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nitro_check_script.sh configure NVMe io_timeout #210
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added 22 commits
October 8, 2022 10:50
added support for debian/ubuntu checks
since modinfo -p doesn't always show the size of the parameter ie uint on operating systems like RHEL6
useless messages being sent to STDOUT
nvme module is determined
…DLINE_LINUX is set in /etc/default/grub and use the appropriate variable
rather than /boot/grub/grub.cfg
… /boot/grub/menu.lst respectively
…ck_cmd's have been defined
…ll fail to load the nvme driver at boot so using nvme.ko is preferred over simply looking for the string 'nvme'.
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Issue #, if available: None
Description of changes:
Update the nitro_check_script.sh bash script to include detection and configuration of nvme io_timeout kernel parameters in accordance with https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/nvme-ebs-volumes.html#timeout-nvme-ebs-volumes.
By configuring the check directly into the nitro_check_script.sh script, we can avoid nvme-related IO timeout (input/output) errors in future.
Checks and confirms which module is available with nvme_core taking precendence over nvme. io_timeout values are set according to the maximum supported by the parameter.
Uses tools such as grub2-mkconfig, grub-mkconfig, or grubby according to the operating system to modify kernel parameters.
Backs up any files that are modified ie /etc/default/grub, /boot/grub2/grub.cfg etc as /path/to/file.backup.$time_stamp to allow user to rollback any changes.
Tested against:
Debian 10
Debian 11
Ubuntu 14.04
Ubuntu 16.04
Ubuntu 18.04
Ubuntu 20.04
CentOS 6.10
CentOS 7.9
RHEL 6.10
RHEL 7.7
RHEL 8.2
Oracle Linux 7.5
SLES 12
SLES 15
AL1
AL2
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