minio/cmd/endpoint.go

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/*
* MinIO Cloud Storage, (C) 2017-2019 MinIO, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package cmd
import (
"context"
"fmt"
"net"
"net/url"
"path"
"path/filepath"
"runtime"
"strconv"
"strings"
"time"
humanize "github.com/dustin/go-humanize"
"github.com/minio/cli"
"github.com/minio/minio-go/v6/pkg/set"
"github.com/minio/minio/cmd/config"
"github.com/minio/minio/cmd/logger"
"github.com/minio/minio/pkg/env"
"github.com/minio/minio/pkg/mountinfo"
)
// EndpointType - enum for endpoint type.
type EndpointType int
const (
// PathEndpointType - path style endpoint type enum.
PathEndpointType EndpointType = iota + 1
// URLEndpointType - URL style endpoint type enum.
URLEndpointType
retryInterval = 5 // In Seconds.
)
// Endpoint - any type of endpoint.
type Endpoint struct {
*url.URL
IsLocal bool
SetIndex int
}
func (endpoint Endpoint) String() string {
if endpoint.Host == "" {
return endpoint.Path
}
return endpoint.URL.String()
}
// Type - returns type of endpoint.
func (endpoint Endpoint) Type() EndpointType {
if endpoint.Host == "" {
return PathEndpointType
}
return URLEndpointType
}
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// HTTPS - returns true if secure for URLEndpointType.
func (endpoint Endpoint) HTTPS() bool {
return endpoint.Scheme == "https"
}
// UpdateIsLocal - resolves the host and updates if it is local or not.
func (endpoint *Endpoint) UpdateIsLocal() (err error) {
if !endpoint.IsLocal {
endpoint.IsLocal, err = isLocalHost(endpoint.Hostname(), endpoint.Port(), globalMinioPort)
if err != nil {
return err
}
}
return nil
}
// NewEndpoint - returns new endpoint based on given arguments.
func NewEndpoint(arg string) (ep Endpoint, e error) {
// isEmptyPath - check whether given path is not empty.
isEmptyPath := func(path string) bool {
return path == "" || path == SlashSeparator || path == `\`
}
if isEmptyPath(arg) {
return ep, fmt.Errorf("empty or root endpoint is not supported")
}
var isLocal bool
var host string
u, err := url.Parse(arg)
if err == nil && u.Host != "" {
// URL style of endpoint.
// Valid URL style endpoint is
// - Scheme field must contain "http" or "https"
// - All field should be empty except Host and Path.
if !((u.Scheme == "http" || u.Scheme == "https") &&
u.User == nil && u.Opaque == "" && !u.ForceQuery && u.RawQuery == "" && u.Fragment == "") {
return ep, fmt.Errorf("invalid URL endpoint format")
}
var port string
host, port, err = net.SplitHostPort(u.Host)
if err != nil {
if !strings.Contains(err.Error(), "missing port in address") {
return ep, fmt.Errorf("invalid URL endpoint format: %s", err)
}
host = u.Host
} else {
var p int
p, err = strconv.Atoi(port)
if err != nil {
return ep, fmt.Errorf("invalid URL endpoint format: invalid port number")
} else if p < 1 || p > 65535 {
return ep, fmt.Errorf("invalid URL endpoint format: port number must be between 1 to 65535")
}
}
if i := strings.Index(host, "%"); i > -1 {
host = host[:i]
}
if host == "" {
return ep, fmt.Errorf("invalid URL endpoint format: empty host name")
}
// As this is path in the URL, we should use path package, not filepath package.
// On MS Windows, filepath.Clean() converts into Windows path style ie `/foo` becomes `\foo`
u.Path = path.Clean(u.Path)
if isEmptyPath(u.Path) {
return ep, fmt.Errorf("empty or root path is not supported in URL endpoint")
}
// On windows having a preceding SlashSeparator will cause problems, if the
// command line already has C:/<export-folder/ in it. Final resulting
// path on windows might become C:/C:/ this will cause problems
// of starting minio server properly in distributed mode on windows.
// As a special case make sure to trim the separator.
// NOTE: It is also perfectly fine for windows users to have a path
// without C:/ since at that point we treat it as relative path
// and obtain the full filesystem path as well. Providing C:/
// style is necessary to provide paths other than C:/,
// such as F:/, D:/ etc.
