open-nomad/website/source/index.html.erb

---
description: |-
  Nomad is a highly available, distributed, data-center aware cluster and
  application scheduler designed to support the modern datacenter with support
  for long-running services, batch jobs, and much more.
---

<header>
  <div class="container hero">
    <div class="row">
      <div class="col-md-offset-2 col-md-8">
        <%= inline_svg "logo-hashicorp.svg", height: 120, class: "logo" %>

        <h1>Easily Deploy Applications at Any Scale</h1>

        <a class="button primary" href="/intro/index.html">Get Started</a>
        <a class="button" href="/downloads.html">Download <%= latest_version %></a>
      </div>
    </div>
  </div>
</header>

<section id="features" class="marketing green">
  <div class="container">
    <div class="row">
      <div class="col-sm-12">
        <h2>Simple and Lightweight</h2>
        <p class="lead">
          Nomad is a single binary that schedules applications and services on
          Linux, Windows, and Mac. It is an open source scheduler that uses a
          declarative job file for scheduling virtualized, containerized, and
          standalone applications.
        </p>
      </div>
    </div>
    <div class="row">
      <div class="col-sm-6">
        <h3>1. Declare Jobs</h3>
        <p>
          Users compose and submit high-level job files. Nomad handles the
          scheduling and upgrading of the applications over time.
        </p>
        <p>
          This flexibility makes it easy to deploy one container, dozens of
          containers, or even <a
          href="https://www.hashicorp.com/c1m/">millions</a>.
        </p>
      </div>
      <div class="col-sm-6">
        <h3>2. Plan Changes</h3>
        <p>
          With built-in dry-run execution, Nomad shows what scheduling decisions
          it will take before it takes them. Operators can approve or deny these
          changes to create a safe and reproducible workflow.
        </p>
      </div>
    </div>
    <div class="row">
      <div class="col-sm-6">
        <h3>3. Run Applications</h3>
        <p>
          Nomad runs applications and ensures they keep running in failure
          scenarios. In addition to long-running services, Nomad can schedule
          batch jobs, distributed cron jobs, and parameterized jobs.
        </p>
      </div>
      <div class="col-sm-6">
        <h3>4. Monitor Progress</h3>
        <p>
          Stream logs, send signals, and interact with the file system of
          scheduled applications. These operator-friendly commands bring the
          familiar debugging tools to a scheduled world.
        </p>
      </div>
    </div>
  </div>
</section>

<section id="hybrid-multi-cloud" class="marketing">
  <div class="container">
    <div class="row">
      <div class="col-sm-12">
        <span class="callout">Combine</span>
        <h2>Hybrid &amp; Multi Cloud</h2>
        <p class="lead">
          As more organizations adopt cloud technologies, the desire to run in
          multiple datacenters and multiple regions becomes critical. Nomad can
          span public and private clouds and treat all your infrastructure as a
          pool of resources.
        </p>
      </div>
    </div>

    <div class="row">
      <div class="col-sm-12">
        <%= inline_svg "feature-public-private-clouds.svg" %>
      </div>
    </div>

    <div class="row">
      <div class="col-sm-6">
        <h3>Hybrid Cloud</h3>
        <p>
          Nomad bridges the gap between the public and private cloud, creating a
          unified interface for developers to run any application on any
          infrastructure. Easily run services across your internal private cloud
          and external public cloud transparently to application developers.
        </p>
      </div>
      <div class="col-sm-6">
        <h3>Multi Cloud</h3>
        <p>
          As more organizations adopt cloud technologies, the desire to run
          applications simultaneously across multiple clouds increases. Nomad
          combines the power of all cloud providers into a single, unified
          interface for deploying applications and running services.
        </p>
      </div>
    </div>
  </div>
</section>

<section id="simplify" class="marketing green">
  <div class="container">
    <div class="row">
      <div class="col-sm-12">
        <span class="callout">Maintain</span>
        <h2>Simplify Operations</h2>
        <p class="lead">
          Nomad simplifies operations by supporting several deployment
          strategies to safely upgrade jobs, automatically handling machine
          failures, and providing a single workflow to deploy applications.
        </p>
      </div>
    </div>

    <div class="row">
      <div class="col-sm-offset-5 col-sm-6">
        <h3>Rolling Deploys</h3>
      </div>
    </div>
    <div class="row">
      <div class="col-sm-5" id="feature-rolling-deploys">
        <%= inline_svg "feature-rolling-deploys.svg" %>
      </div>
      <div class="col-sm-7">
        <p>
          In order to update an application while reducing downtime, Nomad
          provides a built-in mechanism for rolling upgrades. Operators specify
          the rate at which they would like to upgrade their service in the
          declarative job file, plan the changes, and submit the new job. Nomad
          then updates the service to the newest version using task health and
          Consul health check information to ensure replacement allocations are
          healthy. With full control over the update strategy, rolling upgrades
          make application deployments simple and safe.
        </p>
      </div>
    </div>

