10.3. Bundles - Isolated Environments

⁠10.3. Bundles - Isolated Environments

Pacemaker supports a special syntax for launching a container with any infrastructure it requires: the bundle.

Pacemaker bundles support Docker, podman, and rkt container technologies. ⁠^[17]

Example 10.12. A bundle for a containerized web server

<bundle id="httpd-bundle">
   <podman image="pcmk:http" replicas="3"/>
   <network ip-range-start="192.168.122.131"
            host-netmask="24"
            host-interface="eth0">
      <port-mapping id="httpd-port" port="80"/>
   </network>
   <storage>
      <storage-mapping id="httpd-syslog"
                       source-dir="/dev/log"
                       target-dir="/dev/log"
                       options="rw"/>
      <storage-mapping id="httpd-root"
                       source-dir="/srv/html"
                       target-dir="/var/www/html"
                       options="rw,Z"/>
      <storage-mapping id="httpd-logs"
                       source-dir-root="/var/log/pacemaker/bundles"
                       target-dir="/etc/httpd/logs"
                       options="rw,Z"/>
   </storage>
   <primitive class="ocf" id="httpd" provider="heartbeat" type="apache"/>
</bundle>

⁠10.3.1. Bundle Prerequisites

Before configuring a bundle in Pacemaker, the user must install the appropriate container launch technology (Docker, podman, or rkt), and supply a fully configured container image, on every node allowed to run the bundle.

Pacemaker will create an implicit resource of type ocf:heartbeat:docker, ocf:heartbeat:podman, or ocf:heartbeat:rkt to manage a bundle’s container. The user must ensure that the appropriate resource agent is installed on every node allowed to run the bundle.

^[17] Docker is a trademark of Docker, Inc. No endorsement by or association with Docker, Inc. is implied.