modify kernel parameters

[Peter Zoltan Keresztes]

Hello,

I want to set a kernel parameter on coreos. I have created a file in /etc/sysctl.d/ called vm_maxmem.conf with the following value vm.max_map_count = 2147483648 .

When I restart the systemd-sysctl.service it fails with the following error:

-- Unit systemd-sysctl.service has begun starting up.

Jul 17 20:23:48 core.z0z0.tk systemd-sysctl[779]: Couldn't write '2147483648' to 'vm/max_map_count', ignoring: Invalid argument

Jul 17 20:23:48 core.z0z0.tk systemd[1]: systemd-sysctl.service: Main process exited, code=exited, status=1/FAILURE

Jul 17 20:23:48 core.z0z0.tk systemd[1]: Failed to start Apply Kernel Variables.

-- Subject: Unit systemd-sysctl.service has failed

-- Defined-By: systemd

-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel

-- 

-- Unit systemd-sysctl.service has failed.

-- 

-- The result is failed.

Jul 17 20:23:48 core.z0z0.tk systemd[1]: systemd-sysctl.service: Unit entered failed state.

Jul 17 20:23:48 core.z0z0.tk sudo[768]: pam_unix(sudo:session): session closed for user root

Jul 17 20:23:48 core.z0z0.tk systemd[1]: systemd-sysctl.service: Failed with result 'exit-code'.

Jul 17 20:23:48 core.z0z0.tk systemd-tmpfiles[769]: [/usr/lib64/tmpfiles.d/trousers.conf:1] Duplicate line for path "/var/lib/tpm", ignoring.

Jul 17 20:23:48 core.z0z0.tk systemd-tmpfiles[769]: [/usr/lib64/tmpfiles.d/var.conf:20] Duplicate line for path "/var/lib", ignoring.

Jul 17 20:23:48 core.z0z0.tk systemd[1]: Started Cleanup of Temporary Directories.

-- Subject: Unit systemd-tmpfiles-clean.service has finished start-up

-- Defined-By: systemd

-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel

Any suggestion on how to make this work?

Thanks in advance

Peter

[Brandon Philips]

Hello Peter-

I am not in front of a machine to try this out but two ideas:

1) Is that a valid value? Can you set it manually through /proc/sys?

2) Perhaps replace the underscore with a dash? 

Cheers,

Brandon

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