terraform/website/source/layouts/openstack.erb

<% wrap_layout :inner do %>
  <% content_for :sidebar do %>
    <div class="docs-sidebar hidden-print affix-top" role="complementary">
      <ul class="nav docs-sidenav">
        <li<%= sidebar_current("docs-home") %>>
          <a href="/docs/index.html">&laquo; Documentation Home</a>
        </li>

        <li<%= sidebar_current("docs-openstack-index") %>>
          <a href="/docs/providers/openstack/index.html">OpenStack Provider</a>
        </li>

        <li<%= sidebar_current("docs-openstack-resource") %>>
          <a href="#">Resources</a>
          <ul class="nav nav-visible">
            <li<%= sidebar_current("docs-openstack-resource-compute-instance") %>>
              <a href="/docs/providers/openstack/r/compute_instance.html">openstack_compute_instance</a>
            </li>
            <li<%= sidebar_current("docs-openstack-resource-compute-keypair") %>>
              <a href="/docs/providers/openstack/r/compute_keypair.html">openstack_compute_keypair</a>
            </li>
            <li<%= sidebar_current("docs-openstack-resource-compute-secgroup") %>>
              <a href="/docs/providers/openstack/r/compute_secgroup.html">openstack_compute_keypair</a>
            </li>
            <li<%= sidebar_current("docs-openstack-resource-compute-secgrouprule") %>>
              <a href="/docs/providers/openstack/r/compute_secgrouprule.html">openstack_compute_keypair</a>
            </li>
          </ul>
        </li>
      </ul>
    </div>
  <% end %>

  <%= yield %>
  <% end %>