harness-drone/vendor/github.com/samalba/dockerclient/dockerclient.go
2015-09-29 18:21:17 -07:00

714 lines
17 KiB
Go

package dockerclient
import (
"bytes"
"crypto/tls"
"encoding/json"
"errors"
"fmt"
"io"
"io/ioutil"
"net/http"
"net/url"
"strconv"
"strings"
"sync/atomic"
"time"
)
const (
APIVersion = "v1.15"
)
var (
ErrNotFound = errors.New("Not found")
defaultTimeout = 30 * time.Second
)
type DockerClient struct {
URL *url.URL
HTTPClient *http.Client
TLSConfig *tls.Config
monitorStats int32
eventStopChan chan (struct{})
}
type Error struct {
StatusCode int
Status string
msg string
}
func (e Error) Error() string {
return fmt.Sprintf("%s: %s", e.Status, e.msg)
}
func NewDockerClient(daemonUrl string, tlsConfig *tls.Config) (*DockerClient, error) {
return NewDockerClientTimeout(daemonUrl, tlsConfig, time.Duration(defaultTimeout))
}
func NewDockerClientTimeout(daemonUrl string, tlsConfig *tls.Config, timeout time.Duration) (*DockerClient, error) {
u, err := url.Parse(daemonUrl)
if err != nil {
return nil, err
}
if u.Scheme == "" || u.Scheme == "tcp" {
if tlsConfig == nil {
u.Scheme = "http"
} else {
u.Scheme = "https"
}
}
httpClient := newHTTPClient(u, tlsConfig, timeout)
return &DockerClient{u, httpClient, tlsConfig, 0, nil}, nil
}
func (client *DockerClient) doRequest(method string, path string, body []byte, headers map[string]string) ([]byte, error) {
b := bytes.NewBuffer(body)
reader, err := client.doStreamRequest(method, path, b, headers)
if err != nil {
return nil, err
}
defer reader.Close()
data, err := ioutil.ReadAll(reader)
if err != nil {
return nil, err
}
return data, nil
}
func (client *DockerClient) doStreamRequest(method string, path string, in io.Reader, headers map[string]string) (io.ReadCloser, error) {
if (method == "POST" || method == "PUT") && in == nil {
in = bytes.NewReader(nil)
}
req, err := http.NewRequest(method, client.URL.String()+path, in)
if err != nil {
return nil, err
}
req.Header.Add("Content-Type", "application/json")
if headers != nil {
for header, value := range headers {
req.Header.Add(header, value)
}
}
resp, err := client.HTTPClient.Do(req)
if err != nil {
if !strings.Contains(err.Error(), "connection refused") && client.TLSConfig == nil {
return nil, fmt.Errorf("%v. Are you trying to connect to a TLS-enabled daemon without TLS?", err)
}
return nil, err
}
if resp.StatusCode == 404 {
return nil, ErrNotFound
}
if resp.StatusCode >= 400 {
defer resp.Body.Close()
data, err := ioutil.ReadAll(resp.Body)
if err != nil {
return nil, err
}
return nil, Error{StatusCode: resp.StatusCode, Status: resp.Status, msg: string(data)}
}
return resp.Body, nil
}
func (client *DockerClient) Info() (*Info, error) {
uri := fmt.Sprintf("/%s/info", APIVersion)
data, err := client.doRequest("GET", uri, nil, nil)
if err != nil {
return nil, err
}
ret := &Info{}
err = json.Unmarshal(data, &ret)
if err != nil {
return nil, err
}
return ret, nil
}
func (client *DockerClient) ListContainers(all bool, size bool, filters string) ([]Container, error) {
argAll := 0
if all == true {
argAll = 1
}
showSize := 0
if size == true {
showSize = 1
}
uri := fmt.Sprintf("/%s/containers/json?all=%d&size=%d", APIVersion, argAll, showSize)
if filters != "" {
uri += "&filters=" + filters
}
data, err := client.doRequest("GET", uri, nil, nil)
if err != nil {
return nil, err
}
ret := []Container{}
err = json.Unmarshal(data, &ret)
if err != nil {
return nil, err
}
