No edit summary |
No edit summary |
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| Line 41: | Line 41: | ||
== How To Test == | == How To Test == | ||
Enable the following config lines in /etc/kdump.conf | Enable some of the following config lines in /etc/kdump.conf | ||
* Dump to local file system | * Dump to local file system | ||
ext3 LABEL=/boot | ext3 LABEL=/boot | ||
ext3 /dev/sda1 | ext3 /dev/sda1 | ||
ext4 UUID=03138356-5e61-4ab3-b58e-27507ac41937 | ext4 UUID=03138356-5e61-4ab3-b58e-27507ac41937 | ||
* Dump to remote machines | * Dump to remote machines | ||
net my.server.com:/path | net my.server.com:/path | ||
net user@remote.server.com | net user@remote.server.com | ||
| Line 56: | Line 60: | ||
* Other configs | * Other configs | ||
core_collector makedumpfile -c --message-level 1 | core_collector makedumpfile -c --message-level 1 | ||
core_collector cp | core_collector cp | ||
kdump_post /var/crash/scripts/kdump-post.sh | kdump_post /var/crash/scripts/kdump-post.sh | ||
extra_bins /bin/cp | extra_bins /bin/cp | ||
disk_timeout 30 | disk_timeout 30 | ||
extra_modules gfs2 | extra_modules gfs2 | ||
options modulename options | options modulename options | ||
default shell | |||
default shell/reboot/shutdown | |||
Trigger a crash and see if the vmcore is dumped to the right place. | Trigger a crash and see if the vmcore is dumped to the right place. | ||
| Line 90: | Line 101: | ||
== Documentation == | == Documentation == | ||
* Not applicable, because we don't | * Not applicable, because we don't have any documentations for this replacement. | ||
== Release Notes == | == Release Notes == | ||
<!-- The Fedora Release Notes inform end-users about what is new in the release. Examples of past release notes are here: http://docs.fedoraproject.org/release-notes/ --> | <!-- The Fedora Release Notes inform end-users about what is new in the release. Examples of past release notes are here: http://docs.fedoraproject.org/release-notes/ --> | ||
<!-- The release notes also help users know how to deal with platform changes such as ABIs/APIs, configuration or data file formats, or upgrade concerns. If there are any such changes involved in this feature, indicate them here. You can also link to upstream documentation if it satisfies this need. This information forms the basis of the release notes edited by the documentation team and shipped with the release. --> | <!-- The release notes also help users know how to deal with platform changes such as ABIs/APIs, configuration or data file formats, or upgrade concerns. If there are any such changes involved in this feature, indicate them here. You can also link to upstream documentation if it satisfies this need. This information forms the basis of the release notes edited by the documentation team and shipped with the release. --> | ||
* | * /sbin/mkdumprd has been replaced by new code, which uses dracut to generate the initrd for kdump kernel. | ||
== Comments and Discussion == | == Comments and Discussion == | ||
Revision as of 11:19, 11 July 2011
New mkdumprd for kdump
Summary
This is a replacement for mkdumprd of kexec-tools, to switch to dracut to generate the initrd for kdump kernel.
Owner
- Name: Cong Wang
- Email: <amwang at redhat dot com>
Current status
- Targeted release: Fedora 16
- Last updated: 2011-07-11
- Percentage of completion: 10%
Working:
- Dump to local filesystem
TODO:
- Read /etc/kdump.conf to generate initrd
- Dump to remote host via ssh
- Dump to remote host via nfs
- Dump to raw block device
- Implement full functionality of /etc/kdump.conf
- Dump to multiple targets
Detailed Description
Currently in kexec-tools we use our own /sbin/mkdumprd to generate an initrd for kdump kernel. However, due to the natural complexity of making a new initrd, we have lots of burdens to maintain the mkdumprd code, we decide to switch to using dracut to generate kdump initrd. And hopefully, we can provide a distro-independent mkdumprd to upstream, as dracut itself is cross-distribution.
Benefit to Fedora
The main source of kexec-tools bugs is in mkdumprd, with this change, hopefully we will reduce the number of bugs of kexec-tools.
Scope
All functionality of /sbin/mkdumprd has to be implemented and tested in this new mkdumprd.
How To Test
Enable some of the following config lines in /etc/kdump.conf
- Dump to local file system
ext3 LABEL=/boot
ext3 /dev/sda1
ext4 UUID=03138356-5e61-4ab3-b58e-27507ac41937
- Dump to remote machines
net my.server.com:/path
net user@remote.server.com
- Dump to raw block device
raw /dev/sda5
- Other configs
core_collector makedumpfile -c --message-level 1
core_collector cp
kdump_post /var/crash/scripts/kdump-post.sh
extra_bins /bin/cp
disk_timeout 30
extra_modules gfs2
options modulename options
default shell/reboot/shutdown
Trigger a crash and see if the vmcore is dumped to the right place.
User Experience
Users should not notice the replacement, because we plan to provide full backward compatibility.
Dependencies
Dracut
Contingency Plan
Fallback to old /sbin/mkdumprd.
Documentation
- Not applicable, because we don't have any documentations for this replacement.
Release Notes
- /sbin/mkdumprd has been replaced by new code, which uses dracut to generate the initrd for kdump kernel.
Comments and Discussion
- Not applicable, because the main discussion is in a Red Hat internal mailing list.