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<li class="md-nav__item">
<a href="#ongoing-ingestion-n8n" class="md-nav__link">
<span class="md-ellipsis">
Ongoing ingestion (n8n)
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#paths-available-on-ct-104" class="md-nav__link">
<span class="md-ellipsis">
Paths available on CT 104
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#status" class="md-nav__link">
<span class="md-ellipsis">
Status
</span>
</a>
</li>
</ul>
</nav>
</div>
</div>
</div>
<div class="md-content" data-md-component="content">
<article class="md-content__inner md-typeset">
<h1 id="ingest-pipeline-filesystem-scan">Ingest Pipeline — Filesystem Scan<a class="headerlink" href="#ingest-pipeline-filesystem-scan" title="Permanent link">&para;</a></h1>
<p>One-shot pipeline that crawls a directory, converts documents to text, embeds them via
the nomic service, and stores them in Qdrant. Run it manually against any mounted path.</p>
<h2 id="architecture">Architecture<a class="headerlink" href="#architecture" title="Permanent link">&para;</a></h2>
<div class="highlight"><pre><span></span><code><a id="__codelineno-0-1" name="__codelineno-0-1" href="#__codelineno-0-1"></a> ┌─────────────────────────┐
<a id="__codelineno-0-2" name="__codelineno-0-2" href="#__codelineno-0-2"></a> │ ingest.py --path /... │ runs on CT 104 (has direct access to ai-internal network)
<a id="__codelineno-0-3" name="__codelineno-0-3" href="#__codelineno-0-3"></a> └──────────┬──────────────┘
<a id="__codelineno-0-4" name="__codelineno-0-4" href="#__codelineno-0-4"></a> │ per file
<a id="__codelineno-0-5" name="__codelineno-0-5" href="#__codelineno-0-5"></a> ▼
<a id="__codelineno-0-6" name="__codelineno-0-6" href="#__codelineno-0-6"></a> ┌────────────────────────────────────────────────────────────────┐
<a id="__codelineno-0-7" name="__codelineno-0-7" href="#__codelineno-0-7"></a> │ 1. File scanner glob recursively, filter by ext │
<a id="__codelineno-0-8" name="__codelineno-0-8" href="#__codelineno-0-8"></a> │ 2. Change detection sha256(path + mtime) → skip if seen │
<a id="__codelineno-0-9" name="__codelineno-0-9" href="#__codelineno-0-9"></a> │ 3. Docling converter POST http://docling:5001/convert │
<a id="__codelineno-0-10" name="__codelineno-0-10" href="#__codelineno-0-10"></a> │ (PDF/DOCX/PPTX/XLSX/HTML → Markdown) │
<a id="__codelineno-0-11" name="__codelineno-0-11" href="#__codelineno-0-11"></a> │ Plain text/Markdown read directly │
<a id="__codelineno-0-12" name="__codelineno-0-12" href="#__codelineno-0-12"></a> │ Images (jpg/png/...) send to nomic vision endpoint │
<a id="__codelineno-0-13" name="__codelineno-0-13" href="#__codelineno-0-13"></a> │ 4. Chunker split Markdown by headers + size │
<a id="__codelineno-0-14" name="__codelineno-0-14" href="#__codelineno-0-14"></a> │ chunk_size=1200 overlap=150 (matches OWUI RAG config) │
<a id="__codelineno-0-15" name="__codelineno-0-15" href="#__codelineno-0-15"></a> │ 5. Nomic embedder POST http://nomic:80/v1/embeddings │
<a id="__codelineno-0-16" name="__codelineno-0-16" href="#__codelineno-0-16"></a> │ text chunks → 768d images → 768d (same space!) │
<a id="__codelineno-0-17" name="__codelineno-0-17" href="#__codelineno-0-17"></a> │ 6. Qdrant upsert collection `documents`, named vectors │
<a id="__codelineno-0-18" name="__codelineno-0-18" href="#__codelineno-0-18"></a> └────────────────────────────────────────────────────────────────┘
<a id="__codelineno-0-19" name="__codelineno-0-19" href="#__codelineno-0-19"></a> │
<a id="__codelineno-0-20" name="__codelineno-0-20" href="#__codelineno-0-20"></a> ▼
