containerd/api/v1/server.go

266 lines
6.7 KiB
Go
Raw Normal View History

2015-11-05 23:29:53 +00:00
package v1
import (
"encoding/json"
"net/http"
2015-11-10 21:44:35 +00:00
"strconv"
"syscall"
2015-11-05 23:29:53 +00:00
2015-11-10 19:38:26 +00:00
"github.com/Sirupsen/logrus"
"github.com/docker/containerd"
2015-11-05 23:29:53 +00:00
"github.com/gorilla/mux"
"github.com/opencontainers/specs"
2015-11-05 23:29:53 +00:00
)
func NewServer(supervisor *containerd.Supervisor) http.Handler {
r := mux.NewRouter()
s := &server{
supervisor: supervisor,
r: r,
}
// TODO: add container stats
// TODO: add container checkpoint
// TODO: add container restore
// TODO: set prctl child subreaper
2015-11-10 21:44:35 +00:00
r.HandleFunc("/containers/{id:.*}/process/{pid:.*}", s.signalPid).Methods("POST")
r.HandleFunc("/containers/{id:.*}/process", s.addProcess).Methods("PUT")
2015-11-06 00:40:57 +00:00
r.HandleFunc("/containers/{id:.*}", s.createContainer).Methods("POST")
r.HandleFunc("/containers/{id:.*}", s.updateContainer).Methods("PATCH")
r.HandleFunc("/event", s.event).Methods("POST")
r.HandleFunc("/events", s.events).Methods("GET")
2015-11-10 21:44:35 +00:00
r.HandleFunc("/containers", s.containers).Methods("GET")
2015-11-05 23:29:53 +00:00
return s
}
type server struct {
r *mux.Router
supervisor *containerd.Supervisor
}
// TODO: implement correct shutdown
2015-11-05 23:49:13 +00:00
func (s *server) ServeHTTP(w http.ResponseWriter, r *http.Request) {
s.r.ServeHTTP(w, r)
2015-11-05 23:29:53 +00:00
}
func (s *server) updateContainer(w http.ResponseWriter, r *http.Request) {
id := mux.Vars(r)["id"]
var state ContainerState
if err := json.NewDecoder(r.Body).Decode(&state); err != nil {
http.Error(w, err.Error(), http.StatusBadRequest)
return
}
e := containerd.NewEvent(containerd.UpdateContainerEventType)
e.ID = id
e.State = &containerd.State{
Status: containerd.Status(string(state.Status)),
}
s.supervisor.SendEvent(e)
if err := <-e.Err; err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
}
func (s *server) events(w http.ResponseWriter, r *http.Request) {
events, err := s.supervisor.Events()
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
enc := json.NewEncoder(w)
for evt := range events {
var v interface{}
switch evt.Type {
case containerd.ExitEventType:
v = createExitEvent(evt)
}
if err := enc.Encode(v); err != nil {
// TODO: handled closed conn
logrus.WithField("error", err).Error("encode event")
}
}
}
func createExitEvent(e *containerd.Event) *Event {
return &Event{
Type: "exit",
ID: e.ID,
Status: e.Status,
}
}
func (s *server) event(w http.ResponseWriter, r *http.Request) {
var e containerd.Event
if err := json.NewDecoder(r.Body).Decode(&e); err != nil {
http.Error(w, err.Error(), http.StatusBadRequest)
return
}
e.Err = make(chan error, 1)
s.supervisor.SendEvent(&e)
if err := <-e.Err; err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
if e.Containers != nil && len(e.Containers) > 0 {
if err := writeContainers(w, &e); err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
}
}
func (s *server) addProcess(w http.ResponseWriter, r *http.Request) {
id := mux.Vars(r)["id"]
var process specs.Process
if err := json.NewDecoder(r.Body).Decode(&process); err != nil {
http.Error(w, err.Error(), http.StatusBadRequest)
return
}
e := containerd.NewEvent(containerd.AddProcessEventType)
e.ID = id
e.Process = &process
s.supervisor.SendEvent(e)
if err := <-e.Err; err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
p := Process{
Pid: e.Pid,
Terminal: process.Terminal,
Args: process.Args,
Env: process.Env,
Cwd: process.Cwd,
}
p.User.UID = process.User.UID
