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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