1 | #!/usr/local/bin/python |
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2 | |
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3 | import logging |
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4 | import util |
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5 | |
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6 | from M2Crypto import SSL |
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7 | from M2Crypto.m2xmlrpclib import SSL_Transport |
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8 | from xmlrpclib import ServerProxy, dumps, loads, Fault, Error, Binary |
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9 | from M2Crypto.SSL import SSLError |
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10 | from M2Crypto.BIO import BIOError |
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11 | from socket import error as socket_error |
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12 | from socket import sslerror |
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13 | import httplib |
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14 | from federation.util import fedd_ssl_context |
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15 | from federation import service_error |
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16 | from federation.operation_status import operation_status |
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17 | |
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18 | class emulab_segment: |
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19 | def __init__(self, boss, cert): |
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20 | self.ctxt = fedd_ssl_context(my_cert=cert) |
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21 | self.ctxt.set_verify(SSL.verify_none, 10) |
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22 | self.boss = boss |
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23 | self.null = """ |
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24 | set ns [new Simulator] |
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25 | source tb_compat.tcl |
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26 | |
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27 | set a [$ns node] |
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28 | |
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29 | $ns rtproto Session |
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30 | $ns run |
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31 | """ |
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32 | self.log = getattr(self, 'log', None) |
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33 | self.debug = getattr(self, 'debug', False) |
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34 | self.node = { } |
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35 | self.status = [ ] |
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36 | |
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37 | def emulab_call(self, method, params): |
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38 | VERSION = 0.1 |
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39 | try: |
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40 | transport = SSL_Transport(self.ctxt) |
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41 | port = ServerProxy(self.boss, transport=transport) |
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42 | remote_method = getattr(port, method, None) |
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43 | if remote_method is not None: |
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44 | resp = remote_method(VERSION, params) |
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45 | else: |
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46 | raise service_error(service_error.internal, |
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47 | "Bad method: %s" % method) |
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48 | except socket_error, e: |
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49 | raise service_error(service_error.connect, |
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50 | "Cannot connect" % e) |
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51 | raise e |
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52 | except BIOError, e: |
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53 | if self.log: |
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54 | self.log.warn("BIO error: %s" % e) |
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55 | raise e |
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56 | except sslerror, e: |
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57 | if self.log: |
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58 | self.log.warn("SSL (socket) error: %s" % e) |
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59 | raise e |
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60 | except SSLError, e: |
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61 | if self.log: |
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62 | self.log.warn("SSL error: %s" % e) |
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63 | raise e |
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64 | except httplib.HTTPException, e: |
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65 | if self.log: |
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66 | self.log.warn("HTTP error: %s" % e) |
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67 | raise e |
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68 | except Fault, f: |
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69 | raise service_error(service_error.protocol, |
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70 | "Remote XMLRPC Fault: %s" % f) |
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71 | except Error, e: |
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72 | raise service_error(service_error.protocol, |
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73 | "Remote XMLRPC Fault: %s" % e) |
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74 | |
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75 | code = resp.get('code', -1) |
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76 | if code ==0: |
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77 | return (code, resp.get('value', None)) |
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78 | else: |
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79 | return (code, resp.get('output', None)) |
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80 | |
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81 | def get_state(self, pid, eid): |
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82 | """ |
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83 | Return the state of the experiment as reported by emulab |
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84 | """ |
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85 | |
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86 | if self.debug: |
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87 | state = 'swapped' |
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88 | else: |
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89 | params = { 'proj': pid, 'exp': eid } |
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90 | code, state = self.emulab_call('experiment.state', params) |
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91 | if code != 0: |
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92 | state = 'none' |
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93 | |
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94 | if self.log: |
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95 | self.log.debug("State is %s" % state) |
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96 | return state |
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97 | |
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98 | def make_null_experiment(self, pid, eid, tmpdir, gid=None): |
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99 | """ |
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100 | Create a null copy of the experiment so that we capture any logs there |
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101 | if the modify fails. Emulab software discards the logs from a failed |
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102 | startexp. |
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103 | """ |
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104 | |
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105 | if self.debug: |
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106 | if self.log: |
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107 | self.log.debug("[make_null_experiment]: " + \ |
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108 | "(debug) Creating experiment") |
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109 | return True |
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110 | else: |
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111 | params = { |
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112 | 'proj': pid, |
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113 | 'exp': eid, |
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114 | 'nsfilestr': self.null, |
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115 | 'batch': False, |
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116 | 'idleswap': 0, |
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117 | 'noidleswap_reason': 'Federated experiment', |
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118 | 'noswapin': True, |
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119 | 'wait': True |
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120 | } |
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121 | if gid is not None: |
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122 | params['group'] = gid |
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123 | if self.log: |
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124 | self.log.info("[make_null_experiment]: Creating experiment") |
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125 | code, value = self.emulab_call('experiment.startexp', params) |
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126 | |
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127 | if self.log: |
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128 | if code == 0: |
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129 | self.log.info('[make_null_experiment]: Create succeeded') |
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130 | else: |
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131 | self.log.error('[make_null_experiment]: Create failed: %s' \ |
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132 | % value) |
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133 | |
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134 | return code == 0 |
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135 | |
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136 | def swap_exp(self, pid, eid, direction='out', wait=True): |
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137 | """ |
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138 | Swap experiment in. |
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139 | """ |
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140 | if self.debug: |
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141 | if self.log: |
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142 | self.log.info("[swap_exp]: (debug) Swapping %s %s" % \ |
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143 | (eid, direction)) |
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144 | return True |
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145 | else: |
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146 | if self.log: |
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147 | self.log.info("[swap_exp]: Swapping %s %s" % (eid, direction)) |
