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6f6a2214fc
- total number of S3 API calls per server - maximum wait duration for any S3 API call This implementation is primarily meant for situations where HDDs are not capable enough to handle the incoming workload and there is no way to throttle the client. This feature allows MinIO server to throttle itself such that we do not overwhelm the HDDs.
258 lines
7.5 KiB
Go
258 lines
7.5 KiB
Go
/*
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* MinIO Cloud Storage, (C) 2019 MinIO, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package cmd
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import (
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"context"
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"crypto/tls"
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"encoding/json"
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"fmt"
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"io"
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"net/http"
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"net/url"
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"runtime"
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"sync/atomic"
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"time"
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"github.com/gorilla/mux"
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"github.com/minio/minio-go/v6/pkg/set"
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xhttp "github.com/minio/minio/cmd/http"
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"github.com/minio/minio/cmd/logger"
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"github.com/minio/minio/cmd/rest"
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)
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const (
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bootstrapRESTVersion = "v1"
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bootstrapRESTVersionPrefix = SlashSeparator + bootstrapRESTVersion
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bootstrapRESTPrefix = minioReservedBucketPath + "/bootstrap"
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bootstrapRESTPath = bootstrapRESTPrefix + bootstrapRESTVersionPrefix
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)
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const (
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bootstrapRESTMethodVerify = "/verify"
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)
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// To abstract a node over network.
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type bootstrapRESTServer struct{}
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// ServerSystemConfig - captures information about server configuration.
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type ServerSystemConfig struct {
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MinioPlatform string
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MinioRuntime string
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MinioEndpoints EndpointZones
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}
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// Diff - returns error on first difference found in two configs.
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func (s1 ServerSystemConfig) Diff(s2 ServerSystemConfig) error {
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if s1.MinioPlatform != s2.MinioPlatform {
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return fmt.Errorf("Expected platform '%s', found to be running '%s'",
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s1.MinioPlatform, s2.MinioPlatform)
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}
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if s1.MinioEndpoints.NEndpoints() != s2.MinioEndpoints.NEndpoints() {
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return fmt.Errorf("Expected number of endpoints %d, seen %d", s1.MinioEndpoints.NEndpoints(),
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s2.MinioEndpoints.NEndpoints())
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}
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for i, ep := range s1.MinioEndpoints {
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if ep.SetCount != s2.MinioEndpoints[i].SetCount {
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return fmt.Errorf("Expected set count %d, seen %d", ep.SetCount,
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s2.MinioEndpoints[i].SetCount)
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}
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if ep.DrivesPerSet != s2.MinioEndpoints[i].DrivesPerSet {
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return fmt.Errorf("Expected drives pet set %d, seen %d", ep.DrivesPerSet,
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s2.MinioEndpoints[i].DrivesPerSet)
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}
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for j, endpoint := range ep.Endpoints {
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if endpoint.String() != s2.MinioEndpoints[i].Endpoints[j].String() {
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return fmt.Errorf("Expected endpoint %s, seen %s", endpoint,
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s2.MinioEndpoints[i].Endpoints[j])
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}
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}
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}
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return nil
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}
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func getServerSystemCfg() ServerSystemConfig {
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return ServerSystemConfig{
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MinioPlatform: fmt.Sprintf("OS: %s | Arch: %s", runtime.GOOS, runtime.GOARCH),
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MinioEndpoints: globalEndpoints,
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}
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}
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func (b *bootstrapRESTServer) VerifyHandler(w http.ResponseWriter, r *http.Request) {
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ctx := newContext(r, w, "VerifyHandler")
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cfg := getServerSystemCfg()
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logger.LogIf(ctx, json.NewEncoder(w).Encode(&cfg))
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w.(http.Flusher).Flush()
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}
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// registerBootstrapRESTHandlers - register bootstrap rest router.
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func registerBootstrapRESTHandlers(router *mux.Router) {
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server := &bootstrapRESTServer{}
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subrouter := router.PathPrefix(bootstrapRESTPrefix).Subrouter()
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subrouter.Methods(http.MethodPost).Path(bootstrapRESTVersionPrefix + bootstrapRESTMethodVerify).HandlerFunc(
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httpTraceHdrs(server.VerifyHandler))
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}
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// client to talk to bootstrap NEndpoints.
