// ListContainers that are running
func (api *DockerApi) ListContainers(imageName string) ([]string, error) {
endpoint := api.configFile.DockerEndpoint
baseUrl := strings.Join(
[]string{
endpoint,
"containers",
"json",
},
"/",
)
params := strings.Join(
[]string{
"all=true",
},
"&",
)
url := baseUrl + "?" + params
Logger.Trace("ListContainers Api call:", url)
resp, _ := http.Get(url)
defer resp.Body.Close()
if body, err := ioutil.ReadAll(resp.Body); err != nil {
Logger.Error("Could not contact docker endpoint:", endpoint)
return nil, err
} else {
switch resp.StatusCode {
case 200:
var jsonResult []ApiContainer
if err := json.Unmarshal(body, &jsonResult); err != nil {
Logger.Error("Error while trying to marshall result, body:", jsonResult, " - Error:", err)
return nil, err
} else {
var ids []string
for i := range jsonResult {
if jsonResult[i].Image == imageName {
ids = append(ids, jsonResult[i].Id)
}
}
Logger.Debug("Containers found for", imageName, ids)
return ids, nil
}
case 404:
Logger.Warn("Bad param supplied to API")
case 500:
Logger.Error("Error while trying to communicate to docker endpoint:", endpoint)
}
}
return nil, nil
}
func (api *DockerApi) StartContainer(id string) (*string, error) {
endpoint := api.configFile.DockerEndpoint
postBody := DockerHostConfig{}
url := strings.Join(
[]string{
endpoint,
"containers",
id,
"start",
},
"/",
)
Logger.Trace("StartContainer() - Api call to:", url)
var jsonResult string
bytesReader, _ := postBody.Bytes()
resp, _ := http.Post(url, "text/json", bytes.NewReader(bytesReader))
defer resp.Body.Close()
if _, err := ioutil.ReadAll(resp.Body); err != nil {
Logger.Error("Could not contact docker endpoint:", endpoint)
return nil, err
} else {
switch resp.StatusCode {
case 204:
Logger.Info("Started container:", id)
return &jsonResult, nil
case 404:
Logger.Warn("No such container")
case 500:
Logger.Error("Error while trying to communicate to docker endpoint:", endpoint)
}
msg := "Unexpected response code: " + string(resp.StatusCode)
Logger.Error(msg)
return nil, errors.New(msg)
}
}
func (api *DockerApi) StopContainer(containerId string) (string, error) {
endpoint := api.configFile.DockerEndpoint
url := strings.Join(
[]string{
endpoint,
"containers",
containerId,
"stop",
},
"/",
)
Logger.Trace("StopContainer() - Api call to:", url)
resp, _ := http.Post(url, "text/json", nil)
defer resp.Body.Close()
if _, err := ioutil.ReadAll(resp.Body); err != nil {
Logger.Error("Could not contact docker endpoint:", endpoint)
return "", err
} else {
switch resp.StatusCode {
case 204:
Logger.Info("Stopped container:", containerId)
return containerId, nil
case 404:
msg := "No such container"
Logger.Warn(msg)
return "", nil
case 500:
msg := "Error while trying to communicate to docker endpoint: " + endpoint
Logger.Error(msg)
return "", nil
}
msg := "Unexpected response code: " + string(resp.StatusCode)
Logger.Error(msg)
return "", errors.New(msg)
}
}
func (cmd *LaunchCommand) Execute(args []string) error {
Logger.Info("Launching Tests... in dir:", cmd.Options.Dir)
Logger.Debug("Force:", cmd.Options.Force)
var wg sync.WaitGroup // used for channels
// Check Config and Buildfiles
configFile, buildFile, err := cmd.Controls.CheckConfigs(cmd.App, cmd.Options)
if err != nil {
return err
}
dc := NewDockerApi(cmd.App.AppState.Meta, configFile, buildFile)
dc.ShowInfo()
if err := dc.createTestTemplates(*cmd.Options); err != nil {
return err
}
Logger.Trace("Created test-flight templates.")
