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Adding test FILE-6394

This commit is contained in:
Sander 2020-03-28 19:23:00 +00:00
parent 603d5b16a2
commit 4732b640ae
1 changed files with 28 additions and 4 deletions
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32
include/tests_filesystems
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@ -689,11 +689,35 @@
#
#################################################################################
#
# Test : FILE-6394 TODO
# Test : FILE-6394
# Description : Check vm.swappiness (Linux)
# Want to contribute to Lynis? Create this test
Register --test-no FILE-6394 --os Linux --weight L --network NO --category security --description "Determine level of swappiness."
if [ ${SKIPTEST} -eq 0 ]; then
SWAPLEVEL=$(${CAT_BINARY} /proc/sys/vm/swappiness)
LogText "Test: checking level of vm.swappiness: ${SWAPLEVEL}"
PHYSDISK=$(${LSBLKBINARY} | ${GREPBINARY} -E 'disk|SWAP' | ${GREPBINARY} -B1 SWAP | ${HEADBINARY} -n1 | ${AWKBINARY} '{print $1}')
if [ ${SWAPLEVEL} -gt 60 ]; then
LogText "Result: vm.swappiness=${SWAPLEVEL} meaning that swapping is more frequent than default."
# Check if swap is on a HDD or SDD for frequent swapping
if [ -d /sys/block/${PHYSDISK} ]; then
HDDORSDD=$(${CAT_BINARY} /sys/block/${PHYSDISK}/queue/rotational)
if [ ${HDDORSDD} -eq 1 ]; then
ReportSuggestion "${TEST_NO}" "vm.swappiness set to: ${SWAPLEVEL} > 60 (default) - consider installing an SSD for swap partition for better performance."
fi
fi
elif [ ${SWAPLEVEL} -eq 0 ]; then
LogText "Result: vm.swappiness=${SWAPLEVEL} meaning swapping is disabled."
ReportSuggestion "${TEST_NO}" "vm.swappiness set to: ${SWAPLEVEL}. Consider setting value to minimum of 1 for minimizing swappiness, but not quite disabling it. Will prevent OOM killer from killing processes when running out of physical memory."
elif [ ${SWAPLEVEL} -eq 1]; then
LogText "Result: vm.swappiness=${SWAPLEVEL} meaning that swapping can still occur but at very minimum."
elif [ ${SWAPLEVEL} -eq 10 ]; then
LogText "Result: vm.swappiness=${SWAPLEVEL} which is the preferred setting for database servers."
elif [ ${SWAPLEVEL} -lt 60 ]; then
LogText "Result: vm.swappiness=${SWAPLEVEL} meaning that swapping is less frequent than default. This is only recommended for servers."
else
LogText "Result: vm.swappiness=${SWAPLEVEL} which is the standard level of swappiness and works well for desktop systems."
fi
fi
#
#################################################################################
#