mirror of https://github.com/tidwall/tile38.git
493 lines
11 KiB
Go
493 lines
11 KiB
Go
package server
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import (
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"encoding/json"
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"io/ioutil"
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"os"
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"strconv"
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"strings"
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"sync"
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"time"
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"github.com/tidwall/gjson"
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"github.com/tidwall/resp"
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"github.com/tidwall/tile38/internal/glob"
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)
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const (
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defaultKeepAlive = 300 // seconds
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defaultProtectedMode = "yes"
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)
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// Config keys
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const (
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FollowHost = "follow_host"
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FollowPort = "follow_port"
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FollowID = "follow_id"
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FollowPos = "follow_pos"
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ServerID = "server_id"
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ReadOnly = "read_only"
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RequirePass = "requirepass"
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LeaderAuth = "leaderauth"
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ProtectedMode = "protected-mode"
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MaxMemory = "maxmemory"
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AutoGC = "autogc"
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KeepAlive = "keepalive"
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LogConfig = "logconfig"
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)
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var validProperties = []string{RequirePass, LeaderAuth, ProtectedMode, MaxMemory, AutoGC, KeepAlive, LogConfig}
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// Config is a tile38 config
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type Config struct {
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path string
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mu sync.RWMutex
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_followHost string
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_followPort int64
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_followID string
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_followPos int64
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_serverID string
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_readOnly bool
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_requirePassP string
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_requirePass string
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_leaderAuthP string
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_leaderAuth string
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_protectedModeP string
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_protectedMode string
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_maxMemoryP string
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_maxMemory int64
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_autoGCP string
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_autoGC uint64
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_keepAliveP string
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_keepAlive int64
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_logConfigP interface{}
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_logConfig string
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}
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func loadConfig(path string) (*Config, error) {
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var json string
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data, err := ioutil.ReadFile(path)
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if err != nil {
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if os.IsNotExist(err) {
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json = `{"` + ServerID + `":"` + randomKey(16) + `"}`
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} else {
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return nil, err
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}
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} else {
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json = string(data)
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}
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config := &Config{
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path: path,
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_followHost: gjson.Get(json, FollowHost).String(),
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_followPort: gjson.Get(json, FollowPort).Int(),
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_followID: gjson.Get(json, FollowID).String(),
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_followPos: gjson.Get(json, FollowPos).Int(),
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_serverID: gjson.Get(json, ServerID).String(),
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_readOnly: gjson.Get(json, ReadOnly).Bool(),
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_requirePassP: gjson.Get(json, RequirePass).String(),
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_leaderAuthP: gjson.Get(json, LeaderAuth).String(),
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_protectedModeP: gjson.Get(json, ProtectedMode).String(),
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_maxMemoryP: gjson.Get(json, MaxMemory).String(),
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_autoGCP: gjson.Get(json, AutoGC).String(),
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_keepAliveP: gjson.Get(json, KeepAlive).String(),
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_logConfig: gjson.Get(json, LogConfig).String(),
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}
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// load properties
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if err := config.setProperty(RequirePass, config._requirePassP, true); err != nil {
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return nil, err
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}
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if err := config.setProperty(LeaderAuth, config._leaderAuthP, true); err != nil {
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return nil, err
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}
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if err := config.setProperty(ProtectedMode, config._protectedModeP, true); err != nil {
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return nil, err
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}
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if err := config.setProperty(MaxMemory, config._maxMemoryP, true); err != nil {
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return nil, err
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}
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if err := config.setProperty(AutoGC, config._autoGCP, true); err != nil {
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return nil, err
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}
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if err := config.setProperty(KeepAlive, config._keepAliveP, true); err != nil {
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return nil, err
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}
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if err := config.setProperty(LogConfig, config._logConfig, true); err != nil {
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return nil, err
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}
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config.write(false)
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return config, nil
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}
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func (config *Config) write(writeProperties bool) {
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config.mu.Lock()
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defer config.mu.Unlock()
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if writeProperties {
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// save properties
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config._requirePassP = config._requirePass
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config._leaderAuthP = config._leaderAuth
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if config._protectedMode == defaultProtectedMode {
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config._protectedModeP = ""
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} else {
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config._protectedModeP = config._protectedMode
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}
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config._maxMemoryP = formatMemSize(config._maxMemory)
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if config._autoGC == 0 {
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config._autoGCP = ""
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} else {
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config._autoGCP = strconv.FormatUint(config._autoGC, 10)
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}
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if config._keepAlive == defaultKeepAlive {
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config._keepAliveP = ""
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} else {
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config._keepAliveP = strconv.FormatUint(uint64(config._keepAlive), 10)
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}
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if config._logConfig != "" {
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config._logConfigP = config._logConfig
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}
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}
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m := make(map[string]interface{})
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if config._followHost != "" {
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m[FollowHost] = config._followHost
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}
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if config._followPort != 0 {
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m[FollowPort] = config._followPort
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}
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if config._followID != "" {
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m[FollowID] = config._followID
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}
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if config._followPos != 0 {
