Hi Eduard,
On 1/7/19 10:53 PM, Eduard Bloch wrote:> * Darshaka Pathirana [Mon, Jan 07 2019, 07:30:24PM]:
>> Package: wnpp
>> Severity: wishlist
>> Owner: Darshaka Pathirana <dpat@syn-net.org>
>>
>> * Package name : kthresher
>> Version : 1.3.1
>> Upstream Author : Rackspace US, Inc.
>> * URL : https://github.com/rackerlabs/kthresher
>> * License : Apache
>> Programming Lang: Python
>> Description : Purge Unused Kernels
>>
>> Tool to remove unused kernels that were installed automatically
>> This tool removes those kernel packages marked as candidate for autoremoval.
>> Those packages are generally installed via Unattended upgrade or
>> meta-packages. By default the latest kernel and manual installations are
>> marked to Never Auto Remove.
>
> Please point out the difference to "deborphan --guess-kernel" somewhere
> along the lines.
I've forwarded your question to the upstream developer Tony Garcia
<tony.garcia@RACKSPACE.COM> and this is his answer:
,----
| Here the response with deborphan, first of all I acknowledge I was not aware of
| this package, but after poking a bit with it I wasn't able to find a way to do
| what kthresher does, few points:
|
| - kthresher is focused on kernel images and headers
| - deborphan is focused on libraries with extension to other type of packages,
| there is one related to kernels but is only kernel modules:
|
| # deborphan --help | grep kernel
| --guess-kernel Try to report kernel modules.
|
| Man pages explains that it tries to find kernel modules only, not kernel
| images:
|
| --guess-kernel This option tries to find kernel-modules. It tries to match (-modules|^nvidia-kernel)-.*[0-9]+\.[0-9]+\.[0-9]+.
|
|
| - kthresher will only remove packages listed as candidates for autoremoval,
| will not remove: running kernel, latest kernel nor unexplicitly kernels
| installed.
| - Did not find a way to remove kernels with deborphan.
| - kthresher is meant to be executed through a cronjob/timer to purge old
| kernels on a nightly basis
|
| This is an example of both (kthresher and deborphan) being executed on a server with multiple kernels:
|
| # deborphan --guess-kernel
| libxapian30
| libxenstore3.0
|
| ## Here kthresher is showing the available kernel packages for autoremoval:
|
| # python3 kthresher.py -s
| INFO: List of kernel packages available for autoremoval:
| INFO: Version Package
| INFO: 4.9.30-2+deb9u5 linux-headers-4.9.0-3-all-amd64
| INFO: 4.9.30-2+deb9u5 linux-headers-4.9.0-3-amd64
| INFO: 4.9.30-2+deb9u5 linux-headers-4.9.0-3-common
| INFO: 4.9.30-2+deb9u5 linux-headers-4.9.0-3-common-rt
| INFO: 4.9.30-2+deb9u5 linux-headers-4.9.0-3-rt-amd64
| INFO: 4.9.65-3+deb9u1 linux-headers-4.9.0-4-all-amd64
| INFO: 4.9.65-3+deb9u1 linux-headers-4.9.0-4-amd64
| INFO: 4.9.65-3+deb9u1 linux-headers-4.9.0-4-common
| INFO: 4.9.65-3+deb9u1 linux-headers-4.9.0-4-common-rt
| INFO: 4.9.65-3+deb9u1 linux-headers-4.9.0-4-rt-amd64
| INFO: 4.9.65-3+deb9u2 linux-headers-4.9.0-5-all-amd64
| INFO: 4.9.65-3+deb9u2 linux-headers-4.9.0-5-amd64
| INFO: 4.9.65-3+deb9u2 linux-headers-4.9.0-5-common
| INFO: 4.9.65-3+deb9u2 linux-headers-4.9.0-5-common-rt
| INFO: 4.9.65-3+deb9u2 linux-headers-4.9.0-5-rt-amd64
| INFO: 4.9.88-1+deb9u1 linux-headers-4.9.0-6-all-amd64
| INFO: 4.9.110-3+deb9u2 linux-headers-4.9.0-7-all-amd64
| INFO: 4.9.30-2+deb9u5 linux-image-4.9.0-3-amd64
| INFO: 4.9.30-2+deb9u5 linux-image-4.9.0-3-rt-amd64
| INFO: 4.9.65-3+deb9u1 linux-image-4.9.0-4-amd64
| INFO: 4.9.65-3+deb9u1 linux-image-4.9.0-4-rt-amd64
| INFO: 4.9.65-3+deb9u2 linux-image-4.9.0-5-amd64
| INFO: 4.9.65-3+deb9u2 linux-image-4.9.0-5-rt-amd64
|
| ## Here kthresher is attempting to remove all the candidates of headers and
| ## images for autoremoval keeping 0 (dry-run)
|
| # python3 kthresher.py -v -d -H -k0
| INFO: Attempting to read /etc/kthresher.conf.
