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<h1>Source code for pylorax.logmonitor</h1><div class="highlight"><pre>
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<span class="c">#</span>
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<span class="c"># Copyright (C) 2011-2017 Red Hat, Inc.</span>
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<span class="c">#</span>
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<span class="c"># This program is free software; you can redistribute it and/or modify</span>
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<span class="c"># it under the terms of the GNU General Public License as published by</span>
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<span class="c"># the Free Software Foundation; either version 2 of the License, or</span>
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<span class="c"># (at your option) any later version.</span>
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<span class="c">#</span>
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<span class="c"># This program is distributed in the hope that it will be useful,</span>
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<span class="c"># but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
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<span class="c"># MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span>
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<span class="c"># GNU General Public License for more details.</span>
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<span class="c">#</span>
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<span class="c"># You should have received a copy of the GNU General Public License</span>
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<span class="c"># along with this program. If not, see <http://www.gnu.org/licenses/>.</span>
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<span class="c">#</span>
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<span class="kn">import</span> <span class="nn">re</span>
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<span class="kn">import</span> <span class="nn">socket</span>
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<span class="kn">import</span> <span class="nn">SocketServer</span>
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<span class="kn">import</span> <span class="nn">threading</span>
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<div class="viewcode-block" id="LogRequestHandler"><a class="viewcode-back" href="../../pylorax.html#pylorax.logmonitor.LogRequestHandler">[docs]</a><span class="k">class</span> <span class="nc">LogRequestHandler</span><span class="p">(</span><span class="n">SocketServer</span><span class="o">.</span><span class="n">BaseRequestHandler</span><span class="p">):</span>
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<span class="sd">"""</span>
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<span class="sd"> Handle monitoring and saving the logfiles from the virtual install</span>
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<span class="sd"> """</span>
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<div class="viewcode-block" id="LogRequestHandler.setup"><a class="viewcode-back" href="../../pylorax.html#pylorax.logmonitor.LogRequestHandler.setup">[docs]</a> <span class="k">def</span> <span class="nf">setup</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
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<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">server</span><span class="o">.</span><span class="n">log_path</span><span class="p">:</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">fp</span> <span class="o">=</span> <span class="nb">open</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">server</span><span class="o">.</span><span class="n">log_path</span><span class="p">,</span> <span class="s">"w"</span><span class="p">)</span>
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<span class="k">else</span><span class="p">:</span>
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<span class="k">print</span> <span class="s">"no log_path specified"</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">request</span><span class="o">.</span><span class="n">settimeout</span><span class="p">(</span><span class="mi">10</span><span class="p">)</span>
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</div>
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<div class="viewcode-block" id="LogRequestHandler.handle"><a class="viewcode-back" href="../../pylorax.html#pylorax.logmonitor.LogRequestHandler.handle">[docs]</a> <span class="k">def</span> <span class="nf">handle</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
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<span class="sd">"""</span>
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<span class="sd"> Handle writing incoming data to a logfile and</span>
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<span class="sd"> checking the logs for any Tracebacks or other errors that indicate</span>
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<span class="sd"> that the install failed.</span>
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<span class="sd"> """</span>
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<span class="n">line</span> <span class="o">=</span> <span class="s">""</span>
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<span class="k">while</span> <span class="bp">True</span><span class="p">:</span>
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<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">server</span><span class="o">.</span><span class="n">kill</span><span class="p">:</span>
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<span class="k">break</span>
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<span class="k">try</span><span class="p">:</span>
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<span class="n">data</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">request</span><span class="o">.</span><span class="n">recv</span><span class="p">(</span><span class="mi">4096</span><span class="p">)</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">fp</span><span class="o">.</span><span class="n">write</span><span class="p">(</span><span class="n">data</span><span class="p">)</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">fp</span><span class="o">.</span><span class="n">flush</span><span class="p">()</span>
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<span class="c"># check the data for errors and set error flag</span>
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<span class="c"># need to assemble it into lines so we can test for the error</span>
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<span class="c"># string.</span>
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<span class="k">while</span> <span class="n">data</span><span class="p">:</span>
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<span class="n">more</span> <span class="o">=</span> <span class="n">data</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="s">"</span><span class="se">\n</span><span class="s">"</span><span class="p">,</span> <span class="mi">1</span><span class="p">)</span>
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<span class="n">line</span> <span class="o">+=</span> <span class="n">more</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
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<span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">more</span><span class="p">)</span> <span class="o">></span> <span class="mi">1</span><span class="p">:</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">iserror</span><span class="p">(</span><span class="n">line</span><span class="p">)</span>
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<span class="n">line</span> <span class="o">=</span> <span class="s">""</span>
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<span class="n">data</span> <span class="o">=</span> <span class="n">more</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span>
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<span class="k">else</span><span class="p">:</span>
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<span class="n">data</span> <span class="o">=</span> <span class="bp">None</span>
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<span class="k">except</span> <span class="n">socket</span><span class="o">.</span><span class="n">timeout</span><span class="p">:</span>
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<span class="k">pass</span>
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<span class="k">except</span> <span class="ne">Exception</span><span class="p">:</span>
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<span class="k">break</span>
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</div>
