Refactoring barak
This commit is contained in:
parent
98289b529e
commit
c297f41a9f
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@ -0,0 +1,247 @@
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package main
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import (
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"errors"
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"fmt"
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"io/ioutil"
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"net"
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"net/http"
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"os"
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"sync"
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"time"
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"github.com/tendermint/tendermint/binary"
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. "github.com/tendermint/tendermint/cmd/barak/types"
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. "github.com/tendermint/tendermint/common"
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pcm "github.com/tendermint/tendermint/process"
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"github.com/tendermint/tendermint/rpc/server"
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)
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type BarakOptions struct {
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Validators []Validator
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ListenAddress string
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StartNonce uint64
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Registries []string
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}
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// Read options from a file, or stdin if optionsFile is ""
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func ReadBarakOptions(optFile string) *BarakOptions {
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var optBytes []byte
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var err error
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if optFile != "" {
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optBytes, err = ioutil.ReadFile(optFile)
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} else {
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optBytes, err = ioutil.ReadAll(os.Stdin)
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}
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if err != nil {
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panic(Fmt("Error reading input: %v", err))
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}
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opt := binary.ReadJSON(&BarakOptions{}, optBytes, &err).(*BarakOptions)
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if err != nil {
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panic(Fmt("Error parsing input: %v", err))
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}
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return opt
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}
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func ensureRootDir() (rootDir string) {
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rootDir = os.Getenv("BRKROOT")
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if rootDir == "" {
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rootDir = os.Getenv("HOME") + "/.barak"
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}
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err := EnsureDir(rootDir)
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if err != nil {
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panic(Fmt("Error creating barak rootDir: %v", err))
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}
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return
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}
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func NewBarakFromOptions(opt *BarakOptions) *Barak {
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rootDir := ensureRootDir()
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barak := NewBarak(rootDir, opt.StartNonce, opt.Validators)
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for _, registry := range opt.Registries {
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barak.AddRegistry(registry)
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}
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barak.OpenListener(opt.ListenAddress)
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// Debug.
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fmt.Printf("Options: %v\n", opt)
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fmt.Printf("Barak: %v\n", barak)
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return barak
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}
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//--------------------------------------------------------------------------------
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type Barak struct {
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mtx sync.Mutex
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pid int
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nonce uint64
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processes map[string]*pcm.Process
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validators []Validator
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listeners []net.Listener
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rootDir string
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registries []string
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}
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func NewBarak(rootDir string, nonce uint64, validators []Validator) *Barak {
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return &Barak{
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pid: os.Getpid(),
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nonce: nonce,
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processes: make(map[string]*pcm.Process),
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validators: validators,
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listeners: nil,
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rootDir: rootDir,
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registries: nil,
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}
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}
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func (brk *Barak) RootDir() string {
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brk.mtx.Lock()
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defer brk.mtx.Unlock()
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return brk.rootDir
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}
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func (brk *Barak) ListProcesses() []*pcm.Process {
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brk.mtx.Lock()
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defer brk.mtx.Unlock()
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processes := []*pcm.Process{}
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for _, process := range processes {
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processes = append(processes, process)
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}
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return processes
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}
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func (brk *Barak) GetProcess(label string) *pcm.Process {
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brk.mtx.Lock()
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defer brk.mtx.Unlock()
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return brk.processes[label]
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}
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func (brk *Barak) AddProcess(label string, process *pcm.Process) error {
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brk.mtx.Lock()
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defer brk.mtx.Unlock()
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existing := brk.processes[label]
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if existing != nil && existing.EndTime.IsZero() {
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return fmt.Errorf("Process already exists: %v", label)
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}
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brk.processes[label] = process
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return nil
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}
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func (brk *Barak) StopProcess(label string, kill bool) error {
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barak.mtx.Lock()
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proc := barak.processes[label]
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barak.mtx.Unlock()
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if proc == nil {
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return fmt.Errorf("Process does not exist: %v", label)
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}
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err := pcm.Stop(proc, kill)
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return err
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}
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func (brk *Barak) ListValidators() []Validator {
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brk.mtx.Lock()
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defer brk.mtx.Unlock()
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return brk.validators
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}
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func (brk *Barak) ListListeners() []net.Listener {
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brk.mtx.Lock()
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defer brk.mtx.Unlock()
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return brk.listeners
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}
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func (brk *Barak) OpenListener(addr string) net.Listener {
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brk.mtx.Lock()
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defer brk.mtx.Unlock()
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// Start rpc server.
