mirror of https://github.com/minio/minio.git
269 lines
8.5 KiB
Go
269 lines
8.5 KiB
Go
// Copyright (c) 2015-2021 MinIO, Inc.
|
|
//
|
|
// This file is part of MinIO Object Storage stack
|
|
//
|
|
// This program is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU Affero General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// This program is distributed in the hope that it will be useful
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU Affero General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Affero General Public License
|
|
// along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
package cmd
|
|
|
|
import (
|
|
"context"
|
|
"encoding/json"
|
|
"fmt"
|
|
"io"
|
|
"net/http"
|
|
"net/url"
|
|
"reflect"
|
|
"runtime"
|
|
"time"
|
|
|
|
"github.com/gorilla/mux"
|
|
"github.com/minio/minio-go/v7/pkg/set"
|
|
xhttp "github.com/minio/minio/internal/http"
|
|
"github.com/minio/minio/internal/logger"
|
|
"github.com/minio/minio/internal/rest"
|
|
"github.com/minio/pkg/env"
|
|
)
|
|
|
|
const (
|
|
bootstrapRESTVersion = "v1"
|
|
bootstrapRESTVersionPrefix = SlashSeparator + bootstrapRESTVersion
|
|
bootstrapRESTPrefix = minioReservedBucketPath + "/bootstrap"
|
|
bootstrapRESTPath = bootstrapRESTPrefix + bootstrapRESTVersionPrefix
|
|
)
|
|
|
|
const (
|
|
bootstrapRESTMethodHealth = "/health"
|
|
bootstrapRESTMethodVerify = "/verify"
|
|
)
|
|
|
|
// To abstract a node over network.
|
|
type bootstrapRESTServer struct{}
|
|
|
|
// ServerSystemConfig - captures information about server configuration.
|
|
type ServerSystemConfig struct {
|
|
MinioPlatform string
|
|
MinioEndpoints EndpointServerPools
|
|
MinioEnv map[string]string
|
|
}
|
|
|
|
// Diff - returns error on first difference found in two configs.
|
|
func (s1 ServerSystemConfig) Diff(s2 ServerSystemConfig) error {
|
|
if s1.MinioPlatform != s2.MinioPlatform {
|
|
return fmt.Errorf("Expected platform '%s', found to be running '%s'",
|
|
s1.MinioPlatform, s2.MinioPlatform)
|
|
}
|
|
if s1.MinioEndpoints.NEndpoints() != s2.MinioEndpoints.NEndpoints() {
|
|
return fmt.Errorf("Expected number of endpoints %d, seen %d", s1.MinioEndpoints.NEndpoints(),
|
|
s2.MinioEndpoints.NEndpoints())
|
|
}
|
|
|
|
for i, ep := range s1.MinioEndpoints {
|
|
if ep.SetCount != s2.MinioEndpoints[i].SetCount {
|
|
return fmt.Errorf("Expected set count %d, seen %d", ep.SetCount,
|
|
s2.MinioEndpoints[i].SetCount)
|
|
}
|
|
if ep.DrivesPerSet != s2.MinioEndpoints[i].DrivesPerSet {
|
|
return fmt.Errorf("Expected drives pet set %d, seen %d", ep.DrivesPerSet,
|
|
s2.MinioEndpoints[i].DrivesPerSet)
|
|
}
|
|
for j, endpoint := range ep.Endpoints {
|
|
if endpoint.String() != s2.MinioEndpoints[i].Endpoints[j].String() {
|
|
return fmt.Errorf("Expected endpoint %s, seen %s", endpoint,
|
|
s2.MinioEndpoints[i].Endpoints[j])
|
|
}
|
|
}
|
|
}
|
|
if !reflect.DeepEqual(s1.MinioEnv, s2.MinioEnv) {
|
|
var missing []string
|
|
var mismatching []string
|
|
for k, v := range s1.MinioEnv {
|
|
ev, ok := s2.MinioEnv[k]
|
|
if !ok {
|
|
missing = append(missing, k)
|
|
} else if v != ev {