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<div class="viewcode-block" id="LogRequestHandler.finish"><a class="viewcode-back" href="../../pylorax.html#pylorax.logmonitor.LogRequestHandler.finish">[docs]</a> <span class="k">def</span> <span class="nf">finish</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">fp</span><span class="o">.</span><span class="n">close</span><span class="p">()</span>
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</div>
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<div class="viewcode-block" id="LogRequestHandler.iserror"><a class="viewcode-back" href="../../pylorax.html#pylorax.logmonitor.LogRequestHandler.iserror">[docs]</a> <span class="k">def</span> <span class="nf">iserror</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">line</span><span class="p">):</span>
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<span class="sd">"""</span>
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<span class="sd"> Check a line to see if it contains an error indicating install failure</span>
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<span class="sd"> """</span>
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<span class="n">simple_tests</span> <span class="o">=</span> <span class="p">[</span><span class="s">"Traceback ("</span><span class="p">,</span>
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<span class="s">"Out of memory:"</span><span class="p">,</span>
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<span class="s">"Call Trace:"</span><span class="p">,</span>
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<span class="s">"insufficient disk space:"</span><span class="p">]</span>
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<span class="n">re_tests</span> <span class="o">=</span> <span class="p">[</span><span class="s">r"packaging: base repo .* not valid"</span><span class="p">]</span>
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<span class="k">for</span> <span class="n">t</span> <span class="ow">in</span> <span class="n">simple_tests</span><span class="p">:</span>
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<span class="k">if</span> <span class="n">line</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="n">t</span><span class="p">)</span> <span class="o">></span> <span class="o">-</span><span class="mi">1</span><span class="p">:</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">server</span><span class="o">.</span><span class="n">log_error</span> <span class="o">=</span> <span class="bp">True</span>
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<span class="k">return</span>
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<span class="k">for</span> <span class="n">t</span> <span class="ow">in</span> <span class="n">re_tests</span><span class="p">:</span>
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<span class="k">if</span> <span class="n">re</span><span class="o">.</span><span class="n">search</span><span class="p">(</span><span class="n">t</span><span class="p">,</span> <span class="n">line</span><span class="p">):</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">server</span><span class="o">.</span><span class="n">log_error</span> <span class="o">=</span> <span class="bp">True</span>
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<span class="k">return</span>
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</div></div>
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<div class="viewcode-block" id="LogServer"><a class="viewcode-back" href="../../pylorax.html#pylorax.logmonitor.LogServer">[docs]</a><span class="k">class</span> <span class="nc">LogServer</span><span class="p">(</span><span class="n">SocketServer</span><span class="o">.</span><span class="n">TCPServer</span><span class="p">):</span>
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<span class="sd">"""</span>
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<span class="sd"> Add path to logfile</span>
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<span class="sd"> Add log error flag</span>
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<span class="sd"> Add a kill switch</span>
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<span class="sd"> """</span>
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<span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">log_path</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">kill</span> <span class="o">=</span> <span class="bp">False</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">log_error</span> <span class="o">=</span> <span class="bp">False</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">log_path</span> <span class="o">=</span> <span class="n">log_path</span>
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<span class="n">SocketServer</span><span class="o">.</span><span class="n">TCPServer</span><span class="o">.</span><span class="n">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">)</span>
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<div class="viewcode-block" id="LogServer.log_check"><a class="viewcode-back" href="../../pylorax.html#pylorax.logmonitor.LogServer.log_check">[docs]</a> <span class="k">def</span> <span class="nf">log_check</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
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<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">log_error</span>
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</div></div>
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<div class="viewcode-block" id="LogMonitor"><a class="viewcode-back" href="../../pylorax.html#pylorax.logmonitor.LogMonitor">[docs]</a><span class="k">class</span> <span class="nc">LogMonitor</span><span class="p">(</span><span class="nb">object</span><span class="p">):</span>
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<span class="sd">"""</span>
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<span class="sd"> Contains all the stuff needed to setup a thread to listen to the logs</span>
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<span class="sd"> from the virtual install</span>
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<span class="sd"> """</span>
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<span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">log_path</span><span class="p">,</span> <span class="n">host</span><span class="o">=</span><span class="s">"localhost"</span><span class="p">,</span> <span class="n">port</span><span class="o">=</span><span class="mi">0</span><span class="p">):</span>
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<span class="sd">"""</span>
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<span class="sd"> Fire up the thread listening for logs</span>
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<span class="sd"> """</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">server</span> <span class="o">=</span> <span class="n">LogServer</span><span class="p">(</span><span class="n">log_path</span><span class="p">,</span> <span class="p">(</span><span class="n">host</span><span class="p">,</span> <span class="n">port</span><span class="p">),</span> <span class="n">LogRequestHandler</span><span class="p">)</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">host</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">port</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">server</span><span class="o">.</span><span class="n">server_address</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">log_path</span> <span class="o">=</span> <span class="n">log_path</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">server_thread</span> <span class="o">=</span> <span class="n">threading</span><span class="o">.</span><span class="n">Thread</span><span class="p">(</span><span class="n">target</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">server</span><span class="o">.</span><span class="n">handle_request</span><span class="p">)</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">server_thread</span><span class="o">.</span><span class="n">daemon</span> <span class="o">=</span> <span class="bp">True</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">server_thread</span><span class="o">.</span><span class="n">start</span><span class="p">()</span>
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<div class="viewcode-block" id="LogMonitor.shutdown"><a class="viewcode-back" href="../../pylorax.html#pylorax.logmonitor.LogMonitor.shutdown">[docs]</a> <span class="k">def</span> <span class="nf">shutdown</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">server</span><span class="o">.</span><span class="n">kill</span> <span class="o">=</span> <span class="bp">True</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">server_thread</span><span class="o">.</span><span class="n">join</span><span class="p">()</span></div></div>
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