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<a href='/'>burble.dn42</a> / <a href='/services/'>Services</a> / Internal Services
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<article class="gdoc-markdown">
<h1>Internal Services</h1>
<p>This page provides some documenation on other services used within burble.dn42
that are not directly available for public use.</p>
<div class="gdoc-page__anchorwrap"><h2 id="rproxyburbledn42">rproxy.burble.dn42<a data-clipboard-text="https://dn42.burble.com/services/internal/#rproxyburbledn42" class="gdoc-page__anchor gdoc-page__anchor--right clip" aria-label="Anchor rproxy.burble.dn42" href="#rproxyburbledn42"><svg class="icon link"><use xlink:href="#link"></use></svg></a></h2></div>
<p>Core nodes run an <a href="nginx.com">nginx</a> container that acts as a reverse proxy
for services hosted in tier2.</p>
<p>The reverse proxy is distributed to improve local response times and is
anycast as rproxy.burble.dn42. Most web services provided by burble.dn42 are
simply CNAMEs to the reverse proxy which then balances and forwards the
request to the actual service.</p>
<p>As well as a reverse proxy, nginx also provides:</p>
<ul>
<li>TLS termination</li>
<li>A local page cache to act as a poor man&rsquo;s CDN</li>
<li>Static content server</li>
</ul>
<div class="gdoc-page__anchorwrap"><h2 id="n8nburbledn42">n8n.burble.dn42<a data-clipboard-text="https://dn42.burble.com/services/internal/#n8nburbledn42" class="gdoc-page__anchor gdoc-page__anchor--right clip" aria-label="Anchor n8n.burble.dn42" href="#n8nburbledn42"><svg class="icon link"><use xlink:href="#link"></use></svg></a></h2></div>
<p><a href="https://n8n.io">n8n</a> is used to provide an automation and workflow service.</p>
<p>As an example, n8n is used to update <a href="https://explorer.burble.com">dn42regsrv</a>
and [ROA tables](/services/public#ROA Tables) when the
<a href="https://git.dn42.dev">registry</a> changes.</p>
<p><img src="/n8n-workflow.png" alt="n8n-workflow"></p>
<div class="gdoc-page__anchorwrap"><h2 id="vaultburbledn42">vault.burble.dn42<a data-clipboard-text="https://dn42.burble.com/services/internal/#vaultburbledn42" class="gdoc-page__anchor gdoc-page__anchor--right clip" aria-label="Anchor vault.burble.dn42" href="#vaultburbledn42"><svg class="icon link"><use xlink:href="#link"></use></svg></a></h2></div>
<p><a href="https://www.vaultproject.io/">Hashicorp Vault</a> is used to handle secrets
across the burble.dn42 network.<br/>
Vault is deployed as a 3 node cluster across the Europe core nodes
and uses <a href="https://www.consul.io">Consul</a> as the cluster back end.</p>
<div class="gdoc-page__anchorwrap"><h3 id="tls-certificate-authority">TLS Certificate Authority<a data-clipboard-text="https://dn42.burble.com/services/internal/#tls-certificate-authority" class="gdoc-page__anchor gdoc-page__anchor--right clip" aria-label="Anchor TLS Certificate Authority" href="#tls-certificate-authority"><svg class="icon link"><use xlink:href="#link"></use></svg></a></h3></div>
<p>Vault acts as the main <a href="/services/ca/">certificate authority</a> for burble.dn42
PKI, however there is also an intermediate ACME server based on
<a href="https://smallstep.com/docs/step-ca">smallstep CA</a>.</p>
<p>Vault allows for regular, automated renewal of certificates on short timeframes
(typically a rolling week or monthly basis).</p>
<div class="gdoc-page__anchorwrap"><h3 id="ssh-certificate-authority">SSH Certificate Authority<a data-clipboard-text="https://dn42.burble.com/services/internal/#ssh-certificate-authority" class="gdoc-page__anchor gdoc-page__anchor--right clip" aria-label="Anchor SSH Certificate Authority" href="#ssh-certificate-authority"><svg class="icon link"><use xlink:href="#link"></use></svg></a></h3></div>
<p>Vault also acts as an SSH certificate authority, verifying both users and servers
within the network.</p>
<p>Server certificates are generated during deployment, whilst user (or role)
certificates are short lived and generated on demand.</p>
<div class="gdoc-page__anchorwrap"><h3 id="deployment-secrets">Deployment Secrets<a data-clipboard-text="https://dn42.burble.com/services/internal/#deployment-secrets" class="gdoc-page__anchor gdoc-page__anchor--right clip" aria-label="Anchor Deployment Secrets" href="#deployment-secrets"><svg class="icon link"><use xlink:href="#link"></use></svg></a></h3></div>
<p>Vault holds secrets used during node and service deployments.</p>
<p>Most burble.dn42 are built as stateless container images and secrets are
pushed from vault in to the live containers at runtime. This ensures the
container images do not contain secrets and that secrets can be applied per
instance even when using a common image.</p>
<p>Vault also manages database credentials (using the mysql/mariadb integration),
and these are also automatically generated and pushed in to container
instances on deployment.</p>
<p>The authority to access deployment secrets is inherited, on demand, from the
user token during the deployment process. This ensures that even if access was
gained to the deployment server, secrets could still not be accessed without
also having access to a live user token.</p>
<div class="gdoc-page__anchorwrap"><h2 id="ciburbledn42">ci.burble.dn42<a data-clipboard-text="https://dn42.burble.com/services/internal/#ciburbledn42" class="gdoc-page__anchor gdoc-page__anchor--right clip" aria-label="Anchor ci.burble.dn42" href="#ciburbledn42"><svg class="icon link"><use xlink:href="#link"></use></svg></a></h2></div>
<p>The burble.dn42 <a href="/services/public#git">git</a> has an associated CI/CD service
based on <a href="https://www.drone.io/">drone</a>.</p>
<p>The CI/CD service is used to manage DNS, build and publish applications and
the burble.dn42 website.</p>
<div class="gdoc-page__anchorwrap"><h2 id="minioburbledn42">minio.burble.dn42<a data-clipboard-text="https://dn42.burble.com/services/internal/#minioburbledn42" class="gdoc-page__anchor gdoc-page__anchor--right clip" aria-label="Anchor minio.burble.dn42" href="#minioburbledn42"><svg class="icon link"><use xlink:href="#link"></use></svg></a></h2></div>
<p><a href="https://min.io">min.io</a> is used as an S3 compatible block storage service.
For example, min.io is used for storing build artifacts from CI pipelines.</p>
<p>As well as a central storage server, min.io is deployed in &lsquo;gateway&rsquo; mode
to provide local, regional caches for the block storage.</p>
<p>The min.io services uses a global <a href="https://etcd.io">etcd</a> cluster for credential
management.</p>
<div class="gdoc-page__anchorwrap"><h2 id="loungeburbledn42">lounge.burble.dn42<a data-clipboard-text="https://dn42.burble.com/services/internal/#loungeburbledn42" class="gdoc-page__anchor gdoc-page__anchor--right clip" aria-label="Anchor lounge.burble.dn42" href="#loungeburbledn42"><svg class="icon link"><use xlink:href="#link"></use></svg></a></h2></div>
<p>For lurking on <a href="https://wiki.dn42.us/services/IRC">#dn42</a> I use
<a href="https://thelounge.chat/">thelounge</a>, a web based IRC client.</p>
</article>
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