// If logerr is true, it prints out more error messages.
func getClusterFromRemotePeers(urls []string, timeout time.Duration, logerr bool, rt http.RoundTripper) (*membership.RaftCluster, error) {
cc := &http.Client{
Transport: rt,
Timeout: timeout,
}
for _, u := range urls {
resp, err := cc.Get(u + "/members")
if err != nil {
if logerr {
plog.Warningf("could not get cluster response from %s: %v", u, err)
}
continue
}
b, err := ioutil.ReadAll(resp.Body)
resp.Body.Close()
if err != nil {
if logerr {
plog.Warningf("could not read the body of cluster response: %v", err)
}
continue
}
var membs []*membership.Member
if err = json.Unmarshal(b, &membs); err != nil {
if logerr {
plog.Warningf("could not unmarshal cluster response: %v", err)
}
continue
}
id, err := types.IDFromString(resp.Header.Get("X-Etcd-Cluster-ID"))
if err != nil {
if logerr {
plog.Warningf("could not parse the cluster ID from cluster res: %v", err)
}
continue
}
// check the length of membership members
// if the membership members are present then prepare and return raft cluster
// if membership members are not present then the raft cluster formed will be
// an invalid empty cluster hence return failed to get raft cluster member(s) from the given urls error
if len(membs) > 0 {
return membership.NewClusterFromMembers("", id, membs), nil
}
return nil, fmt.Errorf("failed to get raft cluster member(s) from the given urls.")
}
return nil, fmt.Errorf("could not retrieve cluster information from the given urls")
}
// If logerr is true, it prints out more error messages.
func getClusterFromRemotePeers(urls []string, timeout time.Duration, logerr bool, rt http.RoundTripper) (*membership.RaftCluster, error) {
cc := &http.Client{
Transport: rt,
Timeout: timeout,
}
for _, u := range urls {
resp, err := cc.Get(u + "/members")
if err != nil {
if logerr {
plog.Warningf("could not get cluster response from %s: %v", u, err)
}
continue
}
b, err := ioutil.ReadAll(resp.Body)
resp.Body.Close()
if err != nil {
if logerr {
plog.Warningf("could not read the body of cluster response: %v", err)
}
continue
}
var membs []*membership.Member
if err = json.Unmarshal(b, &membs); err != nil {
if logerr {
plog.Warningf("could not unmarshal cluster response: %v", err)
}
continue
}
id, err := types.IDFromString(resp.Header.Get("X-Etcd-Cluster-ID"))
if err != nil {
if logerr {
plog.Warningf("could not parse the cluster ID from cluster res: %v", err)
}
continue
}
return membership.NewClusterFromMembers("", id, membs), nil
}
return nil, fmt.Errorf("could not retrieve cluster information from the given urls")
}
func TestGetOtherPeerURLs(t *testing.T) {
tests := []struct {
membs []*membership.Member
wurls []string
}{
{
[]*membership.Member{
membership.NewMember("1", types.MustNewURLs([]string{"http://10.0.0.1:1"}), "a", nil),
},
[]string{},
},
{
[]*membership.Member{
membership.NewMember("1", types.MustNewURLs([]string{"http://10.0.0.1:1"}), "a", nil),
membership.NewMember("2", types.MustNewURLs([]string{"http://10.0.0.2:2"}), "a", nil),
membership.NewMember("3", types.MustNewURLs([]string{"http://10.0.0.3:3"}), "a", nil),
},
[]string{"http://10.0.0.2:2", "http://10.0.0.3:3"},
},
{
[]*membership.Member{
membership.NewMember("1", types.MustNewURLs([]string{"http://10.0.0.1:1"}), "a", nil),
membership.NewMember("3", types.MustNewURLs([]string{"http://10.0.0.3:3"}), "a", nil),
membership.NewMember("2", types.MustNewURLs([]string{"http://10.0.0.2:2"}), "a", nil),
},
[]string{"http://10.0.0.2:2", "http://10.0.0.3:3"},
},
}
for i, tt := range tests {
cl := membership.NewClusterFromMembers("", types.ID(0), tt.membs)
self := "1"
urls := getRemotePeerURLs(cl, self)
if !reflect.DeepEqual(urls, tt.wurls) {
t.Errorf("#%d: urls = %+v, want %+v", i, urls, tt.wurls)
}
}
}