<a id="__codelineno-0-21" name="__codelineno-0-21" href="#__codelineno-0-21"></a> ┌──────────────────────────────────────────────────────────────┐
<a id="__codelineno-0-22" name="__codelineno-0-22" href="#__codelineno-0-22"></a> │ Qdrant: http://qdrant:6333 │
<a id="__codelineno-0-23" name="__codelineno-0-23" href="#__codelineno-0-23"></a> │ collection: documents │
<a id="__codelineno-0-24" name="__codelineno-0-24" href="#__codelineno-0-24"></a> │ vector: {size: 768, distance: Cosine} │
<a id="__codelineno-0-25" name="__codelineno-0-25" href="#__codelineno-0-25"></a> │ payload: {path, title, chunk_idx, text, type, mtime, hash} │
<a id="__codelineno-0-26" name="__codelineno-0-26" href="#__codelineno-0-26"></a> └──────────────────────────────────────────────────────────────┘
<a id="__codelineno-0-27" name="__codelineno-0-27" href="#__codelineno-0-27"></a> │
<a id="__codelineno-0-28" name="__codelineno-0-28" href="#__codelineno-0-28"></a> ▼
<a id="__codelineno-0-29" name="__codelineno-0-29" href="#__codelineno-0-29"></a> ┌────────────────────────────┐
<a id="__codelineno-0-30" name="__codelineno-0-30" href="#__codelineno-0-30"></a> │ Open WebUI RAG search │ queries `documents` collection
<a id="__codelineno-0-31" name="__codelineno-0-31" href="#__codelineno-0-31"></a> │ n8n / MCP tools │ same collection, same embedding space
<a id="__codelineno-0-32" name="__codelineno-0-32" href="#__codelineno-0-32"></a> └────────────────────────────┘
</code></pre></div>
<h2 id="why-not-n8n-for-this">Why not n8n for this<a class="headerlink" href="#why-not-n8n-for-this" title="Permanent link">&para;</a></h2>
<p>n8n is the right tool for <strong>event-driven</strong> pipelines (webhook on new file, Paperless
webhook, Nextcloud activity, scheduled re-sync). For a <strong>bulk one-shot crawl</strong>, a Python
script is better:
- direct filesystem access with <code>os.walk</code>
- proper progress bar and error recovery
- batched Qdrant upserts (n8n does one HTTP call per node)
- easy CLI: <code>python3 ingest.py /mnt/pve/unas/Notizen</code></p>
<p>n8n handles the <em>ongoing</em> layer (see <a href="#ongoing-ingestion-n8n">Ongoing ingestion</a>).</p>
<h2 id="supported-file-types">Supported file types<a class="headerlink" href="#supported-file-types" title="Permanent link">&para;</a></h2>
<table>
<thead>
<tr>
<th>Extension</th>
<th>Handler</th>
<th>Notes</th>
</tr>
</thead>
<tbody>
<tr>
<td><code>.pdf</code></td>
<td>Docling</td>
<td>best quality, preserves tables</td>
</tr>
<tr>
<td><code>.docx</code>, <code>.odt</code></td>
<td>Docling</td>
<td></td>
</tr>
<tr>
<td><code>.pptx</code></td>
<td>Docling</td>
<td>slides → sections</td>
</tr>
<tr>
<td><code>.xlsx</code>, <code>.ods</code></td>
<td>Docling</td>
<td>tables → Markdown</td>
</tr>
<tr>
<td><code>.html</code>, <code>.htm</code></td>
<td>Docling</td>
<td></td>
</tr>
<tr>
<td><code>.md</code>, <code>.txt</code>, <code>.rst</code></td>
<td>direct read</td>
<td>no conversion needed</td>
</tr>
<tr>
<td><code>.jpg</code>, <code>.jpeg</code>, <code>.png</code>, <code>.webp</code>, <code>.gif</code></td>
<td>nomic vision</td>
<td>768d image embedding, no text chunks</td>
</tr>
</tbody>
</table>
<h2 id="script-ingestpy">Script: <code>ingest.py</code><a class="headerlink" href="#script-ingestpy" title="Permanent link">&para;</a></h2>
<p>Lives at <code>/opt/stacks/ai/ingest/ingest.py</code>. Runs directly on CT 104.</p>
<h3 id="usage">Usage<a class="headerlink" href="#usage" title="Permanent link">&para;</a></h3>
<div class="highlight"><pre><span></span><code><a id="__codelineno-1-1" name="__codelineno-1-1" href="#__codelineno-1-1"></a><span class="c1"># Index everything under a path</span>