// Register channel so we can watch for events as they happen
eventsChannel := make(ApiChannel)
go watchForEventsOn(eventsChannel)
dc.RegisterChannel(eventsChannel)
fqImageName := cmd.App.AppState.BuildFile.ImageName + ":" + buildFile.Tag
getImageId := func() (string, error) {
if image, err := dc.GetImageDetails(fqImageName); err != nil {
return "", err
} else { // response from endpoint (but could be 404)
if image == nil { // doesn't exist
if newImage, err := dc.CreateDockerImage(fqImageName, cmd.Options); err != nil {
return "", err
} else {
return newImage, nil
}
} else { // exists
if cmd.Options.Force { // recreate anyway
if newImage, err := dc.CreateDockerImage(fqImageName, cmd.Options); err != nil {
return "", err
} else {
return newImage, nil
}
} else { // warn user
Logger.Warn("Will be starting a container from an image which already exists.")
return image.Id, nil
}
}
return image.Id, nil
}
}
createAndStartContainerFrom := func(imageId string) error {
if container, err := dc.CreateContainer(imageId); err != nil {
return err
} else {
Logger.Trace("Docker Container to start:", container.Id)
if _, err := dc.StartContainer(container.Id); err != nil {
return err
} else {
wg.Add(1)
containerChannel := dc.Attach(container.Id)
go watchContainerOn(containerChannel, &wg)
wg.Wait()
return nil
}
}
}
if imageId, err := getImageId(); err != nil {
return err
} else {
msg := "Launching docker container: " + imageId
Logger.Console(msg)
return createAndStartContainerFrom(imageId)
}
return nil
}
func (api *DockerApi) CreateContainer(fqImageName string) (*ApiPostResponse, error) {
if _, err := api.DeleteContainer(fqImageName); err != nil {
msg := "Error occured while trying to delete a container. " +
" This attempt failed for the following reason:" + err.Error()
Logger.Error(msg, err)
return nil, err
}
endpoint := api.configFile.DockerEndpoint
postBody := ApiPostRequest{
Image: fqImageName,
OpenStdin: true,
AttachStdin: false,
AttachStdout: true,
AttachStderr: true,
Cmd: api.buildFile.LaunchCmd,
}
url := FilePath(endpoint, "containers", "create")
Logger.Trace("CreateContainer() - Api call to:", url)
jsonResult := ApiPostResponse{}
bytesReader, _ := postBody.Bytes()
resp, _ := http.Post(url, "application/json", bytes.NewReader(bytesReader))
defer resp.Body.Close()
if body, err := ioutil.ReadAll(resp.Body); err != nil {
Logger.Error("Could not contact docker endpoint:", endpoint)
return nil, err
} else {
msg := "Unexpected response code: " + string(resp.StatusCode)
switch resp.StatusCode {
case 201:
if err := json.Unmarshal(body, &jsonResult); err != nil {
Logger.Error(err)
return nil, err
}
Logger.Info("Created container:", fqImageName)
return &jsonResult, nil
case 404:
msg = "No such container"
Logger.Warn(msg)
case 406:
msg = "Impossible to attach (container not running)"
Logger.Warn(msg)
case 500:
// noticed that when docker endpoint fails, it fails with just
// status 500, no message back. Logs do show error though somewhat
// slim details. i.e No command specified where command is really CMD :-(
msg = "Server and/or API error while trying to communicate with docker " +
"endpoint: " + endpoint + ". Could be malformed Dockerfile (template). " +
"Check your remote docker endpoint logs."
Logger.Error(msg)
}
return nil, errors.New(msg)
}
}
// CreateDockerImage creates a docker image by first creating the Dockerfile
// in memory and then tars it, prior to sending it along to the docker
// endpoint.
// Note: once the image creation starts the only way to know if it succeeded
// is to query for it again.