return ret, nil
}
func (client *DockerClient) InspectContainer(id string) (*ContainerInfo, error) {
uri := fmt.Sprintf("/%s/containers/%s/json", APIVersion, id)
data, err := client.doRequest("GET", uri, nil, nil)
if err != nil {
return nil, err
}
info := &ContainerInfo{}
err = json.Unmarshal(data, info)
if err != nil {
return nil, err
}
return info, nil
}
func (client *DockerClient) CreateContainer(config *ContainerConfig, name string) (string, error) {
data, err := json.Marshal(config)
if err != nil {
return "", err
}
uri := fmt.Sprintf("/%s/containers/create", APIVersion)
if name != "" {
v := url.Values{}
v.Set("name", name)
uri = fmt.Sprintf("%s?%s", uri, v.Encode())
}
data, err = client.doRequest("POST", uri, data, nil)
if err != nil {
return "", err
}
result := &RespContainersCreate{}
err = json.Unmarshal(data, result)
if err != nil {
return "", err
}
return result.Id, nil
}
func (client *DockerClient) ContainerLogs(id string, options *LogOptions) (io.ReadCloser, error) {
v := url.Values{}
v.Add("follow", strconv.FormatBool(options.Follow))
v.Add("stdout", strconv.FormatBool(options.Stdout))
v.Add("stderr", strconv.FormatBool(options.Stderr))
v.Add("timestamps", strconv.FormatBool(options.Timestamps))
if options.Tail > 0 {
v.Add("tail", strconv.FormatInt(options.Tail, 10))
}
uri := fmt.Sprintf("/%s/containers/%s/logs?%s", APIVersion, id, v.Encode())
req, err := http.NewRequest("GET", client.URL.String()+uri, nil)
if err != nil {
return nil, err
}
req.Header.Add("Content-Type", "application/json")
resp, err := client.HTTPClient.Do(req)
if err != nil {
return nil, err
}
return resp.Body, nil
}
func (client *DockerClient) ContainerChanges(id string) ([]*ContainerChanges, error) {
uri := fmt.Sprintf("/%s/containers/%s/changes", APIVersion, id)
data, err := client.doRequest("GET", uri, nil, nil)
if err != nil {
return nil, err
}
changes := []*ContainerChanges{}
err = json.Unmarshal(data, &changes)
if err != nil {
return nil, err
}
return changes, nil
}
func (client *DockerClient) readJSONStream(stream io.ReadCloser, decode func(*json.Decoder) decodingResult, stopChan <-chan struct{}) <-chan decodingResult {
resultChan := make(chan decodingResult)
go func() {
decodeChan := make(chan decodingResult)
go func() {
decoder := json.NewDecoder(stream)
for {
decodeResult := decode(decoder)
decodeChan <- decodeResult
if decodeResult.err != nil {
close(decodeChan)
return
}
}
}()
defer close(resultChan)
for {
select {
case <-stopChan:
stream.Close()
for _ = range decodeChan {
}
return
case decodeResult := <-decodeChan:
resultChan <- decodeResult
if decodeResult.err != nil {
stream.Close()
return
}
}
}
}()
return resultChan
}
func (client *DockerClient) StartContainer(id string, config *HostConfig) error {
data, err := json.Marshal(config)
if err != nil {
return err
}
uri := fmt.Sprintf("/%s/containers/%s/start", APIVersion, id)
_, err = client.doRequest("POST", uri, data, nil)
if err != nil {
return err
}
return nil
}
func (client *DockerClient) StopContainer(id string, timeout int) error {
uri := fmt.Sprintf("/%s/containers/%s/stop?t=%d", APIVersion, id, timeout)
_, err := client.doRequest("POST", uri, nil, nil)
if err != nil {
return err
}
return nil
}
func (client *DockerClient) RestartContainer(id string, timeout int) error {
uri := fmt.Sprintf("/%s/containers/%s/restart?t=%d", APIVersion, id, timeout)
_, err := client.doRequest("POST", uri, nil, nil)