    <div class="row">
      <div class="col-sm-12">
        <h3>Blue/Green Deployments</h3>
      </div>
    </div>
    <div class="row">
      <div class="col-sm-7">
        <p>
          Nomad supports native blue/green and canary deployments through the
          declarative job file syntax. Instead of doing a rolling upgrade of the
          existing allocations, the new version of the group is deployed along
          side the existing set. While this duplicates the resources required
          during the upgrade process, it allows very safe deployments as the
          original version of the group is untouched till the operator promotes
          the new version.
        </p>
      </div>
      <div class="col-sm-5">
        <%= inline_svg "feature-blue-green.svg" %>
      </div>
    </div>

    <div class="row">
      <div class="col-sm-offset-5 col-sm-6">
        <h3>Automatic Machine Failures</h3>
      </div>
    </div>
    <div class="row">
      <div class="col-sm-5">
        <%= inline_svg "feature-machine-failure.svg" %>
      </div>
      <div class="col-sm-7">
        <p>
          Because it knows the state of all nodes and applications, if a
          node becomes unhealthy, Nomad will automatically reschedule the
          applications that were previously running on the unhealthy host
          onto a new, healthy host if capacity exists. As new clients are
          added to the cluster, they can share the responsibility of
          running applications and services.
        </p>
      </div>
    </div>
  </div>
</section>

<section id="flexible-workloads" class="marketing">
  <div class="container">
    <div class="row">
      <div class="col-sm-12">
        <span class="callout">Support</span>
        <h2>Flexible Workloads</h2>
        <p class="lead">
          In addition to supporting Linux, Windows, and Mac, Nomad has
          extensible support for containerized, virtualized, and standalone
          applications. Easily start Docker containers, VMs, or application
          runtimes like Java.
        </p>
      </div>
    </div>

    <div class="row">
      <div class="col-sm-12">
        <%= inline_svg "feature-flexible-workloads.svg" %>
      </div>
    </div>

    <div class="row">
      <div class="col-sm-6">
        <h3>Diverse Technologies</h3>
        <p>
          By supporting a wide range of technologies such as Docker, rkt, and
          LXC, Nomad does not force you into a single technology. Easily use
          multiple container or virtualization runtimes simultaneously.
          Applications with their own runtime such as Java or Go can be
          scheduled directly without the overhead of a container.
        </p>
      </div>
      <div class="col-sm-6">
        <h3>Multi OS</h3>
        <p>
          The Nomad client runs on Linux, Windows, and Mac OS. This diverse
          operating system support enables using the same application scheduler
          for all your scheduling and runtime needs.
        </p>
      </div>
    </div>
  </div>
</section>


<section id="binpacking" class="marketing black">
  <div class="container">
    <div class="row">
      <div class="col-sm-12">
        <span class="callout">Maximize</span>
        <h2>Increase Utilization &amp; Reduce Costs</h2>
        <p class="lead">
          Nomad uses bin packing to optimize application placement onto servers
          to maximize resource utilization, increase density, and help reduce
          costs.
        </p>
      </div>
    </div>

    <div class="row">
      <div class="col-sm-12">
        <%= inline_svg "feature-binpacking.svg" %>
      </div>
    </div>

    <div class="row">
      <div class="col-sm-6">
        <h3>Increase Density</h3>
        <p>
          Nomad places applications and services based on a bin packing
          algorithm, which is used to optimize the resource utilization and
          density of applications. Nomad automatically augments the bin-packing
          algorithm with anti-affinity rules to avoid colocating instances of
          the same service to reduce the probability of correlated failures.
        </p>
      </div>
      <div class="col-sm-6">
        <h3>Reduce Costs</h3>
        <p>
          By maximizing resource utilization, Nomad can help remove unused or
          under-utilized machines in the cluster, reducing overall costs.
          Additionally, Nomad enables organizations to utilize larger, more
          cost-effective compute devices which can be less expensive at scale.
        </p>
      </div>
    </div>
  </div>
</section>

<section id="examples" class="marketing gray">
  <div class="container">
    <div class="row">
      <div class="col-sm-12">
        <h2>Examples</h2>
        <h3>Create and Submit Jobs</h3>
        <p>
          Easily create, validate, submit, and check the status of jobs using
          the Nomad CLI.
        </p>
      </div>
    </div>

