/
command_s3_circuitbreaker.go
358 lines (306 loc) · 9.91 KB
/
command_s3_circuitbreaker.go
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package shell
import (
"bytes"
"flag"
"fmt"
"github.com/seaweedfs/seaweedfs/weed/filer"
"github.com/seaweedfs/seaweedfs/weed/pb/s3_pb"
"github.com/seaweedfs/seaweedfs/weed/s3api/s3_constants"
"io"
"strconv"
"strings"
"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
)
var LoadConfig = loadConfig
func init() {
Commands = append(Commands, &commandS3CircuitBreaker{})
}
type commandS3CircuitBreaker struct {
}
func (c *commandS3CircuitBreaker) Name() string {
return "s3.circuitBreaker"
}
func (c *commandS3CircuitBreaker) Help() string {
return `configure and apply s3 circuit breaker options for each bucket
# examples
# add circuit breaker config for global
s3.circuitBreaker -global -type count -actions Read,Write -values 500,200 -apply
# disable global config
s3.circuitBreaker -global -disable -apply
# add circuit breaker config for buckets x,y,z
s3.circuitBreaker -buckets x,y,z -type count -actions Read,Write -values 200,100 -apply
# disable circuit breaker config of x
s3.circuitBreaker -buckets x -disable -apply
# delete circuit breaker config of x
s3.circuitBreaker -buckets x -delete -apply
# clear all circuit breaker config
s3.circuitBreaker -delete -apply
`
}
func (c *commandS3CircuitBreaker) Do(args []string, commandEnv *CommandEnv, writer io.Writer) (err error) {
dir := s3_constants.CircuitBreakerConfigDir
file := s3_constants.CircuitBreakerConfigFile
s3CircuitBreakerCommand := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
buckets := s3CircuitBreakerCommand.String("buckets", "", "the bucket name(s) to configure, eg: -buckets x,y,z")
global := s3CircuitBreakerCommand.Bool("global", false, "configure global circuit breaker")
actions := s3CircuitBreakerCommand.String("actions", "", "comma separated actions names: Read,Write,List,Tagging,Admin")
limitType := s3CircuitBreakerCommand.String("type", "", "'Count' or 'MB'; Count represents the number of simultaneous requests, and MB represents the content size of all simultaneous requests")
values := s3CircuitBreakerCommand.String("values", "", "comma separated values")
disabled := s3CircuitBreakerCommand.Bool("disable", false, "disable global or buckets circuit breaker")
deleted := s3CircuitBreakerCommand.Bool("delete", false, "delete circuit breaker config")
apply := s3CircuitBreakerCommand.Bool("apply", false, "update and apply current configuration")
if err = s3CircuitBreakerCommand.Parse(args); err != nil {
return nil
}
var buf bytes.Buffer
err = LoadConfig(commandEnv, dir, file, &buf)
if err != nil {
return err
}
cbCfg := &s3_pb.S3CircuitBreakerConfig{
Buckets: make(map[string]*s3_pb.S3CircuitBreakerOptions),
}
if buf.Len() > 0 {
if err = filer.ParseS3ConfigurationFromBytes(buf.Bytes(), cbCfg); err != nil {
return err
}
}
if *deleted {
cmdBuckets, cmdActions, _, err := c.initActionsAndValues(buckets, actions, limitType, values, true)
if err != nil {
return err
}
if len(cmdBuckets) <= 0 && !*global {
if len(cmdActions) > 0 {
deleteGlobalActions(cbCfg, cmdActions, limitType)
if cbCfg.Buckets != nil {
var allBuckets []string
for bucket := range cbCfg.Buckets {
allBuckets = append(allBuckets, bucket)
}
deleteBucketsActions(allBuckets, cbCfg, cmdActions, limitType)
}
} else {
cbCfg.Global = nil
cbCfg.Buckets = nil
}
} else {
if len(cmdBuckets) > 0 {
deleteBucketsActions(cmdBuckets, cbCfg, cmdActions, limitType)
}
if *global {
deleteGlobalActions(cbCfg, cmdActions, nil)
}
}
} else {
cmdBuckets, cmdActions, cmdValues, err := c.initActionsAndValues(buckets, actions, limitType, values, *disabled)
if err != nil {
return err
}
if len(cmdActions) > 0 && len(*buckets) <= 0 && !*global {
return fmt.Errorf("one of -global and -buckets must be specified")
}
if len(*buckets) > 0 {
for _, bucket := range cmdBuckets {
var cbOptions *s3_pb.S3CircuitBreakerOptions
var exists bool
if cbOptions, exists = cbCfg.Buckets[bucket]; !exists {
cbOptions = &s3_pb.S3CircuitBreakerOptions{}
cbCfg.Buckets[bucket] = cbOptions
}
cbOptions.Enabled = !*disabled
if len(cmdActions) > 0 {
err = insertOrUpdateValues(cbOptions, cmdActions, cmdValues, limitType)
if err != nil {
return err
}
}
if len(cbOptions.Actions) <= 0 && !cbOptions.Enabled {
delete(cbCfg.Buckets, bucket)
}
}
}
if *global {
globalOptions := cbCfg.Global
if globalOptions == nil {
globalOptions = &s3_pb.S3CircuitBreakerOptions{Actions: make(map[string]int64, len(cmdActions))}
cbCfg.Global = globalOptions
}
globalOptions.Enabled = !*disabled
if len(cmdActions) > 0 {
err = insertOrUpdateValues(globalOptions, cmdActions, cmdValues, limitType)
if err != nil {
return err
}
}
if len(globalOptions.Actions) <= 0 && !globalOptions.Enabled {
