mirror of
https://github.com/minio/minio.git
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563 lines
15 KiB
Go
563 lines
15 KiB
Go
// Copyright (c) 2015-2021 MinIO, Inc.
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//
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// This file is part of MinIO Object Storage stack
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package cmd
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import (
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"context"
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"encoding/json"
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"path"
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"strings"
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"sync"
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"time"
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"unicode/utf8"
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jsoniter "github.com/json-iterator/go"
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"github.com/minio/minio-go/v7/pkg/set"
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"github.com/minio/minio/internal/auth"
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"github.com/minio/minio/internal/config"
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"github.com/minio/minio/internal/kms"
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"github.com/minio/minio/internal/logger"
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iampolicy "github.com/minio/pkg/iam/policy"
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"go.etcd.io/etcd/api/v3/mvccpb"
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etcd "go.etcd.io/etcd/client/v3"
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)
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var defaultContextTimeout = 30 * time.Second
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func etcdKvsToSet(prefix string, kvs []*mvccpb.KeyValue) set.StringSet {
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users := set.NewStringSet()
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for _, kv := range kvs {
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user := extractPathPrefixAndSuffix(string(kv.Key), prefix, path.Base(string(kv.Key)))
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users.Add(user)
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}
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return users
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}
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// Extract path string by stripping off the `prefix` value and the suffix,
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// value, usually in the following form.
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// s := "config/iam/users/foo/config.json"
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// prefix := "config/iam/users/"
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// suffix := "config.json"
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// result is foo
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func extractPathPrefixAndSuffix(s string, prefix string, suffix string) string {
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return pathClean(strings.TrimSuffix(strings.TrimPrefix(s, prefix), suffix))
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}
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// IAMEtcdStore implements IAMStorageAPI
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type IAMEtcdStore struct {
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sync.RWMutex
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client *etcd.Client
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}
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func newIAMEtcdStore(client *etcd.Client) *IAMEtcdStore {
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return &IAMEtcdStore{client: client}
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}
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func (ies *IAMEtcdStore) lock() {
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ies.Lock()
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}
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func (ies *IAMEtcdStore) unlock() {
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ies.Unlock()
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}
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func (ies *IAMEtcdStore) rlock() {
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ies.RLock()
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}
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func (ies *IAMEtcdStore) runlock() {
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ies.RUnlock()
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}
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func (ies *IAMEtcdStore) saveIAMConfig(ctx context.Context, item interface{}, itemPath string, opts ...options) error {
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data, err := json.Marshal(item)
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if err != nil {
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return err
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}
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if GlobalKMS != nil {
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data, err = config.EncryptBytes(GlobalKMS, data, kms.Context{
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minioMetaBucket: path.Join(minioMetaBucket, itemPath),
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})
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if err != nil {
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return err
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}
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}
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return saveKeyEtcd(ctx, ies.client, itemPath, data, opts...)
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}
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func getIAMConfig(item interface{}, data []byte, itemPath string) error {
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var err error
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if !utf8.Valid(data) && GlobalKMS != nil {
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data, err = config.DecryptBytes(GlobalKMS, data, kms.Context{
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minioMetaBucket: path.Join(minioMetaBucket, itemPath),
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})
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if err != nil {
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// This fallback is needed because of a bug, in kms.Context{}
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// construction during migration.
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data, err = config.DecryptBytes(GlobalKMS, data, kms.Context{
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minioMetaBucket: itemPath,
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})
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if err != nil {
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return err
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}
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}
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}
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var json = jsoniter.ConfigCompatibleWithStandardLibrary
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return json.Unmarshal(data, item)
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}
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func (ies *IAMEtcdStore) loadIAMConfig(ctx context.Context, item interface{}, path string) error {
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data, err := readKeyEtcd(ctx, ies.client, path)
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if err != nil {
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return err
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}
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return getIAMConfig(item, data, path)
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}
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func (ies *IAMEtcdStore) deleteIAMConfig(ctx context.Context, path string) error {
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return deleteKeyEtcd(ctx, ies.client, path)
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}
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func (ies *IAMEtcdStore) migrateUsersConfigToV1(ctx context.Context) error {
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basePrefix := iamConfigUsersPrefix
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ctx, cancel := context.WithTimeout(ctx, defaultContextTimeout)
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defer cancel()
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r, err := ies.client.Get(ctx, basePrefix, etcd.WithPrefix(), etcd.WithKeysOnly())
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if err != nil {
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return err
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}
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users := etcdKvsToSet(basePrefix, r.Kvs)
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for _, user := range users.ToSlice() {
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{
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// 1. check if there is a policy file in the old loc.
