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Chapter 5. Configuring Tracer and application restarts on hosts
If Tracer is available for your hosts, you can see which services need restarts after package updates and restart them when you choose.
5.1. Configuring Tracer on a host
You can install Tracer on hosts and access Traces on Satellite. Tracer displays a list of outdated services and applications that need to be restarted, as well as asks you to restart the host after, for example, a kernel update. Traces is the output generated by Tracer in the Satellite web UI.
Prerequisites
- The host is registered to Red Hat Satellite.
- Red Hat Satellite Client 6 repository for the operating system version of the host is synchronized on Satellite Server, available in the content view and the lifecycle environment of the host, and enabled for the host. For more information, see Changing the repository sets status for a host in Satellite in Managing content.
- Remote execution is enabled.
Procedure
- In the Satellite web UI, navigate to Hosts > All Hosts.
- Select your host.
- On the Traces tab, click Enable Traces.
-
Select the provider to install
katello-host-tools-tracerfrom the list. - Click Enable Tracer. You get a REX job notification after the remote execution job is complete.
- If you get a list of applications that need to be restarted, select the ones that you want to restart.
Click Restart app, then click one of these buttons:
- Restart via remote execution
Restart via customized remote execution
The first option restarts the application immediately, while the second one allows you to examine and customize the REX job.
5.2. Restarting applications on a host
You can restart applications on a host from the Satellite web UI when the host reports pending restarts, for example after package updates. Satellite uses remote execution to restart applications on the host.
Procedure
- In the Satellite web UI, navigate to Hosts > All Hosts.
- Click the name of the host you want to modify.
- Select the Traces tab.
- Select applications that you want to restart.
- Select Restart via remote execution from the Restart app list. You will get a REX job notification once the remote execution job is complete.
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