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infrakit: Add LogicalID -> IP -> UUID mapping

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If the LogicalID passed in is a IP address, turn this into
a UUID and pass it to HyperKit. This will cause  VPNKit to
assign the IP address the VM.

Note: This currently requires a custom version of VPNKit

Signed-off-by: Rolf Neugebauer <rolf.neugebauer@docker.com>
This commit is contained in:
Rolf Neugebauer 2017-04-06 23:16:32 +01:00
parent 569a5a4ba8
commit 971db3c0c3
1 changed files with 14 additions and 0 deletions
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14
src/cmd/infrakit-instance-hyperkit/instance.go
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@ -4,6 +4,7 @@ import (
"errors"
"fmt"
"io/ioutil"
"net"
"os"
"path"
@ -70,11 +71,23 @@ func (p hyperkitPlugin) Provision(spec instance.Spec) (*instance.ID, error) {
id := instance.ID(path.Base(instanceDir))
log.Infof("[%s] New instance", id)
// The LogicalID may be a IP address. If so, translate it into a
// magic UUID which cause VPNKit to assign a fixed IP address
logicalID := string(id)
uuidStr := ""
if spec.LogicalID != nil {
logicalID = string(*spec.LogicalID)
if ip := net.ParseIP(logicalID); len(ip) > 0 {
uuid := make([]byte, 16)
uuid[12] = ip.To4()[0]
uuid[13] = ip.To4()[1]
uuid[14] = ip.To4()[2]
uuid[15] = ip.To4()[3]
uuidStr = fmt.Sprintf("%x-%x-%x-%x-%x", uuid[0:4], uuid[4:6], uuid[6:8], uuid[8:10], uuid[10:])
}
}
log.Infof("[%s] LogicalID: %s", id, logicalID)
log.Debugf("[%s] UUID: %s", id, uuidStr)
// Start a HyperKit instance
h, err := hyperkit.New(p.HyperKit, instanceDir, p.VPNKitSock, "")
@ -86,6 +99,7 @@ func (p hyperkitPlugin) Provision(spec instance.Spec) (*instance.ID, error) {
h.CPUs = int(properties["CPUs"].(float64))
h.Memory = int(properties["Memory"].(float64))
h.DiskSize = int(properties["Disk"].(float64))
h.UUID = uuidStr
h.UserData = spec.Init
h.Console = hyperkit.ConsoleFile
log.Infof("[%s] Booting: %s/%s", id, h.Kernel, h.Initrd)