//
// Another additional benefit here is that this style also
// supports providing \\host\share support as well.
if runtime.GOOS == globalWindowsOSName {
if filepath.VolumeName(u.Path[1:]) != "" {
u.Path = u.Path[1:]
}
}
} else {
// Only check if the arg is an ip address and ask for scheme since its absent.
// localhost, example.com, any FQDN cannot be disambiguated from a regular file path such as
// /mnt/export1. So we go ahead and start the minio server in FS modes in these cases.
if isHostIP(arg) {
return ep, fmt.Errorf("invalid URL endpoint format: missing scheme http or https")
}
u = &url.URL{Path: path.Clean(arg)}
isLocal = true
}
return Endpoint{
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URL: u,
IsLocal: isLocal,
}, nil
}
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// ZoneEndpoints represent endpoints in a given zone
// along with its setCount and drivesPerSet.
type ZoneEndpoints struct {
SetCount int
DrivesPerSet int
Endpoints Endpoints
}
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// EndpointZones - list of list of endpoints
type EndpointZones []ZoneEndpoints
// FirstLocal returns true if the first endpoint is local.
func (l EndpointZones) FirstLocal() bool {
return l[0].Endpoints[0].IsLocal
}
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// HTTPS - returns true if secure for URLEndpointType.
func (l EndpointZones) HTTPS() bool {
return l[0].Endpoints.HTTPS()
}
// Nodes - returns all nodes count
func (l EndpointZones) Nodes() (count int) {
for _, ep := range l {
count += len(ep.Endpoints)
}
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return count
}
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// Endpoints - list of same type of endpoint.
type Endpoints []Endpoint
// HTTPS - returns true if secure for URLEndpointType.
func (endpoints Endpoints) HTTPS() bool {
return endpoints[0].HTTPS()
}
Move admin APIs to new path and add redesigned heal APIs (#5351) - Changes related to moving admin APIs - admin APIs now have an endpoint under /minio/admin - admin APIs are now versioned - a new API to server the version is added at "GET /minio/admin/version" and all API operations have the path prefix /minio/admin/v1/<operation> - new service stop API added - credentials change API is moved to /minio/admin/v1/config/credential - credentials change API and configuration get/set API now require TLS so that credentials are protected - all API requests now receive JSON - heal APIs are disabled as they will be changed substantially - Heal API changes Heal API is now provided at a single endpoint with the ability for a client to start a heal sequence on all the data in the server, a single bucket, or under a prefix within a bucket. When a heal sequence is started, the server returns a unique token that needs to be used for subsequent 'status' requests to fetch heal results. On each status request from the client, the server returns heal result records that it has accumulated since the previous status request. The server accumulates upto 1000 records and pauses healing further objects until the client requests for status. If the client does not request any further records for a long time, the server aborts the heal sequence automatically. A heal result record is returned for each entity healed on the server, such as system metadata, object metadata, buckets and objects, and has information about the before and after states on each disk. A client may request to force restart a heal sequence - this causes the running heal sequence to be aborted at the next safe spot and starts a new heal sequence.
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// GetString - returns endpoint string of i-th endpoint (0-based),
// and empty string for invalid indexes.
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func (endpoints Endpoints) GetString(i int) string {
Move admin APIs to new path and add redesigned heal APIs (#5351) - Changes related to moving admin APIs - admin APIs now have an endpoint under /minio/admin - admin APIs are now versioned - a new API to server the version is added at "GET /minio/admin/version" and all API operations have the path prefix /minio/admin/v1/<operation> - new service stop API added - credentials change API is moved to /minio/admin/v1/config/credential - credentials change API and configuration get/set API now require TLS so that credentials are protected - all API requests now receive JSON - heal APIs are disabled as they will be changed substantially - Heal API changes Heal API is now provided at a single endpoint with the ability for a client to start a heal sequence on all the data in the server, a single bucket, or under a prefix within a bucket. When a heal sequence is started, the server returns a unique token that needs to be used for subsequent 'status' requests to fetch heal results. On each status request from the client, the server returns heal result records that it has accumulated since the previous status request. The server accumulates upto 1000 records and pauses healing further objects until the client requests for status. If the client does not request any further records for a long time, the server aborts the heal sequence automatically. A heal result record is returned for each entity healed on the server, such as system metadata, object metadata, buckets and objects, and has information about the before and after states on each disk. A client may request to force restart a heal sequence - this causes the running heal sequence to be aborted at the next safe spot and starts a new heal sequence.