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oldPolicyPath := pathJoin(basePrefix, user, iamPolicyFile)
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var policyName string
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err := ies.loadIAMConfig(ctx, &policyName, oldPolicyPath)
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if err != nil {
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switch err {
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case errConfigNotFound:
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// No mapped policy or already migrated.
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default:
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// corrupt data/read error, etc
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}
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goto next
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}
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// 2. copy policy to new loc.
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mp := newMappedPolicy(policyName)
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userType := regUser
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path := getMappedPolicyPath(user, userType, false)
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if err := ies.saveIAMConfig(ctx, mp, path); err != nil {
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return err
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}
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// 3. delete policy file in old loc.
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deleteKeyEtcd(ctx, ies.client, oldPolicyPath)
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}
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next:
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// 4. check if user identity has old format.
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identityPath := pathJoin(basePrefix, user, iamIdentityFile)
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var cred auth.Credentials
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if err := ies.loadIAMConfig(ctx, &cred, identityPath); err != nil {
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switch err {
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case errConfigNotFound:
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// This case should not happen.
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default:
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// corrupt file or read error
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}
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continue
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}
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// If the file is already in the new format,
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// then the parsed auth.Credentials will have
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// the zero value for the struct.
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var zeroCred auth.Credentials
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if cred.Equal(zeroCred) {
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// nothing to do
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continue
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}
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// Found a id file in old format. Copy value
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// into new format and save it.
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cred.AccessKey = user
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u := newUserIdentity(cred)
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if err := ies.saveIAMConfig(ctx, u, identityPath); err != nil {
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logger.LogIf(ctx, err)
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return err
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}
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// Nothing to delete as identity file location
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// has not changed.
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}
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return nil
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}
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func (ies *IAMEtcdStore) migrateToV1(ctx context.Context) error {
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var iamFmt iamFormat
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path := getIAMFormatFilePath()
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if err := ies.loadIAMConfig(ctx, &iamFmt, path); err != nil {
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switch err {
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case errConfigNotFound:
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// Need to migrate to V1.
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default:
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// if IAM format
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return err
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}
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}
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if iamFmt.Version >= iamFormatVersion1 {
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// Nothing to do.
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return nil
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}
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if err := ies.migrateUsersConfigToV1(ctx); err != nil {
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logger.LogIf(ctx, err)
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return err
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}
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// Save iam format to version 1.
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if err := ies.saveIAMConfig(ctx, newIAMFormatVersion1(), path); err != nil {
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logger.LogIf(ctx, err)
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return err
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}
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return nil
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}
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// Should be called under config migration lock
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func (ies *IAMEtcdStore) migrateBackendFormat(ctx context.Context) error {
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return ies.migrateToV1(ctx)
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}
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func (ies *IAMEtcdStore) loadPolicyDoc(ctx context.Context, policy string, m map[string]iampolicy.Policy) error {
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var p iampolicy.Policy
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err := ies.loadIAMConfig(ctx, &p, getPolicyDocPath(policy))
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if err != nil {
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if err == errConfigNotFound {
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return errNoSuchPolicy
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}
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return err
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}
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m[policy] = p
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return nil
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}
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func (ies *IAMEtcdStore) getPolicyDoc(ctx context.Context, kvs *mvccpb.KeyValue, m map[string]iampolicy.Policy) error {
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var p iampolicy.Policy
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err := getIAMConfig(&p, kvs.Value, string(kvs.Key))
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if err != nil {
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if err == errConfigNotFound {
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return errNoSuchPolicy
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}
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return err
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}
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policy := extractPathPrefixAndSuffix(string(kvs.Key), iamConfigPoliciesPrefix, path.Base(string(kvs.Key)))
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m[policy] = p
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return nil
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}
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func (ies *IAMEtcdStore) loadPolicyDocs(ctx context.Context, m map[string]iampolicy.Policy) error {
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ctx, cancel := context.WithTimeout(ctx, defaultContextTimeout)
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defer cancel()
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// Retrieve all keys and values to avoid too many calls to etcd in case of
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// a large number of policies
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r, err := ies.client.Get(ctx, iamConfigPoliciesPrefix, etcd.WithPrefix())
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if err != nil {
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return err
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}
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// Parse all values to construct the policies data model.
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for _, kvs := range r.Kvs {
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if err = ies.getPolicyDoc(ctx, kvs, m); err != nil && err != errNoSuchPolicy {
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return err
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}
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}
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return nil
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}
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func (ies *IAMEtcdStore) getUser(ctx context.Context, userkv *mvccpb.KeyValue, userType IAMUserType, m map[string]auth.Credentials, basePrefix string) error {
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var u UserIdentity
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err := getIAMConfig(&u, userkv.Value, string(userkv.Key))
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if err != nil {
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if err == errConfigNotFound {
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return errNoSuchUser
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}
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return err
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}
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user := extractPathPrefixAndSuffix(string(userkv.Key), basePrefix, path.Base(string(userkv.Key)))
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return ies.addUser(ctx, user, userType, u, m)
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}
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func (ies *IAMEtcdStore) addUser(ctx context.Context, user string, userType IAMUserType, u UserIdentity, m map[string]auth.Credentials) error {
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if u.Credentials.IsExpired() {
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// Delete expired identity.
