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/*
* MinIO Cloud Storage, (C) 2020 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 api
import (
"encoding/json"
"errors"
"strconv"
"strings"
"time"
"github.com/minio/minio/cmd/config"
"github.com/minio/minio/pkg/env"
)
// API sub-system constants
const (
apiRequestsMax = "requests_max"
apiRequestsDeadline = "requests_deadline"
apiClusterDeadline = "cluster_deadline"
apiCorsAllowOrigin = "cors_allow_origin"
apiRemoteTransportDeadline = "remote_transport_deadline"
apiListQuorum = "list_quorum"
apiExtendListCacheLife = "extend_list_cache_life"
EnvAPIRequestsMax = "MINIO_API_REQUESTS_MAX"
EnvAPIRequestsDeadline = "MINIO_API_REQUESTS_DEADLINE"
EnvAPIClusterDeadline = "MINIO_API_CLUSTER_DEADLINE"
EnvAPICorsAllowOrigin = "MINIO_API_CORS_ALLOW_ORIGIN"
EnvAPIRemoteTransportDeadline = "MINIO_API_REMOTE_TRANSPORT_DEADLINE"
EnvAPIListQuorum = "MINIO_API_LIST_QUORUM"
EnvAPIExtendListCacheLife = "MINIO_API_EXTEND_LIST_CACHE_LIFE"
EnvAPISecureCiphers = "MINIO_API_SECURE_CIPHERS"
)
// Deprecated key and ENVs
const (
apiReadyDeadline = "ready_deadline"
EnvAPIReadyDeadline = "MINIO_API_READY_DEADLINE"
)
// DefaultKVS - default storage class config
var (
DefaultKVS = config.KVS{
config.KV{
Key: apiRequestsMax,
Value: "0",
},
config.KV{
Key: apiRequestsDeadline,
Value: "10s",
},
config.KV{
Key: apiClusterDeadline,
Value: "10s",
},
config.KV{
Key: apiCorsAllowOrigin,
Value: "*",
},
config.KV{
Key: apiRemoteTransportDeadline,
Value: "2h",
},
config.KV{
Key: apiListQuorum,
Value: "optimal",
},
config.KV{
Key: apiExtendListCacheLife,
Value: "0s",
},
}
)
// Config storage class configuration
type Config struct {
RequestsMax int `json:"requests_max"`
RequestsDeadline time.Duration `json:"requests_deadline"`
ClusterDeadline time.Duration `json:"cluster_deadline"`
CorsAllowOrigin []string `json:"cors_allow_origin"`
RemoteTransportDeadline time.Duration `json:"remote_transport_deadline"`
ListQuorum string `json:"list_strict_quorum"`
ExtendListLife time.Duration `json:"extend_list_cache_life"`
}
// UnmarshalJSON - Validate SS and RRS parity when unmarshalling JSON.
func (sCfg *Config) UnmarshalJSON(data []byte) error {
type Alias Config
aux := &struct {
*Alias
}{
Alias: (*Alias)(sCfg),
}
return json.Unmarshal(data, &aux)
}
// GetListQuorum interprets list quorum values and returns appropriate
// acceptable quorum expected for list operations
func (sCfg Config) GetListQuorum() int {
switch sCfg.ListQuorum {
case "optimal":
return 3
case "reduced":
return 2
case "disk":
// smallest possible value, generally meant for testing.
return 1
case "strict":
return -1
}
// Defaults to 3 drives per set.
return 3
}
// LookupConfig - lookup api config and override with valid environment settings if any.
func LookupConfig(kvs config.KVS) (cfg Config, err error) {
// remove this since we have removed this already.
kvs.Delete(apiReadyDeadline)
if err = config.CheckValidKeys(config.APISubSys, kvs, DefaultKVS); err != nil {
return cfg, err
}
// Check environment variables parameters
requestsMax, err := strconv.Atoi(env.Get(EnvAPIRequestsMax, kvs.Get(apiRequestsMax)))
if err != nil {
return cfg, err
}
if requestsMax < 0 {
return cfg, errors.New("invalid API max requests value")
}
requestsDeadline, err := time.ParseDuration(env.Get(EnvAPIRequestsDeadline, kvs.Get(apiRequestsDeadline)))
if err != nil {
return cfg, err
}
clusterDeadline, err := time.ParseDuration(env.Get(EnvAPIClusterDeadline, kvs.Get(apiClusterDeadline)))
if err != nil {
return cfg, err
}
corsAllowOrigin := strings.Split(env.Get(EnvAPICorsAllowOrigin, kvs.Get(apiCorsAllowOrigin)), ",")
remoteTransportDeadline, err := time.ParseDuration(env.Get(EnvAPIRemoteTransportDeadline, kvs.Get(apiRemoteTransportDeadline)))
if err != nil {
return cfg, err
}
listQuorum := env.Get(EnvAPIListQuorum, kvs.Get(apiListQuorum))
switch listQuorum {
case "strict", "optimal", "reduced", "disk":
default:
return cfg, errors.New("invalid value for list strict quorum")
}
listLife, err := time.ParseDuration(env.Get(EnvAPIExtendListCacheLife, kvs.Get(apiExtendListCacheLife)))
if err != nil {
return cfg, err
}
return Config{
RequestsMax: requestsMax,
RequestsDeadline: requestsDeadline,
ClusterDeadline: clusterDeadline,
CorsAllowOrigin: corsAllowOrigin,
RemoteTransportDeadline: remoteTransportDeadline,
ListQuorum: listQuorum,
ExtendListLife: listLife,
}, nil
}