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<h1>8. Troubleshooting</h1>
<ul>
<li><a href="#81-release-disk-space">8.1. Release Disk Space</a></li>
<li><a href="#82-activate-debug-mode-for-microservices-and-collect-logs">8.2. Activate DEBUG mode for microservices and collect logs</a></li>
<li><a href="#83-download-a-snapshot-of-the-context-database">8.3. Download a snapshot of the Context database</a></li>
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<h2 id="81-release-disk-space"><strong>8.1. Release Disk Space</strong></h2>
<p><strong>Page under construction.</strong></p>
<p>Clean images when your <code>/var/lib/docker</code> starts taking up too much space:</p>
<pre><code class="language-bash">docker system prune -a
</code></pre>
<h2 id="82-activate-debug-mode-for-microservices-and-collect-logs"><strong>8.2. Activate DEBUG mode for microservices and collect logs</strong></h2>
<p>In some cases might happen that some component is not working or reporting errors.
In those cases it makes sense to activate DEBUG mode on those components and collect the logs.</p>
<h3><u>Activate DEBUG mode in components</h3>
<p></u></p>
<p>Before deploying the TeraFlowSDN, in the <a href="https://labs.etsi.org/rep/tfs/controller/-/tree/master/manifests">manifests</a> folder, modify the appropriate files for the microservices to be inspected, e.g. <code>contextservice.yaml</code>, <code>deviceservice.yaml</code>, <code>serviceservice.yaml</code>, <code>pathcompservice.yaml</code>, and <code>nbiservice.yaml</code>, by changing environment variable <code>LOG_LEVEL</code> to <code>DEBUG</code>.</p>
<pre><code class="language-yaml">apiVersion: apps/v1
kind: Deployment
#...
spec:
# ...
template:
# ...
spec:
# ...
containers:
# ...
- name: server
# ...
env:
# ...
- name: LOG_LEVEL
value: "INFO" # change to "DEBUG"F
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# ...
</code></pre>
<h3><u>Redeploy TeraFlowSDN</h3>
<p></u></p>
<p>Redeploy TeraFlowSDN as usual using the example <code>my_deploy.sh</code> specifications or whatever file you created with your deploy specs.</p>
<pre><code class="language-bash">source my_deploy.sh
./deploy/all.sh
</code></pre>
<p>Wait for the deployment to finish.</p>
<h3><u>Use TeraFlowSDN</h3>
<p></u></p>
<p>Do whatever actions you were testing and were missbehaving, such as onboarding a topology, creating a connectivity service, etc.</p>
<h3><u>Collect log files</h3>
<p></u></p>
<p>A number of helper scripts, named as <code>show_logs_<component>.sh</code>, are provided to facilitate log collection in the <a href="https://labs.etsi.org/rep/tfs/controller/-/tree/master/scripts">scripts</a> folder.
These scripts dump, by default, the logs on the screen, but can be redirected to files when needed.</p>
<p>In the following example, the logs of <code>context</code>, <code>device</code>, <code>service</code>, <code>pathcomp-frontend</code>, and <code>nbi</code> are stored in respective log files instead of the screen.</p>
<pre><code class="language-bash">cd ~/tfs-ctrl
./scripts/show_logs_context.sh > context.log
./scripts/show_logs_device.sh > device.log
./scripts/show_logs_service.sh > service.log
./scripts/show_logs_pathcomp_frontend.sh > pathcomp_frontend.log
./scripts/show_logs_nbi.sh > nbi.log
</code></pre>
<p>The resulting logs will be stored in the root TeraFlowSDN folder.</p>
<blockquote></blockquote>
<h2 id="83-download-a-snapshot-of-the-context-database"><strong>8.3. Download a snapshot of the Context database</strong></h2>
<p>In the WebUI, there is a tab named as <code>Debug</code> that you can use to interrogate the Context database.
In particular, there is a link named as <code>Dummy Contexts</code>. This link produces a JSON descriptor file containing all the contexts, topologies, devices, links, slices, services, connections, constraints, and configuration rules present in Context. The resulting file can be onboarded in a blank TeraFlowSDN instance for testing purposes.</p>
<p><strong>IMPORTANT</strong>: The Dummy Contexts feature might take few seconds to respond while it composes the reply.</p>
<p><strong>IMPORTANT</strong>: The produced file is labelled as <code>"dummy": true</code>; that means it is a snapshot of the database that can be loaded directly into Context. This means it does not pass through the Device/Service/Slice components to onboard the records, but it drops the records directly in Context. This is useful to investigate the content on the database when an issue arises.</p>
<p><strong>WARNING</strong>: The dump retrieves all the information in clear text! Remember to <strong>manually anonymize your sensitive data</strong> such as credentials, IP addresses, etc.</p>
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