forked from cafebazaar/blacksmith
/
blacksmith.go
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/
blacksmith.go
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package main // import "github.com/cafebazaar/blacksmith"
import (
"flag"
"fmt"
"log"
"net"
"os"
"path"
"strings"
"time"
"github.com/cafebazaar/blacksmith/cloudconfig"
"github.com/cafebazaar/blacksmith/datasource"
"github.com/cafebazaar/blacksmith/dhcp"
"github.com/cafebazaar/blacksmith/logging"
"github.com/cafebazaar/blacksmith/pxe"
"github.com/cafebazaar/blacksmith/web"
etcd "github.com/coreos/etcd/client"
)
//go:generate esc -o pxe/pxelinux_autogen.go -prefix=pxe -pkg pxe -ignore=README.md pxe/pxelinux
//go:generate esc -o web/ui_autogen.go -prefix=web -ignore=bower_components -pkg web web/ui
var _ cloudconfig.DataSource = (*datasource.RuntimeConfiguration)(nil)
var _ cloudconfig.DataSource = (*datasource.Flags)(nil)
const (
workspacePathHelp = `Path to workspace which obey following structure
/images/{core-os-version}/coreos_production_pxe_image.cpio.gz
/images/{core-os-version}/coreos_production_pxe.vmlinuz
/config/cloudconfig/main.yaml
/config/ignition/main.yaml
/initial.yaml
`
)
var (
versionFlag = flag.Bool("version", false, "Print version info and exit")
debugFlag = flag.Bool("debug", false, "Log more things that aren't directly related to booting a recognized client")
listenIFFlag = flag.String("if", "0.0.0.0", "Interface name for DHCP and PXE to listen on")
workspacePathFlag = flag.String("workspace", "/workspace", workspacePathHelp)
etcdFlag = flag.String("etcd", "", "Etcd endpoints")
etcdDirFlag = flag.String("etcd-dir", "blacksmith", "The etcd directory prefix")
leaseStartFlag = flag.String("lease-start", "", "Begining of lease starting IP")
leaseRangeFlag = flag.Int("lease-range", 0, "Lease range")
leaseSubnetFlag = flag.String("lease-subnet", "", "Subnet of specified lease")
leaseRouterFlag = flag.String("router", "", "Default router that assigned to DHCP clients")
leaseDNSFlag = flag.String("dns", "", "Default DNS that assigned to DHCP clients")
version string
commit string
buildTime string
)
func init() {
// If version, commit, or build time are not set, make that clear.
if version == "" {
version = "unknown"
}
if commit == "" {
commit = "unknown"
}
if buildTime == "" {
buildTime = "unknown"
}
}
func interfaceIP(iface *net.Interface) (net.IP, error) {
addrs, err := iface.Addrs()
if err != nil {
return nil, err
}
fs := [](func(net.IP) bool){
net.IP.IsGlobalUnicast,
net.IP.IsLinkLocalUnicast,
net.IP.IsLoopback,
}
for _, f := range fs {
for _, a := range addrs {
ipaddr, ok := a.(*net.IPNet)
if !ok {
continue
}
ip := ipaddr.IP.To4()
if ip == nil {
continue
}
if f(ip) {
return ip, nil
}
}
}
return nil, fmt.Errorf("interface %s has no usable unicast addresses", iface.Name)
}
func main() {
var err error
flag.Parse()
fmt.Printf("Blacksmith (%s)\n", version)
fmt.Printf(" Commit: %s\n", commit)
fmt.Printf(" Build Time: %s\n", buildTime)
if *versionFlag {
os.Exit(0)
}
// etcd config
if etcdFlag == nil || etcdDirFlag == nil {
fmt.Fprint(os.Stderr, "please specify the etcd endpoints\n")
os.Exit(1)
}
// listen ip address for http, tftp
var listenIP = net.IP{0, 0, 0, 0}
// finding interface by interface name
var dhcpIF *net.Interface
if *listenIFFlag != "" {
dhcpIF, err = net.InterfaceByName(*listenIFFlag)
} else {
