mirror of
https://github.com/openfaas/faasd.git
synced 2025-06-10 00:46:47 +00:00
Add resolv.conf and networking hooks
Signed-off-by: Alex Ellis (OpenFaaS Ltd) <alexellis2@gmail.com>
This commit is contained in:
parent
5c45242b3d
commit
a0e7f88125
17
cmd/up.go
17
cmd/up.go
@ -20,14 +20,27 @@ func runUp(_ *cobra.Command, _ []string) error {
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pkg.Service{
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pkg.Service{
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Name: "faas-containerd",
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Name: "faas-containerd",
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Env: []string{},
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Env: []string{},
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Image: "docker.io/functions/figlet:latest",
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Image: "docker.io/alexellis2/faas-containerd:0.2.0",
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Mounts: []pkg.Mount{
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Mounts: []pkg.Mount{
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pkg.Mount{
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pkg.Mount{
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Src: "/run/containerd/containerd.sock",
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Src: "/run/containerd/containerd.sock",
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Dest: "/run/containerd/containerd.sock",
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Dest: "/run/containerd/containerd.sock",
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},
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},
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},
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},
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}}
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},
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pkg.Service{
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Name: "gateway",
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Env: []string{},
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Image: "docker.io/openfaas/gateway:0.18.7",
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Mounts: []pkg.Mount{},
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},
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pkg.Service{
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Name: "prometheus",
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Env: []string{},
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Image: "docker.io/prom/prometheus:v2.14.0",
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Mounts: []pkg.Mount{},
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},
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}
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start := time.Now()
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start := time.Now()
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supervisor, err := pkg.NewSupervisor("/run/containerd/containerd.sock")
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supervisor, err := pkg.NewSupervisor("/run/containerd/containerd.sock")
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@ -3,9 +3,20 @@ package pkg
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import (
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import (
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"context"
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"context"
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"fmt"
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"fmt"
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"log"
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"os"
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"os/exec"
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"path"
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"syscall"
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"time"
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"github.com/containerd/containerd"
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"github.com/containerd/containerd"
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"github.com/containerd/containerd/api/services/tasks/v1"
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"github.com/containerd/containerd/cio"
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"github.com/containerd/containerd/containers"
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"github.com/containerd/containerd/namespaces"
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"github.com/containerd/containerd/namespaces"
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"github.com/containerd/containerd/oci"
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"github.com/opencontainers/runtime-spec/specs-go"
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)
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)
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type Supervisor struct {
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type Supervisor struct {
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@ -28,30 +39,163 @@ func (s *Supervisor) Close() {
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}
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}
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func (s *Supervisor) Start(svcs []Service) error {
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func (s *Supervisor) Start(svcs []Service) error {
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ctx := namespaces.WithNamespace(context.Background(), "default")
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images := map[string]containerd.Image{}
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for _, svc := range svcs {
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for _, svc := range svcs {
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fmt.Printf("Preparing: %s", svc.Name)
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fmt.Printf("Preparing: %s", svc.Name)
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fmt.Printf("Pulling: %s\n", svc.Image)
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fmt.Printf("Pulling: %s\n", svc.Image)
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bytesOut, err := pullImage(s.client, svc.Image)
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img, err := pullImage(ctx, s.client, svc.Image)
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if err != nil {
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if err != nil {
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return err
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return err
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}
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}
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fmt.Printf("Pull done for: %s, %d bytes\n", svc.Image, bytesOut)
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images[svc.Name] = img
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size, _ := img.Size(ctx)
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fmt.Printf("Pull done for: %s, %d bytes\n", svc.Image, size)
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}
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for _, svc := range svcs {
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fmt.Printf("Starting: %s\n", svc.Name)
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image := images[svc.Name]
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container, containerErr := s.client.ContainerService().Get(ctx, svc.Name)
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if containerErr == nil {
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taskReq := &tasks.GetRequest{
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ContainerID: container.ID,
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}
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task, err := s.client.TaskService().Get(ctx, taskReq)
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if task != nil && task.Process != nil {
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zero := time.Time{}
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fmt.Println(task.Process.ExitedAt, "=", zero)
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if task.Process.ExitedAt == zero {
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log.Println("need to kill", svc.Name)
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killReq := tasks.KillRequest{
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ContainerID: container.ID,
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Signal: uint32(syscall.SIGTERM),