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deleteKeyEtcd(ctx, ies.client, getUserIdentityPath(user, userType))
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deleteKeyEtcd(ctx, ies.client, getMappedPolicyPath(user, userType, false))
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return nil
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}
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if u.Credentials.AccessKey == "" {
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u.Credentials.AccessKey = user
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}
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m[user] = u.Credentials
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return nil
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}
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func (ies *IAMEtcdStore) loadUser(ctx context.Context, user string, userType IAMUserType, m map[string]auth.Credentials) error {
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var u UserIdentity
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err := ies.loadIAMConfig(ctx, &u, getUserIdentityPath(user, userType))
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if err != nil {
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if err == errConfigNotFound {
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return errNoSuchUser
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}
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return err
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}
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return ies.addUser(ctx, user, userType, u, m)
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}
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func (ies *IAMEtcdStore) loadUsers(ctx context.Context, userType IAMUserType, m map[string]auth.Credentials) error {
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var basePrefix string
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switch userType {
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case svcUser:
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basePrefix = iamConfigServiceAccountsPrefix
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case stsUser:
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basePrefix = iamConfigSTSPrefix
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default:
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basePrefix = iamConfigUsersPrefix
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}
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cctx, cancel := context.WithTimeout(ctx, defaultContextTimeout)
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defer cancel()
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// Retrieve all keys and values to avoid too many calls to etcd in case of
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// a large number of users
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r, err := ies.client.Get(cctx, basePrefix, etcd.WithPrefix())
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if err != nil {
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return err
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}
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// Parse all users values to create the proper data model
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for _, userKv := range r.Kvs {
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if err = ies.getUser(ctx, userKv, userType, m, basePrefix); err != nil && err != errNoSuchUser {
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return err
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}
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}
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return nil
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}
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func (ies *IAMEtcdStore) loadGroup(ctx context.Context, group string, m map[string]GroupInfo) error {
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var gi GroupInfo
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err := ies.loadIAMConfig(ctx, &gi, getGroupInfoPath(group))
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if err != nil {
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if err == errConfigNotFound {
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return errNoSuchGroup
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}
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return err
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}
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m[group] = gi
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return nil
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}
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func (ies *IAMEtcdStore) loadGroups(ctx context.Context, m map[string]GroupInfo) error {
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cctx, cancel := context.WithTimeout(ctx, defaultContextTimeout)
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defer cancel()
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r, err := ies.client.Get(cctx, iamConfigGroupsPrefix, etcd.WithPrefix(), etcd.WithKeysOnly())
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if err != nil {
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return err
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}
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groups := etcdKvsToSet(iamConfigGroupsPrefix, r.Kvs)
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// Reload config for all groups.
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for _, group := range groups.ToSlice() {
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if err = ies.loadGroup(ctx, group, m); err != nil && err != errNoSuchGroup {
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return err
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}
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}
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return nil
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}
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func (ies *IAMEtcdStore) loadMappedPolicy(ctx context.Context, name string, userType IAMUserType, isGroup bool, m map[string]MappedPolicy) error {
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var p MappedPolicy
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err := ies.loadIAMConfig(ctx, &p, getMappedPolicyPath(name, userType, isGroup))
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if err != nil {
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if err == errConfigNotFound {
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return errNoSuchPolicy
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}
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return err
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}
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m[name] = p
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return nil
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}
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func getMappedPolicy(ctx context.Context, kv *mvccpb.KeyValue, userType IAMUserType, isGroup bool, m map[string]MappedPolicy, basePrefix string) error {
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var p MappedPolicy
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err := getIAMConfig(&p, kv.Value, string(kv.Key))
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if err != nil {
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if err == errConfigNotFound {
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return errNoSuchPolicy
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}
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return err
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}
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name := extractPathPrefixAndSuffix(string(kv.Key), basePrefix, ".json")
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m[name] = p
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return nil
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}
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func (ies *IAMEtcdStore) loadMappedPolicies(ctx context.Context, userType IAMUserType, isGroup bool, m map[string]MappedPolicy) error {
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cctx, cancel := context.WithTimeout(ctx, defaultContextTimeout)
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defer cancel()
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var basePrefix string
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if isGroup {
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basePrefix = iamConfigPolicyDBGroupsPrefix
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} else {
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switch userType {
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case svcUser:
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basePrefix = iamConfigPolicyDBServiceAccountsPrefix
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case stsUser:
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basePrefix = iamConfigPolicyDBSTSUsersPrefix
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default:
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basePrefix = iamConfigPolicyDBUsersPrefix
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}
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}
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// Retrieve all keys and values to avoid too many calls to etcd in case of
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// a large number of policy mappings
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r, err := ies.client.Get(cctx, basePrefix, etcd.WithPrefix())
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if err != nil {
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return err
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}
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// Parse all policies mapping to create the proper data model
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for _, kv := range r.Kvs {
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if err = getMappedPolicy(ctx, kv, userType, isGroup, m, basePrefix); err != nil && err != errNoSuchPolicy {
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return err
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}
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}
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return nil
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}
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func (ies *IAMEtcdStore) savePolicyDoc(ctx context.Context, policyName string, p iampolicy.Policy) error {
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return ies.saveIAMConfig(ctx, &p, getPolicyDocPath(policyName))
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}
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func (ies *IAMEtcdStore) saveMappedPolicy(ctx context.Context, name string, userType IAMUserType, isGroup bool, mp MappedPolicy, opts ...options) error {
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return ies.saveIAMConfig(ctx, mp, getMappedPolicyPath(name, userType, isGroup), opts...)