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148 | params = { |
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149 | 'proj': pid, |
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150 | 'exp': eid, |
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151 | 'direction': direction, |
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152 | 'wait': wait, |
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153 | } |
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154 | code, value = self.emulab_call('experiment.swapexp', params) |
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155 | |
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156 | if self.log: |
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157 | if code == 0: self.log.info('[swap_exp]: Swap succeeded') |
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158 | else: self.log.error('[swap_exp]: Swap failed: %s' % value) |
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159 | |
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160 | return code == 0 |
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161 | |
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162 | def terminate_exp(self, pid, eid, wait=True): |
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163 | """ |
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164 | Completely terminate experiment |
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165 | """ |
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166 | if self.debug: |
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167 | if self.log: |
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168 | self.log.info("[swap_exp]: (debug) terminate %s" % eid) |
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169 | return True |
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170 | else: |
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171 | if self.log: |
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172 | self.log.info("[swap_exp]: Terminating %s" % eid) |
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173 | params = { |
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174 | 'proj': pid, |
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175 | 'exp': eid, |
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176 | 'wait': wait, |
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177 | } |
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178 | code, value = self.emulab_call('experiment.endexp', params) |
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179 | |
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180 | if self.log: |
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181 | if code == 0: self.log.info('[swap_exp]: Terminate succeeded') |
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182 | else: self.log.error('[swap_exp]: Terminate failed: %s' % value) |
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183 | |
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184 | return code == 0 |
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185 | |
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186 | def modify_exp(self, pid, eid, tcl, wait=True): |
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187 | if self.debug: |
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188 | self.log.info("[modify_exp]: (debug) Modifying %s" % eid) |
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189 | return True |
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190 | else: |
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191 | self.log.info("[modify_exp]: Modifying %s" % eid) |
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192 | params = { |
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193 | 'proj': pid, |
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194 | 'exp': eid, |
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195 | 'nsfilestr': tcl, |
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196 | 'wait': wait, |
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197 | 'reboot': True, |
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198 | 'restart_eventsys': True, |
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199 | } |
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200 | code, value = self.emulab_call('experiment.modify', params) |
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201 | if self.log: |
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202 | if code == 0: |
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203 | self.log.info('[modify_exp]: Modify succeeded') |
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204 | else: |
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205 | self.log.error('[modify_exp]: Modify failed: %s' \ |
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206 | % value) |
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207 | return code == 0 |
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208 | |
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209 | |
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210 | def get_mapping(self, pid, eid): |
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211 | """ |
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212 | Get the physical to virtual mapping from the expinfo command and save |
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213 | it in the self.map member. |
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214 | """ |
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215 | |
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216 | ev_ok = ('ISUP', 'ALWAYSUP' ) |
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217 | |
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218 | if self.debug: |
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219 | if self.log: |
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220 | self.log.info("[get_mapping] (debug) Generating mapping") |
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221 | return True |
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222 | else: |
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223 | if self.log: |
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224 | self.log.info("[get_mapping] Generating mapping") |
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225 | |
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226 | params = { |
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227 | 'proj': pid, |
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228 | 'exp': eid, |
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229 | 'aspect': 'mapping' |
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230 | } |
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231 | code, nodes = self.emulab_call('experiment.info', params) |
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232 | if code ==0: |
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233 | for k, v in nodes.items(): |
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234 | if v.get('erole', False) and 'pnode' in v: |
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235 | st = v.get('status', 'up') |
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236 | ev = v.get('eventstatus', 'ISUP') |
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237 | |
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238 | if st == 'up' and ev in ev_ok: st = 'active' |
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239 | else: st = 'failed' |
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240 | self.node[k] = (v['pnode'], st) |
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241 | if self.log: |
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242 | self.log.info("Mapping complete") |
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243 | return True |
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244 | else: |
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245 | raise service_error(service_error.internal, |
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246 | "Cannot get node mapping of segment:%s/%s" % (pid, eid)) |
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247 | |
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248 | def do_operation(self, op, lnode, pnode, params): |
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249 | """ |
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250 | Carry out operation on node in the given experiment. |
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251 | """ |
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252 | def get_param(params, name): |
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253 | if params is None: |
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254 | return None |
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255 | for d in params: |
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256 | if 'attribute' in d and d['attribute'] == name: |
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257 | return d.get('value', None) |
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258 | else: |
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259 | return None |
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260 | |
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261 | op = op.lower() |
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262 | |
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263 | if op == 'restore': |
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264 | state = get_param(params, 'state') |
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265 | if state is None: |
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266 | self.status.append(operation_status(lnode, |
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267 | operation_status.bad_param, 'No state to restore')) |
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268 | return False |
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269 | elif state == 'initial': |
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270 | self.status.append(operation_status(lnode, |
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271 | operation_status.unsupp, 'Image load unsupported')) |
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272 | return False |
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273 | elif state == 'boot': |
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274 | p = {'nodes': pnode, 'wait': False} |
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275 | code, result = self.emulab_call('node.reboot', p) |
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276 | if code == 0: |
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277 | self.status.append(operation_status(lnode, |
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278 | operation_status.success, 'rebooting')) |
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279 | return True |
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280 | else: |
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281 | self.status.append(operation_status(lnode, |
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282 | operation_status.federant, 'Error code: %d' % code)) |
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283 | return False |
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284 | else: |
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285 | self.status.append(operation_status(lnode, |
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286 | operation_status.bad_param, |
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287 | "Unsupported state %s" % state)) |
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288 | return False |
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289 | else: |
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290 | self.status.append(operation_status(lnode, operation_status.unsupp)) |
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291 | return False |
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292 | |
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