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runc

NOTE: Since this is a big change from the current gwoo/runc project I have left the import paths pointing to gwoo/runc

NOTE: Some vendor trickery used because libcontainer includes a vendor/src directory, but still references the default import paths for vendored dependencies. For example, github.com/coreos/go-systemd is import path, but libcontainer/vendor/src/github.com/coreos/go-systemd is the desired dependency. The libcontainer project manages this by including all the files on the command line in the Makefile. This project solve the problem by updating the GOPATH and only including dependencies not part of the libcontainer project in the Godeps manifest.

runc is a CLI tool for spawning and running containers according to the OCF specification.

Building:

git clone https://github.com/gwoo/runc
make install

Using:

To run a container that you received just execute runc run with the JSON format at the argument or have a container.json file in the current working directory.

runc
/ $ ps
PID   USER     COMMAND
1     daemon   sh
5     daemon   sh
/ $

OCF Container JSON Format;

{
    "version": "0.1",
    "os": "linux",
    "arch": "amd64",
    "processes": [
        {
            "tty": true,
            "user": "daemon",
            "args": [
                "sh"
            ],
            "env": [
                "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
                "TERM=xterm"
            ],
            "cwd": ""
        }
    ],
    "root": {
        "path": "rootfs",
        "readonly": true
    },
    "cpus": 1.1,
    "memory": 1024,
    "hostname": "shell",
    "namespaces": [
        {
            "type": "process"
        },
        {
            "type": "network"
        },
        {
            "type": "mount"
        },
        {
            "type": "ipc"
        },
        {
            "type": "uts"
        }
    ],
    "capabilities": [
        "AUDIT_WRITE",
        "KILL",
        "NET_BIND_SERVICE"
    ],
    "devices": [
        "null",
        "random",
        "full",
        "tty",
        "zero",
        "urandom"
    ],
    "mounts": [
        {
            "type": "proc",
            "source": "proc",
            "destination": "/proc",
            "options": ""
        },
        {
            "type": "tmpfs",
            "source": "tmpfs",
            "destination": "/dev",
            "options": "nosuid,strictatime,mode=755,size=65536k"
        },
        {
            "type": "devpts",
            "source": "devpts",
            "destination": "/dev/pts",
            "options": "nosuid,noexec,newinstance,ptmxmode=0666,mode=0620,gid=5"
        },
        {
            "type": "tmpfs",
            "source": "shm",
            "destination": "/dev/shm",
            "options": "nosuid,noexec,nodev,mode=1777,size=65536k"
        },
        {
            "type": "mqueue",
            "source": "mqueue",
            "destination": "/dev/mqueue",
            "options": "nosuid,noexec,nodev"
        },
        {
            "type": "sysfs",
            "source": "sysfs",
            "destination": "/sys",
            "options": "nosuid,noexec,nodev"
        }
    ]
}

Examples:

Using runc with systemd

[Unit]
Description=Minecraft Build Server
Documentation=http://minecraft.net
After=network.target

[Service]
CPUQuota=200%
MemoryLimit=1536M
ExecStart=/usr/local/bin/runc
Restart=on-failure
WorkingDirectory=/containers/minecraftbuild

[Install]
WantedBy=multi-user.target

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runc container cli tools

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