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}
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func (ies *IAMEtcdStore) saveUserIdentity(ctx context.Context, name string, userType IAMUserType, u UserIdentity, opts ...options) error {
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return ies.saveIAMConfig(ctx, u, getUserIdentityPath(name, userType), opts...)
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}
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func (ies *IAMEtcdStore) saveGroupInfo(ctx context.Context, name string, gi GroupInfo) error {
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return ies.saveIAMConfig(ctx, gi, getGroupInfoPath(name))
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}
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func (ies *IAMEtcdStore) deletePolicyDoc(ctx context.Context, name string) error {
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err := ies.deleteIAMConfig(ctx, getPolicyDocPath(name))
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if err == errConfigNotFound {
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err = errNoSuchPolicy
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}
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return err
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}
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func (ies *IAMEtcdStore) deleteMappedPolicy(ctx context.Context, name string, userType IAMUserType, isGroup bool) error {
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err := ies.deleteIAMConfig(ctx, getMappedPolicyPath(name, userType, isGroup))
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if err == errConfigNotFound {
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err = errNoSuchPolicy
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}
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return err
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}
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func (ies *IAMEtcdStore) deleteUserIdentity(ctx context.Context, name string, userType IAMUserType) error {
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err := ies.deleteIAMConfig(ctx, getUserIdentityPath(name, userType))
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if err == errConfigNotFound {
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err = errNoSuchUser
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}
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return err
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}
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func (ies *IAMEtcdStore) deleteGroupInfo(ctx context.Context, name string) error {
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err := ies.deleteIAMConfig(ctx, getGroupInfoPath(name))
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if err == errConfigNotFound {
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err = errNoSuchGroup
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}
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return err
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}
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func (ies *IAMEtcdStore) watch(ctx context.Context, keyPath string) <-chan iamWatchEvent {
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ch := make(chan iamWatchEvent)
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// go routine to read events from the etcd watch channel and send them
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// down `ch`
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go func() {
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|
for {
|
|
outerLoop:
|
|
watchCh := ies.client.Watch(ctx,
|
|
keyPath, etcd.WithPrefix(), etcd.WithKeysOnly())
|
|
|
|
for {
|
|
select {
|
|
case <-ctx.Done():
|
|
return
|
|
case watchResp, ok := <-watchCh:
|
|
if !ok {
|
|
time.Sleep(1 * time.Second)
|
|
// Upon an error on watch channel
|
|
// re-init the watch channel.
|
|
goto outerLoop
|
|
}
|
|
if err := watchResp.Err(); err != nil {
|
|
logger.LogIf(ctx, err)
|
|
// log and retry.
|
|
time.Sleep(1 * time.Second)
|
|
// Upon an error on watch channel
|
|
// re-init the watch channel.
|
|
goto outerLoop
|
|
}
|
|
for _, event := range watchResp.Events {
|
|
isCreateEvent := event.IsModify() || event.IsCreate()
|
|
isDeleteEvent := event.Type == etcd.EventTypeDelete
|
|
|
|
switch {
|
|
case isCreateEvent:
|
|
ch <- iamWatchEvent{
|
|
isCreated: true,
|
|
keyPath: string(event.Kv.Key),
|
|
}
|
|
case isDeleteEvent:
|
|
ch <- iamWatchEvent{
|
|
isCreated: false,
|
|
keyPath: string(event.Kv.Key),
|
|
}
|
|
}
|
|
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}()
|
|
return ch
|
|
|
|
}
|