| INFO: Config file /etc/kthresher.conf is empty or does not exist, ignoring.
| INFO: Options: {'purge': False, 'headers': True, 'keep': 0, 'verbose': True, 'dry_run': True}
| INFO: ----- DRY RUN -----
| INFO: Running kernel is linux-image-4.9.0-7-amd64 v[4.9.110-1]
| INFO: Attempting to keep 0 kernel package(s)
| INFO: Found 5 kernel image(s) installed and available for autoremoval
| INFO: Pre-sorting: ['4.9.88-1+deb9u1', '4.9.65-3+deb9u1', '4.9.30-2+deb9u5', '4.9.65-3+deb9u2', '4.9.110-3+deb9u2']
| INFO: Post-sorting: ['4.9.30-2+deb9u5', '4.9.65-3+deb9u1', '4.9.65-3+deb9u2', '4.9.88-1+deb9u1', '4.9.110-3+deb9u2']
| INFO: Purging packages from version: 4.9.30-2+deb9u5
| INFO: Purging: linux-image-4.9.0-3-amd64
| INFO: Purging: linux-image-4.9.0-3-rt-amd64
| INFO: Purging: linux-headers-4.9.0-3-all-amd64
| INFO: Purging: linux-headers-4.9.0-3-amd64
| INFO: Purging: linux-headers-4.9.0-3-common
| INFO: Purging: linux-headers-4.9.0-3-common-rt
| INFO: Purging: linux-headers-4.9.0-3-rt-amd64
| INFO: Purging packages from version: 4.9.65-3+deb9u1
| INFO: Purging: linux-image-4.9.0-4-amd64
| INFO: Purging: linux-image-4.9.0-4-rt-amd64
| INFO: Purging: linux-headers-4.9.0-4-all-amd64
| INFO: Purging: linux-headers-4.9.0-4-amd64
| INFO: Purging: linux-headers-4.9.0-4-common
| INFO: Purging: linux-headers-4.9.0-4-common-rt
| INFO: Purging: linux-headers-4.9.0-4-rt-amd64
| INFO: Purging packages from version: 4.9.65-3+deb9u2
| INFO: Purging: linux-image-4.9.0-5-amd64
| INFO: Purging: linux-image-4.9.0-5-rt-amd64
| INFO: Purging: linux-headers-4.9.0-5-all-amd64
| INFO: Purging: linux-headers-4.9.0-5-amd64
| INFO: Purging: linux-headers-4.9.0-5-common
| INFO: Purging: linux-headers-4.9.0-5-common-rt
| INFO: Purging: linux-headers-4.9.0-5-rt-amd64
| INFO: Purging packages from version: 4.9.88-1+deb9u1
| INFO: Purging: linux-headers-4.9.0-6-all-amd64
| INFO: Purging packages from version: 4.9.110-3+deb9u2
| INFO: Purging: linux-headers-4.9.0-7-all-amd64
|
|
| I wasn't able to remove packages with deborphan but seems like the main task of
| this tool is to find packages that are might not bee needed but does not seem
| to have a way to remove packages through it, you will need to use another tool
| to then remove those packages.
|
`----
I hope his reply did answer you question.
Regards,
- Darsha
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