func fileConfig() Config {
path := misc.NVL(os.Getenv("CONFIG_FILE_PATH"), "/etc/docker-webui/config.json")
file, err := os.Open(path)
if err != nil {
return Config{}
}
data, err := ioutil.ReadAll(file)
if err != nil {
log.Fatal("Unable to read config file", "err:", err)
return Config{}
}
if strings.TrimSpace(string(data)) == "" {
return Config{}
}
config := Config{}
err = json.Unmarshal(data, &config)
if err != nil {
log.Fatal("Error reading config json data. [message] ", err)
}
return config
}
func init() {
cfg := config.NewConfig()
http.Handle("/container/top/", util.Chain(func(w http.ResponseWriter, r *http.Request) {
id := r.URL.Path[len("/container/top/"):]
client, _ := util.RequestGetParam(r, "client")
params := struct{ ID, Name, Client string }{id, _label(id, client, cfg.LabelOverrideNames), client}
util.RenderHTML(w, []string{"containers/top.tmpl"}, params, nil)
}))
http.Handle("/container/statlog/", util.Chain(func(w http.ResponseWriter, r *http.Request) {
id := r.URL.Path[len("/container/statlog/"):]
client, _ := util.RequestGetParam(r, "client")
params := struct {
ID, Name, Client string
ViewOnly bool
}{id, _label(id, client, cfg.LabelOverrideNames), client, cfg.ViewOnly}
util.RenderHTML(w, []string{"containers/statlog.tmpl"}, params, nil)
}))
http.Handle("/container/changes/", util.Chain(func(w http.ResponseWriter, r *http.Request) {
id := r.URL.Path[len("/container/changes/"):]
client, _ := util.RequestGetParam(r, "client")
params := struct{ ID, Name, Client string }{id, _label(id, client, cfg.LabelOverrideNames), client}
util.RenderHTML(w, []string{"containers/changes.tmpl"}, params, nil)
}))
http.Handle("/logs", util.Chain(func(w http.ResponseWriter, r *http.Request) {
params := struct{ LabelFilters string }{strings.Join(cfg.LabelFilters, ",")}
util.RenderHTML(w, []string{"containers/logs.tmpl"}, params, nil)
}))
http.Handle("/statistics", util.Chain(func(w http.ResponseWriter, r *http.Request) {
clients, err := models.LoadDockerClients()
if err != nil {
renderErrorJSON(w, err)
return
}
params := struct {
LabelFilters string
Clients int
}{strings.Join(cfg.LabelFilters, ","), len(clients)}
util.RenderHTML(w, []string{"containers/statistics.tmpl"}, params, nil)
}))
/**
* Containers' API
* @param limit int
* @param status int (0: all, 1: created, 2: restarting, 3: running, 4: paused, 5&6: exited)
* @param q string search words
* @return []model.DockerContainer
*/
http.Handle("/api/containers", util.Chain(func(w http.ResponseWriter, r *http.Request) {
type container struct {
Client *models.DockerClient `json:"client"`
Containers []models.DockerContainer `json:"containers"`
}
dockers, ok := clients(w)
if !ok {
return
}
options := models.ListContainerOption(util.RequestGetParamI(r, "status", 0))
options.Limit = util.RequestGetParamI(r, "limit", 100)
d := make(chan *container, len(dockers))
result := []*container{}
for _, docker := range dockers {
go func(docker *engine.Client) {
containers, err := docker.ListContainers(options)
if err != nil {
renderErrorJSON(w, err)
return
}
var words []string
if q, found := util.RequestGetParam(r, "q"); found {
words = util.SplittedUpperStrings(q)
}
d <- &container{
Client: docker.Conf,
Containers: models.SearchContainers(containers, words),
}
}(docker)
}
for i := 0; i < len(dockers); i++ {
result = append(result, <-d)
}
close(d)
util.RenderJSON(w, result, nil)
}))
http.Handle("/api/statistics", util.Chain(func(w http.ResponseWriter, r *http.Request) {
var dockers []*engine.Client
if c, found := util.RequestGetParam(r, "client"); found {
