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Phase 1 — Deploy Infisical on CT 112
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Phase 2 — Migrate CT 104 secrets
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Phase 3 — Coder workspace injection
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Phase 4 — OIDC SSO via Pocket-ID
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Short-term mitigation (before CT 112 is built)
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<h1 id="secrets-manager-infisical-on-ct-109">Secrets Manager — Infisical on CT 109<a class="headerlink" href="#secrets-manager-infisical-on-ct-109" title="Permanent link">&para;</a></h1>
<p><strong>Status: deployed 2026-05-22; migrated CT 112 → CT 109 on 2026-05-26.</strong> Running at <code>http://192.168.1.8:8200</code> (<code>http://secrets.nuclide.lan:8200</code>). LAN-only, no Zoraxy route — secrets must not be internet-exposed.</p>
<p>Stack: <code>infisical/infisical:latest-postgres</code> + Postgres 16 + Redis 7, all on CT 109 (<code>ops</code>, <code>192.168.1.8</code>). Compose at <code>/opt/stacks/infisical/</code> on CT 109. CT 112 ("secrets") is decommissioned; LXC pending removal.</p>
<h2 id="problem-statement">Problem statement<a class="headerlink" href="#problem-statement" title="Permanent link">&para;</a></h2>
<p>Secrets are currently scattered across:</p>
<table>
<thead>
<tr>
<th>Location</th>
<th>Count</th>
<th>Risk</th>
</tr>
</thead>
<tbody>
<tr>
<td><code>/opt/stacks/ai/.env</code> on CT 104</td>
<td>~55 keys</td>
<td>Not versioned; duplicated across stacks</td>
</tr>
<tr>
<td>Per-stack <code>.env</code> files CT 104</td>
<td>~30 keys</td>
<td>Several duplicated (WALG keys, IMMICH_API_KEY, etc.)</td>
</tr>
<tr>
<td>CT 101, 111, 113 <code>.env</code> files</td>
<td>~30 keys</td>
<td>No central rotation story</td>
</tr>
<tr>
<td>Coder <code>main.tf</code> (hardcoded env vars)</td>
<td>6</td>
<td>Committed to Gitea; visible in template history</td>
</tr>
<tr>
<td>HA <code>secrets.yaml</code> on HAOS VM 100</td>
<td>unknown</td>
<td>Not backed up centrally</td>
</tr>
</tbody>
</table>
<p>Goal: single LAN-only secret store that agents, Docker services, and Coder workspaces pull from programmatically. ~85 unique secrets identified in sweep (2026-05-22).</p>
<hr />
<h2 id="candidate-solutions">Candidate solutions<a class="headerlink" href="#candidate-solutions" title="Permanent link">&para;</a></h2>
<h3 id="1-infisical-recommended">1. Infisical (recommended)<a class="headerlink" href="#1-infisical-recommended" title="Permanent link">&para;</a></h3>
<p>Open-source HashiCorp Vault alternative. Docker-compose deployable. Native integrations for:</p>
<ul>
<li>Docker secrets injection (Infisical agent sidecar)</li>
<li>Kubernetes/Coder workspace env injection</li>
<li>REST API + OIDC machine identities</li>
<li>OIDC SSO (can federate with Pocket-ID)</li>
<li>Web UI</li>
</ul>
<p><strong>Deployment</strong>: separate LXC (recommended — see rationale below). Postgres backend → candidate for CT 113 consolidation once second NVMe lands.</p>
<p><strong>Port</strong>: 8080 internally; no external exposure needed (LAN-only MCP sidecar pattern).</p>
<hr />
<h3 id="2-hashicorp-vault-oss">2. HashiCorp Vault (OSS)<a class="headerlink" href="#2-hashicorp-vault-oss" title="Permanent link">&para;</a></h3>
<p>Industry standard. Steeper ops overhead (unsealing, audit logs, lease renewal). Overkill for a homelab unless you need HSM-grade guarantees.</p>
<hr />
<h3 id="3-doppler-saas">3. Doppler (SaaS)<a class="headerlink" href="#3-doppler-saas" title="Permanent link">&para;</a></h3>
<p>Managed; free tier; native CLI and Docker integration. Outbound dependency; secrets leave the homelab. <strong>Not suitable</strong> given the DLR/LUMEN data handling doctrine.</p>
<hr />
<h3 id="4-stay-with-vaultwarden-manual-oidc">4. Stay with Vaultwarden + manual OIDC<a class="headerlink" href="#4-stay-with-vaultwarden-manual-oidc" title="Permanent link">&para;</a></h3>
<p>Already deployed. Works for human access. No programmatic injection without writing custom code. Dead end for agent/pipeline automation.</p>
