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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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<pre><code class="bash">docker run -d \
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--name watchtower \
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-e DOCKER_HOST=$DOCKER_HOST \
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-e DOCKER_CERT_PATH=/etc/ssl/docker \
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-v $DOCKER_CERT_PATH:/etc/ssl/docker \
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containrrr/watchtower --tlsverify
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</code></pre>
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