README.md

@@ -1,7 +1,5 @@
 # Octopus
 
-![](logo.png)
-
 ## Octopus Overview
 
 `Octopus`는 DNS와 systemd-nspawn, [ipvlan](https://www.kernel.org/doc/Documentation/networking/ipvlan.txt) 및 [overlayfs](https://www.kernel.org/doc/Documentation/filesystems/overlayfs.txt)를 이용한 한 머신내의 가볍고 설정가능한 컨테이너를 구동하는 것이 목표입니다.

octopus-inside/main.go

@@ -22,15 +22,16 @@ func main(){
 
    renameInterface(link,"eth0")
 
-   if macAddr,err:= net.ParseMAC(getEnvWithDefault("MAC_ADDR","")) ;err == nil{
+   switch linkInterfaceType {
+   case "macvlan":
+     macAddr,_ := net.ParseMAC(getEnv("IF_ADDR"))
      renameMacAddress(link,macAddr)
-   }
-   if ipAddr,err:= netlink.ParseAddr(getEnvWithDefault("IP_ADDR","")) ; err ==nil{
+   case "ipvlan":
+     ipAddr,_ := netlink.ParseAddr(getEnv("IP_ADDR"))
+     gatewayAddr := net.ParseIP(getEnv("GATEWAY_ADDR"))
      netlink.AddrAdd(link,ipAddr)
-   }
      netlink.LinkSetUp(link)
-   if gatewayAddrStr:= getEnvWithDefault("GATEWAY_ADDR","");len(gatewayAddrStr)>0{
-       addRoute(net.ParseIP(gatewayAddrStr),link)
+     addRoute(gatewayAddr,link)
   }
 }
 

octopus-outside/main.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+
 	"bytes"
 	"errors"
 	"fmt"
@@ -13,7 +14,7 @@ import (
 
 	"io/ioutil"
 
-	"gopkg.in/alecthomas/kingpin.v2"
+	kingpin "gopkg.in/alecthomas/kingpin.v2"
 	"gopkg.in/yaml.v2"
 
 	"strconv"
@@ -22,40 +23,15 @@ import (
 	"github.com/vishvananda/netlink"
 )
 
-type cmdList []string
-
-func (i *cmdList) Set(value string) error {
-	*i = append(*i, value)
-	return nil
-}
-
-func (i *cmdList) String() string {
-	return ""
-}
-
-func (i *cmdList) IsCumulative() bool {
-	return true
-}
-
-func CmdList(s kingpin.Settings) (target *[]string) {
-	target = new([]string)
-	s.SetValue((*cmdList)(target))
-	return
-}
-
 var (
 	app               = kingpin.New("octopus-outside", "nspawn Bootstrapper.").Author("Sangbum Kim<sangbumkim@amuz.es>")
 	verbosePtr        = app.Flag("verbose", "Enable verbose mode.").Short('v').Bool()
 	clearPtr          = app.Flag("clear", "clear os environment.").Short('p').Bool()
-	ifBindTypePtr     = app.Flag("if-bind-type", "choose virtual ethernet bind type(ipvlan,macvlan).").Default("ipvlan").Short('b').Enum("ipvlan", "macvlan")
-	isFindSubnetPtr   = app.Flag("subnet-scan", "find subnet mode. if not specify, use default network scan mode.").Short('t').Default("false").Bool()
-	macAddrPtr        = app.Flag("mac-address", "Specify MAC address of macvlan mode. if not specify, use random.").Short('a').String()
 	nspawnPathPtr     = app.Flag("nspawn-path", "systemd-nspawn location.").Short('s').String()
 	containerHomePtr  = app.Flag("container-home", "container residence path").Default("/container").Short('d').String()
 	configFileNamePtr = app.Flag("config-file", "config file name").Default("settings.yml").HintOptions("FILENAME").Short('c').String()
 	nodeNamePtr       = app.Arg("nodeName", "nodename to spawn.").Required().String()
 	bindIfNamePtr     = app.Arg("bindInterface", "interface name to bind.").Required().String()
-	cmdListArgsPtr    = CmdList(app.Arg("cmd", "execute command rather than boot process"))
 )
 
 type mountPoint struct {
@@ -127,97 +103,6 @@ func getIP(host string) (ip net.IP, err error) {
 	return addrs[0], nil
 }
 