<hr />
<h2 id="recommendation-infisical-on-a-dedicated-lxc">Recommendation: Infisical on a dedicated LXC<a class="headerlink" href="#recommendation-infisical-on-a-dedicated-lxc" title="Permanent link">&para;</a></h2>
<h3 id="why-a-separate-lxc">Why a separate LXC?<a class="headerlink" href="#why-a-separate-lxc" title="Permanent link">&para;</a></h3>
<ol>
<li><strong>Blast radius isolation</strong> — if the CT 104 Docker stack is compromised, the secret store is not on the same attack surface.</li>
<li><strong>Minimal footprint</strong> — Infisical + Postgres is the only workload; nothing else can mess with the process space.</li>
<li><strong>Simpler audit</strong> — outbound connections from CT 104 are numerous; a dedicated secrets LXC should have near-zero egress.</li>
<li><strong>HA restart independence</strong> — CT 104 restarts (image gen, GPU passthrough experiments) don't affect secret availability.</li>
</ol>
<p>Suggested: <strong>CT 112</strong> (next available), 2 vCPU / 2 GB RAM, 8 GB disk on local-zfs.</p>
<hr />
<h2 id="architecture">Architecture<a class="headerlink" href="#architecture" title="Permanent link">&para;</a></h2>
<pre class="mermaid"><code>flowchart TD
subgraph CT112["CT 112 — secrets"]
infisical["Infisical Server\n:8080"]
pg_sec["Postgres\n(infisical DB)"]
infisical --- pg_sec
end
subgraph CT104["CT 104 — Docker host"]
agent["Infisical Agent\n(sidecar per stack)"]
env_file[".env (templated)\nrendered at startup"]
agent --&gt;|pull on start| infisical
agent --&gt; env_file
end
subgraph CT111["CT 111 — Coder"]
coder["Coder server"]
ws["Workspace containers\n(env injected at provision)"]
coder --&gt;|agent token| infisical
coder --&gt; ws
end
subgraph CT110["CT 110 — Pocket-ID"]
oidc["OIDC IdP"]
end
oidc --&gt;|machine identity| infisical
oidc --&gt;|user SSO| infisical</code></pre>
<hr />
<h2 id="setup-plan">Setup plan<a class="headerlink" href="#setup-plan" title="Permanent link">&para;</a></h2>
<h3 id="phase-1-deploy-infisical-on-ct-112">Phase 1 — Deploy Infisical on CT 112<a class="headerlink" href="#phase-1-deploy-infisical-on-ct-112" title="Permanent link">&para;</a></h3>
<div class="highlight"><pre><span></span><code><a id="__codelineno-0-1" name="__codelineno-0-1" href="#__codelineno-0-1"></a><span class="c1"># On Proxmox host</span>
<a id="__codelineno-0-2" name="__codelineno-0-2" href="#__codelineno-0-2"></a>pvesh<span class="w"> </span>create<span class="w"> </span>/nodes/nuc/lxc<span class="w"> </span><span class="se">\</span>
<a id="__codelineno-0-3" name="__codelineno-0-3" href="#__codelineno-0-3"></a><span class="w"> </span>--ostemplate<span class="w"> </span>local:vztmpl/debian-12-standard_12.7-1_amd64.tar.zst<span class="w"> </span><span class="se">\</span>
<a id="__codelineno-0-4" name="__codelineno-0-4" href="#__codelineno-0-4"></a><span class="w"> </span>--vmid<span class="w"> </span><span class="m">112</span><span class="w"> </span>--hostname<span class="w"> </span>secrets<span class="w"> </span>--memory<span class="w"> </span><span class="m">2048</span><span class="w"> </span>--cores<span class="w"> </span><span class="m">2</span><span class="w"> </span><span class="se">\</span>
<a id="__codelineno-0-5" name="__codelineno-0-5" href="#__codelineno-0-5"></a><span class="w"> </span>--rootfs<span class="w"> </span>local-zfs:8<span class="w"> </span>--net0<span class="w"> </span><span class="nv">name</span><span class="o">=</span>eth0,bridge<span class="o">=</span>vmbr0,ip<span class="o">=</span>dhcp
<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><span class="c1"># Inside CT 112</span>
<a id="__codelineno-0-8" name="__codelineno-0-8" href="#__codelineno-0-8"></a>apt-get<span class="w"> </span>install<span class="w"> </span>-y<span class="w"> </span>docker.io<span class="w"> </span>docker-compose-plugin
<a id="__codelineno-0-9" name="__codelineno-0-9" href="#__codelineno-0-9"></a><span class="c1"># Deploy from https://github.com/Infisical/infisical (official compose)</span>
</code></pre></div>
<p>Infisical requires a Redis instance alongside Postgres. The official <code>docker-compose.yml</code> bundles both.</p>