if err != nil {
return err
}
return nil
}
func (client *DockerClient) KillContainer(id, signal string) error {
uri := fmt.Sprintf("/%s/containers/%s/kill?signal=%s", APIVersion, id, signal)
_, err := client.doRequest("POST", uri, nil, nil)
if err != nil {
return err
}
return nil
}
func (client *DockerClient) Wait(id string) <-chan WaitResult {
ch := make(chan WaitResult)
uri := fmt.Sprintf("/%s/containers/%s/wait", APIVersion, id)
go func() {
data, err := client.doRequest("POST", uri, nil, nil)
if err != nil {
ch <- WaitResult{ExitCode: -1, Error: err}
return
}
var result struct {
StatusCode int `json:"StatusCode"`
}
err = json.Unmarshal(data, &result)
ch <- WaitResult{ExitCode: result.StatusCode, Error: err}
}()
return ch
}
func (client *DockerClient) MonitorEvents(options *MonitorEventsOptions, stopChan <-chan struct{}) (<-chan EventOrError, error) {
v := url.Values{}
if options != nil {
if options.Since != 0 {
v.Add("since", strconv.Itoa(options.Since))
}
if options.Until != 0 {
v.Add("until", strconv.Itoa(options.Until))
}
if options.Filters != nil {
filterMap := make(map[string][]string)
if len(options.Filters.Event) > 0 {
filterMap["event"] = []string{options.Filters.Event}
}
if len(options.Filters.Image) > 0 {
filterMap["image"] = []string{options.Filters.Image}
}
if len(options.Filters.Container) > 0 {
filterMap["container"] = []string{options.Filters.Container}
}
if len(filterMap) > 0 {
filterJSONBytes, err := json.Marshal(filterMap)
if err != nil {
return nil, err
}
v.Add("filters", string(filterJSONBytes))
}
}
}
uri := fmt.Sprintf("%s/%s/events?%s", client.URL.String(), APIVersion, v.Encode())
resp, err := client.HTTPClient.Get(uri)
if err != nil {
return nil, err
}
decode := func(decoder *json.Decoder) decodingResult {
var event Event
if err := decoder.Decode(&event); err != nil {
return decodingResult{err: err}
} else {
return decodingResult{result: event}
}
}
decodingResultChan := client.readJSONStream(resp.Body, decode, stopChan)
eventOrErrorChan := make(chan EventOrError)
go func() {
for decodingResult := range decodingResultChan {
event, _ := decodingResult.result.(Event)
eventOrErrorChan <- EventOrError{
Event: event,
Error: decodingResult.err,
}
}
close(eventOrErrorChan)
}()
return eventOrErrorChan, nil
}
func (client *DockerClient) StartMonitorEvents(cb Callback, ec chan error, args ...interface{}) {
client.eventStopChan = make(chan struct{})
go func() {
eventErrChan, err := client.MonitorEvents(nil, client.eventStopChan)
if err != nil {
if ec != nil {
ec <- err
}
return
}
for e := range eventErrChan {
if e.Error != nil {
if ec != nil {
ec <- err
}
return
}
cb(&e.Event, ec, args...)
}
}()
}
func (client *DockerClient) StopAllMonitorEvents() {
close(client.eventStopChan)
}
func (client *DockerClient) StartMonitorStats(id string, cb StatCallback, ec chan error, args ...interface{}) {
atomic.StoreInt32(&client.monitorStats, 1)
go client.getStats(id, cb, ec, args...)
}
func (client *DockerClient) getStats(id string, cb StatCallback, ec chan error, args ...interface{}) {
uri := fmt.Sprintf("%s/%s/containers/%s/stats", client.URL.String(), APIVersion, id)
resp, err := client.HTTPClient.Get(uri)
if err != nil {
ec <- err
return
}
defer resp.Body.Close()
dec := json.NewDecoder(resp.Body)
for atomic.LoadInt32(&client.monitorStats) > 0 {
var stats *Stats
if err := dec.Decode(&stats); err != nil {
ec <- err
return
}
cb(id, stats, ec, args...)
