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consul/website/build/docs/compatibility.html

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<!DOCTYPE html> <html lang=en> <head> <meta charset=utf-8> <meta name=viewport content="width=device-width, initial-scale=1.0"> <meta name=description content=""> <meta name=author content=""> <title>Serf Protocol Compatibility Promise - Serf</title> <link href="/stylesheets/bootstrap.min-82fe1490.css" media=screen rel=stylesheet /><link href="/stylesheets/main-e5014f86.css" media=screen rel=stylesheet /> <!--[if lt IE 9]><script src="/javascripts/html5shiv-310dd184.js"></script> <script src="/javascripts/respond.min-88c91176.js"></script><![endif]--> <script>
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</script> </head> <body class="page-Serf Protocol Compatibility Promise"> <div id=header> <div class=container> <a class="navbar-brand logo" href="/"> <span></span> </a> <a class="navbar-brand text rls-l" href="/">SERF</a> <ul class="buttons nav navbar-nav navbar-right rls-sb"> <li class=first><a href="/downloads.html">Download</a></li> <li><a href="https://github.com/hashicorp/serf">Github</a></li> </ul> <ul class="main-links nav navbar-nav navbar-right rls-sb"> <li><a href="/intro/index.html">Intro</a></li> <li><a href="/docs/index.html">Docs</a></li> <li><a href="/community.html">Community</a></li> </ul> </div> </div> <div class=container> <div class=col-md-4> <div class="docs-sidebar hidden-print affix-top" role=complementary> <ul class="nav docs-sidenav"> <li> <a href="/docs/index.html">Documentation Home</a> </li> <li class=active> <a href="/docs/upgrading.html">Upgrading and Compatibility</a> <ul class=nav> <li> <a href="/docs/upgrading.html">Upgrading Serf</a> </li> <li class=active> <a href="/docs/compatibility.html">Compatibility Promise</a> </li> </ul> </li> <li> <a href="/docs/internals/index.html">Serf Internals</a> <ul class=nav> <li> <a href="/docs/internals/gossip.html">Gossip Protocol</a> </li> <li> <a href="/docs/internals/security.html">Security Model</a> </li> <li> <a href="/docs/internals/simulator.html">Convergence Simulator</a> </li> </ul> </li> <li> <a href="/docs/commands/index.html">Serf Commands (CLI)</a> <ul class=nav> <li> <a href="/docs/commands/agent.html">agent</a> </li> <li> <a href="/docs/commands/event.html">event</a> </li> <li> <a href="/docs/commands/force-leave.html">force-leave</a> </li> <li> <a href="/docs/commands/join.html">join</a> </li> <li> <a href="/docs/commands/keygen.html">keygen</a> </li> <li> <a href="/docs/commands/leave.html">leave</a> </li> <li> <a href="/docs/commands/members.html">members</a> </li> <li> <a href="/docs/commands/monitor.html">monitor</a> </li> </ul> </li> <li> <a href="/docs/agent/basics.html">Serf Agent</a> <ul class=nav> <li> <a href="/docs/agent/basics.html">Running and Stopping</a> </li> <li> <a href="/docs/agent/options.html">Configuration</a> </li> <li> <a href="/docs/agent/event-handlers.html">Event Handlers</a> </li> <li> <a href="/docs/agent/encryption.html">Encryption</a> </li> <li> <a href="/docs/agent/rpc.html">RPC Protocol</a> </li> </ul> <li> <a href="/docs/roadmap.html">Roadmap</a> </li> </ul> </div> </div> <div class=col-md-8 role=main> <div class=bs-docs-section> <h1 id=toc_0>Protocol Compatibility Promise</h1> <p>We expect Serf to run in large clusters as long-running agents. Because upgrading agents in this sort of environment relies heavily on protocol compatibility, this page makes it clear on our promise to keeping different Serf versions compatible with each other.</p> <p>We promise that every subsequent release of Serf will remain backwards compatible with <em>at least</em> one prior version. Concretely: version 0.5 can speak to 0.4 (and vice versa), but may not be able to speak to 0.1.</p> <p>The backwards compatibility must be explicitly enabled: Serf agents by default will speak the latest protocol, but can be configured to speak earlier ones. If speaking an earlier protocol, <em>new features may not be available</em>. The ability for an agent to speak an earlier protocol is only so that they can be upgraded without cluster disruption.</p> <p>This compatibility guarantee makes it possible to upgrade Serf agents one at a time, one version at a time. For more details on the specifics of upgrading, see the <a href="/docs/upgrading.html">upgrading page</a>.</p> <h2 id=toc_1>Protocol Compatibility Table</h2> <table class="table table-bordered table-striped"> <tr> <th>Version</th> <th>Protocol Compatibility</th> </tr> <tr> <td>0.1.X</td> <td>0</td> </tr> <tr> <td>0.2.X</td> <td>0, 1</td> </tr> <tr> <td>0.3.X</td> <td>0, 1, 2&nbsp;&nbsp;&nbsp;<span class="label label-info">see warning below</span></td> </tr> </table> <div class="alert alert-info"> <p> <strong>Warning: </strong> Version 0.3 introduces support for dynamic ports, allowing each agent to bind to a different port. However, this feature is only supported if all agents are running protocol version 2. Due to the nature of this feature, it is hard to detect using the versioning scheme. If ports are kept consistent across the cluster, then protocol version 2 is fully backwards compatible. </p> </div> </div> </div> </div> <div id=footer> <div class=container> <div class=footer-links> <ul class="main-links nav navbar-nav rls-sb"> <li><a href="/intro/index.html">Intro</a></li> <li class=active><a href="/docs/index.html">Docs</a></li> <li><a href="/community.html">Community</a></li> </ul> <ul class="buttons nav navbar-nav rls-sb"> <li class=first><a href="/downloads.html">Download</a></li> <li><a href="https://github.com/hashicorp/serf">Github</a></li> </ul> </div> <div class=footer-logo> <span></span> </div> <div class="footer-hashi os"> <span>© 2013. A <a href="//www.hashicorp.com">HashiCorp</a> Project.</span> <a href="//www.hashicorp.com"><img src="/images/hashi-logo-s-3644fe63.png"></a> </div> </div> </div> <script src="javascripts/lib/d3.v3.min.js"></script> <script src="javascripts/app/deploy/site.js"></script> <script>
Serf.initialize();
</script> </body> </html>
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