func main() {
flag.Parse()
maxProcs := runtime.NumCPU()
prevMaxProcs := runtime.GOMAXPROCS(maxProcs)
log.Println("set GOMAXPROCS to", maxProcs, "was", prevMaxProcs)
var backend backend.Backend
switch *backendName {
case "linux":
if *rootPath == "" {
log.Fatalln("must specify -root with linux backend")
}
if *depotPath == "" {
log.Fatalln("must specify -depot with linux backend")
}
if *rootFSPath == "" {
log.Fatalln("must specify -rootfs with linux backend")
}
uidPool := uid_pool.New(10000, 256)
_, ipNet, err := net.ParseCIDR("10.254.0.0/22")
if err != nil {
log.Fatalln("error parsing CIDR:", err)
}
networkPool := network_pool.New(ipNet)
// TODO: base on ephemeral port range
portPool := port_pool.New(61000, 6501)
var runner command_runner.CommandRunner
runner = command_runner.New(*debug)
quotaManager, err := quota_manager.New(*depotPath, *rootPath, runner)
if err != nil {
log.Fatalln("error creating quota manager:", err)
}
if *disableQuotas {
quotaManager.Disable()
}
pool := container_pool.New(
path.Join(*rootPath, "linux"),
*depotPath,
*rootFSPath,
uidPool,
networkPool,
portPool,
runner,
quotaManager,
)
backend = linux_backend.New(pool, *snapshotsPath)
case "fake":
backend = fake_backend.New()
}
log.Println("setting up backend")
err := backend.Setup()
if err != nil {
log.Fatalln("failed to set up backend:", err)
}
log.Println("starting server; listening with", *listenNetwork, "on", *listenAddr)
graceTime := time.Duration(*containerGraceTime) * time.Second
wardenServer := server.New(*listenNetwork, *listenAddr, graceTime, backend)
err = wardenServer.Start()
if err != nil {
log.Fatalln("failed to start:", err)
}
signals := make(chan os.Signal, 1)
go func() {
<-signals
log.Println("stopping...")
wardenServer.Stop()
os.Exit(0)
}()
signal.Notify(signals, syscall.SIGINT, syscall.SIGTERM, syscall.SIGHUP)
select {}
}
package uid_pool_test
import (
. "github.com/onsi/ginkgo"
. "github.com/onsi/gomega"
"github.com/pivotal-cf-experimental/garden/linux_backend/uid_pool"
)
var _ = Describe("Unix UID pool", func() {
Describe("acquiring", func() {
It("returns the next available UID from the pool", func() {
pool := uid_pool.New(10000, 5)
uid1, err := pool.Acquire()
Expect(err).ToNot(HaveOccurred())
uid2, err := pool.Acquire()
Expect(err).ToNot(HaveOccurred())
Expect(uid1).To(Equal(uint32(10000)))
Expect(uid2).To(Equal(uint32(10001)))
})
Context("when the pool is exhausted", func() {
It("returns an error", func() {
pool := uid_pool.New(10000, 5)
for i := 0; i < 5; i++ {
_, err := pool.Acquire()
Expect(err).ToNot(HaveOccurred())