-func getCidr(network net.IPNet) (cidr uint64, err error) {
-	netSlice := strings.Split(network.String(), "/")
-	if len(netSlice) < 2 {
-		err = errors.New("cannot get netmask")
-		return
-	}
-	cidr, err = strconv.ParseUint(netSlice[len(netSlice)-1], 10, 64)
-	return
-}
-func getSubnetIPInfo(ip net.IP, verbose bool) (gw net.IP, cidr uint64, linkname string, err error) {
-	// netlink.RouteList
-	var links []netlink.Link
-	links, err = netlink.LinkList()
-	if err != nil {
-		return
-	}
-
-	if verbose {
-		fmt.Println("scan system network interfaces:")
-	}
-
-	for _, link := range links {
-		attrs := link.Attrs()
-
-		if verbose {
-			fmt.Printf(" interface %s : ", attrs.Name)
-		}
-		if (attrs.Flags & net.FlagUp) == 0 {
-			if verbose {
-				fmt.Printf(" not up -- abandon!\n")
-			}
-			continue
-		} else {
-			if verbose {
-				fmt.Printf(" up!\n")
-			}
-		}
-		if verbose {
-			fmt.Println("   getting routing tables ")
-		}
-		var routes []netlink.Route
-		routes, err = netlink.RouteList(link, netlink.FAMILY_V4)
-		if err != nil {
-			continue
-		}
-		var (
-			matchedRoute *netlink.Route
-		)
-		for _, route := range routes {
-
-			if verbose {
-				fmt.Printf("     routing table %s\n", route.String())
-			}
-
-			if route.Dst == nil {
-				if verbose {
-					fmt.Printf("      - default gateway : no one!\n")
-				}
-			} else if route.Dst.Contains(ip) {
-				if verbose {
-					fmt.Printf("      - matched routing role : %s\n", route.String())
-				}
-				matchedRoute = &route
-				break
-			} else if verbose {
-				fmt.Printf("      - no subnet gateway\n")
-			}
-		}
-
-		if matchedRoute == nil {
-			if verbose {
-				fmt.Println("    - cannot getting routing rule")
-				fmt.Println("  abandon this interface ")
-			}
-			continue
-		}
-		if cidrData, err := getCidr(*matchedRoute.Dst); err == nil {
-			cidr = cidrData
-			if verbose {
-				fmt.Printf("     interface have a subnet routing rule. gateway: %s", matchedRoute)
-				fmt.Println(" ok! matched ")
-			}
-			gw, cidr, linkname = matchedRoute.Src, cidrData, attrs.Name
-			break
-		} else if verbose {
-			fmt.Printf("    - cannot getting netmask : %s", err)
-			fmt.Println("  abandon this interface ")
-		}
-	}
-	return
-}
 func getOutboundIPInfo(verbose bool) (gw net.IP, cidr uint64, linkname string, err error) {
 	// netlink.RouteList
 	var links []netlink.Link
@@ -300,12 +185,14 @@ func getOutboundIPInfo(verbose bool) (gw net.IP, cidr uint64, linkname string, e
 				if verbose {
 					fmt.Printf("      - default network\n")
 				}
-				if cidrData, err := getCidr(*network.IPNet); err == nil {
+				netSlice := strings.Split(network.IPNet.String(), "/")
+				if len(netSlice) < 2 {
+					continue
+				}
+				if cidrData, err := strconv.ParseUint(netSlice[len(netSlice)-1], 10, 64); err == nil {
 					matchedCidr = cidrData
 					cidrOk = true
 					break
-				} else if verbose {
-					fmt.Printf("    - cannot getting netmask : %s", err)
 				}
 			} else if verbose {
 				fmt.Printf("      - no default network\n")
@@ -402,14 +289,10 @@ func main() {
 	_, err := app.Parse(os.Args[1:])
 	var (
 		verbose        = *verbosePtr
-		ifBindType     = *ifBindTypePtr
-		macAddr        = strings.TrimSpace(*macAddrPtr)
 		clear          = *clearPtr
 		nodeName       = *nodeNamePtr
-		isFindSubnet   = *isFindSubnetPtr
 		bindIfName     = *bindIfNamePtr
 		configFileName = *configFileNamePtr
-		cmdListArgs    = *cmdListArgsPtr
 		nspawnPath     string
 		progress       = -1
 	)
@@ -478,19 +361,9 @@ func main() {
 	}
 
