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/*
* Minio Cloud Storage, (C) 2016, 2017, 2018 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 (
"errors"
"fmt"
"io/ioutil"
"reflect"
"sync"
"github.com/minio/minio/pkg/auth"
"github.com/minio/minio/pkg/event"
"github.com/minio/minio/pkg/event/target"
"github.com/minio/minio/pkg/quick"
"github.com/tidwall/gjson"
)
// Steps to move from version N to version N+1
// 1. Add new struct serverConfigVN+1 in config-versions.go
// 2. Set serverConfigVersion to "N+1"
// 3. Set serverConfig to serverConfigVN+1
// 4. Add new migration function (ex. func migrateVNToVN+1()) in config-migrate.go
// 5. Call migrateVNToVN+1() from migrateConfig() in config-migrate.go
// 6. Make changes in config-current_test.go for any test change
// Config version
const serverConfigVersion = "22"
type serverConfig = serverConfigV22
var (
// globalServerConfig server config.
globalServerConfig *serverConfig
globalServerConfigMu sync.RWMutex
)
// GetVersion get current config version.
func (s *serverConfig) GetVersion() string {
return s.Version
}
// SetRegion set a new region.
func (s *serverConfig) SetRegion(region string) {
// Save new region.
s.Region = region
}
// GetRegion get current region.
func (s *serverConfig) GetRegion() string {
return s.Region
}
// SetCredential sets new credential and returns the previous credential.
func (s *serverConfig) SetCredential(creds auth.Credentials) (prevCred auth.Credentials) {
// Save previous credential.
prevCred = s.Credential
// Set updated credential.
s.Credential = creds
// Return previous credential.
return prevCred
}
// GetCredentials get current credentials.
func (s *serverConfig) GetCredential() auth.Credentials {
return s.Credential
}
// SetBrowser set if browser is enabled.
func (s *serverConfig) SetBrowser(b bool) {
// Set the new value.
s.Browser = BrowserFlag(b)
}
func (s *serverConfig) SetStorageClass(standardClass, rrsClass storageClass) {
s.StorageClass.Standard = standardClass
s.StorageClass.RRS = rrsClass
}
// GetStorageClass reads storage class fields from current config.
// It returns the standard and reduced redundancy storage class struct
func (s *serverConfig) GetStorageClass() (storageClass, storageClass) {
return s.StorageClass.Standard, s.StorageClass.RRS
}
// GetCredentials get current credentials.
func (s *serverConfig) GetBrowser() bool {
return bool(s.Browser)
}
// Save config.
func (s *serverConfig) Save() error {
// Save config file.
return quick.Save(getConfigFile(), s)
}
// Returns the string describing a difference with the given
// configuration object. If the given configuration object is
// identical, an empty string is returned.
func (s *serverConfig) ConfigDiff(t *serverConfig) string {
switch {
case t == nil:
return "Given configuration is empty"
case s.Credential != t.Credential:
return "Credential configuration differs"
case s.Region != t.Region:
return "Region configuration differs"
case s.Browser != t.Browser:
return "Browser configuration differs"
case s.Domain != t.Domain:
return "Domain configuration differs"
case s.StorageClass != t.StorageClass:
return "StorageClass configuration differs"
case !reflect.DeepEqual(s.Notify.AMQP, t.Notify.AMQP):
return "AMQP Notification configuration differs"
case !reflect.DeepEqual(s.Notify.NATS, t.Notify.NATS):
return "NATS Notification configuration differs"
case !reflect.DeepEqual(s.Notify.Elasticsearch, t.Notify.Elasticsearch):
return "ElasticSearch Notification configuration differs"
case !reflect.DeepEqual(s.Notify.Redis, t.Notify.Redis):
return "Redis Notification configuration differs"
case !reflect.DeepEqual(s.Notify.PostgreSQL, t.Notify.PostgreSQL):
return "PostgreSQL Notification configuration differs"
case !reflect.DeepEqual(s.Notify.Kafka, t.Notify.Kafka):
return "Kafka Notification configuration differs"
case !reflect.DeepEqual(s.Notify.Webhook, t.Notify.Webhook):
return "Webhook Notification configuration differs"
case !reflect.DeepEqual(s.Notify.MySQL, t.Notify.MySQL):
return "MySQL Notification configuration differs"
case !reflect.DeepEqual(s.Notify.MQTT, t.Notify.MQTT):
return "MQTT Notification configuration differs"
case reflect.DeepEqual(s, t):
return ""
default:
// This case will not happen unless this comparison
// function has become stale.
