rcon 
rcon is a lightweight resource virtualization tool for linux processes. rcon is one-binary.
demo
build
build on vagrant
vagrant up
vagrant ssh
cd rcon/
rake
cp -p mruby/bin/rcon /path/to/bin-dir/.
build packages and release
Create release binary considering glibc versions using Docker.
Require: golang docker
I build and release rcon on macOS.
rake package
ls -l pkg/
GITHUB_TOKEN=`cat ~/.github_token` rake release
usage
./rcon --help
Usage: rcon [options] --user username --command "yes >> /dev/null"
--cpu VAL
default: 30 (%)
--memory VAL
default: 512000000 (Byte)
--read VAL
default: 10485760 (Byte/sec)
--write VAL
default: 10485760 (Byte/sec)
--group VAL
default: rcon
--dev VAL
default: 8:0
--pids VAL
default: nothing
--version
cpu example
no limit
- command
yes >> /dev/null
- cpu usage
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
27577 matsumot 20 0 98.5m 608 520 R 100.0 0.0 0:01.95 yes
limitting cpu 10%
- command
sudo ./rcon --user matsumotory --command "yes >> /dev/null" --cpu 10
- cpu usage limitted 10% by rcon
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
23941 matsumot 20 0 98.5m 604 520 R 9.6 0.0 0:00.63 yes
limitting already running process to cpu 30%
- command
yes >> /dev/null &
yes >> /dev/null &
sudo ./rcon --pids "`pgrep yes`"
- cpu usage
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
22531 vagrant 20 0 98.5m 612 524 R 15.6 0.0 0:16.16 yes
22532 vagrant 20 0 98.5m 612 524 R 14.3 0.0 0:15.47 yes
Notice: pids optsion don't delete groups after running process was finished
io example
no limit
- command
dd if=/dev/zero of=tempfile bs=1M count=1000 oflag=direct
- io usage
TID PRIO USER DISK READ DISK WRITE SWAPIN IO> COMMAND
27569 be/4 matsumot 0.00 B/s 22.09 M/s 0.00 % 95.93 % dd if=/dev/zero of=tempfile bs=1M count=1000 oflag=direct
limitting write io 1MByte/sec
- command
sudo ./rcon --user matsumotory --command "dd if=/dev/zero of=tempfile bs=1M count=1000 oflag=direct" --write 1024000
- io usage limitted 1MByte/sec by rcon
TID PRIO USER DISK READ DISK WRITE SWAPIN IO> COMMAND
24676 be/4 matsumot 0.00 B/s 995.77 K/s 0.00 % 99.99 % dd if=/dev/zero of=tempfile bs=1M count=1000 oflag=direct
- find io dev id (--dev)
$ ls -l /dev/xvda, awk '{print $5 $6}', sed 's/,/:/'
202:0
for --dev option. default 8:0.