if docker, ok := client(w, c); ok {
dockers = []*engine.Client{docker}
}
} else {
var ok bool
dockers, ok = clients(w)
if !ok {
return
}
}
type statistics struct {
Client *models.DockerClient `json:"client"`
Stats map[string]map[string][]*api.Stats `json:"stats"`
}
stats := []statistics{}
d := make(chan statistics, len(dockers))
for _, docker := range dockers {
go func(docker *engine.Client) {
candidate, err := docker.ListContainers(models.ListContainerOption(3))
if err != nil {
renderErrorJSON(w, err)
return
}
containers := models.SearchContainers(candidate, []string{})
c := make(chan models.DockerStats, len(containers))
stats := map[string]map[string][]*api.Stats{}
count := util.RequestGetParamI(r, "count", 1)
for _, container := range containers {
go func(container models.DockerContainer) {
stat, _ := docker.Stats(container.ID, count)
name := strings.Join(container.Names, ",")
if !misc.ZeroOrNil(cfg.LabelOverrideNames) {
if label, found := container.Labels[cfg.LabelOverrideNames]; found {
name = "*" + label
}
}
c <- models.DockerStats{
ID: container.ID,
Name: name,
Stats: stat,
}
}(container)
}
for i := 0; i < len(containers); i++ {
ds := <-c
inner := map[string][]*api.Stats{}
inner[ds.Name] = ds.Stats
stats[ds.ID] = inner
}
close(c)
d <- statistics{
Client: docker.Conf,
Stats: stats,
}
}(docker)
}
for i := 0; i < len(dockers); i++ {
stats = append(stats, <-d)
}
close(d)
util.RenderJSON(w, stats, nil)
}))
http.Handle("/api/logs", util.Chain(func(w http.ResponseWriter, r *http.Request) {
count := util.RequestGetParamI(r, "count", 100)
var dockers []*engine.Client
if c, found := util.RequestGetParam(r, "client"); found {
if docker, ok := client(w, c); ok {
dockers = []*engine.Client{docker}
}
} else {
var ok bool
dockers, ok = clients(w)
if !ok {
return
}
}
type stdlogs struct {
ID string `json:"id"`
Stdout []string `json:"stdout"`
Stderr []string `json:"stderr"`
}
type clientlogs struct {
Client *models.DockerClient `json:"client"`
Logs []stdlogs `json:"logs"`
}
logs := []clientlogs{}
d := make(chan clientlogs, len(dockers))
for _, docker := range dockers {
go func(docker *engine.Client) {
candidate, err := docker.ListContainers(models.ListContainerOption(3))
if err != nil {
renderErrorJSON(w, err)
return
}
containers := models.SearchContainers(candidate, []string{})
c := make(chan stdlogs, len(containers))
inner := []stdlogs{}
for _, container := range containers {
go func(container models.DockerContainer) {
stdout, stderr, err := docker.Logs(container.ID, count, 1*time.Second)
if err != nil {
renderErrorJSON(w, err)
return
}
c <- stdlogs{container.ID, stdout, stderr}
}(container)
}
for i := 0; i < len(containers); i++ {
inner = append(inner, <-c)
}
close(c)
d <- clientlogs{
Client: docker.Conf,
Logs: inner,
}
}(docker)
}
for i := 0; i < len(dockers); i++ {
logs = append(logs, <-d)
}
close(d)
util.RenderJSON(w, logs, nil)
}))
/**
* A container's API
*/
// inspect
http.Handle("/api/container/inspect/", util.Chain(func(w http.ResponseWriter, r *http.Request) {
if docker, ok := client(w, util.RequestGetParamS(r, "client", "")); ok {
id := r.URL.Path[len("/api/container/inspect/"):]
meta := docker.InspectContainer(id)
util.RenderJSON(w, meta.Container, meta.Error)
}
}))
// top
http.Handle("/api/container/top/", util.Chain(func(w http.ResponseWriter, r *http.Request) {
if docker, ok := client(w, util.RequestGetParamS(r, "client", "")); ok {
id := r.URL.Path[len("/api/container/top/"):]
args := util.RequestGetParamS(r, "args", "aux")
util.RenderJSON(w, docker.Top(id, args), nil)
}
}))
// stats
