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<h1>Secure connections</h1>
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<p>Watchtower is also capable of connecting to Docker endpoints which are protected by SSL/TLS. If you've used <em>docker-machine</em> to provision your remote Docker host, you simply need to volume mount the certificates generated by <em>docker-machine</em> into the watchtower container and optionally specify <code>--tlsverify</code> flag.</p>
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<p>The <em>docker-machine</em> certificates for a particular host can be located by executing the <code>docker-machine env</code> command for the desired host (note the values for the <code>DOCKER_HOST</code> and <code>DOCKER_CERT_PATH</code> environment variables that are returned from this command). The directory containing the certificates for the remote host needs to be mounted into the watchtower container at <em>/etc/ssl/docker</em>.</p>
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<p>With the certificates mounted into the watchtower container you need to specify the <code>--tlsverify</code> flag to enable verification of the certificate:</p>
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<div class="codehilite"><pre><span></span><code>docker run -d <span class="se">\</span>
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--name watchtower <span class="se">\</span>
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-e <span class="nv">DOCKER_HOST</span><span class="o">=</span><span class="nv">$DOCKER_HOST</span> <span class="se">\</span>
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-e <span class="nv">DOCKER_CERT_PATH</span><span class="o">=</span>/etc/ssl/docker <span class="se">\</span>
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-v <span class="nv">$DOCKER_CERT_PATH</span>:/etc/ssl/docker <span class="se">\</span>
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containrrr/watchtower --tlsverify
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</code></pre></div>
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