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if i < 0 || i >= len(endpoints) {
return ""
}
return endpoints[i].String()
}
// UpdateIsLocal - resolves the host and discovers the local host.
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func (endpoints Endpoints) UpdateIsLocal() error {
var epsResolved int
var foundLocal bool
resolvedList := make([]bool, len(endpoints))
// Mark the starting time
startTime := time.Now()
keepAliveTicker := time.NewTicker(retryInterval * time.Second)
defer keepAliveTicker.Stop()
for {
// Break if the local endpoint is found already Or all the endpoints are resolved.
if foundLocal || (epsResolved == len(endpoints)) {
break
}
// Retry infinitely on Kubernetes and Docker swarm.
// This is needed as the remote hosts are sometime
// not available immediately.
select {
case <-globalOSSignalCh:
return fmt.Errorf("The endpoint resolution got interrupted")
default:
for i, resolved := range resolvedList {
if resolved {
// Continue if host is already resolved.
continue
}
// return err if not Docker or Kubernetes
// We use IsDocker() to check for Docker environment
// We use IsKubernetes() to check for Kubernetes environment
isLocal, err := isLocalHost(endpoints[i].Hostname(), endpoints[i].Port(), globalMinioPort)
if err != nil {
if !IsDocker() && !IsKubernetes() {
return err
}
// time elapsed
timeElapsed := time.Since(startTime)
// log error only if more than 1s elapsed
if timeElapsed > time.Second {
// Log the message to console about the host not being resolveable.
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reqInfo := (&logger.ReqInfo{}).AppendTags("host", endpoints[i].Hostname())
reqInfo.AppendTags("elapsedTime",
humanize.RelTime(startTime, startTime.Add(timeElapsed),
"elapsed", ""))
ctx := logger.SetReqInfo(context.Background(), reqInfo)
logger.LogIf(ctx, err, logger.Application)
}
} else {
resolvedList[i] = true
endpoints[i].IsLocal = isLocal
epsResolved++
if !foundLocal {
foundLocal = isLocal
}
}
}
// Wait for the tick, if the there exist a local endpoint in discovery.
// Non docker/kubernetes environment we do not need to wait.
if !foundLocal && (IsDocker() || IsKubernetes()) {
<-keepAliveTicker.C
}
}
}
// On Kubernetes/Docker setups DNS resolves inappropriately sometimes
// where there are situations same endpoints with multiple disks
// come online indicating either one of them is local and some
// of them are not local. This situation can never happen and
// its only a possibility in orchestrated deployments with dynamic
// DNS. Following code ensures that we treat if one of the endpoint
// says its local for a given host - it is true for all endpoints
// for the same host. Following code ensures that this assumption
// is true and it works in all scenarios and it is safe to assume
// for a given host.
endpointLocalMap := make(map[string]bool)
for _, ep := range endpoints {
if ep.IsLocal {
endpointLocalMap[ep.Host] = ep.IsLocal
}
}
for i := range endpoints {
endpoints[i].IsLocal = endpointLocalMap[endpoints[i].Host]
}
return nil
}
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// NewEndpoints - returns new endpoint list based on input args.
func NewEndpoints(args ...string) (endpoints Endpoints, err error) {
var endpointType EndpointType
var scheme string
uniqueArgs := set.NewStringSet()
// Loop through args and adds to endpoint list.
for i, arg := range args {
endpoint, err := NewEndpoint(arg)
if err != nil {
return nil, fmt.Errorf("'%s': %s", arg, err.Error())
}
// All endpoints have to be same type and scheme if applicable.
if i == 0 {
endpointType = endpoint.Type()
scheme = endpoint.Scheme
} else if endpoint.Type() != endpointType {
return nil, fmt.Errorf("mixed style endpoints are not supported")
} else if endpoint.Scheme != scheme {
return nil, fmt.Errorf("mixed scheme is not supported")
}
arg = endpoint.String()
if uniqueArgs.Contains(arg) {
return nil, fmt.Errorf("duplicate endpoints found")
}
uniqueArgs.Add(arg)
endpoints = append(endpoints, endpoint)
}
return endpoints, nil
}
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func checkEndpointsSubOptimal(ctx *cli.Context, setupType SetupType, endpointZones EndpointZones) (err error) {
// Validate sub optimal ordering only for distributed setup.
if setupType != DistXLSetupType {
return nil
}
var endpointOrder int
err = fmt.Errorf("Too many disk args are local, input is in sub-optimal order. Please review input args: %s", ctx.Args())
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for _, endpoints := range endpointZones {
for _, endpoint := range endpoints.Endpoints {
if endpoint.IsLocal {
endpointOrder++
} else {
endpointOrder--
}
if endpointOrder >= 2 {
return err
}
}
}
return nil
}
// Checks if there are any cross device mounts.