}
}
func (client *DockerClient) StopAllMonitorStats() {
atomic.StoreInt32(&client.monitorStats, 0)
}
func (client *DockerClient) TagImage(nameOrID string, repo string, tag string, force bool) error {
v := url.Values{}
v.Set("repo", repo)
v.Set("tag", tag)
if force {
v.Set("force", "1")
}
uri := fmt.Sprintf("/%s/images/%s/tag?%s", APIVersion, nameOrID, v.Encode())
if _, err := client.doRequest("POST", uri, nil, nil); err != nil {
return err
}
return nil
}
func (client *DockerClient) Version() (*Version, error) {
uri := fmt.Sprintf("/%s/version", APIVersion)
data, err := client.doRequest("GET", uri, nil, nil)
if err != nil {
return nil, err
}
version := &Version{}
err = json.Unmarshal(data, version)
if err != nil {
return nil, err
}
return version, nil
}
func (client *DockerClient) PullImage(name string, auth *AuthConfig) error {
v := url.Values{}
v.Set("fromImage", name)
uri := fmt.Sprintf("/%s/images/create?%s", APIVersion, v.Encode())
req, err := http.NewRequest("POST", client.URL.String()+uri, nil)
if auth != nil {
encoded_auth, err := auth.encode()
if err != nil {
return err
}
req.Header.Add("X-Registry-Auth", encoded_auth)
}
resp, err := client.HTTPClient.Do(req)
if err != nil {
return err
}
defer resp.Body.Close()
if resp.StatusCode == 404 {
return ErrNotFound
}
if resp.StatusCode >= 400 {
data, err := ioutil.ReadAll(resp.Body)
if err != nil {
return err
}
return fmt.Errorf("%s", string(data))
}
var finalObj map[string]interface{}
for decoder := json.NewDecoder(resp.Body); err == nil; err = decoder.Decode(&finalObj) {
}
if err != io.EOF {
return err
}
if err, ok := finalObj["error"]; ok {
return fmt.Errorf("%v", err)
}
return nil
}
func (client *DockerClient) InspectImage(id string) (*ImageInfo, error) {
uri := fmt.Sprintf("/%s/images/%s/json", APIVersion, id)
data, err := client.doRequest("GET", uri, nil, nil)
if err != nil {
return nil, err
}
info := &ImageInfo{}
err = json.Unmarshal(data, info)
if err != nil {
return nil, err
}
return info, nil
}
func (client *DockerClient) LoadImage(reader io.Reader) error {
data, err := ioutil.ReadAll(reader)
if err != nil {
return err
}
uri := fmt.Sprintf("/%s/images/load", APIVersion)
_, err = client.doRequest("POST", uri, data, nil)
if err != nil {
return err
}
return nil
}
func (client *DockerClient) RemoveContainer(id string, force, volumes bool) error {
argForce := 0
argVolumes := 0
if force == true {
argForce = 1
}
if volumes == true {
argVolumes = 1
}
args := fmt.Sprintf("force=%d&v=%d", argForce, argVolumes)
uri := fmt.Sprintf("/%s/containers/%s?%s", APIVersion, id, args)
_, err := client.doRequest("DELETE", uri, nil, nil)
return err
}
func (client *DockerClient) ListImages(all bool) ([]*Image, error) {
argAll := 0
if all {
argAll = 1
}
uri := fmt.Sprintf("/%s/images/json?all=%d", APIVersion, argAll)
data, err := client.doRequest("GET", uri, nil, nil)
if err != nil {
return nil, err
}
var images []*Image
if err := json.Unmarshal(data, &images); err != nil {
return nil, err
}
return images, nil
}
func (client *DockerClient) RemoveImage(name string) ([]*ImageDelete, error) {
uri := fmt.Sprintf("/%s/images/%s", APIVersion, name)
data, err := client.doRequest("DELETE", uri, nil, nil)
