Chapter 13. Configuring kdump in the web console
The following sections provide an overview of how to setup and test the
kdump configuration through the Red Hat Enterprise Linux web console. The web console is part of a default installation of Red Hat Enterprise Linux 8 and enables or disables the
kdump service at boot time. Further, the web console conveniently enables you to configure the reserved memory for
kdump; or to select the vmcore saving location in an uncompressed or compressed format.
- See Red Hat Enterprise Linux web console for further details.
13.1. Configuring kdump memory usage and target location in web console
The procedure below shows you how to use the
Kernel Dump tab in the Red Hat Enterprise Linux web console interface to configure the amount of memory that is reserved for the kdump kernel. The procedure also describes how to specify the target location of the vmcore dump file and how to test your configuration.
- Introduction to operating the web console
Kernel Dumptab and start the
kdumpmemory usage through the command line.
Click the link next to the
Crash dump locationoption.
Local Filesystemoption from the drop-down and specify the directory you want to save the dump in.
Alternatively, select the
Remote over SSHoption from the drop-down to send the vmcore to a remote machine using the SSH protocol.
ssh key, and
Directoryfields with the remote machine address, ssh key location, and a target directory.
Another choice is to select the
Remote over NFSoption from the drop-down and fill the
Mountfield to send the vmcore to a remote machine using the NFS protocol.Note
Compressioncheck box to reduce the size of the vmcore file.
Test your configuration by crashing the kernel.Warning
This step disrupts execution of the kernel and results in a system crash and loss of data.
For a complete list of currently supported targets for
kdump, see Supported kdump targets.
- For information on how to configure an SSH server and set up a key-based authentication, see Using secure communications between two systems with OpenSSH.