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mux := http.NewServeMux()
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mux.HandleFunc("/download", ServeFileHandler)
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mux.HandleFunc("/register", RegisterHandler)
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// TODO: mux.HandleFunc("/upload", UploadFile)
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rpcserver.RegisterRPCFuncs(mux, Routes)
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listener := rpcserver.StartHTTPServer(addr, mux)
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brk.listeners = append(brk.listeners, listener)
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return listener
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}
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func (brk *Barak) CloseListener(addr string) {
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brk.mtx.Lock()
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defer brk.mtx.Unlock()
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filtered := []net.Listener{}
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for _, listener := range brk.listeners {
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if listener.Addr().String() == addr {
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continue
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}
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filtered = append(filtered, listener)
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}
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brk.listeners = filtered
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}
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func (brk *Barak) GetRegistries() []string {
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brk.mtx.Lock()
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defer brk.mtx.Unlock()
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return brk.registries
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}
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func (brk *Barak) AddRegistry(registry string) {
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brk.mtx.Lock()
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defer brk.mtx.Unlock()
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brk.registries = append(brk.registries, registry)
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}
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func (brk *Barak) RemoveRegistry(registry string) {
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brk.mtx.Lock()
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defer brk.mtx.Unlock()
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filtered := []string{}
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for _, reg := range brk.registries {
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if registry == reg {
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continue
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}
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filtered = append(filtered, reg)
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}
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brk.registries = filtered
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}
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func (brk *Barak) StartRegisterRoutine() {
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// Register this barak with central listener
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go func() {
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// Workaround around issues when registries register on themselves upon startup.
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time.Sleep(3 * time.Second)
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for {
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// Every hour, register with the registries.
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for _, registry := range brk.registries {
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resp, err := http.Get(registry + "/register")
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if err != nil {
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fmt.Printf("Error registering to registry %v:\n %v\n", registry, err)
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} else if resp.StatusCode != 200 {
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body, _ := ioutil.ReadAll(resp.Body)
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fmt.Printf("Error registering to registry %v:\n %v\n", registry, string(body))
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} else {
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body, _ := ioutil.ReadAll(resp.Body)
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fmt.Printf("Successfully registered with registry %v\n %v\n", registry, string(body))
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}
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}
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time.Sleep(1 * time.Hour)
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}
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}()
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}
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// Write pid to file.
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func (brk *Barak) WritePidFile() {
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err := WriteFileAtomic(brk.rootDir+"/pidfile", []byte(Fmt("%v", brk.pid)))
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if err != nil {
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panic(Fmt("Error writing pidfile: %v", err))
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}
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}
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func (brk *Barak) CheckIncrNonce(newNonce uint64) error {
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brk.mtx.Lock()
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defer brk.mtx.Unlock()
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if brk.nonce+1 != newNonce {
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return errors.New("Replay error")
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}
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brk.nonce += 1
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return nil
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}
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@ -9,11 +9,9 @@ import (
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"flag"
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"fmt"
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"io"
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"io/ioutil"
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"net/http"
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"os"
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"reflect"
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"sync"
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"time"
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"github.com/tendermint/tendermint/binary"
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@ -24,36 +22,24 @@ import (
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"github.com/tendermint/tendermint/rpc/server"
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)
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var Routes = map[string]*rpcserver.RPCFunc{
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"status": rpcserver.NewRPCFunc(Status, []string{}),
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"run": rpcserver.NewRPCFunc(Run, []string{"auth_command"}),
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// NOTE: also, two special non-JSONRPC routes called "download" and "upload"
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}
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var Routes map[string]*rpcserver.RPCFunc
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type Options struct {
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Validators []Validator
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ListenAddress string
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StartNonce uint64
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Registries []string
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func init() {
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Routes = map[string]*rpcserver.RPCFunc{
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"status": rpcserver.NewRPCFunc(Status, []string{}),
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"run": rpcserver.NewRPCFunc(Run, []string{"auth_command"}),
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// NOTE: also, two special non-JSONRPC routes called "download" and "upload"
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}
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}
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// Global instance
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var barak = struct {
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mtx sync.Mutex
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pid int
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nonce uint64
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processes map[string]*pcm.Process
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validators []Validator
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rootDir string
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registries []string
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}{
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mtx: sync.Mutex{},
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pid: os.Getpid(),
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nonce: 0,
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processes: make(map[string]*pcm.Process),
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validators: nil,
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rootDir: "",
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registries: nil,
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var barak *Barak
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// Parse command-line options
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func parseFlags() (optionsFile string) {
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flag.StringVar(&optionsFile, "options-file", "", "Read options from file instead of stdin")
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flag.Parse()
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return
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}
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func main() {
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@ -62,71 +48,14 @@ func main() {
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// Apply bare tendermint/* configuration.
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cfg.ApplyConfig(cfg.MapConfig(map[string]interface{}{"log_level": "info"}))
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// read flags to change options file.
