Software updates and rollbacks

You can update the Nozomi Networks software to a newer release, or roll it back to a previous release on physical or virtual sensors.

Before you do an update, or a rollback, Nozomi Networks recommends that you do a full backup.

Updates

You can use an update file to easily update Guardian sensors, Central Management Console (CMC)s, and Remote Collectors, and works for all physical and virtual deployments.

Note:
You need to use different update commands and procedures for container installations. For more details, see Install a sensor in a Docker container.

You cannot update to a version that is more than one major version ahead of your current version. For example, you cannot update from version 23.0.0 to 25.0.0. Before you update a sensor, refer to the Update remarks topic in the Release Notes, which recommend update paths.

Important:
Manually scheduled updates apply regardless of whether the version is locked, or the update policy is disabled.
Updates will not occur if:
  • In the CMC, the sensor is locked
  • In the CMC, the sensor Update Policy is set to Do not update sensors
  • The attempt to update a sensor returns this message: Execution of the software update is taking longer than expected. Please wait for the process to finish or verify the status of the process by accessing the sensor via SSH. If this error persists contact Nozomi Networks Support for assistance.
    Note:
    In certain cases, such as simultaneous human interventions, multiple concurrent install_update commands might have been issued. A new process has been implemented to prevent multiple instances of the install_update command from being executed simultaneously. If this new process is actively trying to prevent multiple, simultaneous updates while no update is actually in progress, it means the sensor’s ability to update has been impacted. In this case, a rebooting of the sensor will disengage this process and will return the sensor’s ability to update to a fully functional state.

Rollbacks

When you rollback to a release that was previously installed, all data is migrated back to the previous format.