<a id="__codelineno-1-2" name="__codelineno-1-2" href="#__codelineno-1-2"></a>python3<span class="w"> </span>/opt/stacks/ai/ingest/ingest.py<span class="w"> </span>--path<span class="w"> </span>/mnt/pve/unas/Notizen
<a id="__codelineno-1-3" name="__codelineno-1-3" href="#__codelineno-1-3"></a>
<a id="__codelineno-1-4" name="__codelineno-1-4" href="#__codelineno-1-4"></a><span class="c1"># Different collection, force re-index</span>
<a id="__codelineno-1-5" name="__codelineno-1-5" href="#__codelineno-1-5"></a>python3<span class="w"> </span>/opt/stacks/ai/ingest/ingest.py<span class="w"> </span><span class="se">\</span>
<a id="__codelineno-1-6" name="__codelineno-1-6" href="#__codelineno-1-6"></a><span class="w"> </span>--path<span class="w"> </span>/mnt/pve/unas/Dokumente<span class="w"> </span><span class="se">\</span>
<a id="__codelineno-1-7" name="__codelineno-1-7" href="#__codelineno-1-7"></a><span class="w"> </span>--collection<span class="w"> </span>work-docs<span class="w"> </span><span class="se">\</span>
<a id="__codelineno-1-8" name="__codelineno-1-8" href="#__codelineno-1-8"></a><span class="w"> </span>--force
<a id="__codelineno-1-9" name="__codelineno-1-9" href="#__codelineno-1-9"></a>
<a id="__codelineno-1-10" name="__codelineno-1-10" href="#__codelineno-1-10"></a><span class="c1"># Dry run (print files, don&#39;t embed)</span>
<a id="__codelineno-1-11" name="__codelineno-1-11" href="#__codelineno-1-11"></a>python3<span class="w"> </span>/opt/stacks/ai/ingest/ingest.py<span class="w"> </span>--path<span class="w"> </span>/path/to/docs<span class="w"> </span>--dry-run
</code></pre></div>
<h3 id="state-file">State file<a class="headerlink" href="#state-file" title="Permanent link">&para;</a></h3>
<p><code>/opt/stacks/ai/ingest/state/&lt;collection&gt;.json</code> tracks <code>{path: {hash, indexed_at}}</code>.
Subsequent runs skip unchanged files. Delete the state file to force full re-index.</p>
<h3 id="qdrant-collection-schema">Qdrant collection schema<a class="headerlink" href="#qdrant-collection-schema" title="Permanent link">&para;</a></h3>
<div class="highlight"><pre><span></span><code><a id="__codelineno-2-1" name="__codelineno-2-1" href="#__codelineno-2-1"></a><span class="n">vectors_config</span> <span class="o">=</span> <span class="n">VectorParams</span><span class="p">(</span><span class="n">size</span><span class="o">=</span><span class="mi">768</span><span class="p">,</span> <span class="n">distance</span><span class="o">=</span><span class="n">Distance</span><span class="o">.</span><span class="n">COSINE</span><span class="p">)</span>
<a id="__codelineno-2-2" name="__codelineno-2-2" href="#__codelineno-2-2"></a><span class="c1"># payload per point:</span>
<a id="__codelineno-2-3" name="__codelineno-2-3" href="#__codelineno-2-3"></a><span class="p">{</span>
<a id="__codelineno-2-4" name="__codelineno-2-4" href="#__codelineno-2-4"></a> <span class="s2">&quot;path&quot;</span><span class="p">:</span> <span class="s2">&quot;/mnt/pve/unas/Notizen/someFile.md&quot;</span><span class="p">,</span>
<a id="__codelineno-2-5" name="__codelineno-2-5" href="#__codelineno-2-5"></a> <span class="s2">&quot;title&quot;</span><span class="p">:</span> <span class="s2">&quot;someFile&quot;</span><span class="p">,</span> <span class="c1"># filename without ext</span>
<a id="__codelineno-2-6" name="__codelineno-2-6" href="#__codelineno-2-6"></a> <span class="s2">&quot;chunk_idx&quot;</span><span class="p">:</span> <span class="mi">0</span><span class="p">,</span> <span class="c1"># 0-based chunk index within file</span>
