Pre-upgrade checklist

There is a list of pre-upgrade checks that will run after the upgrade version has been chosen. This checklist verifies if your cluster is ready for upgrade.

In the Cloudera Manager UI, under Getting Started for Upgrade Step in the Upgrade wizard, select the repository URL for upgrade. A pre-upgrade checklist will appear that verifies that the hosts and services in your cluster are ready for the upgrade.

Here is the pre-upgrade checklist:

Checklist	Description
Hosts check	This verifies the host health status, runs the host prerequisite inspections, and host warning inspections. Host Health Status- This check verifies that there are no hosts in bad health or concerning health. It also checks for any stopped roles on the hosts. Host Prerequisites Inspections - These are host inspections that must pass in order for you to proceed to upgrade. Currently the prerequisite inspection includes: EcsHostDnsInspection - Checks to make sure that there are less than three nameserver entries in the /etc/resolv.conf file, and checks the connections to the Cloudera Manager cluster and the CDP console. It also checks to see if vault.localhost.localdomain's ping can be resolved. If not, it is likely that the host /etc/nswitch.conf file is misconfigured. If this inspection fails: Check the /etc/resolv.conf and /etc/nswitch.conf files and ensure that /etc/resolv.conf does not contain three or more nameservers, and that /etc/nswitch.conf must contain myhostname under the hosts field. Check to see the connections are resolved correctly. If the connection to the CDP console fails, check to see if your DNS wildcard is configured properly. Host Warning Inspections - These are host inspections that are used to detect potential factors that can cause issues during an upgrade. Currently the warning inspections include: SecuritySoftwareInspection - Checks to make sure that ther are no security software processes running on the hosts in the cluster.
Services Health Check	This verifies that there are no services in bad or concerning health.

Checklist

Description

Hosts check

This verifies the host health status, runs the host prerequisite inspections, and host warning inspections.

Host Health Status- This check verifies that there are no hosts in bad health or concerning health. It also checks for any stopped roles on the hosts.
Host Prerequisites Inspections - These are host inspections that must pass in order for you to proceed to upgrade. Currently the prerequisite inspection includes:
- EcsHostDnsInspection - Checks to make sure that there are less than three nameserver entries in the /etc/resolv.conf file, and checks the connections to the Cloudera Manager cluster and the CDP console. It also checks to see if vault.localhost.localdomain's ping can be resolved. If not, it is likely that the host /etc/nswitch.conf file is misconfigured.
  If this inspection fails:
  - Check the /etc/resolv.conf and /etc/nswitch.conf files and ensure that /etc/resolv.conf does not contain three or more nameservers, and that /etc/nswitch.conf must contain myhostname under the hosts field.
  - Check to see the connections are resolved correctly. If the connection to the CDP console fails, check to see if your DNS wildcard is configured properly.
Host Warning Inspections - These are host inspections that are used to detect potential factors that can cause issues during an upgrade. Currently the warning inspections include:
- SecuritySoftwareInspection - Checks to make sure that ther are no security software processes running on the hosts in the cluster.

Services Health Check

This verifies that there are no services in bad or concerning health.