if err != nil {
return nil, err
}
var imageDelete []*ImageDelete
if err := json.Unmarshal(data, &imageDelete); err != nil {
return nil, err
}
return imageDelete, nil
}
func (client *DockerClient) PauseContainer(id string) error {
uri := fmt.Sprintf("/%s/containers/%s/pause", APIVersion, id)
_, err := client.doRequest("POST", uri, nil, nil)
if err != nil {
return err
}
return nil
}
func (client *DockerClient) UnpauseContainer(id string) error {
uri := fmt.Sprintf("/%s/containers/%s/unpause", APIVersion, id)
_, err := client.doRequest("POST", uri, nil, nil)
if err != nil {
return err
}
return nil
}
func (client *DockerClient) Exec(config *ExecConfig) (string, error) {
data, err := json.Marshal(config)
if err != nil {
return "", err
}
uri := fmt.Sprintf("/containers/%s/exec", config.Container)
resp, err := client.doRequest("POST", uri, data, nil)
if err != nil {
return "", err
}
var createExecResp struct {
Id string
}
if err = json.Unmarshal(resp, &createExecResp); err != nil {
return "", err
}
uri = fmt.Sprintf("/exec/%s/start", createExecResp.Id)
resp, err = client.doRequest("POST", uri, data, nil)
if err != nil {
return "", err
}
return createExecResp.Id, nil
}
func (client *DockerClient) RenameContainer(oldName string, newName string) error {
uri := fmt.Sprintf("/containers/%s/rename?name=%s", oldName, newName)
_, err := client.doRequest("POST", uri, nil, nil)
return err
}
func (client *DockerClient) ImportImage(source string, repository string, tag string, tar io.Reader) (io.ReadCloser, error) {
var fromSrc string
v := &url.Values{}
if source == "" {
fromSrc = "-"
} else {
fromSrc = source
}
v.Set("fromSrc", fromSrc)
v.Set("repo", repository)
if tag != "" {
v.Set("tag", tag)
}
var in io.Reader
if fromSrc == "-" {
in = tar
}
return client.doStreamRequest("POST", "/images/create?"+v.Encode(), in, nil)
}
func (client *DockerClient) BuildImage(image *BuildImage) (io.ReadCloser, error) {
v := url.Values{}
if image.DockerfileName != "" {
v.Set("dockerfile", image.DockerfileName)
}
if image.RepoName != "" {
v.Set("t", image.RepoName)
}
if image.RemoteURL != "" {
v.Set("remote", image.RemoteURL)
}
if image.NoCache {
v.Set("nocache", "1")
}
if image.Pull {
v.Set("pull", "1")
}
if image.Remove {
v.Set("rm", "1")
} else {
v.Set("rm", "0")
}
if image.ForceRemove {
v.Set("forcerm", "1")
}
if image.SuppressOutput {
v.Set("q", "1")
}
v.Set("memory", strconv.FormatInt(image.Memory, 10))
v.Set("memswap", strconv.FormatInt(image.MemorySwap, 10))
v.Set("cpushares", strconv.FormatInt(image.CpuShares, 10))
v.Set("cpuperiod", strconv.FormatInt(image.CpuPeriod, 10))
v.Set("cpuquota", strconv.FormatInt(image.CpuQuota, 10))
v.Set("cpusetcpus", image.CpuSetCpus)
v.Set("cpusetmems", image.CpuSetMems)
v.Set("cgroupparent", image.CgroupParent)
headers := make(map[string]string)
if image.Config != nil {
encoded_config, err := image.Config.encode()
if err != nil {
return nil, err
}
headers["X-Registry-Config"] = encoded_config
}
if image.Context != nil {
headers["Content-Type"] = "application/tar"
}
uri := fmt.Sprintf("/%s/build?%s", APIVersion, v.Encode())
return client.doStreamRequest("POST", uri, image.Context, headers)
}