<a id="__codelineno-2-7" name="__codelineno-2-7" href="#__codelineno-2-7"></a> <span class="s2">&quot;total_chunks&quot;</span><span class="p">:</span> <span class="mi">3</span><span class="p">,</span>
<a id="__codelineno-2-8" name="__codelineno-2-8" href="#__codelineno-2-8"></a> <span class="s2">&quot;text&quot;</span><span class="p">:</span> <span class="s2">&quot;…chunk content…&quot;</span><span class="p">,</span> <span class="c1"># empty string for images</span>
<a id="__codelineno-2-9" name="__codelineno-2-9" href="#__codelineno-2-9"></a> <span class="s2">&quot;type&quot;</span><span class="p">:</span> <span class="s2">&quot;markdown&quot;</span><span class="p">,</span> <span class="c1"># markdown | pdf | docx | image | …</span>
<a id="__codelineno-2-10" name="__codelineno-2-10" href="#__codelineno-2-10"></a> <span class="s2">&quot;mtime&quot;</span><span class="p">:</span> <span class="mf">1716700000.0</span><span class="p">,</span>
<a id="__codelineno-2-11" name="__codelineno-2-11" href="#__codelineno-2-11"></a> <span class="s2">&quot;hash&quot;</span><span class="p">:</span> <span class="s2">&quot;a3f…&quot;</span><span class="p">,</span> <span class="c1"># sha256 of file content</span>
<a id="__codelineno-2-12" name="__codelineno-2-12" href="#__codelineno-2-12"></a> <span class="s2">&quot;source&quot;</span><span class="p">:</span> <span class="s2">&quot;filesystem&quot;</span><span class="p">,</span>
<a id="__codelineno-2-13" name="__codelineno-2-13" href="#__codelineno-2-13"></a><span class="p">}</span>
</code></pre></div>
<h3 id="chunking-strategy">Chunking strategy<a class="headerlink" href="#chunking-strategy" title="Permanent link">&para;</a></h3>
<p>For Markdown output from Docling (and raw .md/.txt):
1. Split on <code>##</code> / <code>###</code> headers first (keep header as first line of chunk)
2. If chunk &gt; 1200 chars, split further on double-newline (<code>\n\n</code>)
3. If still &gt; 1200 chars, hard-split with 150-char overlap</p>
<p>Images: single point per file, no chunking.</p>
<h3 id="error-handling">Error handling<a class="headerlink" href="#error-handling" title="Permanent link">&para;</a></h3>
<ul>
<li>Docling timeout (&gt;60s): skip file, log to <code>ingest_errors.log</code>, continue</li>
<li>Qdrant upsert failure: retry 3×, then log and continue</li>
<li>Re-run is safe: state file prevents double-indexing</li>
</ul>
<h2 id="building-and-running">Building and running<a class="headerlink" href="#building-and-running" title="Permanent link">&para;</a></h2>
<div class="highlight"><pre><span></span><code><a id="__codelineno-3-1" name="__codelineno-3-1" href="#__codelineno-3-1"></a><span class="c1"># On CT 104</span>
<a id="__codelineno-3-2" name="__codelineno-3-2" href="#__codelineno-3-2"></a>mkdir<span class="w"> </span>-p<span class="w"> </span>/opt/stacks/ai/ingest
<a id="__codelineno-3-3" name="__codelineno-3-3" href="#__codelineno-3-3"></a><span class="nb">cd</span><span class="w"> </span>/opt/stacks/ai/ingest
<a id="__codelineno-3-4" name="__codelineno-3-4" href="#__codelineno-3-4"></a>
<a id="__codelineno-3-5" name="__codelineno-3-5" href="#__codelineno-3-5"></a><span class="c1"># Install deps (lightweight — no torch needed, calls services via HTTP)</span>
<a id="__codelineno-3-6" name="__codelineno-3-6" href="#__codelineno-3-6"></a>pip3<span class="w"> </span>install<span class="w"> </span>qdrant-client<span class="w"> </span>requests<span class="w"> </span>tqdm
<a id="__codelineno-3-7" name="__codelineno-3-7" href="#__codelineno-3-7"></a>
<a id="__codelineno-3-8" name="__codelineno-3-8" href="#__codelineno-3-8"></a><span class="c1"># Run</span>