|
|
mismatching = append(mismatching, k)
|
|
}
|
|
}
|
|
if len(mismatching) > 0 {
|
|
return fmt.Errorf(`Expected same MINIO_ environment variables and values across all servers: Missing environment values: %s / Mismatch environment values: %s`, missing, mismatching)
|
|
}
|
|
return fmt.Errorf(`Expected same MINIO_ environment variables and values across all servers: Missing environment values: %s`, missing)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
var skipEnvs = map[string]struct{}{
|
|
"MINIO_OPTS": {},
|
|
"MINIO_CERT_PASSWD": {},
|
|
"MINIO_SERVER_DEBUG": {},
|
|
}
|
|
|
|
func getServerSystemCfg() ServerSystemConfig {
|
|
envs := env.List("MINIO_")
|
|
envValues := make(map[string]string, len(envs))
|
|
for _, envK := range envs {
|
|
// skip certain environment variables as part
|
|
// of the whitelist and could be configured
|
|
// differently on each nodes, update skipEnvs()
|
|
// map if there are such environment values
|
|
if _, ok := skipEnvs[envK]; ok {
|
|
continue
|
|
}
|
|
envValues[envK] = env.Get(envK, "")
|
|
}
|
|
return ServerSystemConfig{
|
|
MinioPlatform: fmt.Sprintf("OS: %s | Arch: %s", runtime.GOOS, runtime.GOARCH),
|
|
MinioEndpoints: globalEndpoints,
|
|
MinioEnv: envValues,
|
|
}
|
|
}
|
|
|
|
// HealthHandler returns success if request is valid
|
|
func (b *bootstrapRESTServer) HealthHandler(w http.ResponseWriter, r *http.Request) {}
|
|
|
|
func (b *bootstrapRESTServer) VerifyHandler(w http.ResponseWriter, r *http.Request) {
|
|
ctx := newContext(r, w, "VerifyHandler")
|
|
cfg := getServerSystemCfg()
|
|
logger.LogIf(ctx, json.NewEncoder(w).Encode(&cfg))
|
|
}
|
|
|
|
// registerBootstrapRESTHandlers - register bootstrap rest router.
|
|
func registerBootstrapRESTHandlers(router *mux.Router) {
|
|
server := &bootstrapRESTServer{}
|
|
subrouter := router.PathPrefix(bootstrapRESTPrefix).Subrouter()
|
|
|
|
subrouter.Methods(http.MethodPost).Path(bootstrapRESTVersionPrefix + bootstrapRESTMethodHealth).HandlerFunc(
|
|
httpTraceHdrs(server.HealthHandler))
|
|
|
|
subrouter.Methods(http.MethodPost).Path(bootstrapRESTVersionPrefix + bootstrapRESTMethodVerify).HandlerFunc(
|
|
httpTraceHdrs(server.VerifyHandler))
|
|
}
|
|
|
|
// client to talk to bootstrap NEndpoints.
|
|
type bootstrapRESTClient struct {
|
|
endpoint Endpoint
|
|
restClient *rest.Client
|
|
}
|
|
|
|
// Wrapper to restClient.Call to handle network errors, in case of network error the connection is marked disconnected
|
|
// permanently. The only way to restore the connection is at the xl-sets layer by xlsets.monitorAndConnectEndpoints()
|
|
// after verifying format.json
|
|
func (client *bootstrapRESTClient) callWithContext(ctx context.Context, method string, values url.Values, body io.Reader, length int64) (respBody io.ReadCloser, err error) {
|
|
if values == nil {
|
|
values = make(url.Values)
|
|
}
|
|
|
|
respBody, err = client.restClient.Call(ctx, method, values, body, length)
|
|
if err == nil {
|
|
return respBody, nil
|
|
}
|
|
|
|
return nil, err
|
|
}
|
|
|
|
// Stringer provides a canonicalized representation of node.
