_emulab_segment import xmlrpc_emulab_segment
19
20
21class start_segment(ssh_emulab_segment, xmlrpc_emulab_segment):
22    def __init__(self, log=None, keyfile=None, debug=False, boss=None,
23            ops=None, cert=None):
24        ssh_emulab_segment.__init__(self, log=log, keyfile=keyfile, debug=debug)
25        xmlrpc_emulab_segment.__init__(self, boss=boss, ops=ops, cert=cert)
26        # XXX: better way to work this...
27        self.containerize = '/share/containers-dev/containerize.py --config /share/containers-dev/site.conf %s %s %s'
28
29    def get_mapping(self, pid, eid):
30        """
31        Containers's info reporting is not sufficient to support this yet
32        """
33        pass
34
35    def set_up_experiment_filespace(self, user, host, pid, eid, tmpdir):
36        """
37        Send all the software and configuration files into the experiment's
38        file space.  To reduce the number of ssh connections, we script many
39        changes and execute the script.
40        """
41        # Configuration directories on the remote machine
42        proj_dir = "/proj/%s/exp/%s/tmp" % (pid, eid)
43        softdir = "/proj/%s/software/%s" % (pid, eid)
44        # Local software dir
45        lsoftdir = "%s/software" % tmpdir
46
47        # Open up a temporary file to contain a script for setting up the
48        # filespace for the new experiment.
49        self.log.info("[start_segment]: creating script file")
50        try:
51            sf, scriptname = tempfile.mkstemp()
52            scriptfile = os.fdopen(sf, 'w')
53        except EnvironmentError:
54            return False
55
56        scriptbase = os.path.basename(scriptname)
57
58        # Script the filesystem changes
59        print >>scriptfile, "/bin/rm -rf %s" % proj_dir
60        # Clear and create the software directory
61        print >>scriptfile, "/bin/rm -rf %s/*" % softdir
62        print >>scriptfile, 'mkdir -p %s' % proj_dir
63        if os.path.isdir(lsoftdir):
64            print >>scriptfile, 'mkdir -p %s' % softdir
65        print >>scriptfile, "rm -f %s" % scriptbase
66        scriptfile.close()
67
68        # Move the script to the remote machine
69        # XXX: could collide tempfile names on the remote host
70        if self.scp_file(scriptname, user, host, scriptbase):
71            os.remove(scriptname)
72        else:
73            return False
74
75        # Execute the script (and the script's last line deletes it)
76        if not self.ssh_cmd(user, host, "sh -x %s" % scriptbase):
77            return False
78
79        for f in os.listdir(tmpdir):
80            if not os.path.isdir("%s/%s" % (tmpdir, f)):
81                if not self.scp_file("%s/%s" % (tmpdir, f), user, host,
82                        "%s/%s" % (proj_dir, f)):
83                    return False
84        if os.path.isdir(lsoftdir):
85            for f in os.listdir(lsoftdir):
86                if not os.path.isdir("%s/%s" % (lsoftdir, f)):
87                    if not self.scp_file("%s/%s" % (lsoftdir, f), 
88                            user, host, "%s/%s" % (softdir, f)):
89                        return False
90        return True
91
92
93    def __call__(self, parent, eid, pid, user, tclfile, tmpdir, timeout=0, 
94            gid=None):
95        """
96        Start a sub-experiment on a federant.
97
98        Get the current state, and terminate the experiment if it exists. The
99        group membership of the experiment is difficult to determine or change,
100        so start with a clean slate.  Create a new one and ship data
101        and configs and start the experiment.  There are small ordering
102        differences based on the initial state of the sub-experiment.
103        """
104
105        # containers listens to the filename extension.  tclfile here is really
106        # topdl, but we'll move it to a different filename.
107        if tclfile.endswith('.tcl'):
108            topdlfile = os.path.join(tmpdir, 'experiment.xml')
109            self.ssh_cmd(user, self.ops, 'mv %s %s' % (tclfile, topdlfile))
110        else:
111            topdlfile = tclfile
112
113
114        state = self.get_state(pid, eid)
115
116        if state != 'none':
117            self.terminate_exp(pid, eid)
118
119        cmd = self.containerize  %  (pid, eid, topdlfile)
120
121        if not self.ssh_cmd(user, self.ops, cmd):
122            self.log.error("Cannot create containers experiment")
123            return False
124
125        if not self.set_up_experiment_filespace(user, self.ops, 
126                pid, eid, tmpdir):
127            return False
128
129        if not self.swap_exp(pid, eid, 'in'):
130            self.log.error("swap in failed")
131            return False
132        # Everything has gone OK.
133        self.get_mapping(pid,eid)
134        return True
135
136class stop_segment(ssh_emulab_segment, xmlrpc_emulab_segment):
137    def __init__(self, log=None, keyfile=None, debug=False, boss=None, 
138            ops=None, cert=None):
139        ssh_emulab_segment.__init__(self, log=log, keyfile=keyfile, debug=debug)
140        xmlrpc_emulab_segment.__init__(self, boss=boss, ops=ops, cert=cert)
141
142    def __call__(self, parent, user, pid, eid, gid=None, terminate=False):
143        """
144        Stop a sub experiment by calling swapexp on the federant
145        """
146
147        self.log.info("[stop_segment]: Stopping %s" % eid)
148        rv = False
149        try:
150            # Clean out tar files: we've gone over quota in the past
151            self.ssh_cmd(user, self.ops, 
152                    "rm -rf /proj/%s/software/%s" % (pid, eid))
153            rv = self.swap_exp(pid, eid, 'out')
154            if terminate:
155                rv = self.terminate_exp(pid, eid)
156        except self.ssh_cmd_timeout:
157            rv = False
158        return rv
159
160class info_segment(ssh_emulab_segment, xmlrpc_emulab_segment):
161    def __init__(self, log=None, keyfile=None, debug=False, boss=None, 
162            ops=None, cert=None):
163        ssh_emulab_segment.__init__(self, log=log, keyfile=keyfile, debug=debug)
164        xmlrpc_emulab_segment.__init__(self, boss=boss, ops=ops, cert=cert)
165
166    def get_mapping(self, pid, eid):
167        """
168        Benito's info reporting is not sufficient to support this yet
169        """
170        pass
171
172    def __call__(self, parent, user, pid, eid):
173        self.log.info("[info_segment]: Getting info from %s" % eid)
174        self.get_mapping(pid,eid)
175        return True
176
177class operation_segment(ssh_emulab_segment, xmlrpc_emulab_segment):
178    def __init__(self, log=None, keyfile=None, debug=False, boss=None, 
179            ops=None, cert=None):
180        ssh_emulab_segment.__init__(self, log=log, keyfile=keyfile, debug=debug)
181        xmlrpc_emulab_segment.__init__(self, boss=boss, ops=ops, cert=cert)
182
183    def __call__(self, parent, op, targets, param, top):
184        self.status.append('operations not yet supported')
185        return True
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