p.User.GID = process.User.GID
p.User.AdditionalGids = process.User.AdditionalGids
if err := json.NewEncoder(w).Encode(p); err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
}
2015-11-10 21:44:35 +00:00
func (s *server) signalPid(w http.ResponseWriter, r *http.Request) {
var (
vars = mux.Vars(r)
id = vars["id"]
spid = vars["pid"]
)
pid, err := strconv.Atoi(spid)
if err != nil {
http.Error(w, err.Error(), http.StatusBadRequest)
return
}
var signal Signal
if err := json.NewDecoder(r.Body).Decode(&signal); err != nil {
http.Error(w, err.Error(), http.StatusBadRequest)
return
}
2015-11-10 22:24:34 +00:00
e := containerd.NewEvent(containerd.SignalEventType)
e.ID = id
e.Pid = pid
e.Signal = syscall.Signal(signal.Signal)
2015-11-10 21:44:35 +00:00
s.supervisor.SendEvent(e)
if err := <-e.Err; err != nil {
status := http.StatusInternalServerError
if err == containerd.ErrContainerNotFound {
status = http.StatusNotFound
}
http.Error(w, err.Error(), status)
return
}
}
2015-11-05 23:29:53 +00:00
func (s *server) containers(w http.ResponseWriter, r *http.Request) {
2015-11-10 22:24:34 +00:00
e := containerd.NewEvent(containerd.GetContainerEventType)
2015-11-10 19:38:26 +00:00
s.supervisor.SendEvent(e)
if err := <-e.Err; err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
if err := writeContainers(w, e); err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
}
func writeContainers(w http.ResponseWriter, e *containerd.Event) error {
var state State
state.Containers = []Container{}
2015-11-10 19:38:26 +00:00
for _, c := range e.Containers {
processes, err := c.Processes()
if err != nil {
logrus.WithFields(logrus.Fields{
"error": err,
"container": c.ID(),
}).Error("get processes for container")
}
var pids []Process
2015-11-10 21:44:35 +00:00
for _, p := range processes {
2015-11-13 22:52:25 +00:00
if proc := createProcess(p); proc != nil {
pids = append(pids, *proc)
}
2015-11-10 21:44:35 +00:00
}
2015-11-10 19:38:26 +00:00
state.Containers = append(state.Containers, Container{
ID: c.ID(),
BundlePath: c.Path(),
2015-11-10 21:44:35 +00:00
Processes: pids,
State: &ContainerState{
Status: Status(c.State().Status),
},
2015-11-10 19:38:26 +00:00
})
}
return json.NewEncoder(w).Encode(&state)
}
2015-11-13 22:52:25 +00:00
func createProcess(in containerd.Process) *Process {
pid, err := in.Pid()
if err != nil {
logrus.WithField("error", err).Error("get process pid")
2015-11-13 22:52:25 +00:00
return nil
}
process := in.Spec()
2015-11-13 22:52:25 +00:00
p := &Process{
Pid: pid,
Terminal: process.Terminal,
Args: process.Args,
Env: process.Env,
Cwd: process.Cwd,
2015-11-10 19:38:26 +00:00
}
p.User.UID = process.User.UID
p.User.GID = process.User.GID
p.User.AdditionalGids = process.User.AdditionalGids
return p
2015-11-05 23:29:53 +00:00
}
func (s *server) createContainer(w http.ResponseWriter, r *http.Request) {
id := mux.Vars(r)["id"]
var c Container
if err := json.NewDecoder(r.Body).Decode(&c); err != nil {
http.Error(w, err.Error(), http.StatusBadRequest)
return
}
2015-11-10 21:44:35 +00:00
if c.BundlePath == "" {
http.Error(w, "empty bundle path", http.StatusBadRequest)
return
}
2015-11-10 22:24:34 +00:00
e := containerd.NewEvent(containerd.StartContainerEventType)
e.ID = id
e.BundlePath = c.BundlePath
2015-11-13 21:22:42 +00:00
e.Stdio = &containerd.Stdio{
Stderr: c.Stderr,
Stdout: c.Stdout,
}
2015-11-05 23:29:53 +00:00
s.supervisor.SendEvent(e)
if err := <-e.Err; err != nil {
code := http.StatusInternalServerError
if err == containerd.ErrBundleNotFound {
code = http.StatusNotFound
}
http.Error(w, err.Error(), code)
return
}
w.WriteHeader(http.StatusCreated)
}