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m[FollowPos] = config._followPos
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}
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if config._serverID != "" {
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m[ServerID] = config._serverID
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}
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if config._readOnly {
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m[ReadOnly] = config._readOnly
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}
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if config._requirePassP != "" {
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m[RequirePass] = config._requirePassP
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}
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if config._leaderAuthP != "" {
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m[LeaderAuth] = config._leaderAuthP
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}
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if config._protectedModeP != "" {
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m[ProtectedMode] = config._protectedModeP
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}
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if config._maxMemoryP != "" {
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m[MaxMemory] = config._maxMemoryP
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}
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if config._autoGCP != "" {
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m[AutoGC] = config._autoGCP
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}
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if config._keepAliveP != "" {
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m[KeepAlive] = config._keepAliveP
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}
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if config._logConfigP != "" {
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var lcfg map[string]interface{}
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json.Unmarshal([]byte(config._logConfig), &lcfg)
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m[LogConfig] = lcfg
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}
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data, err := json.MarshalIndent(m, "", "\t")
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if err != nil {
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panic(err)
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}
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data = append(data, '\n')
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err = ioutil.WriteFile(config.path, data, 0600)
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if err != nil {
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panic(err)
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}
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}
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func parseMemSize(s string) (bytes int64, ok bool) {
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if s == "" {
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return 0, true
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}
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s = strings.ToLower(s)
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var n uint64
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var sz int64
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var err error
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if strings.HasSuffix(s, "gb") {
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n, err = strconv.ParseUint(s[:len(s)-2], 10, 64)
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sz = int64(n * 1024 * 1024 * 1024)
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} else if strings.HasSuffix(s, "mb") {
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n, err = strconv.ParseUint(s[:len(s)-2], 10, 64)
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sz = int64(n * 1024 * 1024)
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} else if strings.HasSuffix(s, "kb") {
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n, err = strconv.ParseUint(s[:len(s)-2], 10, 64)
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sz = int64(n * 1024)
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} else {
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n, err = strconv.ParseUint(s, 10, 64)
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sz = int64(n)
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}
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if err != nil {
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return 0, false
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}
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return sz, true
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}
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func formatMemSize(sz int64) string {
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if sz <= 0 {
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return ""
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}
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if sz < 1024 {
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return strconv.FormatInt(sz, 10)
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}
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sz /= 1024
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if sz < 1024 {
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return strconv.FormatInt(sz, 10) + "kb"
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}
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sz /= 1024
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if sz < 1024 {
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return strconv.FormatInt(sz, 10) + "mb"
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}
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sz /= 1024
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return strconv.FormatInt(sz, 10) + "gb"
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}
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func (config *Config) setProperty(name, value string, fromLoad bool) error {
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config.mu.Lock()
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defer config.mu.Unlock()
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var invalid bool
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switch name {
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default:
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return clientErrorf("Unsupported CONFIG parameter: %s", name)
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case RequirePass:
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config._requirePass = value
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case LeaderAuth:
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config._leaderAuth = value
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case AutoGC:
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if value == "" {
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config._autoGC = 0
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} else {
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gc, err := strconv.ParseUint(value, 10, 64)
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if err != nil {
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return err
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}
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config._autoGC = gc
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}
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case MaxMemory:
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sz, ok := parseMemSize(value)
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if !ok {
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return clientErrorf("Invalid argument '%s' for CONFIG SET '%s'", value, name)
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}
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config._maxMemory = sz
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case ProtectedMode:
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switch strings.ToLower(value) {
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case "":
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if fromLoad {
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config._protectedMode = defaultProtectedMode
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} else {
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invalid = true
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}
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case "yes", "no":
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config._protectedMode = strings.ToLower(value)
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default:
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invalid = true
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}
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case KeepAlive:
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if value == "" {
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config._keepAlive = defaultKeepAlive
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} else {
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keepalive, err := strconv.ParseUint(value, 10, 64)
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if err != nil {
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invalid = true
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} else {
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config._keepAlive = int64(keepalive)
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}
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}
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case LogConfig:
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if value == "" {
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config._logConfig = ""
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} else {
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config._logConfig = value
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}
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}
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if invalid {
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return clientErrorf("Invalid argument '%s' for CONFIG SET '%s'", value, name)
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}
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return nil
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}
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func (config *Config) getProperties(pattern string) map[string]interface{} {
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m := make(map[string]interface{})
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for _, name := range validProperties {
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matched, _ := glob.Match(pattern, name)
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if matched {
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m[name] = config.getProperty(name)
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}
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}
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return m
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}
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func (config *Config) getProperty(name string) string {
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config.mu.RLock()
