Chapter 19. Configuring automatic crash dumps by using the kdump RHEL System Role
To manage kdump using Ansible, you can use the kdump role, which is one of the RHEL System Roles available in RHEL 7.9.
Using the kdump role enables you to specify where to save the contents of the system’s memory for later analysis.
19.1. The kdump RHEL System Role
The kdump System Role enables you to set basic kernel dump parameters on multiple systems.
19.2. kdump role parameters
The parameters used for the kdump RHEL System Roles are:
| Role Variable | Description |
|---|---|
| kdump_path |
The path to which |
Additional resources
- The makedumpfile(8) man page.
-
For details about the parameters used in
kdumpand additional information about thekdumpSystem Role, see the/usr/share/ansible/roles/rhel-system-roles.tlog/README.mdfile.
19.3. Configuring kdump using RHEL System Roles
You can set basic kernel dump parameters on multiple systems using the kdump System Role by running an Ansible playbook.
The kdump role replaces the kdump configuration of the managed hosts entirely by replacing the /etc/kdump.conf file. Additionally, if the kdump role is applied, all previous kdump settings are also replaced, even if they are not specified by the role variables, by replacing the /etc/sysconfig/kdump file.
Prerequisites
- The Ansible Core package is installed on the control machine.
-
You have the
rhel-system-rolespackage installed on the system from which you want to run the playbook. -
You have an inventory file which lists the systems on which you want to deploy
kdump.
Procedure
Create a new
playbook.ymlfile with the following content:--- - hosts: kdump-test vars: kdump_path: /var/crash roles: - rhel-system-roles.kdumpOptional: Verify playbook syntax.
# ansible-playbook --syntax-check playbook.ymlRun the playbook on your inventory file:
# ansible-playbook -i inventory_file /path/to/file/playbook.yml
Additional resources
-
For a detailed reference on
kdumprole variables, see the README.md or README.html files in the /usr/share/doc/rhel-system-roles/kdump directory. - See Preparing the control node and managed nodes to use RHEL System Roles
-
Documentation installed with the
rhel-system-rolespackage/usr/share/ansible/roles/rhel-system-roles.kdump/README.html
