Prerequisites

Prerequisites

Before you start updating the OpenContrail nodes of your MCP cluster, complete the following prerequisite steps:

  1. Configure the server and client backup roles for Cassandra and ZooKeeper as described in OpenContrail 4.x: Create a backup schedule for a Cassandra database and OpenContrail 4.x: Create a backup schedule for a ZooKeeper database.

  2. Verify that all OpenContrail services are up and running on all OpenContrail nodes. See Verify the OpenContrail status.

    Note

    If you update MCP from version 2019.2.3, the contrail-webui service may be in the inactive state due to the missing quotation mark in /etc/contrail/config.global.js. To fix the issue, see: MCP 2019.2.3 maintenance updates.

  3. Verify that you have enough free disk space on the OpenContrail ntw* and nal* nodes since the update pipeline job will download a new version of Docker images. The required disk utilization must not exceed 80% on each target node.

Once done, proceed to Prepare the cluster model.