Starbeamrainbowlabs
61463167dd
This is important if we want Nomad to regulate and limit the amount of memory that jobs use.
39 lines
1.2 KiB
Bash
Executable file
39 lines
1.2 KiB
Bash
Executable file
#!/usr/bin/env bash
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check_cgroups_memory() {
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task_begin "Checking memory cgroups";
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cgroups_enabled="$(awk '/memory/ { print $2 }' < /proc/cgroups)";
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if [[ "${cgroups_enabled}" -ne 0 ]]; then
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echo ">>> memory cgroups already enabled";
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return 0;
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fi
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filepath_cmdline="/boot/cmdline.txt";
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if [[ ! -e "${filepath_cmdline}" ]]; then
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filepath_cmdline="/boot/firmware/cmdline.txt";
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fi
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if [[ ! -e "${filepath_cmdline}" ]]; then
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echo ">>> Failed to find cmdline.txt; can't check for cgroups";
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return 1;
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fi
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if grep -q cgroup_enable=memory /boot/cmdline.txt; then
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echo ">>> memory cgroups already present in cmdline.txt, a reboot is required to apply the update";
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return 0;
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fi
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echo ">>> memory cgroups not present in cmdline.txt, enabling....";
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(tr -d '\n' <"${filepath_cmdline}" && echo " cgroup_enable=memory cgroup_memory=1") | sudo tee "${filepath_cmdline}.new";
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sudo mv "${filepath_cmdline}" "${filepath_cmdline}.old-$(date +"%Y-%m-%d")";
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sudo mv "${filepath_cmdline}.new" "${filepath_cmdline}";
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echo ">>> New contents of cmdline.txt:";
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cat "${filepath_cmdline}";
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echo ">>> A reboot is required to apply the changes.";
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task_end "$?" "Failed to check memory cgroups"
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}
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