cbCfg.Global = nil
}
}
}
buf.Reset()
err = filer.ProtoToText(&buf, cbCfg)
if err != nil {
return err
}
_, _ = fmt.Fprintf(writer, string(buf.Bytes()))
_, _ = fmt.Fprintln(writer)
if *apply {
if err := commandEnv.WithFilerClient(false, func(client filer_pb.SeaweedFilerClient) error {
return filer.SaveInsideFiler(client, dir, file, buf.Bytes())
}); err != nil {
return err
}
}
return nil
}
func loadConfig(commandEnv *CommandEnv, dir string, file string, buf *bytes.Buffer) error {
if err := commandEnv.WithFilerClient(false, func(client filer_pb.SeaweedFilerClient) error {
return filer.ReadEntry(commandEnv.MasterClient, client, dir, file, buf)
}); err != nil && err != filer_pb.ErrNotFound {
return err
}
return nil
}
func insertOrUpdateValues(cbOptions *s3_pb.S3CircuitBreakerOptions, cmdActions []string, cmdValues []int64, limitType *string) error {
if len(*limitType) == 0 {
return fmt.Errorf("type not valid, only 'count' and 'bytes' are allowed")
}
if cbOptions.Actions == nil {
cbOptions.Actions = make(map[string]int64, len(cmdActions))
}
if len(cmdValues) > 0 {
for i, action := range cmdActions {
cbOptions.Actions[s3_constants.Concat(action, *limitType)] = cmdValues[i]
}
}
return nil
}
func deleteBucketsActions(cmdBuckets []string, cbCfg *s3_pb.S3CircuitBreakerConfig, cmdActions []string, limitType *string) {
if cbCfg.Buckets == nil {
return
}
if len(cmdActions) == 0 {
for _, bucket := range cmdBuckets {
delete(cbCfg.Buckets, bucket)
}
} else {
for _, bucket := range cmdBuckets {
if cbOption, ok := cbCfg.Buckets[bucket]; ok {
if len(cmdActions) > 0 && cbOption.Actions != nil {
for _, action := range cmdActions {
delete(cbOption.Actions, s3_constants.Concat(action, *limitType))
}
}
if len(cbOption.Actions) == 0 && !cbOption.Enabled {
delete(cbCfg.Buckets, bucket)
}
}
}
}
if len(cbCfg.Buckets) == 0 {
cbCfg.Buckets = nil
}
}
func deleteGlobalActions(cbCfg *s3_pb.S3CircuitBreakerConfig, cmdActions []string, limitType *string) {
globalOptions := cbCfg.Global
if globalOptions == nil {
return
}
if len(cmdActions) == 0 && globalOptions.Actions != nil {
globalOptions.Actions = nil
return
} else {
for _, action := range cmdActions {
delete(globalOptions.Actions, s3_constants.Concat(action, *limitType))
}
}
if len(globalOptions.Actions) == 0 && !globalOptions.Enabled {
cbCfg.Global = nil
}
}
func (c *commandS3CircuitBreaker) initActionsAndValues(buckets, actions, limitType, values *string, parseValues bool) (cmdBuckets, cmdActions []string, cmdValues []int64, err error) {
if len(*buckets) > 0 {
cmdBuckets = strings.Split(*buckets, ",")
}
if len(*actions) > 0 {
cmdActions = strings.Split(*actions, ",")
//check action valid
for _, action := range cmdActions {
var found bool
for _, allowedAction := range s3_constants.AllowedActions {
if allowedAction == action {
found = true
}
}
if !found {
return nil, nil, nil, fmt.Errorf("value(%s) of flag[-action] not valid, allowed actions: %v", *actions, s3_constants.AllowedActions)
}
}
}
if !parseValues {
if len(cmdActions) < 0 {
for _, action := range s3_constants.AllowedActions {
cmdActions = append(cmdActions, action)
}
}
if len(*limitType) > 0 {
switch *limitType {
case s3_constants.LimitTypeCount:
elements := strings.Split(*values, ",")
if len(cmdActions) != len(elements) {
if len(elements) != 1 || len(elements) == 0 {
return nil, nil, nil, fmt.Errorf("count of flag[-actions] and flag[-counts] not equal")
}
v, err := strconv.Atoi(elements[0])
if err != nil {
return nil, nil, nil, fmt.Errorf("value of -values must be a legal number(s)")
}
for range cmdActions {
cmdValues = append(cmdValues, int64(v))
}
} else {
for _, value := range elements {
v, err := strconv.Atoi(value)
if err != nil {
return nil, nil, nil, fmt.Errorf("value of -values must be a legal number(s)")
}
cmdValues = append(cmdValues, int64(v))
}
}
case s3_constants.LimitTypeBytes:
elements := strings.Split(*values, ",")
if len(cmdActions) != len(elements) {
if len(elements) != 1 || len(elements) == 0 {
return nil, nil, nil, fmt.Errorf("values count of -actions and -values not equal")
}
v, err := parseMBToBytes(elements[0])
if err != nil {
return nil, nil, nil, fmt.Errorf("value of -max must be a legal number(s)")
}
for range cmdActions {
cmdValues = append(cmdValues, v)
}
} else {
for _, value := range elements {
v, err := parseMBToBytes(value)
if err != nil {
return nil, nil, nil, fmt.Errorf("value of -max must be a legal number(s)")
}
cmdValues = append(cmdValues, v)
}
}
default:
return nil, nil, nil, fmt.Errorf("type not valid, only 'count' and 'bytes' are allowed")
}
} else {
*limitType = ""
}
}
return cmdBuckets, cmdActions, cmdValues, nil
}
func parseMBToBytes(valStr string) (int64, error) {
v, err := strconv.Atoi(valStr)
v *= 1024 * 1024
return int64(v), err
}