fmt.Fprint(os.Stderr, "please specify an interface\n")
os.Exit(1)
}
if err != nil {
log.Fatalln(err)
}
dhcpIP, err := interfaceIP(dhcpIF)
if err != nil {
log.Fatalln(err)
}
// used for replying in dhcp and pxe
var serverIP = net.IPv4zero
if serverIP.Equal(net.IPv4zero) {
serverIP = dhcpIP
}
var httpAddr = net.TCPAddr{IP: listenIP, Port: 70}
var tftpAddr = net.UDPAddr{IP: listenIP, Port: 69}
var webAddr = net.TCPAddr{IP: listenIP, Port: 8000}
var cloudConfigHTTPAddr = net.TCPAddr{IP: listenIP, Port: 8001}
var pxeAddr = net.UDPAddr{IP: dhcpIP, Port: 4011}
// dhcp setting
leaseStart := net.ParseIP(*leaseStartFlag)
leaseRange := *leaseRangeFlag
leaseSubnet := net.ParseIP(*leaseSubnetFlag)
leaseRouter := net.ParseIP(*leaseRouterFlag)
leaseDNS := net.ParseIP(*leaseDNSFlag)
leaseDuration := 1 * time.Hour
if leaseStart == nil {
fmt.Fprint(os.Stderr, "please specify the lease start ip\n")
os.Exit(1)
}
if leaseRange <= 1 {
fmt.Fprint(os.Stderr, "lease range should be greater that 1\n")
os.Exit(1)
}
if leaseSubnet == nil {
fmt.Fprint(os.Stderr, "please specify the lease subnet\n")
os.Exit(1)
}
if leaseRouter == nil {
fmt.Fprint(os.Stderr, "please specify the IP address of network router\n")
os.Exit(1)
}
if leaseDNS == nil {
fmt.Fprint(os.Stderr, "please specify an DNS server\n")
os.Exit(1)
}
fmt.Printf("Server IP: %s\n", serverIP.String())
fmt.Printf("Interface IP: %s\n", dhcpIP.String())
fmt.Printf("Interface Name: %s\n", dhcpIF.Name)
// datasources
etcdClient, err := etcd.New(etcd.Config{
Endpoints: strings.Split(*etcdFlag, ","),
HeaderTimeoutPerRequest: time.Second,
})
if err != nil {
fmt.Fprintf(os.Stderr, "couldn't create etcd connection: %s\n", err)
os.Exit(1)
}
kapi := etcd.NewKeysAPI(etcdClient)
runtimeConfig, err := datasource.NewRuntimeConfiguration(kapi, etcdClient, *etcdDirFlag, *workspacePathFlag)
if err != nil {
fmt.Fprintf(os.Stderr, "couldn't create runtime configuration: %s\n", err)
os.Exit(1)
}
flagsDataSource, err := datasource.NewFlags(kapi, path.Join(*etcdDirFlag, "flags"))
if err != nil {
fmt.Fprintf(os.Stderr, "couldn't create runtime configuration: %s\n", err)
os.Exit(1)
}
datasources := map[string]cloudconfig.DataSource{
"default": runtimeConfig,
"flags": flagsDataSource,
}
// serving cloudconfig
go func() {
log.Fatalln(cloudconfig.ServeCloudConfig(cloudConfigHTTPAddr, *workspacePathFlag, datasources))
}()
// serving http booter
go func() {
repo, err := cloudconfig.FromPath(datasources, path.Join(*workspacePathFlag, "config/bootparams"))
if err != nil {
log.Fatalln(err)
}
log.Fatalln(pxe.ServeHTTPBooter(httpAddr, runtimeConfig, repo))
}()
// serving tftp
go func() {
log.Fatalln(pxe.ServeTFTP(tftpAddr))
}()
// pxe protocol
go func() {
log.Fatalln(pxe.ServePXE(pxeAddr, serverIP, net.TCPAddr{IP: serverIP, Port: httpAddr.Port}))
}()
// serving dhcp
leasePool, err := dhcp.NewLeasePool(kapi, *etcdDirFlag, leaseStart, leaseRange, leaseDuration)
if err != nil {
log.Fatalln(err)
}
// serving web
go func() {
restServer := web.NewRest(leasePool, runtimeConfig)
log.Fatalln(web.ServeWeb(restServer, webAddr))
}()
go func() {
log.Fatalln(dhcp.ServeDHCP(&dhcp.DHCPSetting{
IFName: dhcpIF.Name,
LeaseDuration: leaseDuration,
ServerIP: serverIP,
RouterAddr: leaseRouter,
SubnetMask: leaseSubnet,
DNSAddr: leaseDNS,
}, leasePool))
}()
logging.RecordLogs(log.New(os.Stderr, "", log.LstdFlags), *debugFlag)
}