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func checkCrossDeviceMounts(endpoints Endpoints) (err error) {
var absPaths []string
for _, endpoint := range endpoints {
if endpoint.IsLocal {
var absPath string
absPath, err = filepath.Abs(endpoint.Path)
if err != nil {
return err
}
absPaths = append(absPaths, absPath)
}
}
return mountinfo.CheckCrossDevice(absPaths)
}
// CreateEndpoints - validates and creates new endpoints for given args.
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func CreateEndpoints(serverAddr string, args ...[]string) (Endpoints, SetupType, error) {
var endpoints Endpoints
var setupType SetupType
var err error
// Check whether serverAddr is valid for this host.
if err = CheckLocalServerAddr(serverAddr); err != nil {
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return endpoints, setupType, err
}
_, serverAddrPort := mustSplitHostPort(serverAddr)
// For single arg, return FS setup.
if len(args) == 1 && len(args[0]) == 1 {
var endpoint Endpoint
endpoint, err = NewEndpoint(args[0][0])
if err != nil {
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return endpoints, setupType, err
}
if err := endpoint.UpdateIsLocal(); err != nil {
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return endpoints, setupType, err
}
if endpoint.Type() != PathEndpointType {
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return endpoints, setupType, config.ErrInvalidFSEndpoint(nil).Msg("use path style endpoint for FS setup")
}
endpoints = append(endpoints, endpoint)
setupType = FSSetupType
// Check for cross device mounts if any.
if err = checkCrossDeviceMounts(endpoints); err != nil {
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return endpoints, setupType, config.ErrInvalidFSEndpoint(nil).Msg(err.Error())
}
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return endpoints, setupType, nil
}
for i, iargs := range args {
// Convert args to endpoints
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var newEndpoints Endpoints
eps, err := NewEndpoints(iargs...)
if err != nil {
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return endpoints, setupType, config.ErrInvalidErasureEndpoints(nil).Msg(err.Error())
}
// Check for cross device mounts if any.
if err = checkCrossDeviceMounts(eps); err != nil {
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return endpoints, setupType, config.ErrInvalidErasureEndpoints(nil).Msg(err.Error())
}
for _, ep := range eps {
ep.SetIndex = i
newEndpoints = append(newEndpoints, ep)
}
endpoints = append(endpoints, newEndpoints...)
}
if len(endpoints) == 0 {
return endpoints, setupType, config.ErrInvalidErasureEndpoints(nil).Msg("invalid number of endpoints")
}
// Return XL setup when all endpoints are path style.
if endpoints[0].Type() == PathEndpointType {
setupType = XLSetupType
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return endpoints, setupType, nil
}
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if err = endpoints.UpdateIsLocal(); err != nil {
return endpoints, setupType, config.ErrInvalidErasureEndpoints(nil).Msg(err.Error())
}
// Here all endpoints are URL style.
endpointPathSet := set.NewStringSet()
localEndpointCount := 0
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localServerHostSet := set.NewStringSet()
localPortSet := set.NewStringSet()
for _, endpoint := range endpoints {
endpointPathSet.Add(endpoint.Path)
if endpoint.IsLocal {
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localServerHostSet.Add(endpoint.Hostname())
var port string
_, port, err = net.SplitHostPort(endpoint.Host)
if err != nil {
port = serverAddrPort
}
localPortSet.Add(port)
localEndpointCount++
}
}
// Check whether same path is not used in endpoints of a host on different port.
{
pathIPMap := make(map[string]set.StringSet)
for _, endpoint := range endpoints {
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host := endpoint.Hostname()
hostIPSet, _ := getHostIP(host)
if IPSet, ok := pathIPMap[endpoint.Path]; ok {
if !IPSet.Intersection(hostIPSet).IsEmpty() {
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return endpoints, setupType,
config.ErrInvalidErasureEndpoints(nil).Msg(fmt.Sprintf("path '%s' can not be served by different port on same address", endpoint.Path))
}
pathIPMap[endpoint.Path] = IPSet.Union(hostIPSet)
} else {
pathIPMap[endpoint.Path] = hostIPSet
}
}
}
// Check whether same path is used for more than 1 local endpoints.
