output/blog/tags/linode.html - libcloud-site - Git at Google

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     <h1>Tag: linode</h1>


     <div class="post">

     <h2 class="post-title"><a href="/blog/2016/01/14/notice-for-linode-users.html">Notice for Linode users</a></h2>

   <span class="post-date-author">By Tomaz Muraus on Jan 14, 2016</span>

   <div class="post-content">
     <p>This is an announcement for users of the Linode driver for Libcloud who might
 have started experiencing issues recently.</p>

 <h2 id="background">Background</h2>

 <p>A couple of Libcloud users have reported that they have recently started
 experiencing issues when talking to the Linode API using Libcloud. They have
 received messages similar to the one shown below.</p>

 <pre>
 socket.error: [Errno 104] Connection reset by peer
 </pre>

 <p>It turns out that the issue is related to the used SSL / TLS version. For
 compatibility and security reasons (Libcloud also supports older Python
 versions), Libcloud uses TLS v1.0 by default.</p>

 <p>Linode recently dropped support for TLS v1.0 and it now only support TLS &gt;=
 v1.1. This means Libcloud won’t work out of the box anymore.</p>

 <h2 id="solution">Solution</h2>

 <p>If you are experiencing this issue, you should update your code to use TLS v1.2
 or TLS v1.1 as shown below.</p>

 <div class="language-plaintext highlighter-rouge">
   <div class="highlight">
     <pre class="highlight"><code>import ssl

 import libcloud.security
 libcloud.security.SSL_VERSION = ssl.PROTOCOL_TLSv1_1
 # or even better if your system and Python version supports TLS v1.2
 libcloud.security.SSL_VERSION = ssl.PROTOCOL_TLSv1_2

 # Instantiate and work with the Linode driver here...
 </code></pre>
   </div>
 </div>

 <p>Keep in mind that for this to work you need to have a recent version of OpenSSL
 installed on your system and you need to use Python &gt;= 3.4 or Python 2.7.9.</p>

 <p>For more details please see recently updated <a href="https://libcloud.readthedocs.org/en/latest/other/ssl-certificate-validation.html#changing-used-ssl-tls-version">documentation</a>. If you are
 still experiencing issues or have any questions, please feel free to reach
 us via the mailing list or IRC.</p>

 <p>Note: Even if you are not experiencing any issues, it’s generally a good idea
 to use the highest version of TLS supported by your system and the provider you
 use.</p>

 <h2 id="quick-note-on-sslprotocol_sslv23">Quick note on ssl.PROTOCOL_SSLv23</h2>

 <p>Python uses <code class="language-plaintext highlighter-rouge">ssl.PROTOCOL_SSLv23</code> constant by default. When this constant is
 used, it will let client known to pick the highest protocol version which both
 the client and server support (it will be selecting between SSL v3.0, TLS v1.0,
 TLS v1.1 and TLS v1.2).</p>

 <p>We use <code class="language-plaintext highlighter-rouge">ssl.PROTOCOL_TLSv1</code> instead of <code class="language-plaintext highlighter-rouge">ssl.PROTOCOL_SSLv23</code> for security
 and compatibility reasons. SSL v3.0 is considered broken and unsafe and using
 <code class="language-plaintext highlighter-rouge">ssl.PROTOCOL_SSLv23</code> can result in an increased risk for a downgrade attack.</p>

 <h3 id="thanks">Thanks</h3>

 <p>Special thanks to Jacob Riley, Steve V, Heath Naylor and everyone from
 <a href="https://issues.apache.org/jira/browse/LIBCLOUD-791">LIBCLOUD-791</a> who helped debug and track down the root cause of this issue.</p>


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       <p>Tags: <a href="/blog/tags/news.html" rel="tag">news</a>, <a href="/blog/tags/linode.html" rel="tag">linode</a>, <a href="/blog/tags/announcement.html" rel="tag">announcement</a></p>
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	<h1>Tag: linode</h1>




