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<!doctype html><html lang="en" class="no-js"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width,initial-scale=1"><meta http-equiv="x-ua-compatible" content="ie=edge"><link rel="canonical" href="http://containrrr.github.io/watchtower/secure-connections/"><meta name="lang:clipboard.copy" content="Copy to clipboard"><meta name="lang:clipboard.copied" content="Copied to clipboard"><meta name="lang:search.language" content="en"><meta name="lang:search.pipeline.stopwords" content="True"><meta name="lang:search.pipeline.trimmer" content="True"><meta name="lang:search.result.none" content="No matching documents"><meta name="lang:search.result.one" content="1 matching document"><meta name="lang:search.result.other" content="# matching documents"><meta name="lang:search.tokenizer" content="[\s\-]+"><link rel="shortcut icon" href="../assets/images/favicon.png"><meta name="generator" content="mkdocs-1.0.4, mkdocs-material-4.3.1"><title>Secure connections - Watchtower</title><link rel="stylesheet" href="../assets/stylesheets/application.4031d38b.css"><script src="../assets/javascripts/modernizr.74668098.js"></script><link href="https://fonts.gstatic.com" rel="preconnect" crossorigin><link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Roboto:300,400,400i,700|Roboto+Mono&display=swap"><style>body,input{font-family:"Roboto","Helvetica Neue",Helvetica,Arial,sans-serif}code,kbd,pre{font-family:"Roboto Mono","Courier New",Courier,monospace}</style><link rel="stylesheet" href="../assets/fonts/material-icons.css"></head><body dir="ltr"><svg class="md-svg"><defs><svg xmlns="http://www.w3.org/2000/svg" width="416" height="448" viewBox="0 0 416 448" id="__github"><path fill="currentColor" d="M160 304q0 10-3.125 20.5t-10.75 19T128 352t-18.125-8.5-10.75-19T96 304t3.125-20.5 10.75-19T128 256t18.125 8.5 10.75 19T160 304zm160 0q0 10-3.125 20.5t-10.75 19T288 352t-18.125-8.5-10.75-19T256 304t3.125-20.5 10.75-19T288 256t18.125 8.5 10.75 19T320 304zm40 0q0-30-17.25-51T296 232q-10.25 0-48.75 5.25Q229.5 240 208 240t-39.25-2.75Q130.75 232 120 232q-29.5 0-46.75 21T56 304q0 22 8 38.375t20.25 25.75 30.5 15 35 7.375 37.25 1.75h42q20.5 0 37.25-1.75t35-7.375 30.5-15 20.25-25.75T360 304zm56-44q0 51.75-15.25 82.75-9.5 19.25-26.375 33.25t-35.25 21.5-42.5 11.875-42.875 5.5T212 416q-19.5 0-35.5-.75t-36.875-3.125-38.125-7.5-34.25-12.875T37 371.5t-21.5-28.75Q0 312 0 260q0-59.25 34-99-6.75-20.5-6.75-42.5 0-29 12.75-54.5 27 0 47.5 9.875t47.25 30.875Q171.5 96 212 96q37 0 70 8 26.25-20.5 46.75-30.25T376 64q12.75 25.5 12.75 54.5 0 21.75-6.75 42 34 40 34 99.5z"/></svg></defs></svg> <input class="md-toggle" data-md-toggle="drawer" type="checkbox" id="__drawer" autocomplete="off"> <input class="md-toggle" data-md-toggle="search" type="checkbox" id="__search" autocomplete="off"> <label class="md-overlay" data-md-component="overlay" for="__drawer"></label><header class="md-header" data-md-component="header"><nav class="md-header-nav md-grid"><div class="md-flex"><div class="md-flex__cell md-flex__cell--shrink"><a href="http://containrrr.github.io/watchtower/" title="Watchtower" class="md-header-nav__button md-logo"><i class="md-icon"></i></a></div><div class="md-flex__cell md-flex__cell--shrink"><label class="md-icon md-icon--menu md-header-nav__button" for="__drawer"></label></div><div class="md-flex__cell md-flex__cell--stretch"><div class="md-flex__ellipsis md-header-nav__title" data-md-component="title"><span class="md-header-nav__topic">Watchtower</span><span class="md-header-nav__topic">Secure connections</span></div></div><div class="md-flex__cell md-flex__cell--shrink"><label class="md-icon md-icon--search md-header-nav__button" for="__search"></label><div class="md-search" data-md-component="search" role="dialog"><label class="md-search__overlay" for="__search"></label><div class="md-search__inner" role="search"><form class="md-search__form" name="search"><input type="text" class="md-search__input" name="query" placeholder="Search" autocapitalize="off" autocorrect="off" autocomplete="off" spellcheck="false" data-md-compone
<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>
<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>
<pre><code class="bash">docker run -d \
--name watchtower \
-e DOCKER_HOST=$DOCKER_HOST \
-e DOCKER_CERT_PATH=/etc/ssl/docker \
-v $DOCKER_CERT_PATH:/etc/ssl/docker \
containrrr/watchtower --tlsverify
</code></pre></article></div></div></main><footer class="md-footer"><div class="md-footer-nav"><nav class="md-footer-nav__inner md-grid"><a href="../remote-hosts/" title="Remote hosts" class="md-flex md-footer-nav__link md-footer-nav__link--prev" rel="prev"><div class="md-flex__cell md-flex__cell--shrink"><i class="md-icon md-icon--arrow-back md-footer-nav__button"></i></div><div class="md-flex__cell md-flex__cell--stretch md-footer-nav__title"><span class="md-flex__ellipsis"><span class="md-footer-nav__direction">Previous</span>Remote hosts</span></div></a><a href="../stop-signals/" title="Stop signals" class="md-flex md-footer-nav__link md-footer-nav__link--next" rel="next"><div class="md-flex__cell md-flex__cell--stretch md-footer-nav__title"><span class="md-flex__ellipsis"><span class="md-footer-nav__direction">Next</span>Stop signals</span></div><div class="md-flex__cell md-flex__cell--shrink"><i class="md-icon md-icon--arrow-forward md-footer-nav__button"></i></div></a></nav></div><div class="md-footer-meta md-typeset"><div class="md-footer-meta__inner md-grid"><div class="md-footer-copyright">powered by <a href="https://www.mkdocs.org">MkDocs</a> and <a href="https://squidfunk.github.io/mkdocs-material/">Material for MkDocs</a></div></div></div></footer></div><script src="../assets/javascripts/application.b260a35d.js"></script><script>app.initialize({version:"1.0.4",url:{base:".."}})</script></body></html>