slc

Super Lightweight Container

• This provide super lightweight container, only filesystem isolation.
  • No isolation of network, user, IPC, UTS and process namespaces with host
  • Executable Ping (with setuid / capability) on rootless container
  • No daemon

Usage

As a library

	c, err := container.NewClient("./state")
	if err != nil {
		return err
	}

	if err := c.Run("alpine", []string{"/bin/bash"}); err != nil {
		return err
	}

As a command

sudo slc pull busybox
slc run busybox ping 8.8.8.8
sudo slc rm busybox
sudo slc clear

Build

git clone git@github.com:h-otter/slc.git
make build

Benchmark (TBD)

• Container overhead
  • Execution time
  • Memory
  • CPU

Execution time / CPU

% time ./slc run debian echo test
test
./slc echo test  0.00s user 0.01s system 110% cpu 0.010 total

% time docker run debian echo test
test
docker run debian echo test  0.04s user 0.03s system 8% cpu 0.777 total

% time docker start -a 9e184a0bb079
test
docker start -a 9e184a0bb079  0.04s user 0.05s system 11% cpu 0.854 total

Memory / CPU

• SLC used memory about 6 MB

h-otter  10283  0.0  0.0 1083776 6292 pts/5    SLl+ 03:03   0:00  \_ ./slc run centos:7 ping 8.8.8.8
h-otter  10289  0.0  0.0  28272  2000 pts/5    S+   03:03   0:00      \_ ping 8.8.8.8