	<div class="post">

	<h2 class="post-title"><a href="/blog/2016/01/14/notice-for-linode-users.html">Notice for Linode users</a></h2>

	<span class="post-date-author">By Tomaz Muraus on Jan 14, 2016</span>

	<div class="post-content">
	<p>This is an announcement for users of the Linode driver for Libcloud who might
	have started experiencing issues recently.</p>

	<h2 id="background">Background</h2>

	<p>A couple of Libcloud users have reported that they have recently started
	experiencing issues when talking to the Linode API using Libcloud. They have
	received messages similar to the one shown below.</p>

	<pre>
	socket.error: [Errno 104] Connection reset by peer
	</pre>

	<p>It turns out that the issue is related to the used SSL / TLS version. For
	compatibility and security reasons (Libcloud also supports older Python
	versions), Libcloud uses TLS v1.0 by default.</p>

	<p>Linode recently dropped support for TLS v1.0 and it now only support TLS >=
	v1.1. This means Libcloud won’t work out of the box anymore.</p>

	<h2 id="solution">Solution</h2>

	<p>If you are experiencing this issue, you should update your code to use TLS v1.2
	or TLS v1.1 as shown below.</p>

	<div class="language-plaintext highlighter-rouge">
	<div class="highlight">
	<pre class="highlight"><code>import ssl

	import libcloud.security
	libcloud.security.SSL_VERSION = ssl.PROTOCOL_TLSv1_1
	# or even better if your system and Python version supports TLS v1.2
	libcloud.security.SSL_VERSION = ssl.PROTOCOL_TLSv1_2

	# Instantiate and work with the Linode driver here...
	</code></pre>
	</div>
	</div>

	<p>Keep in mind that for this to work you need to have a recent version of OpenSSL
	installed on your system and you need to use Python >= 3.4 or Python 2.7.9.</p>

	<p>For more details please see recently updated <a href="https://libcloud.readthedocs.org/en/latest/other/ssl-certificate-validation.html#changing-used-ssl-tls-version">documentation</a>. If you are
	still experiencing issues or have any questions, please feel free to reach
	us via the mailing list or IRC.</p>

	<p>Note: Even if you are not experiencing any issues, it’s generally a good idea
	to use the highest version of TLS supported by your system and the provider you
	use.</p>

	<h2 id="quick-note-on-sslprotocol_sslv23">Quick note on ssl.PROTOCOL_SSLv23</h2>

	<p>Python uses <code class="language-plaintext highlighter-rouge">ssl.PROTOCOL_SSLv23</code> constant by default. When this constant is
	used, it will let client known to pick the highest protocol version which both
	the client and server support (it will be selecting between SSL v3.0, TLS v1.0,
	TLS v1.1 and TLS v1.2).</p>

	<p>We use <code class="language-plaintext highlighter-rouge">ssl.PROTOCOL_TLSv1</code> instead of <code class="language-plaintext highlighter-rouge">ssl.PROTOCOL_SSLv23</code> for security
	and compatibility reasons. SSL v3.0 is considered broken and unsafe and using
	<code class="language-plaintext highlighter-rouge">ssl.PROTOCOL_SSLv23</code> can result in an increased risk for a downgrade attack.</p>

	<h3 id="thanks">Thanks</h3>

	<p>Special thanks to Jacob Riley, Steve V, Heath Naylor and everyone from
	<a href="https://issues.apache.org/jira/browse/LIBCLOUD-791">LIBCLOUD-791</a> who helped debug and track down the root cause of this issue.</p>


	</div>

	<div class="row section post-meta">
	<div class="col-md-12 post-tags">
	<p>Tags: <a href="/blog/tags/news.html" rel="tag">news</a>, <a href="/blog/tags/linode.html" rel="tag">linode</a>, <a href="/blog/tags/announcement.html" rel="tag">announcement</a></p>
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