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type bootstrapRESTClient struct {
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endpoint Endpoint
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restClient *rest.Client
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connected int32
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}
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// Reconnect to a bootstrap rest server.k
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func (client *bootstrapRESTClient) reConnect() {
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atomic.StoreInt32(&client.connected, 1)
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}
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// Wrapper to restClient.Call to handle network errors, in case of network error the connection is marked disconnected
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// permanently. The only way to restore the connection is at the xl-sets layer by xlsets.monitorAndConnectEndpoints()
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// after verifying format.json
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func (client *bootstrapRESTClient) call(method string, values url.Values, body io.Reader, length int64) (respBody io.ReadCloser, err error) {
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return client.callWithContext(context.Background(), method, values, body, length)
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}
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// Wrapper to restClient.Call to handle network errors, in case of network error the connection is marked disconnected
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// permanently. The only way to restore the connection is at the xl-sets layer by xlsets.monitorAndConnectEndpoints()
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// after verifying format.json
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func (client *bootstrapRESTClient) callWithContext(ctx context.Context, method string, values url.Values, body io.Reader, length int64) (respBody io.ReadCloser, err error) {
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if !client.IsOnline() {
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client.reConnect()
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}
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if values == nil {
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values = make(url.Values)
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}
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respBody, err = client.restClient.CallWithContext(ctx, method, values, body, length)
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if err == nil {
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return respBody, nil
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}
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if isNetworkError(err) {
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atomic.StoreInt32(&client.connected, 0)
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}
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return nil, err
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}
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// Stringer provides a canonicalized representation of node.
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func (client *bootstrapRESTClient) String() string {
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return client.endpoint.String()
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}
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// IsOnline - returns whether RPC client failed to connect or not.
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func (client *bootstrapRESTClient) IsOnline() bool {
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return atomic.LoadInt32(&client.connected) == 1
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}
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// Close - marks the client as closed.
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func (client *bootstrapRESTClient) Close() error {
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atomic.StoreInt32(&client.connected, 0)
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client.restClient.Close()
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return nil
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}
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// Verify - fetches system server config.
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func (client *bootstrapRESTClient) Verify(srcCfg ServerSystemConfig) (err error) {
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if newObjectLayerFn() != nil {
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return nil
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}
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respBody, err := client.call(bootstrapRESTMethodVerify, nil, nil, -1)
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if err != nil {
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return
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}
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defer xhttp.DrainBody(respBody)
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recvCfg := ServerSystemConfig{}
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if err = json.NewDecoder(respBody).Decode(&recvCfg); err != nil {
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return err
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}
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return srcCfg.Diff(recvCfg)
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}
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func verifyServerSystemConfig(endpointZones EndpointZones) error {
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srcCfg := getServerSystemCfg()
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clnts := newBootstrapRESTClients(endpointZones)
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var onlineServers int
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for onlineServers < len(clnts)/2 {
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for _, clnt := range clnts {
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if err := clnt.Verify(srcCfg); err != nil {
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if isNetworkError(err) {
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continue
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}
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return fmt.Errorf("%s as has incorrect configuration: %w", clnt.String(), err)
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}
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onlineServers++
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}
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// Sleep for a while - so that we don't go into
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// 100% CPU when half the endpoints are offline.
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time.Sleep(500 * time.Millisecond)
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}
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return nil
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}
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func newBootstrapRESTClients(endpointZones EndpointZones) []*bootstrapRESTClient {
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seenHosts := set.NewStringSet()
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var clnts []*bootstrapRESTClient
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for _, ep := range endpointZones {
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for _, endpoint := range ep.Endpoints {
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if seenHosts.Contains(endpoint.Host) {
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continue
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}
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seenHosts.Add(endpoint.Host)
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// Only proceed for remote endpoints.
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if !endpoint.IsLocal {
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clnt, err := newBootstrapRESTClient(endpoint)
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if err != nil {
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continue
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}
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clnts = append(clnts, clnt)
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}
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}
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}
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return clnts
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}
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// Returns a new bootstrap client.
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func newBootstrapRESTClient(endpoint Endpoint) (*bootstrapRESTClient, error) {
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serverURL := &url.URL{
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Scheme: endpoint.Scheme,
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Host: endpoint.Host,
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Path: bootstrapRESTPath,
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}
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var tlsConfig *tls.Config
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if globalIsSSL {
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tlsConfig = &tls.Config{
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ServerName: endpoint.Hostname(),
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RootCAs: globalRootCAs,
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}
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}
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trFn := newCustomHTTPTransport(tlsConfig, rest.DefaultRESTTimeout, rest.DefaultRESTTimeout)
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restClient, err := rest.NewClient(serverURL, trFn, newAuthToken)
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if err != nil {
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return nil, err
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}
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return &bootstrapRESTClient{endpoint: endpoint, restClient: restClient, connected: 1}, nil
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}
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