http.Handle("/api/container/stats/", util.Chain(func(w http.ResponseWriter, r *http.Request) {
if docker, ok := client(w, util.RequestGetParamS(r, "client", "")); ok {
id := r.URL.Path[len("/api/container/stats/"):]
result, err := docker.Stats(id, util.RequestGetParamI(r, "count", 1))
if err != nil {
renderErrorJSON(w, err)
return
}
util.RenderJSON(w, result, nil)
}
}))
// logs
http.Handle("/api/container/logs/", util.Chain(func(w http.ResponseWriter, r *http.Request) {
if docker, ok := client(w, util.RequestGetParamS(r, "client", "")); ok {
id := r.URL.Path[len("/api/container/logs/"):]
count := util.RequestGetParamI(r, "count", 100)
stdout, stderr, err := docker.Logs(id, count, 1*time.Second)
if err != nil {
renderErrorJSON(w, err)
return
}
util.RenderJSON(w, struct {
Stdout []string `json:"stdout"`
Stderr []string `json:"stderr"`
}{
stdout,
stderr,
}, nil)
}
}))
// diff
http.Handle("/api/container/changes/", util.Chain(func(w http.ResponseWriter, r *http.Request) {
if docker, ok := client(w, util.RequestGetParamS(r, "client", "")); ok {
id := r.URL.Path[len("/api/container/changes/"):]
util.RenderJSON(w, docker.Changes(id), nil)
}
}))
// restart
http.Handle("/api/container/restart/", util.Chain(func(w http.ResponseWriter, r *http.Request) {
if r.Method != "POST" {
http.NotFound(w, r)
return
}
if docker, ok := client(w, util.RequestPostParamS(r, "client", "")); ok {
meta := docker.Restart(r.URL.Path[len("/api/container/restart/"):], 5)
if meta.Error != nil {
renderErrorJSON(w, meta.Error)
return
}
util.RenderJSON(w, meta.Container, nil)
}
}))
// start
http.Handle("/api/container/start/", util.Chain(func(w http.ResponseWriter, r *http.Request) {
if r.Method != "POST" {
http.NotFound(w, r)
return
}
if docker, ok := client(w, util.RequestPostParamS(r, "client", "")); ok {
meta := docker.Start(r.URL.Path[len("/api/container/start/"):])
if meta.Error != nil {
renderErrorJSON(w, meta.Error)
return
}
util.RenderJSON(w, meta.Container, nil)
}
}))
// stop
http.Handle("/api/container/stop/", util.Chain(func(w http.ResponseWriter, r *http.Request) {
if r.Method != "POST" {
http.NotFound(w, r)
return
}
if docker, ok := client(w, util.RequestPostParamS(r, "client", "")); ok {
meta := docker.Stop(r.URL.Path[len("/api/container/stop/"):])
if meta.Error != nil {
renderErrorJSON(w, meta.Error)
return
}
util.RenderJSON(w, meta.Container, nil)
}
}))
// kill
http.Handle("/api/container/kill/", util.Chain(func(w http.ResponseWriter, r *http.Request) {
if r.Method != "POST" {
http.NotFound(w, r)
return
}
if docker, ok := client(w, util.RequestPostParamS(r, "client", "")); ok {
meta := docker.Kill(r.URL.Path[len("/api/container/kill/"):], 5)
if meta.Error != nil {
renderErrorJSON(w, meta.Error)
return
}
util.RenderJSON(w, meta.Container, nil)
}
}))
// rm
http.Handle("/api/container/rm/", util.Chain(func(w http.ResponseWriter, r *http.Request) {
if r.Method != "POST" {
http.NotFound(w, r)
return
}
if docker, ok := client(w, util.RequestPostParamS(r, "client", "")); ok {
err := docker.Rm(r.URL.Path[len("/api/container/rm/"):])
if err != nil {
renderErrorJSON(w, err)
return
}
util.RenderJSON(w, "removed successfully.", nil)
}
}))
// rename
http.Handle("/api/container/rename/", util.Chain(func(w http.ResponseWriter, r *http.Request) {
if r.Method != "POST" {
http.NotFound(w, r)
return
}
if docker, ok := client(w, util.RequestPostParamS(r, "client", "")); ok {
if name, found := util.RequestPostParam(r, "name"); found {
err := docker.Rename(r.URL.Path[len("/api/container/rename/"):], name)
message := "renamed successfully."