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}
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em, err := s.client.TaskService().Kill(ctx, &killReq)
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if err != nil {
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return fmt.Errorf("error killing task %s, %s, %s", container.ID, svc.Name, err)
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}
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time.Sleep(1 * time.Second)
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log.Println("em", em)
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}
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deleteReq := tasks.DeleteTaskRequest{
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ContainerID: container.ID,
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}
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_, err = s.client.TaskService().Delete(ctx, &deleteReq)
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if err != nil {
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return fmt.Errorf("error deleting task %s, %s, %s", container.ID, svc.Name, err)
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}
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}
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err = s.client.ContainerService().Delete(ctx, svc.Name)
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fmt.Println(err)
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err = s.client.SnapshotService("").Remove(ctx, svc.Name+"-snapshot")
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fmt.Println(err)
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}
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mounts := []specs.Mount{}
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if len(svc.Mounts) > 0 {
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for _, mnt := range svc.Mounts {
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mounts = append(mounts, specs.Mount{
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Source: mnt.Src,
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Destination: mnt.Dest,
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Type: "bind",
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Options: []string{"rbind", "rw"},
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})
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}
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}
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wd, _ := os.Getwd()
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resolv := path.Join(wd, "resolv.conf")
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log.Println("Using ", resolv)
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mounts = append(mounts, specs.Mount{
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Destination: "/etc/resolv.conf",
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Type: "bind",
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Source: resolv,
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Options: []string{"rbind", "ro"},
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})
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hook := func(_ context.Context, _ oci.Client, _ *containers.Container, s *specs.Spec) error {
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if s.Hooks == nil {
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s.Hooks = &specs.Hooks{}
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}
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netnsPath, err := exec.LookPath("netns")
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if err != nil {
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return err
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}
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s.Hooks.Prestart = []specs.Hook{
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{
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Path: netnsPath,
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Args: []string{
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"netns",
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},
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Env: os.Environ(),
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},
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}
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return nil
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}
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newContainer, containerCreateErr := s.client.NewContainer(
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ctx,
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svc.Name,
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containerd.WithImage(image),
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containerd.WithNewSnapshot(svc.Name+"-snapshot", image),
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containerd.WithNewSpec(oci.WithImageConfig(image), oci.WithCapabilities([]string{"CAP_NET_RAW"}), oci.WithMounts(mounts), hook),
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)
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if containerCreateErr != nil {
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log.Println(containerCreateErr)
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return containerCreateErr
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}
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fmt.Println("created", newContainer.ID())
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task, err := newContainer.NewTask(ctx, cio.NewCreator(cio.WithStdio))
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if err != nil {
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log.Println(err)
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return err
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}
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exitStatusC, err := task.Wait(ctx)
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if err != nil {
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log.Println(err)
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return err
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}
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log.Println("Exited: ", exitStatusC)
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// call start on the task to execute the redis server
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if err := task.Start(ctx); err != nil {
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log.Println("Task err: ", err)
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return err
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}
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}
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}
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return nil
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return nil
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}
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}
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func pullImage(client *containerd.Client, image string) (int64, error) {
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func pullImage(ctx context.Context, client *containerd.Client, image string) (containerd.Image, error) {
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ctx := namespaces.WithNamespace(context.Background(), "default")
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pulled, err := client.Pull(ctx, image, containerd.WithPullUnpack)
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pulled, err := client.Pull(ctx, image, containerd.WithPullUnpack)
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if err != nil {
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if err != nil {
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return 0, err
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return nil, err
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}
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}
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bytesOut, _ := pulled.Size(ctx)
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return bytesOut, nil
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return pulled, nil
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}
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}
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type Service struct {
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type Service struct {
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2
resolv.conf
Normal file
2
resolv.conf
Normal file
@ -0,0 +1,2 @@
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nameserver 8.8.8.8
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