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allocator.go
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/
allocator.go
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package main
import (
"context"
"encoding/json"
"flag"
"io/ioutil"
"log"
"os"
"net/http"
"github.com/libp2p/go-libp2p-core/pnet"
"github.com/multiformats/go-multiaddr"
"github.com/PhysarumSM/common/p2pnode"
"github.com/PhysarumSM/common/util"
"github.com/PhysarumSM/service-manager/conf"
"github.com/PhysarumSM/service-manager/lca"
"github.com/prometheus/client_golang/prometheus/promhttp"
)
const defaultKeyFile = "~/.privKeyAlloc"
func init() {
// Set up logging defaults
log.SetFlags(log.Ldate | log.Lmicroseconds | log.Lshortfile)
}
func main () {
var err error
// Parse options
configPath := flag.String("configfile", "../conf/conf.json", "path to config file to use")
var keyFlags util.KeyFlags
var bootstraps *[]multiaddr.Multiaddr
var psk *pnet.PSK
if keyFlags, err = util.AddKeyFlags(defaultKeyFile); err != nil {
log.Fatalln(err)
}
if bootstraps, err = util.AddBootstrapFlags(); err != nil {
log.Fatalln(err)
}
if psk, err = util.AddPSKFlag(); err != nil {
log.Fatalln(err)
}
flag.Parse()
priv, err := util.CreateOrLoadKey(keyFlags)
if err != nil {
log.Fatalln(err)
}
// Start Prometheus endpoint for stats collection
http.Handle("/metrics", promhttp.Handler())
go http.ListenAndServe(":9101", nil)
ctx := context.Background()
// Read in config file
config := conf.Config{}
configFile, err := os.Open(*configPath)
if err != nil {
log.Fatalln(err)
}
defer configFile.Close()
configByte, err := ioutil.ReadAll(configFile)
if err != nil {
log.Fatalln(err)
}
err = json.Unmarshal(configByte, &config)
if err != nil {
log.Fatalln(err)
}
// If CLI didn't specify any bootstraps, fallback to configuration file.
// If configuration file doesn't contain bootstraps, fallback to
// checking environment variables.
if len(*bootstraps) == 0 {
if len(config.Bootstraps) == 0 {
envBootstraps, err := util.GetEnvBootstraps()
if err != nil {
log.Fatalln(err)
}
if len(envBootstraps) == 0 {
log.Fatalf("ERROR: Must specify at least one bootstrap node " +
"through a command line flag, the configuration file, or " +
"setting the %s environment variable.", util.ENV_KEY_BOOTSTRAPS)
}
*bootstraps = envBootstraps
} else {
*bootstraps, err = util.StringsToMultiaddrs(config.Bootstraps)
if err != nil {
log.Fatalln(err)
}
}
}
// If CLI didn't specify a PSK, check the environment variables
// Also retrieve the original PSK passphrase to pass to NewLCAAllocator
var hPsk pnet.PSK
var sPsk string
if *psk == nil {
hPsk, err = util.GetEnvPSK()
if err != nil {
log.Fatalln(err)
}
sPsk = util.GetEnvPSKString()
} else {
hPsk = *psk
sPsk = util.GetFlagPSKString()
}
// Set node configuration
nodeConfig := p2pnode.NewConfig()
nodeConfig.PrivKey = priv
nodeConfig.BootstrapPeers = *bootstraps
nodeConfig.PSK = hPsk
// Spawn LCA Allocator
log.Println("Spawning LCA Allocator")
_, err = lca.NewLCAAllocator(ctx, nodeConfig, sPsk)
if err != nil {
log.Fatalln(err)
}
// Wait for connection
log.Println("Waiting for requests...")
select {}
}