if err != nil {
message = err.Error()
}
util.RenderJSON(w, message, nil)
return
}
}
}))
// commit
http.Handle("/api/container/commit/", util.Chain(func(w http.ResponseWriter, r *http.Request) {
if r.Method != "POST" {
http.NotFound(w, r)
return
}
if docker, ok := client(w, util.RequestPostParamS(r, "client", "")); ok {
repository, _ := util.RequestPostParam(r, "repo")
tag, _ := util.RequestPostParam(r, "tag")
massage, _ := util.RequestPostParam(r, "msg")
author, _ := util.RequestPostParam(r, "author")
meta := docker.Commit(
r.URL.Path[len("/api/container/commit/"):],
repository, tag, massage, author)
if meta.Error != nil {
renderErrorJSON(w, meta.Error)
return
}
util.RenderJSON(w, meta.Image, nil)
}
}))
// @see https://docs.docker.com/docker-hub/builds/#webhooks
type Repository struct {
Name string `json:"name"`
Owner string `json:"owner"`
RepoName string `json:"repo_name"`
}
type Webhook struct {
CallbackURL string `json:"callback_url"`
Repository Repository `json:"repository"`
}
/**
* Update by DockerHub
* which pull an image again & restart the container to update its service
*/
http.Handle("/api/container/update", util.Chain(func(w http.ResponseWriter, r *http.Request) {
if r.Method != "POST" {
http.NotFound(w, r)
return
}
// parse parameters
webhook := Webhook{}
err := json.NewDecoder(r.Body).Decode(&webhook)
if err != nil {
logs.Warn.Print(err)
http.NotFound(w, r)
return
}
repository, tag := api.ParseRepositoryTag(webhook.Repository.RepoName)
tag = misc.NVL(tag, "latest")
// TODO trying all docker clients!!
docker, ok := client(w, util.RequestPostParamS(r, "client", ""))
if !ok {
return
}
// pull the latest image
var imageRepoTag string
for _, image := range docker.ListImages() {
for _, repotag := range image.RepoTags {
if repotag == repository+":"+tag {
imageRepoTag = repotag
}
}
}
if misc.ZeroOrNil(imageRepoTag) {
http.NotFound(w, r)
return
}
if meta := docker.Pull(imageRepoTag); meta.Error != nil {
util.RenderJSON(w, meta.Error.Error(), nil)
return
}
// list running containers
containers, err := docker.ListContainers(models.ListContainerOption(3))
if err != nil {
util.RenderJSON(w, err.Error(), nil)
return
}
// restart its container
restarted := []string{}
for _, container := range containers {
if container.Image == imageRepoTag {
meta := docker.InspectContainer(container.ID)
if meta.Error != nil {
continue
}
// remove the existing container
if meta := docker.Stop(container.ID); meta.Error != nil {
renderErrorJSON(w, meta.Error)
return
}
if err := docker.Rm(container.ID); err != nil {
renderErrorJSON(w, err)
return
}
// create a new container using the dead container configurations.
// because if we just restart the container, its image would not
// reference the new one.
c := meta.Container
if meta := docker.Create(c.Name, c.Config, c.HostConfig); meta.Error != nil {
renderErrorJSON(w, meta.Error)
return
}
if meta := docker.Start(c.Name[1:]); meta.Error != nil {
renderErrorJSON(w, meta.Error)
return
}
restarted = append(restarted, c.Name[1:])
}
}
util.RenderJSON(w, restarted, nil)
}))
}
func (c *Client) pull(image string) ImageMetadata {
reader, writer := io.Pipe()
defer writer.Close()
repository, tag := api.ParseRepositoryTag(image)
tag = misc.NVL(tag, "latest")
opts := api.PullImageOptions{
Repository: repository + ":" + tag,
OutputStream: writer,
}
// check output goroutine
began := make(chan bool, 1)
once := sync.Once{}
go func() {
reader := bufio.NewReader(reader)
var line string
var err error
for err == nil {
line, err = reader.ReadString('\n')
if err != nil {
break
}
once.Do(func() {
began <- true
})
if strings.Contains(line, "already being pulled by another client. Waiting.") {
logs.Error.Printf("Image 'pull' status marked as already being pulled. image: %v, status: %v", opts.Repository, line)
}
}
if err != nil && err != io.EOF {
logs.Warn.Printf("Error reading pull image status. image: %v, err: %v", opts.Repository, err)
}
}()
// pull the image
timeout := time.After(cfg.DockerPullBeginTimeout)
finished := make(chan error, 1)
go func() {
finished <- c.PullImage(opts, api.AuthConfiguration{})
logs.Debug.Printf("Pull completed for image: %v", opts.Repository)
}()
// wait for the pulling to begin
select {
case <-began:
break
case err := <-finished:
if err != nil {
return ImageMetadata{
Image: &api.Image{ID: ""},
Error: CannotXContainerError{"Pull", err.Error()},
}
}
return c.InspectImage(opts.Repository)
case <-timeout:
return ImageMetadata{
Image: &api.Image{ID: ""},
Error: &DockerTimeoutError{cfg.DockerPullBeginTimeout, "pullBegin"},
}
}
// wait for the completion
err := <-finished
if err != nil {
return ImageMetadata{
Image: &api.Image{ID: ""},
Error: CannotXContainerError{"Pull", err.Error()},
}
}
return c.InspectImage(opts.Repository)
}