return "Configuration differs"
}
}
func newServerConfig() *serverConfig {
srvCfg := &serverConfig{
Version: serverConfigVersion,
Credential: auth.MustGetNewCredentials(),
Region: globalMinioDefaultRegion,
Browser: true,
StorageClass: storageClassConfig{
Standard: storageClass{},
RRS: storageClass{},
},
Notify: notifier{},
}
// Make sure to initialize notification configs.
srvCfg.Notify.AMQP = make(map[string]target.AMQPArgs)
srvCfg.Notify.AMQP["1"] = target.AMQPArgs{}
srvCfg.Notify.MQTT = make(map[string]target.MQTTArgs)
srvCfg.Notify.MQTT["1"] = target.MQTTArgs{}
srvCfg.Notify.Elasticsearch = make(map[string]target.ElasticsearchArgs)
srvCfg.Notify.Elasticsearch["1"] = target.ElasticsearchArgs{}
srvCfg.Notify.Redis = make(map[string]target.RedisArgs)
srvCfg.Notify.Redis["1"] = target.RedisArgs{}
srvCfg.Notify.NATS = make(map[string]target.NATSArgs)
srvCfg.Notify.NATS["1"] = target.NATSArgs{}
srvCfg.Notify.PostgreSQL = make(map[string]target.PostgreSQLArgs)
srvCfg.Notify.PostgreSQL["1"] = target.PostgreSQLArgs{}
srvCfg.Notify.MySQL = make(map[string]target.MySQLArgs)
srvCfg.Notify.MySQL["1"] = target.MySQLArgs{}
srvCfg.Notify.Kafka = make(map[string]target.KafkaArgs)
srvCfg.Notify.Kafka["1"] = target.KafkaArgs{}
srvCfg.Notify.Webhook = make(map[string]target.WebhookArgs)
srvCfg.Notify.Webhook["1"] = target.WebhookArgs{}
return srvCfg
}
// newConfig - initialize a new server config, saves env parameters if
// found, otherwise use default parameters
func newConfig() error {
// Initialize server config.
srvCfg := newServerConfig()
// If env is set override the credentials from config file.
if globalIsEnvCreds {
srvCfg.SetCredential(globalActiveCred)
}
if globalIsEnvBrowser {
srvCfg.SetBrowser(globalIsBrowserEnabled)
}
if globalIsEnvRegion {
srvCfg.SetRegion(globalServerRegion)
}
if globalIsEnvDomainName {
srvCfg.Domain = globalDomainName
}
if globalIsStorageClass {
srvCfg.SetStorageClass(globalStandardStorageClass, globalRRStorageClass)
}
// hold the mutex lock before a new config is assigned.
// Save the new config globally.
// unlock the mutex.
globalServerConfigMu.Lock()
globalServerConfig = srvCfg
globalServerConfigMu.Unlock()
// Save config into file.
return globalServerConfig.Save()
}
// doCheckDupJSONKeys recursively detects duplicate json keys
func doCheckDupJSONKeys(key, value gjson.Result) error {
// Key occurrences map of the current scope to count
// if there is any duplicated json key.
keysOcc := make(map[string]int)
// Holds the found error
var checkErr error
// Iterate over keys in the current json scope
value.ForEach(func(k, v gjson.Result) bool {
// If current key is not null, check if its
// value contains some duplicated keys.
if k.Type != gjson.Null {
keysOcc[k.String()]++
checkErr = doCheckDupJSONKeys(k, v)
}
return checkErr == nil
})
// Check found err
if checkErr != nil {
return errors.New(key.String() + " => " + checkErr.Error())
}
// Check for duplicated keys
for k, v := range keysOcc {
if v > 1 {
return errors.New(key.String() + " => `" + k + "` entry is duplicated")
}
}
return nil
}
// Check recursively if a key is duplicated in the same json scope
// e.g.:
// `{ "key" : { "key" ..` is accepted
// `{ "key" : { "subkey" : "val1", "subkey": "val2" ..` throws subkey duplicated error
func checkDupJSONKeys(json string) error {
// Parse config with gjson library
config := gjson.Parse(json)
// Create a fake rootKey since root json doesn't seem to have representation
// in gjson library.
