grcon

grcon

grcon is a lightweight resource virtualization tool for linux processes. grcon is one-binary.

It is an implementation of rcon with golang.

build

make

usage

./grcon -h
Usage of ./grcon:
  -command string
        exec command
  -cpu int
        cpu limit(%) (default 30)
  -group string
        cgroups path (default "grcon")
  -memory int
        memory limit(bytes) (default 536870912)
  -pids string
        pids(comma separate)
  -user string
        exec username

cpu example

no limit

• command

yes >> /dev/null

• cpu usage

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
 2591 kunit     20   0 98.6m  616  524 R 99.9  0.1   1:42.42 yes

limitting cpu 10%

• command

sudo ./grcon --user kunit --command "yes >> /dev/null" --cpu 10

• cpu usage limitted 10% by grcon

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
 2689 kunit     20   0 98.6m  616  524 R 10.0  0.1   0:00.66 yes

limitting already running process to cpu 30%

• command

yes >> /dev/null &
yes >> /dev/null &
sudo ./grcon --pids "`pgrep yes`"

• cpu usage

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
 2650 vagrant   20   0 98.6m  612  524 R 15.0  0.1   0:14.49 yes
 2651 vagrant   20   0 98.6m  616  524 R 15.0  0.1   0:13.55 yes

References

• https://github.com/matsumotory/rcon
• https://github.com/containerd/cgroups