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Chapter 13. Configuring automatic crash dumps by using RHEL system roles
To manage kdump using Ansible, you can use the kdump role, which is one of the RHEL system roles available in RHEL 8.
Using the kdump role enables you to specify where to save the contents of the system’s memory for later analysis.
13.1. Configuring the kernel crash dumping mechanism by using the kdump RHEL system role
You can set basic kernel dump parameters on multiple systems by using the kdump system role by running an Ansible playbook.
The kdump Systeme 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
- You have prepared the control node and the managed nodes.
- You are logged in to the control node as a user who can run playbooks on the managed nodes.
-
The account you use to connect to the managed nodes has
sudopermissions on them.
Procedure
Create a playbook file, for example
~/playbook.yml, with the following content:--- - hosts: managed-node-01.example.com roles: - rhel-system-roles.kdump vars: kdump_path: /var/crashValidate the playbook syntax:
$ ansible-playbook --syntax-check ~/playbook.ymlNote that this command only validates the syntax and does not protect against a wrong but valid configuration.
Run the playbook:
$ ansible-playbook ~/playbook.yml
Additional resources
-
/usr/share/ansible/roles/rhel-system-roles.kdump/README.mdfile -
/usr/share/doc/rhel-system-roles/kdump/directory
