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 | ops=None, cert=None): |
---|
21 | ssh_emulab_segment.__init__(self, log=log, keyfile=keyfile, debug=debug) |
---|
22 | xmlrpc_emulab_segment.__init__(self, boss=boss, ops=ops, 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 | |
---|
49 | # Set umask to 007. Since we are operating |
---|
50 | # within /proj, we want to permit all proj users |
---|
51 | # read and write. This is especially necessary |
---|
52 | # since creating directory hierarchy (mkdir -p). |
---|
53 | print >>scriptfile, "umask 007" |
---|
54 | print >>scriptfile, "/bin/rm -rf %s" % proj_dir |
---|
55 | # Clear and create the software directory |
---|
56 | print >>scriptfile, "/bin/rm -rf %s/*" % softdir |
---|
57 | print >>scriptfile, 'mkdir -p %s' % proj_dir |
---|
58 | if os.path.isdir(lsoftdir): |
---|
59 | print >>scriptfile, 'mkdir -p %s' % softdir |
---|
60 | print >>scriptfile, 'chmod 0770 %s' % softdir |
---|
61 | print >>scriptfile, "rm -f %s" % scriptbase |
---|
62 | scriptfile.close() |
---|
63 | |
---|
64 | # Move the script to the remote machine |
---|
65 | # XXX: could collide tempfile names on the remote host |
---|
66 | if self.scp_file(scriptname, user, host, scriptbase): |
---|
67 | os.remove(scriptname) |
---|
68 | else: |
---|
69 | return False |
---|
70 | |
---|
71 | # Execute the script (and the script's last line deletes it) |
---|
72 | if not self.ssh_cmd(user, host, "sh -x %s" % scriptbase): |
---|
73 | return False |
---|
74 | |
---|
75 | for f in os.listdir(tmpdir): |
---|
76 | if not os.path.isdir("%s/%s" % (tmpdir, f)): |
---|
77 | if not self.scp_file("%s/%s" % (tmpdir, f), user, host, |
---|
78 | "%s/%s" % (proj_dir, f)): |
---|
79 | return False |
---|
80 | if os.path.isdir(lsoftdir): |
---|
81 | for f in os.listdir(lsoftdir): |
---|
82 | if not os.path.isdir("%s/%s" % (lsoftdir, f)): |
---|
83 | if not self.scp_file("%s/%s" % (lsoftdir, f), |
---|
84 | user, host, "%s/%s" % (softdir, f)): |
---|
85 | return False |
---|
86 | return True |
---|
87 | |
---|
88 | |
---|
89 | def __call__(self, parent, eid, pid, user, tclfile, tmpdir, timeout=0, |
---|
90 | gid=None): |
---|
91 | """ |
---|
92 | Start a sub-experiment on a federant. |
---|
93 | |
---|
94 | Get the current state, and terminate the experiment if it exists. The |
---|
95 | group membership of the experiment is difficult to determine or change, |
---|
96 | so start with a clean slate. Create a new one and ship data |
---|
97 | and configs and start the experiment. There are small ordering |
---|
98 | differences based on the initial state of the sub-experiment. |
---|
99 | """ |
---|
100 | |
---|
101 | state = self.get_state(pid, eid) |
---|
102 | |
---|
103 | if state != 'none': |
---|
104 | self.terminate_exp(pid, eid) |
---|
105 | |
---|
106 | if not self.make_null_experiment(pid, eid, tmpdir, gid): |
---|
107 | return False |
---|
108 | |
---|
109 | if not self.set_up_experiment_filespace(user, self.ops, |
---|
110 | pid, eid, tmpdir): |
---|
111 | return False |
---|
112 | |
---|
113 | # Put the file into a string to pass to emulab. |
---|
114 | try: |
---|
115 | tcl = "".join([ l for l in open(tclfile,"r")]) |
---|
116 | except EnvironmentError, e: |
---|
117 | self.log.error("Can't read %s: %s" % (tclfile, e)) |
---|
118 | return False |
---|
119 | |
---|
120 | # Stage the new configuration |
---|
121 | if not self.modify_exp(pid, eid, tcl): |
---|
122 | self.log.error("modify failed") |
---|
123 | return False |
---|
124 | |
---|
125 | if not self.swap_exp(pid, eid, 'in'): |
---|
126 | self.log.error("swap in failed") |
---|
127 | return False |
---|
128 | # Everything has gone OK. |
---|
129 | self.get_mapping(pid,eid) |
---|
130 | return True |
---|
131 | |
---|
132 | class stop_segment(ssh_emulab_segment, xmlrpc_emulab_segment): |
---|
133 | def __init__(self, log=None, keyfile=None, debug=False, boss=None, |
---|
134 | ops=None, cert=None): |
---|
135 | ssh_emulab_segment.__init__(self, log=log, keyfile=keyfile, debug=debug) |
---|
136 | xmlrpc_emulab_segment.__init__(self, boss=boss, ops=ops, cert=cert) |
---|
137 | |
---|
138 | def __call__(self, parent, user, pid, eid, gid=None, terminate=False): |
---|
139 | """ |
---|
140 | Stop a sub experiment by calling swapexp on the federant |
---|
141 | """ |
---|
142 | |
---|
143 | self.log.info("[stop_segment]: Stopping %s" % eid) |
---|
144 | rv = False |
---|
145 | try: |
---|
146 | # Clean out tar files: we've gone over quota in the past |
---|
147 | self.ssh_cmd(user, self.ops, |
---|
148 | "rm -rf /proj/%s/software/%s" % (pid, eid)) |
---|
149 | rv = self.swap_exp(pid, eid, 'out') |
---|
150 | if terminate: |
---|
151 | rv = self.terminate_exp(pid, eid) |
---|
152 | except self.cmd_timeout: |
---|
153 | rv = False |
---|
154 | return rv |
---|
155 | |
---|
156 | class info_segment(ssh_emulab_segment, xmlrpc_emulab_segment): |
---|
157 | def __init__(self, log=None, keyfile=None, debug=False, boss=None, |
---|
158 | ops=None, cert=None): |
---|
159 | ssh_emulab_segment.__init__(self, log=log, keyfile=keyfile, debug=debug) |
---|
160 | xmlrpc_emulab_segment.__init__(self, boss=boss, ops=ops, cert=cert) |
---|
161 | |
---|
162 | def __call__(self, parent, user, pid, eid): |
---|
163 | self.log.info("[info_segment]: Getting info from %s" % eid) |
---|
164 | self.get_mapping(pid,eid) |
---|
165 | return True |
---|
166 | |
---|
167 | class operation_segment(ssh_emulab_segment, xmlrpc_emulab_segment): |
---|
168 | def __init__(self, log=None, keyfile=None, debug=False, boss=None, |
---|
169 | ops=None, cert=None): |
---|
170 | ssh_emulab_segment.__init__(self, log=log, keyfile=keyfile, debug=debug) |
---|
171 | xmlrpc_emulab_segment.__init__(self, boss=boss, ops=ops, cert=cert) |
---|
172 | |
---|
173 | def __call__(self, parent, op, targets, param, top): |
---|
174 | for l, p in targets.items(): |
---|
175 | self.log.info("[operation_segment]: Calling op %s on %s(%s)" % \ |
---|
176 | (op, l,p)) |
---|
177 | self.do_operation(op, l, p, param, top) |
---|
178 | return True |
---|