    <div class="row">
      <div class="col-sm-12">
        <div class="terminal">
          <span class="circle"><%= inline_svg "terminal-circle.svg" %></span>
          <span class="circle"><%= inline_svg "terminal-circle.svg" %></span>
          <span class="circle"><%= inline_svg "terminal-circle.svg" %></span>
          <div class="terminal-content">
            <span>
              <span class="text-green">admin@hashicorp.com:</span>
              <span>nomad init</span>
            </span>
            <span>Example job file written to example.nomad</span>
            <span>&nbsp;</span>
            <span>
              <span class="text-green">admin@hashicorp.com:</span>
              <span>nomad validate example.nomad</span>
            </span>
            <span>Job validation successful</span>
            <span>&nbsp;</span>
            <span>
              <span class="text-green">admin@hashicorp.com:</span>
              <span>nomad run example.nomad</span>
            </span>
            <span>==> Monitoring evaluation "feb23392"</span>
            <span class="pre">    Evaluation triggered by job "example"</span>
            <span class="pre">    Evaluation within deployment: "7ffa7ed1"</span>
            <span class="pre">    Allocation "a2f24fcf" created: node "3714a84a", group "cache"</span>
            <span class="pre">    Evaluation status changed: "pending" -> "complete"</span>
            <span>==> Evaluation "feb23392" finished with status "complete"</span>
            <span>&nbsp;</span>
            <span>
              <span class="text-green">admin@hashicorp.com:</span>
              <span>nomad status</span>
            </span>
            <span class="pre">ID       Type     Priority  Status   Submit Date</span>
            <span class="pre">example  service  50        running  <%= Time.now.strftime("%m/%d/%y %H:%M:%S %Z") %></span>
          </div>
        </div>
      </div>
    </div>

    <div class="row">
      <div class="col-sm-12">
        <h3>Plan Changes</h3>
        <p>
          Perform a dry-run to check application placement, scheduling
          decisions, and visualize failures before they happen.
        </p>
      </div>
    </div>

    <div class="row">
      <div class="col-sm-12">
        <div class="terminal">
          <span class="circle"><%= inline_svg "terminal-circle.svg" %></span>
          <span class="circle"><%= inline_svg "terminal-circle.svg" %></span>
          <span class="circle"><%= inline_svg "terminal-circle.svg" %></span>
          <div class="terminal-content">
            <span>
              <span class="text-green">admin@hashicorp.com:</span>
              <span>nomad plan example.nomad</span>
            </span>
            <span class="pre"><span class="text-orange">+/-</span> <span class="text-bold">Job: "example"</span></span>
            <span class="pre"><span class="text-bold text-orange">+/-</span> <span class="text-bold">Task Group: "cache"</span> (<span class="text-green">2 create</span>, <span class="text-blue">1 in-place update</span>)</span>
            <span class="pre">  <span class="text-orange">+/-</span> Count: "1" => "3" (<span class="text-green">forces create</span>)</span>
            <span class="pre">      <span class="text-bold">Task: "redis"</span></span>
            <span>&nbsp;</span>
            <span class="pre"><span class="text-bold">Scheduler dry-run:</span></span>
            <span class="pre"><span class="text-bold text-green">- All tasks successfully allocated.</span></span>
            <span>&nbsp;</span>
            <span class="pre"><span class="text-bold">Job Modify Index: 7</span></span>
            <span>&nbsp;</span>
            <span>
              <span class="text-green">admin@hashicorp.com:</span>
              <span>nomad run -check-index 7 example.nomad</span>
            </span>
            <span>==> Monitoring evaluation "e338a6ae"</span>
            <span class="pre">    Evaluation triggered by job "example"</span>
            <span class="pre">    Evaluation within deployment: "43310206"</span>
            <span class="pre">    Allocation "991a0d89" created: node "c5916a99", group "cache"</span>
            <span class="pre">    Allocation "daee8be1" created: node "c5916a99", group "cache"</span>
            <span class="pre">    Allocation "83f29312" modified: node "c5916a99", group "cache"</span>
            <span class="pre">    Evaluation status changed: "pending" -> "complete"</span>
            <span>==> Evaluation "e338a6ae" finished with status "complete"</span>
          </div>
        </div>
      </div>
    </div>

    <div class="row">
      <div class="col-sm-12">
        <h3>View Application Logs</h3>
        <p>
          Stream application logs directly in the terminal to help analyze and
          debug applications.
        </p>
      </div>
    </div>

    <div class="row">
      <div class="col-sm-12">
        <div class="terminal">
          <span class="circle"><%= inline_svg "terminal-circle.svg" %></span>
          <span class="circle"><%= inline_svg "terminal-circle.svg" %></span>
          <span class="circle"><%= inline_svg "terminal-circle.svg" %></span>
          <div class="terminal-content">
            <span>
              <span class="text-green">admin@hashicorp.com:</span>
              <span>nomad logs -tail -job example</span>
            </span>
            <span><%= Time.now.strftime("%d %b %H:%M:%S") %> # Server started, Redis version 3.2.9</span>
            <span><%= Time.now.strftime("%d %b %H:%M:%S") %> * The server is now ready to accept connections on port 6379</span>
          </div>
        </div>
      </div>
    </div>

    <div class="row">
      <div class="col-sm-12 col-lg-8 col-lg-offset-2">
        <p class="lead" align="center">
          The introduction contains a walkthrough guide, glossary, and a range
          of examples for learning and experimenting with Nomad.
        </p>
        <p align="center">
          <a href="/intro/index.html" class="button primary">Get Started</a>
        </p>
      </div>
    </div>
  </div>
</section>