rootKey := gjson.Result{Type: gjson.String, Str: minioConfigFile}
// Check if loaded json contains any duplicated keys
return doCheckDupJSONKeys(rootKey, config)
}
// getValidConfig - returns valid server configuration
func getValidConfig() (*serverConfig, error) {
srvCfg := &serverConfig{
Region: globalMinioDefaultRegion,
Browser: true,
}
configFile := getConfigFile()
if _, err := quick.Load(configFile, srvCfg); err != nil {
return nil, err
}
if srvCfg.Version != serverConfigVersion {
return nil, fmt.Errorf("configuration version mismatch. Expected: ‘%s’, Got: ‘%s’", serverConfigVersion, srvCfg.Version)
}
// Load config file json and check for duplication json keys
jsonBytes, err := ioutil.ReadFile(configFile)
if err != nil {
return nil, err
}
if err = checkDupJSONKeys(string(jsonBytes)); err != nil {
return nil, err
}
// Validate credential fields only when
// they are not set via the environment
// Error out if global is env credential is not set and config has invalid credential
if !globalIsEnvCreds && !srvCfg.Credential.IsValid() {
return nil, errors.New("invalid credential in config file " + configFile)
}
return srvCfg, nil
}
// loadConfig - loads a new config from disk, overrides params from env
// if found and valid
func loadConfig() error {
srvCfg, err := getValidConfig()
if err != nil {
return err
}
// If env is set override the credentials from config file.
if globalIsEnvCreds {
srvCfg.SetCredential(globalActiveCred)
}
if globalIsEnvBrowser {
srvCfg.SetBrowser(globalIsBrowserEnabled)
}
if globalIsEnvRegion {
srvCfg.SetRegion(globalServerRegion)
}
if globalIsEnvDomainName {
srvCfg.Domain = globalDomainName
}
if globalIsStorageClass {
srvCfg.SetStorageClass(globalStandardStorageClass, globalRRStorageClass)
}
// hold the mutex lock before a new config is assigned.
globalServerConfigMu.Lock()
globalServerConfig = srvCfg
if !globalIsEnvCreds {
globalActiveCred = globalServerConfig.GetCredential()
}
if !globalIsEnvBrowser {
globalIsBrowserEnabled = globalServerConfig.GetBrowser()
}
if !globalIsEnvRegion {
globalServerRegion = globalServerConfig.GetRegion()
}
if !globalIsEnvDomainName {
globalDomainName = globalServerConfig.Domain
}
if !globalIsStorageClass {
globalStandardStorageClass, globalRRStorageClass = globalServerConfig.GetStorageClass()
}
globalServerConfigMu.Unlock()
return nil
}
// getNotificationTargets - returns TargetList which contains enabled targets in serverConfig.
// A new notification target is added like below
// * Add a new target in pkg/event/target package.
// * Add newly added target configuration to serverConfig.Notify.<TARGET_NAME>.
// * Handle the configuration in this function to create/add into TargetList.
func getNotificationTargets(config *serverConfig) (*event.TargetList, error) {
targetList := event.NewTargetList()
for id, args := range config.Notify.AMQP {
if args.Enable {
newTarget, err := target.NewAMQPTarget(id, args)
if err != nil {
return nil, err
}
if err = targetList.Add(newTarget); err != nil {
return nil, err
}
}
}
for id, args := range config.Notify.Elasticsearch {
if args.Enable {
newTarget, err := target.NewElasticsearchTarget(id, args)
if err != nil {
return nil, err
}
if err = targetList.Add(newTarget); err != nil {
return nil, err
}
}
}
for id, args := range config.Notify.Kafka {
if args.Enable {
newTarget, err := target.NewKafkaTarget(id, args)
if err != nil {
return nil, err
}
if err = targetList.Add(newTarget); err != nil {
return nil, err
}
}
}
for id, args := range config.Notify.MQTT {
if args.Enable {
newTarget, err := target.NewMQTTTarget(id, args)
if err != nil {
return nil, err
}
if err = targetList.Add(newTarget); err != nil {
return nil, err
}
}
}
for id, args := range config.Notify.MySQL {
if args.Enable {
newTarget, err := target.NewMySQLTarget(id, args)
if err != nil {
return nil, err
}
if err = targetList.Add(newTarget); err != nil {
return nil, err
}
}
}
for id, args := range config.Notify.NATS {
if args.Enable {
newTarget, err := target.NewNATSTarget(id, args)
if err != nil {
return nil, err
}
if err = targetList.Add(newTarget); err != nil {
return nil, err
}
}
}
for id, args := range config.Notify.PostgreSQL {
if args.Enable {
newTarget, err := target.NewPostgreSQLTarget(id, args)
if err != nil {
return nil, err
}
if err = targetList.Add(newTarget); err != nil {
return nil, err
}
}
}
for id, args := range config.Notify.Redis {
if args.Enable {
newTarget, err := target.NewRedisTarget(id, args)
if err != nil {
return nil, err
}
if err = targetList.Add(newTarget); err != nil {
return nil, err
}
}
}
for id, args := range config.Notify.Webhook {
if args.Enable {
newTarget := target.NewWebhookTarget(id, args)
if err := targetList.Add(newTarget); err != nil {
return nil, err
}
}
}
return targetList, nil
}