 	progress++
-	var (
-		gw       net.IP
-		cidr     uint64
-		linkname string
-	)
-	if isFindSubnet {
-		gw, cidr, linkname, err = getSubnetIPInfo(nodeAddr, verbose)
-	} else {
-		gw, cidr, linkname, err = getOutboundIPInfo(verbose)
-
-	}
+	gw, cidr, linkname, err := getOutboundIPInfo(verbose)
 	if err != nil {
-		panic(errs.Wrap(err, "error in network info"))
+		panic(errs.Wrap(err, "error in getOutboundIPInfo"))
 	}
 
 	if verbose {
@@ -498,31 +371,17 @@ func main() {
 		fmt.Printf("  - bind interface{%s} : valid\n", bindIfName)
 		fmt.Printf("  - default routing info : ip %s/%d link %s\n", gw.String(), cidr, linkname)
 		fmt.Printf("  - node{%s} IP address : %s\n", nodeName, nodeAddr.String())
-		fmt.Printf("  - bind interface type : %s\n", ifBindType)
 	}
 	option := []string{
 		"--quiet",
+		"--boot",
 		"--link-journal=try-host",
 		"--notify-ready=true"}
-	switch ifBindType {
-	case "macvlan":
-		option = append(option, fmt.Sprintf("--network-macvlan=%s", bindIfName))
-		if len(macAddr) > 0 {
-			option = append(option, fmt.Sprintf("--setenv=MAC_ADDR=%s", macAddr))
-		}
-	case "ipvlan":
 	option = append(option, fmt.Sprintf("--network-ipvlan=%s", bindIfName))
-	default:
-		panic(errors.New("unknown bind type"))
-	}
-
-	option = append(option, fmt.Sprintf("--setenv=IF_TYPE=%s", ifBindType))
 	option = append(option, fmt.Sprintf("--setenv=IP_ADDR=%s/%d", nodeAddr.String(), cidr))
 	option = append(option, fmt.Sprintf("--setenv=GATEWAY_ADDR=%s", gw.String()))
 	option = append(option, fmt.Sprintf("--machine=%s", nodeName))
 	option = append(option, fmt.Sprintf("--directory=%s", filepath.Join(nodePath, "merge")))
-//        option = append(option, "--keep-unit", "--register=yes", "--settings=override", "--private-users=1354956800:65536", "--private-users-chown")
-        option = append(option, "--keep-unit", "--register=yes", "--settings=override")
 
 	for _, mountPoint := range config.MoundPoint {
 		if mountOption, err := mountPoint.Option(nodePath); err != nil {
@@ -531,19 +390,6 @@ func main() {
 			option = append(option, mountOption)
 		}
 	}
-	if len(cmdListArgs) == 0 {
-		if verbose {
-			fmt.Println("startup type: using systemd")
-		}
-		option = append(option, "--boot")
-	} else {
-		if verbose {
-			fmt.Println("startup type: using command")
-		}
-		for _, cmdArg := range cmdListArgs {
-			option = append(option, fmt.Sprintf(" %s", cmdArg))
-		}
-	}
 	var env []string
 	if clear {
 		env = []string{}
@@ -569,3 +415,4 @@ func main() {
 		panic(errs.Wrap(err, "error in systemd-nspawn execution"))
 	}
 }
+

services/octopus-outside.service

@@ -15,8 +15,7 @@ After=dnsmasq.service
 After=pdnsd.service
 
 [Service]
-ExecStartPre=/usr/bin/sleep 3s
-ExecStart=/container/octopus-outside %I igb1 -v -b ipvlan -t
+ExecStart=/container/octopus-outside %I igb0 -v
 KillMode=mixed
 Type=notify
 RestartForceExitStatus=133