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defer config.mu.RUnlock()
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switch name {
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default:
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return ""
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case AutoGC:
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return strconv.FormatUint(config._autoGC, 10)
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case RequirePass:
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return config._requirePass
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case LeaderAuth:
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return config._leaderAuth
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case ProtectedMode:
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return config._protectedMode
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case MaxMemory:
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return formatMemSize(config._maxMemory)
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case KeepAlive:
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return strconv.FormatUint(uint64(config._keepAlive), 10)
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case LogConfig:
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return config._logConfig
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}
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}
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func (s *Server) cmdConfigGet(msg *Message) (res resp.Value, err error) {
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start := time.Now()
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vs := msg.Args[1:]
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var ok bool
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var name string
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if vs, name, ok = tokenval(vs); !ok {
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return NOMessage, errInvalidNumberOfArguments
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}
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if len(vs) != 0 {
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return NOMessage, errInvalidNumberOfArguments
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}
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m := s.config.getProperties(name)
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switch msg.OutputType {
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case JSON:
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data, err := json.Marshal(m)
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if err != nil {
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return NOMessage, err
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}
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res = resp.StringValue(`{"ok":true,"properties":` + string(data) + `,"elapsed":"` + time.Since(start).String() + "\"}")
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case RESP:
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vals := respValuesSimpleMap(m)
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res = resp.ArrayValue(vals)
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}
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return
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}
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func (s *Server) cmdConfigSet(msg *Message) (res resp.Value, err error) {
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start := time.Now()
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vs := msg.Args[1:]
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var ok bool
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var name string
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if vs, name, ok = tokenval(vs); !ok {
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return NOMessage, errInvalidNumberOfArguments
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}
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var value string
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if vs, value, ok = tokenval(vs); !ok {
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if strings.ToLower(name) != RequirePass {
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return NOMessage, errInvalidNumberOfArguments
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}
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}
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if len(vs) != 0 {
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return NOMessage, errInvalidNumberOfArguments
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}
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if err := s.config.setProperty(name, value, false); err != nil {
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return NOMessage, err
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}
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return OKMessage(msg, start), nil
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}
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func (s *Server) cmdConfigRewrite(msg *Message) (res resp.Value, err error) {
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start := time.Now()
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vs := msg.Args[1:]
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if len(vs) != 0 {
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return NOMessage, errInvalidNumberOfArguments
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}
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s.config.write(true)
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return OKMessage(msg, start), nil
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}
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func (config *Config) followHost() string {
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config.mu.RLock()
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v := config._followHost
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config.mu.RUnlock()
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return v
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}
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func (config *Config) followPort() int {
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config.mu.RLock()
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v := config._followPort
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config.mu.RUnlock()
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return int(v)
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}
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func (config *Config) serverID() string {
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config.mu.RLock()
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v := config._serverID
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config.mu.RUnlock()
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return v
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}
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func (config *Config) readOnly() bool {
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config.mu.RLock()
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v := config._readOnly
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config.mu.RUnlock()
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return v
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}
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func (config *Config) requirePass() string {
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config.mu.RLock()
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v := config._requirePass
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config.mu.RUnlock()
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return v
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}
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func (config *Config) leaderAuth() string {
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config.mu.RLock()
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v := config._leaderAuth
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config.mu.RUnlock()
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return v
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}
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func (config *Config) protectedMode() string {
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config.mu.RLock()
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v := config._protectedMode
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config.mu.RUnlock()
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return v
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}
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func (config *Config) maxMemory() int {
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config.mu.RLock()
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v := config._maxMemory
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config.mu.RUnlock()
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return int(v)
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}
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func (config *Config) autoGC() uint64 {
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config.mu.RLock()
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v := config._autoGC
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config.mu.RUnlock()
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return v
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}
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func (config *Config) keepAlive() int64 {
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config.mu.RLock()
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v := config._keepAlive
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config.mu.RUnlock()
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return v
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}
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func (config *Config) setFollowHost(v string) {
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config.mu.Lock()
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config._followHost = v
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config.mu.Unlock()
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}
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func (config *Config) setFollowPort(v int) {
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config.mu.Lock()
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config._followPort = int64(v)
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config.mu.Unlock()
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}
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func (config *Config) setReadOnly(v bool) {
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config.mu.Lock()
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config._readOnly = v
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config.mu.Unlock()
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}
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func (config *Config) logConfig() string {
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config.mu.RLock()
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v := config._logConfig
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config.mu.RUnlock()
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return v
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}
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