func (api *DockerApi) CreateDockerImage(fqImageName string, options *CommandOptions) (string, error) {
Logger.Debug("Creating Docker image by attempting to build Dockerfile: " + fqImageName)
tmplName := "Dockerfile" // file ext of `.tmpl` is implicit, see below
var requiredDockerFile = RequiredFile{
Name: "Test-Flight Dockerfile", FileName: tmplName, FileType: "f",
}
modeDir := func() string {
if options.SingleFileMode {
return "filemode"
} else {
return "dirmode"
}
}()
dockerfileBuffer := bytes.NewBuffer(nil)
tarbuf := bytes.NewBuffer(nil)
// Dockerfile mem
dockerfile := bufio.NewWriter(dockerfileBuffer)
// Or create file
templateOutputDir := getTemplateDir(api.configFile)
Logger.Trace(templateOutputDir, requiredDockerFile.FileName)
fileToCreate := FilePath(templateOutputDir.FileName, requiredDockerFile.FileName)
Logger.Debug("Trying to build:", fileToCreate)
dockerfileOut, err := os.Create(fileToCreate)
if err != nil {
Logger.Error("Could not write Dockerfile", err)
return "", err
}
defer dockerfileOut.Close()
// The directory where the templates used to create inventory and playbook
templates := func() string {
// could have been simpler but I want to log path at this level
var templatePath string
if api.configFile.UseSystemDockerTemplates {
templatePath = FilePath(api.configFile.TestFlightAssets, "templates", "system")
} else {
templatePath = FilePath(api.configFile.TestFlightAssets, "templates", "user")
}
Logger.Debug("Using template dir:", templatePath)
return templatePath
}()
// This is used below in `ExecuteTemplate()`
templateInputDir := FilePath(templates, modeDir)
pattern := filepath.Join(templateInputDir, requiredDockerFile.FileName+"*.tmpl")
tmpl := template.Must(template.ParseGlob(pattern))
// In Mem
if err := tmpl.ExecuteTemplate(dockerfile, requiredDockerFile.FileName, *api.getTemplateVar()); err != nil {
Logger.Error("template execution: %s", err)
return "", err
}
// File
if err := tmpl.ExecuteTemplate(dockerfileOut, requiredDockerFile.FileName, *api.getTemplateVar()); err != nil {
Logger.Error("template execution: %s", err)
return "", err
}
// For in-mem flush buffer here
dockerfile.Flush()
// Logger.Trace("Dockerfile buffer len", dockerfileBuffer.Len())
Logger.Trace("Dockerfile:", dockerfileBuffer.String())
// Logger.Info("Created Dockerfile: " + fqImageName)
currTime := time.Now()
// Add Dockerfile to archive, break out
tr := tar.NewWriter(tarbuf)
tr.WriteHeader(&tar.Header{
Name: "Dockerfile",
Size: int64(dockerfileBuffer.Len()),
ModTime: currTime,
AccessTime: currTime,
ChangeTime: currTime,
})
tr.Write(dockerfileBuffer.Bytes())
// Add Context to archive
// tar test directory
TarDirectory(tr, api.meta.Dir, api.buildFile.Ignore)
tr.Close()
var wg sync.WaitGroup // used for channels
wg.Add(1)
Logger.Trace("Building image...")
buildChannel := make(ContainerChannel)
// go watchContainerOn(buildChannel, &wg)
api.BuildImage(tarbuf, fqImageName, &buildChannel, &wg)
// go CaptureUserCancel(&buildChannel)
select {
case value := <-buildChannel:
switch value {
case "ok":
failMsg := "Docker Image [" + fqImageName + "] failed to build."
// We got an ok but don't know if it is legit. Possible to get no error
// but image will be nil (successful api call but image doesn't exist)
if image, err := api.GetImageDetails(fqImageName); err != nil || image == nil {
return "", errors.New(failMsg)
} else {
Logger.Info("Successfully built Docker image: " + fqImageName)
return image.Id, nil
}
case "canceled":
msg := "User Canceled docker creation."
Logger.Warn(msg, "User must manually stop last running container.")