<h3 id="phase-2-migrate-ct-104-secrets">Phase 2 — Migrate CT 104 secrets<a class="headerlink" href="#phase-2-migrate-ct-104-secrets" title="Permanent link">&para;</a></h3>
<ol>
<li>Create an Infisical project <code>homelab/ct104</code></li>
<li>Import existing <code>.env</code> keys via Infisical CLI: <code>infisical import --env prod --path /homelab/ct104 &lt; .env</code></li>
<li>Add Infisical agent to each compose stack as a sidecar that renders <code>.env</code> from templates at container start</li>
</ol>
<h3 id="phase-3-coder-workspace-injection">Phase 3 — Coder workspace injection<a class="headerlink" href="#phase-3-coder-workspace-injection" title="Permanent link">&para;</a></h3>
<p>Infisical has a native Coder integration (via machine identity token). Replace hardcoded env vars in <code>main.tf</code> with:
<div class="highlight"><pre><span></span><code><a id="__codelineno-1-1" name="__codelineno-1-1" href="#__codelineno-1-1"></a><span class="kr">data</span><span class="w"> </span><span class="nc">&quot;external&quot;</span><span class="w"> </span><span class="nv">&quot;secrets&quot;</span><span class="w"> </span><span class="p">{</span>
<a id="__codelineno-1-2" name="__codelineno-1-2" href="#__codelineno-1-2"></a><span class="w"> </span><span class="na">program</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">[</span><span class="s2">&quot;infisical&quot;, &quot;export&quot;, &quot;--env&quot;, &quot;prod&quot;, &quot;--path&quot;, &quot;/coder/workspaces&quot;, &quot;--format&quot;, &quot;dotenv-export&quot;</span><span class="p">]</span>
<a id="__codelineno-1-3" name="__codelineno-1-3" href="#__codelineno-1-3"></a><span class="p">}</span>
</code></pre></div></p>
<p>Or use the Infisical agent installed in the workspace image.</p>
<h3 id="phase-4-oidc-sso-via-pocket-id">Phase 4 — OIDC SSO via Pocket-ID<a class="headerlink" href="#phase-4-oidc-sso-via-pocket-id" title="Permanent link">&para;</a></h3>
<p>Infisical supports OIDC SSO under Settings → Authentication → OIDC. Register a new client in Pocket-ID with callback <code>https://secrets.nuclide.systems/api/v1/sso/oidc/callback</code> (or LAN-only URL).</p>
<hr />
<h2 id="prioritisation">Prioritisation<a class="headerlink" href="#prioritisation" title="Permanent link">&para;</a></h2>
<table>
<thead>
<tr>
<th>Item</th>
<th>Effort</th>
<th>Value</th>
</tr>
</thead>
<tbody>
<tr>
<td>Create CT 112, deploy Infisical</td>
<td>1h</td>
<td>High — removes .env sprawl</td>
</tr>
<tr>
<td>Migrate CT 104 .env</td>
<td>30min</td>
<td>High</td>
</tr>
<tr>
<td>Coder template injection</td>
<td>1h</td>
<td>Medium — workspaces currently work</td>
</tr>
<tr>
<td>HA secrets.yaml → Infisical</td>
<td>30min (HA add-on)</td>
<td>Medium</td>
</tr>
<tr>
<td>OIDC SSO via Pocket-ID</td>
<td>30min</td>
<td>Low (convenience)</td>
</tr>
</tbody>
</table>
<hr />
<h2 id="short-term-mitigation-before-ct-112-is-built">Short-term mitigation (before CT 112 is built)<a class="headerlink" href="#short-term-mitigation-before-ct-112-is-built" title="Permanent link">&para;</a></h2>
<ol>
<li>Remove secrets from Coder <code>main.tf</code> that appear in Gitea history — use Coder template variables or env injection instead.</li>
<li>Keep <code>/opt/stacks/ai/.env</code> mode <code>0600</code>; ensure it is in <code>.gitignore</code> for any repo that mounts that directory.</li>
<li>Use Vaultwarden as the authoritative human copy; rotate any key that has appeared in Claude Code context (see <code>audit-claude-code-meta.md</code>).</li>
</ol>
<hr />
<h2 id="related">Related<a class="headerlink" href="#related" title="Permanent link">&para;</a></h2>
<ul>
<li>[[postgres-consolidation]] — CT 113 will consolidate Postgres instances including Infisical's DB</li>
<li>[[feedback_zoraxy_confirm]] — Zoraxy route for <code>secrets.nuclide.systems</code> will need operator approval when CT 112 is ready</li>
<li><code>security/audit-claude-code-meta.md</code> — lists secrets that transited Claude API this session</li>
</ul>
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