{
localPathSet := set.CreateStringSet()
for _, endpoint := range endpoints {
if !endpoint.IsLocal {
continue
}
if localPathSet.Contains(endpoint.Path) {
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return endpoints, setupType,
config.ErrInvalidErasureEndpoints(nil).Msg(fmt.Sprintf("path '%s' cannot be served by different address on same server", endpoint.Path))
}
localPathSet.Add(endpoint.Path)
}
}
// All endpoints are pointing to local host
if len(endpoints) == localEndpointCount {
// If all endpoints have same port number, then this is XL setup using URL style endpoints.
if len(localPortSet) == 1 {
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if len(localServerHostSet) > 1 {
return endpoints, setupType,
config.ErrInvalidErasureEndpoints(nil).Msg("all local endpoints should not have different hostnames/ips")
}
return endpoints, XLSetupType, nil
}
// Even though all endpoints are local, but those endpoints use different ports.
// This means it is DistXL setup.
}
// Add missing port in all endpoints.
for i := range endpoints {
_, port, err := net.SplitHostPort(endpoints[i].Host)
if err != nil {
endpoints[i].Host = net.JoinHostPort(endpoints[i].Host, serverAddrPort)
} else if endpoints[i].IsLocal && serverAddrPort != port {
// If endpoint is local, but port is different than serverAddrPort, then make it as remote.
endpoints[i].IsLocal = false
}
}
uniqueArgs := set.NewStringSet()
for _, endpoint := range endpoints {
uniqueArgs.Add(endpoint.Host)
}
// Error out if we have less than 2 unique servers.
if len(uniqueArgs.ToSlice()) < 2 && setupType == DistXLSetupType {
err := fmt.Errorf("Unsupported number of endpoints (%s), minimum number of servers cannot be less than 2 in distributed setup", endpoints)
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return endpoints, setupType, err
}
publicIPs := env.Get(config.EnvPublicIPs, "")
if len(publicIPs) == 0 {
updateDomainIPs(uniqueArgs)
}
setupType = DistXLSetupType
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return endpoints, setupType, nil
}
// GetLocalPeer - returns local peer value, returns globalMinioAddr
// for FS and Erasure mode. In case of distributed server return
// the first element from the set of peers which indicate that
// they are local. There is always one entry that is local
// even with repeated server endpoints.
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func GetLocalPeer(endpointZones EndpointZones) (localPeer string) {
peerSet := set.NewStringSet()
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for _, ep := range endpointZones {
for _, endpoint := range ep.Endpoints {
if endpoint.Type() != URLEndpointType {
continue
}
if endpoint.IsLocal && endpoint.Host != "" {
peerSet.Add(endpoint.Host)
}
}
}
if peerSet.IsEmpty() {
// Local peer can be empty in FS or Erasure coded mode.
// If so, return globalMinioHost + globalMinioPort value.
if globalMinioHost != "" {
return net.JoinHostPort(globalMinioHost, globalMinioPort)
}
return net.JoinHostPort("127.0.0.1", globalMinioPort)
}
return peerSet.ToSlice()[0]
}
// GetRemotePeers - get hosts information other than this minio service.
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func GetRemotePeers(endpointZones EndpointZones) []string {
peerSet := set.NewStringSet()
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for _, ep := range endpointZones {
for _, endpoint := range ep.Endpoints {
if endpoint.Type() != URLEndpointType {
continue
}
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peer := endpoint.Host
if endpoint.IsLocal {
if _, port := mustSplitHostPort(peer); port == globalMinioPort {
continue
}
}
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peerSet.Add(peer)
}
}
return peerSet.ToSlice()
}
func updateDomainIPs(endPoints set.StringSet) {
ipList := set.NewStringSet()
for e := range endPoints {
host, port, err := net.SplitHostPort(e)
if err != nil {
if strings.Contains(err.Error(), "missing port in address") {
host = e
port = globalMinioPort
} else {
continue
}
}
IPs, err := getHostIP(host)
if err != nil {
continue
}
IPsWithPort := IPs.ApplyFunc(func(ip string) string {
return net.JoinHostPort(ip, port)
})
ipList = ipList.Union(IPsWithPort)
}
globalDomainIPs = ipList.FuncMatch(func(ip string, matchString string) bool {
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host, _, err := net.SplitHostPort(ip)
if err != nil {
host = ip
}
return !net.ParseIP(host).IsLoopback()
}, "")
}