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dockerinit: set IP address

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Set the IP address in dockerinit instead of lxc utils, to prepare for
using libvirt-lxc.
This commit is contained in:
Josh Poimboeuf
2013-12-12 19:57:11 -06:00
parent f7c7f7978c
commit ecc51cd465
3 changed files with 40 additions and 11 deletions
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sysinit/sysinit.go
+35 -8
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@@ -20,6 +20,7 @@ import (
type DockerInitArgs struct {
user string
gateway string
ip string
workDir string
privileged bool
env []string
@@ -36,17 +37,41 @@ func setupHostname(args *DockerInitArgs) error {
// Setup networking
func setupNetworking(args *DockerInitArgs) error {
if args.gateway == "" {
return nil
}
if args.ip != "" {
// eth0
iface, err := net.InterfaceByName("eth0")
if err != nil {
return fmt.Errorf("Unable to set up networking: %v", err)
}
ip, ipNet, err := net.ParseCIDR(args.ip)
if err != nil {
return fmt.Errorf("Unable to set up networking: %v", err)
}
if err := netlink.NetworkLinkAddIp(iface, ip, ipNet); err != nil {
return fmt.Errorf("Unable to set up networking: %v", err)
}
if err := netlink.NetworkLinkUp(iface); err != nil {
return fmt.Errorf("Unable to set up networking: %v", err)
}
ip := net.ParseIP(args.gateway)
if ip == nil {
return fmt.Errorf("Unable to set up networking, %s is not a valid IP", args.gateway)
// loopback
iface, err = net.InterfaceByName("lo")
if err != nil {
return fmt.Errorf("Unable to set up networking: %v", err)
}
if err := netlink.NetworkLinkUp(iface); err != nil {
return fmt.Errorf("Unable to set up networking: %v", err)
}
}
if args.gateway != "" {
gw := net.ParseIP(args.gateway)
if gw == nil {
return fmt.Errorf("Unable to set up networking, %s is not a valid gateway IP", args.gateway)
}
if err := netlink.AddDefaultGw(ip); err != nil {
return fmt.Errorf("Unable to set up networking: %v", err)
if err := netlink.AddDefaultGw(gw); err != nil {
return fmt.Errorf("Unable to set up networking: %v", err)
}
}
return nil
@@ -199,6 +224,7 @@ func SysInit() {
// Get cmdline arguments
user := flag.String("u", "", "username or uid")
gateway := flag.String("g", "", "gateway address")
ip := flag.String("i", "", "ip address")
workDir := flag.String("w", "", "workdir")
privileged := flag.Bool("privileged", false, "privileged mode")
flag.Parse()
@@ -216,6 +242,7 @@ func SysInit() {
args := &DockerInitArgs{
user: *user,
gateway: *gateway,
ip: *ip,
workDir: *workDir,
privileged: *privileged,
env: env,