Add Validate() to serverConfig to call it at server startup and in Admin SetConfig handler to minimize errors scenario after server restart.
117 lines
3.1 KiB
Go
117 lines
3.1 KiB
Go
/*
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* Minio Cloud Storage, (C) 2018 Minio, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package cmd
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import (
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"encoding/json"
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"errors"
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"path/filepath"
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"strings"
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"github.com/minio/minio/pkg/ellipses"
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)
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// CacheConfig represents cache config settings
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type CacheConfig struct {
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Drives []string `json:"drives"`
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Expiry int `json:"expiry"`
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MaxUse int `json:"maxuse"`
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Exclude []string `json:"exclude"`
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}
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// UnmarshalJSON - implements JSON unmarshal interface for unmarshalling
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// json entries for CacheConfig.
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func (cfg *CacheConfig) UnmarshalJSON(data []byte) (err error) {
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type Alias CacheConfig
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var _cfg = &struct {
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*Alias
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}{
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Alias: (*Alias)(cfg),
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}
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if err = json.Unmarshal(data, _cfg); err != nil {
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return err
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}
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if _cfg.Expiry < 0 {
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return errors.New("config expiry value should not be negative")
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}
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if _cfg.MaxUse < 0 {
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return errors.New("config max use value should not be null or negative")
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}
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if _, err = parseCacheDrives(_cfg.Drives); err != nil {
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return err
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}
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if _, err = parseCacheExcludes(_cfg.Exclude); err != nil {
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return err
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}
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return nil
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}
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// Parses given cacheDrivesEnv and returns a list of cache drives.
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func parseCacheDrives(drives []string) ([]string, error) {
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if len(drives) == 0 {
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return drives, nil
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}
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var endpoints []string
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for _, d := range drives {
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if ellipses.HasEllipses(d) {
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s, err := parseCacheDrivePaths(d)
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if err != nil {
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return nil, err
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}
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endpoints = append(endpoints, s...)
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} else {
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endpoints = append(endpoints, d)
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}
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}
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for _, d := range endpoints {
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if !filepath.IsAbs(d) {
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return nil, uiErrInvalidCacheDrivesValue(nil).Msg("cache dir should be absolute path: %s", d)
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}
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}
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return endpoints, nil
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}
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// Parses all arguments and returns a slice of drive paths following the ellipses pattern.
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func parseCacheDrivePaths(arg string) (ep []string, err error) {
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patterns, perr := ellipses.FindEllipsesPatterns(arg)
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if perr != nil {
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return []string{}, uiErrInvalidCacheDrivesValue(nil).Msg(perr.Error())
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}
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for _, lbls := range patterns.Expand() {
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ep = append(ep, strings.Join(lbls, ""))
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}
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return ep, nil
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}
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// Parses given cacheExcludesEnv and returns a list of cache exclude patterns.
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func parseCacheExcludes(excludes []string) ([]string, error) {
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for _, e := range excludes {
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if len(e) == 0 {
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return nil, uiErrInvalidCacheExcludesValue(nil).Msg("cache exclude path (%s) cannot be empty", e)
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}
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if hasPrefix(e, slashSeparator) {
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return nil, uiErrInvalidCacheExcludesValue(nil).Msg("cache exclude pattern (%s) cannot start with / as prefix", e)
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}
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}
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return excludes, nil
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}
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