<a id="__codelineno-3-9" name="__codelineno-3-9" href="#__codelineno-3-9"></a>python3<span class="w"> </span>ingest.py<span class="w"> </span>--path<span class="w"> </span>/mnt/pve/unas/Notizen
</code></pre></div>
<p>No container needed for the script itself — it runs on CT 104 bare Python and calls
<code>http://docling:5001</code>, <code>http://nomic:80</code>, <code>http://qdrant:6333</code> via <code>ai-internal</code> (all
on the same Docker network/host).</p>
<p>To run it from <em>outside</em> CT 104 (e.g. the PVE host), wrap it in a container later.</p>
<h2 id="open-webui-integration">Open WebUI integration<a class="headerlink" href="#open-webui-integration" title="Permanent link">&para;</a></h2>
<p>OWUI's knowledge base already points at Qdrant (<code>VECTOR_DB=qdrant</code>). To surface
documents from the <code>documents</code> collection in chat:</p>
<ol>
<li>Admin → Knowledge → Create Knowledge Base</li>
<li>Name: "Local Documents"</li>
<li>The collection is populated by <code>ingest.py</code> — OWUI will search it on <code>#</code>-prefixed
RAG queries or when the knowledge base is enabled in a chat.</li>
</ol>
<blockquote>
<p><strong>Note</strong>: OWUI creates its own internal collection names. To share the same <code>documents</code>
collection between <code>ingest.py</code> and OWUI, use the OWUI API to create a knowledge base
pointing to the pre-populated collection — or let OWUI manage its own collection and
have <code>ingest.py</code> add documents via the OWUI knowledge API (<code>POST /api/v1/knowledge/{id}/file/add</code>).
The OWUI API path is cleaner for OWUI search integration; the direct Qdrant path is
better for external tools (n8n, MCP).</p>
</blockquote>
<h2 id="ongoing-ingestion-n8n">Ongoing ingestion (n8n)<a class="headerlink" href="#ongoing-ingestion-n8n" title="Permanent link">&para;</a></h2>
<p>After the one-shot crawl, wire n8n for continuous ingestion:</p>
<table>
<thead>
<tr>
<th>Trigger</th>
<th>n8n nodes</th>
<th>Notes</th>
</tr>
</thead>
<tbody>
<tr>
<td>Nextcloud webhook (file created/modified)</td>
<td>HTTP → SSH → <code>ingest.py --path &lt;file&gt;</code></td>
<td>Nextcloud admin → Webhooks app</td>
</tr>
<tr>
<td>Paperless post-consume webhook</td>
<td>HTTP → Docling → nomic → Qdrant upsert</td>
<td>Paperless has <code>POST_CONSUME_SCRIPT</code> hook</td>
</tr>
<tr>
<td>Cron re-scan</td>
<td>Schedule → SSH → <code>ingest.py --path /mnt/pve/unas/Notizen</code></td>
<td>weekly full re-sync</td>
</tr>
</tbody>
</table>
<p>The cron re-scan is safe because <code>ingest.py</code> skips unchanged files via state hash.</p>
<h2 id="paths-available-on-ct-104">Paths available on CT 104<a class="headerlink" href="#paths-available-on-ct-104" title="Permanent link">&para;</a></h2>
<table>
<thead>
<tr>
<th>Path</th>
<th>Contents</th>
</tr>
</thead>
<tbody>
<tr>
<td><code>/mnt/pve/unas/Notizen/</code></td>
<td>Obsidian vault (Markdown)</td>
</tr>
<tr>
<td><code>/mnt/pve/unas/</code></td>
<td>full UNAS NFS share</td>
</tr>
<tr>
<td><code>/opt/stacks/*/</code></td>
<td>stack configs (already in Git, lower priority)</td>
</tr>
</tbody>
</table>
<p>Nextcloud files are on CT 105 (<code>192.168.1.41</code>). Access via:
- WebDAV: <code>https://nc.nuclide.systems/remote.php/dav/files/fkrebs@nucli.de/</code>
- Or mount the NC data volume — not currently mounted on CT 104</p>
<h2 id="status">Status<a class="headerlink" href="#status" title="Permanent link">&para;</a></h2>
<p><strong>Not yet implemented.</strong> Design only. Next step: write <code>ingest.py</code>.</p>
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