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var optionsBytes []byte
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var optionsFile string
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var err error
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flag.StringVar(&optionsFile, "options-file", "", "Read options from file instead of stdin")
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flag.Parse()
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if optionsFile != "" {
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optionsBytes, err = ioutil.ReadFile(optionsFile)
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} else {
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optionsBytes, err = ioutil.ReadAll(os.Stdin)
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}
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if err != nil {
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panic(Fmt("Error reading input: %v", err))
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}
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options := binary.ReadJSON(&Options{}, optionsBytes, &err).(*Options)
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if err != nil {
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panic(Fmt("Error parsing input: %v", err))
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}
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barak.nonce = options.StartNonce
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barak.validators = options.Validators
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barak.rootDir = os.Getenv("BRKROOT")
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if barak.rootDir == "" {
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barak.rootDir = os.Getenv("HOME") + "/.barak"
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}
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err = EnsureDir(barak.rootDir)
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if err != nil {
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panic(Fmt("Error creating barak rootDir: %v", err))
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}
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barak.registries = options.Registries
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// Debug.
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fmt.Printf("Options: %v\n", options)
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fmt.Printf("Barak: %v\n", barak)
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// Start rpc server.
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mux := http.NewServeMux()
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mux.HandleFunc("/download", ServeFile)
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mux.HandleFunc("/register", Register)
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// TODO: mux.HandleFunc("/upload", UploadFile)
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rpcserver.RegisterRPCFuncs(mux, Routes)
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rpcserver.StartHTTPServer(options.ListenAddress, mux)
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// Register this barak with central listener
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for _, registry := range barak.registries {
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go func(registry string) {
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for {
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resp, err := http.Get(registry + "/register")
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if err != nil {
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fmt.Printf("Error registering to registry %v:\n %v\n", registry, err)
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time.Sleep(1 * time.Hour)
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continue
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}
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body, _ := ioutil.ReadAll(resp.Body)
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fmt.Printf("Successfully registered with registry %v\n %v\n", registry, string(body))
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return
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}
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}(registry)
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}
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// Write pid to file. This should be the last thing before TrapSignal.
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err = WriteFileAtomic(barak.rootDir+"/pidfile", []byte(Fmt("%v", barak.pid)))
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if err != nil {
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panic(Fmt("Error writing pidfile: %v", err))
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}
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// Read options
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optionsFile := parseFlags()
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options := ReadBarakOptions(optionsFile)
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// Init barak
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barak = NewBarakFromOptions(options)
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barak.StartRegisterRoutine()
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barak.WritePidFile() // This should be last, before TrapSignal().
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TrapSignal(func() {
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fmt.Println("Barak shutting down")
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})
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@ -157,12 +86,16 @@ func Run(authCommand AuthCommand) (interface{}, error) {
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log.Info(Fmt("Run() received command %v:\n%v", reflect.TypeOf(command), command))
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// Issue command
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switch c := command.(type) {
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case CommandRunProcess:
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return RunProcess(c.Wait, c.Label, c.ExecPath, c.Args, c.Input)
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case CommandStartProcess:
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return StartProcess(c.Wait, c.Label, c.ExecPath, c.Args, c.Input)
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case CommandStopProcess:
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return StopProcess(c.Label, c.Kill)
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case CommandListProcesses:
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return ListProcesses()
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case CommandOpenListener:
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return OpenListener(c.Addr)
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case CommandCloseListener:
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return CloseListener(c.Addr)
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default:
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return nil, errors.New("Invalid endpoint for command")
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}
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@ -182,7 +115,7 @@ func parseValidateCommand(authCommand AuthCommand) (Command, error) {
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commandJSONStr := authCommand.CommandJSONStr
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signatures := authCommand.Signatures
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// Validate commandJSONStr
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if !validate([]byte(commandJSONStr), barak.validators, signatures) {
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if !validate([]byte(commandJSONStr), barak.ListValidators(), signatures) {
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fmt.Printf("Failed validation attempt")
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return nil, errors.New("Validation error")
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}
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@ -194,11 +127,7 @@ func parseValidateCommand(authCommand AuthCommand) (Command, error) {
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return nil, errors.New("Command parse error")
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}
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// Prevent replays
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if barak.nonce+1 != command.Nonce {
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return nil, errors.New("Replay error")
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} else {
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barak.nonce += 1
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}
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barak.CheckIncrNonce(command.Nonce)
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return command.Command, nil
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}
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@ -206,48 +135,42 @@ func parseValidateCommand(authCommand AuthCommand) (Command, error) {
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// RPC base commands
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// WARNING Not validated, do not export to routes.
