mirror of https://github.com/docker/docs.git
96 lines
2.1 KiB
Go
96 lines
2.1 KiB
Go
package token
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import (
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"encoding/json"
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"fmt"
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"io/ioutil"
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"net/http"
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"strings"
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"time"
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"github.com/docker/swarm/discovery"
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)
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const DISCOVERY_URL = "https://discovery-stage.hub.docker.com/v1"
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type TokenDiscoveryService struct {
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heartbeat int
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url string
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token string
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}
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func init() {
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discovery.Register("token",
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func() discovery.DiscoveryService {
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return &TokenDiscoveryService{}
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},
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)
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}
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func (s *TokenDiscoveryService) Initialize(urltoken string, heartbeat int) error {
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if i := strings.LastIndex(urltoken, "/"); i != -1 {
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s.url = "https://" + urltoken[:i]
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s.token = urltoken[i+1:]
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} else {
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s.url = DISCOVERY_URL
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s.token = urltoken
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}
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s.heartbeat = heartbeat
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return nil
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}
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// FetchNodes returns the node for the discovery service at the specified endpoint
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func (s *TokenDiscoveryService) Fetch() ([]*discovery.Node, error) {
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resp, err := http.Get(fmt.Sprintf("%s/%s/%s", s.url, "clusters", s.token))
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if err != nil {
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return nil, err
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}
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if resp.Body != nil {
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defer resp.Body.Close()
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}
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var addrs []string
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if resp.StatusCode == http.StatusOK {
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if err := json.NewDecoder(resp.Body).Decode(&addrs); err != nil {
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return nil, err
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}
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}
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var nodes []*discovery.Node
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for _, addr := range addrs {
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nodes = append(nodes, discovery.NewNode(addr))
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}
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return nodes, nil
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}
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func (s *TokenDiscoveryService) Watch(callback discovery.WatchCallback) {
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for _ = range time.Tick(time.Duration(s.heartbeat) * time.Second) {
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nodes, err := s.Fetch()
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if err == nil {
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callback(nodes)
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}
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}
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}
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// RegisterNode adds a new node identified by the into the discovery service
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func (s *TokenDiscoveryService) Register(addr string) error {
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buf := strings.NewReader(addr)
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_, err := http.Post(fmt.Sprintf("%s/%s/%s", s.url,
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"clusters", s.token), "application/json", buf)
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return err
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}
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// CreateCluster returns a unique cluster token
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func (s *TokenDiscoveryService) CreateCluster() (string, error) {
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resp, err := http.Post(fmt.Sprintf("%s/%s", s.url, "clusters"), "", nil)
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if err != nil {
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return "", err
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}
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token, err := ioutil.ReadAll(resp.Body)
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return string(token), err
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}
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