return fqImageName, errors.New(msg)
}
}
wg.Wait()
Logger.Info("Successfully built Docker image: " + fqImageName)
return fqImageName, nil
}
func (api *DockerApi) DeleteImage(name string) (string, error) {
type ContainerStatus map[string]string
status := func(statusMap ContainerStatus) string {
possibleStatus := []string{"Untagged", "Deleted"}
for _, v := range possibleStatus {
containerId := statusMap[v]
if containerId != "" {
return containerId
}
}
Logger.Error("Api out of sync, could not map status, using UNKNOWN")
return "UNKNOWN"
}
endpoint := api.configFile.DockerEndpoint
delete := func(imageId string) ([]string, error) {
var deletedContainers []string
baseUrl := strings.Join(
[]string{
endpoint,
"images",
imageId,
},
"/",
)
params := strings.Join(
[]string{
"force=true",
"noprune=false",
},
"&",
)
url := baseUrl + "?" + params
Logger.Trace("DeleteImage() Api call:", url)
req, _ := http.NewRequest("DELETE", url, nil)
resp, _ := http.DefaultClient.Do(req)
defer resp.Body.Close()
if body, err := ioutil.ReadAll(resp.Body); err != nil {
Logger.Error("Could not contact docker endpoint:", endpoint)
} else {
switch resp.StatusCode {
case 200:
var jsonResult []ContainerStatus
if err := json.Unmarshal(body, &jsonResult); err != nil {
Logger.Error(err)
} else {
for _, v := range jsonResult {
deletedContainers = append(deletedContainers, status(v))
}
return deletedContainers, nil
}
case 409:
msg := "Cannot delete image while in use by a container. Delete the container first."
Logger.Warn(msg)
return deletedContainers, nil
case 404:
msg := "Image not found, cannot delete."
Logger.Warn(msg)
return deletedContainers, nil
case 500:
msg := "Error while trying to communicate to docker endpoint:"
Logger.Error(msg)
return nil, errors.New(msg)
}
msg := "API Out of sync, contact developers. Response code: " + strconv.Itoa(resp.StatusCode)
Logger.Error(msg)
return nil, errors.New(msg)
}
return deletedContainers, nil
}
// Need funcs.map(_.apply) where funcs is type [](func, errorString)
if image, err := api.GetImageDetails(name); err != nil {
Logger.Error("Could not get image details:", err)
return "", nil
} else if image != nil && err == nil {
if _, err := delete(image.Id); err != nil {
Logger.Error("Could not delete image: ", name, ", Id:", image.Id, ", Error was:", err)
return "", err
}
return name, nil
}
return "", nil
}
// Returns container name deleted, empty string if none, and an
// error (if any)
func (api *DockerApi) DeleteContainer(name string) ([]DeletedContainer, error) {
var deletedContainers []DeletedContainer
var returnError error
endpoint := api.configFile.DockerEndpoint
delete := func(id string) (*string, error) {
baseUrl := strings.Join(
[]string{
endpoint,
"containers",
id,
},
"/",
)
params := strings.Join(
[]string{
"v=true",
"force=true",
},
"&",
)
url := baseUrl + "?" + params
Logger.Trace("DeleteContainer() Api call:", url)
req, _ := http.NewRequest("DELETE", url, nil)
resp, _ := http.DefaultClient.Do(req)
defer resp.Body.Close()
if _, err := ioutil.ReadAll(resp.Body); err != nil {
Logger.Error("Could not contact docker endpoint:", endpoint)
return nil, err
} else {
switch resp.StatusCode {
case 204:
Logger.Info("Container Deleted:", name, ", with ID:", id)
return &name, nil
case 400:
msg := "Bad Api param supplied while trying to delete a container, notify developers."
Logger.Error(msg)
return nil, errors.New(msg)
case 404:
Logger.Warn("Container not found, nothing to delete.")
return nil, nil
case 406:
msg := "Container:" + name + " - (" + id + "), is running, cannot delete."
Logger.Warn(msg)
return nil, errors.New(msg)
case 500:
msg := "Error while trying to communicate to docker endpoint:" + endpoint
// Logger.Error(msg)
return nil, errors.New(msg)
}
statusCode := strconv.Itoa(resp.StatusCode)
msg := "API out of sync, contact developers! Status Code:" + statusCode
return nil, errors.New(msg)
}
}
if images, err := api.ListContainers(name); err != nil {
Logger.Error("Could not get image details:", err)
return nil, err
} else if images != nil {
Logger.Info("Found", len(images), "to delete...")
for _, container := range images {
Logger.Debug("Trying to delete", container)
if deleted, err := delete(container); err != nil {
returnError = err
msg := "Could not delete container: " + err.Error()
Logger.Error(msg)
} else if *deleted != "" {
deletedContainers = append(deletedContainers, DeletedContainer{*deleted, container})
}
}
return deletedContainers, returnError
} else {
Logger.Debug("No containers found for", name)
return deletedContainers, returnError
}
}