|
|
func (client *bootstrapRESTClient) String() string {
|
|
return client.endpoint.String()
|
|
}
|
|
|
|
// Verify - fetches system server config.
|
|
func (client *bootstrapRESTClient) Verify(ctx context.Context, srcCfg ServerSystemConfig) (err error) {
|
|
if newObjectLayerFn() != nil {
|
|
return nil
|
|
}
|
|
respBody, err := client.callWithContext(ctx, bootstrapRESTMethodVerify, nil, nil, -1)
|
|
if err != nil {
|
|
return
|
|
}
|
|
defer xhttp.DrainBody(respBody)
|
|
recvCfg := ServerSystemConfig{}
|
|
if err = json.NewDecoder(respBody).Decode(&recvCfg); err != nil {
|
|
return err
|
|
}
|
|
return srcCfg.Diff(recvCfg)
|
|
}
|
|
|
|
func verifyServerSystemConfig(ctx context.Context, endpointServerPools EndpointServerPools) error {
|
|
srcCfg := getServerSystemCfg()
|
|
clnts := newBootstrapRESTClients(endpointServerPools)
|
|
var onlineServers int
|
|
var offlineEndpoints []string
|
|
var retries int
|
|
for onlineServers < len(clnts)/2 {
|
|
for _, clnt := range clnts {
|
|
if err := clnt.Verify(ctx, srcCfg); err != nil {
|
|
if isNetworkError(err) {
|
|
offlineEndpoints = append(offlineEndpoints, clnt.String())
|
|
continue
|
|
}
|
|
return fmt.Errorf("%s as has incorrect configuration: %w", clnt.String(), err)
|
|
}
|
|
onlineServers++
|
|
}
|
|
select {
|
|
case <-ctx.Done():
|
|
return ctx.Err()
|
|
default:
|
|
// Sleep for a while - so that we don't go into
|
|
// 100% CPU when half the endpoints are offline.
|
|
time.Sleep(100 * time.Millisecond)
|
|
retries++
|
|
// after 5 retries start logging that servers are not reachable yet
|
|
if retries >= 5 {
|
|
logger.Info(fmt.Sprintf("Waiting for atleast %d remote servers to be online for bootstrap check", len(clnts)/2))
|
|
if len(offlineEndpoints) > 0 {
|
|
logger.Info(fmt.Sprintf("Following servers are currently offline or unreachable %s", offlineEndpoints))
|
|
}
|
|
retries = 0 // reset to log again after 5 retries.
|
|
}
|
|
offlineEndpoints = nil
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func newBootstrapRESTClients(endpointServerPools EndpointServerPools) []*bootstrapRESTClient {
|
|
seenHosts := set.NewStringSet()
|
|
var clnts []*bootstrapRESTClient
|
|
for _, ep := range endpointServerPools {
|
|
for _, endpoint := range ep.Endpoints {
|
|
if seenHosts.Contains(endpoint.Host) {
|
|
continue
|
|
}
|
|
seenHosts.Add(endpoint.Host)
|
|
|
|
// Only proceed for remote endpoints.
|
|
if !endpoint.IsLocal {
|
|
clnts = append(clnts, newBootstrapRESTClient(endpoint))
|
|
}
|
|
}
|
|
}
|
|
return clnts
|
|
}
|
|
|
|
// Returns a new bootstrap client.
|
|
func newBootstrapRESTClient(endpoint Endpoint) *bootstrapRESTClient {
|
|
serverURL := &url.URL{
|
|
Scheme: endpoint.Scheme,
|
|
Host: endpoint.Host,
|
|
Path: bootstrapRESTPath,
|
|
}
|
|
|
|
restClient := rest.NewClient(serverURL, globalInternodeTransport, newCachedAuthToken())
|
|
restClient.HealthCheckFn = nil
|
|
|
|
return &bootstrapRESTClient{endpoint: endpoint, restClient: restClient}
|
|
}
|