Ich verwende das folgende Skript, das funktioniert großartig. Es werden cgroups through verwendet cgmanager. Update: Es werden nun die Befehle von verwendet cgroup-tools. Benennen Sie dieses Skript limitmemund fügen Sie es in Ihr $ PATH ein, und Sie können es wie folgt verwenden limitmem 100M bash. Dies schränkt sowohl die Speicher- als auch die Auslagerungsnutzung ein. Um nur den Speicher zu begrenzen, entfernen Sie die Zeile mit memory.memsw.limit_in_bytes.
Bearbeiten: Bei Standard-Linux-Installationen wird dadurch nur die Speichernutzung begrenzt, nicht die Auslagerungsnutzung. Um die Beschränkung der Swap-Nutzung zu aktivieren, müssen Sie die Swap-Abrechnung auf Ihrem Linux-System aktivieren. Tun Sie das , indem Sie / Hinzufügen swapaccount=1in /etc/default/grubso sieht es so etwas wie
GRUB_CMDLINE_LINUX="swapaccount=1"
Dann starten sudo update-grubund neu starten .
Haftungsausschluss: Es würde mich nicht wundern, wenn cgroup-toolsauch in Zukunft Pausen entstehen. Die richtige Lösung wäre, die systemd-APIs für die Gruppenverwaltung zu verwenden, aber es gibt keine Befehlszeilentools für diese atm
#!/bin/sh
# This script uses commands from the cgroup-tools package. The cgroup-tools commands access the cgroup filesystem directly which is against the (new-ish) kernel's requirement that cgroups are managed by a single entity (which usually will be systemd). Additionally there is a v2 cgroup api in development which will probably replace the existing api at some point. So expect this script to break in the future. The correct way forward would be to use systemd's apis to create the cgroups, but afaik systemd currently (feb 2018) only exposes dbus apis for which there are no command line tools yet, and I didn't feel like writing those.
# strict mode: error if commands fail or if unset variables are used
set -eu
if [ "$#" -lt 2 ]
then
echo Usage: `basename $0` "<limit> <command>..."
echo or: `basename $0` "<memlimit> -s <swaplimit> <command>..."
exit 1
fi
cgname="limitmem_$$"
# parse command line args and find limits
limit="$1"
swaplimit="$limit"
shift
if [ "$1" = "-s" ]
then
shift
swaplimit="$1"
shift
fi
if [ "$1" = -- ]
then
shift
fi
if [ "$limit" = "$swaplimit" ]
then
memsw=0
echo "limiting memory to $limit (cgroup $cgname) for command $@" >&2
else
memsw=1
echo "limiting memory to $limit and total virtual memory to $swaplimit (cgroup $cgname) for command $@" >&2
fi
# create cgroup
sudo cgcreate -g "memory:$cgname"
sudo cgset -r memory.limit_in_bytes="$limit" "$cgname"
bytes_limit=`cgget -g "memory:$cgname" | grep memory.limit_in_bytes | cut -d\ -f2`
# try also limiting swap usage, but this fails if the system has no swap
if sudo cgset -r memory.memsw.limit_in_bytes="$swaplimit" "$cgname"
then
bytes_swap_limit=`cgget -g "memory:$cgname" | grep memory.memsw.limit_in_bytes | cut -d\ -f2`
else
echo "failed to limit swap"
memsw=0
fi
# create a waiting sudo'd process that will delete the cgroup once we're done. This prevents the user needing to enter their password to sudo again after the main command exists, which may take longer than sudo's timeout.
tmpdir=${XDG_RUNTIME_DIR:-$TMPDIR}
tmpdir=${tmpdir:-/tmp}
fifo="$tmpdir/limitmem_$$_cgroup_closer"
mkfifo --mode=u=rw,go= "$fifo"
sudo -b sh -c "head -c1 '$fifo' >/dev/null ; cgdelete -g 'memory:$cgname'"
# spawn subshell to run in the cgroup. If the command fails we still want to remove the cgroup so unset '-e'.
set +e
(
set -e
# move subshell into cgroup
sudo cgclassify -g "memory:$cgname" --sticky `sh -c 'echo $PPID'` # $$ returns the main shell's pid, not this subshell's.
exec "$@"
)
# grab exit code
exitcode=$?
set -e
# show memory usage summary
peak_mem=`cgget -g "memory:$cgname" | grep memory.max_usage_in_bytes | cut -d\ -f2`
failcount=`cgget -g "memory:$cgname" | grep memory.failcnt | cut -d\ -f2`
percent=`expr "$peak_mem" / \( "$bytes_limit" / 100 \)`
echo "peak memory used: $peak_mem ($percent%); exceeded limit $failcount times" >&2
if [ "$memsw" = 1 ]
then
peak_swap=`cgget -g "memory:$cgname" | grep memory.memsw.max_usage_in_bytes | cut -d\ -f2`
swap_failcount=`cgget -g "memory:$cgname" |grep memory.memsw.failcnt | cut -d\ -f2`
swap_percent=`expr "$peak_swap" / \( "$bytes_swap_limit" / 100 \)`
echo "peak virtual memory used: $peak_swap ($swap_percent%); exceeded limit $swap_failcount times" >&2
fi
# remove cgroup by sending a byte through the pipe
echo 1 > "$fifo"
rm "$fifo"
exit $exitcode
docker?