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func RunProcess(wait bool, label string, execPath string, args []string, input string) (*ResponseRunProcess, error) {
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barak.mtx.Lock()
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func StartProcess(wait bool, label string, execPath string, args []string, input string) (*ResponseStartProcess, error) {
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// First, see if there already is a process labeled 'label'
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existing := barak.processes[label]
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existing := barak.GetProcess(label)
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if existing != nil && existing.EndTime.IsZero() {
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barak.mtx.Unlock()
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return nil, fmt.Errorf("Process already exists: %v", label)
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}
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// Otherwise, create one.
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err := EnsureDir(barak.rootDir + "/outputs")
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err := EnsureDir(barak.RootDir() + "/outputs")
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if err != nil {
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return nil, fmt.Errorf("Failed to create outputs dir: %v", err)
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}
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outPath := Fmt("%v/outputs/%v_%v.out", barak.rootDir, label, time.Now().Format("2006_01_02_15_04_05_MST"))
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outPath := Fmt("%v/outputs/%v_%v.out", barak.RootDir(), label, time.Now().Format("2006_01_02_15_04_05_MST"))
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proc, err := pcm.Create(pcm.ProcessModeDaemon, label, execPath, args, input, outPath)
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if err == nil {
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barak.processes[label] = proc
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}
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barak.mtx.Unlock()
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if err != nil {
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return nil, err
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}
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barak.AddProcess(label, proc)
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if wait {
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<-proc.WaitCh
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output := pcm.ReadOutput(proc)
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fmt.Println("Read output", output)
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if proc.ExitState == nil {
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return &ResponseRunProcess{
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return &ResponseStartProcess{
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Success: true,
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Output: output,
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}, nil
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} else {
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return &ResponseRunProcess{
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return &ResponseStartProcess{
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Success: proc.ExitState.Success(), // Would be always false?
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Output: output,
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}, nil
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}
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} else {
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return &ResponseRunProcess{
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return &ResponseStartProcess{
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Success: true,
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Output: "",
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}, nil
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||||
|
@ -255,36 +178,35 @@ func RunProcess(wait bool, label string, execPath string, args []string, input s
|
|||
}
|
||||
|
||||
func StopProcess(label string, kill bool) (*ResponseStopProcess, error) {
|
||||
barak.mtx.Lock()
|
||||
proc := barak.processes[label]
|
||||
barak.mtx.Unlock()
|
||||
|
||||
if proc == nil {
|
||||
return nil, fmt.Errorf("Process does not exist: %v", label)
|
||||
}
|
||||
|
||||
err := pcm.Stop(proc, kill)
|
||||
err := barak.StopProcess(label, kill)
|
||||
return &ResponseStopProcess{}, err
|
||||
}
|
||||
|
||||
func ListProcesses() (*ResponseListProcesses, error) {
|
||||
var procs = []*pcm.Process{}
|
||||
barak.mtx.Lock()
|
||||
fmt.Println("Processes: %v", barak.processes)
|
||||
for _, proc := range barak.processes {
|
||||
procs = append(procs, proc)
|
||||
}
|
||||
barak.mtx.Unlock()
|
||||
|
||||
procs := barak.ListProcesses()
|
||||
return &ResponseListProcesses{
|
||||
Processes: procs,
|
||||
}, nil
|
||||
}
|
||||
|
||||
func OpenListener(addr string) (*ResponseOpenListener, error) {
|
||||
listener := barak.OpenListener(addr)
|
||||
return &ResponseOpenListener{
|
||||
Addr: listener.Addr().String(),
|
||||
}, nil
|
||||
}
|
||||
|
||||
func CloseListener(addr string) (*ResponseCloseListener, error) {
|
||||
barak.CloseListener(addr)
|
||||
return &ResponseCloseListener{}, nil
|
||||
}
|
||||
|
||||
//--------------------------------------------------------------------------------
|
||||
|
||||
// Another barak instance registering its external
|
||||
// address to a remote barak.
|
||||
func Register(w http.ResponseWriter, req *http.Request) {
|
||||
registry, err := os.OpenFile(barak.rootDir+"/registry.log", os.O_RDWR|os.O_APPEND|os.O_CREATE, 0600)
|
||||
func RegisterHandler(w http.ResponseWriter, req *http.Request) {
|
||||
registry, err := os.OpenFile(barak.RootDir()+"/registry.log", os.O_RDWR|os.O_APPEND|os.O_CREATE, 0600)
|
||||
if err != nil {
|
||||
http.Error(w, "Could not open registry file. Please contact the administrator", 500)
|
||||
return
|
||||
|
@ -297,7 +219,7 @@ func Register(w http.ResponseWriter, req *http.Request) {
|
|||
w.Write([]byte("Noted!"))
|
||||
}
|
||||
|
||||
func ServeFile(w http.ResponseWriter, req *http.Request) {
|
||||
func ServeFileHandler(w http.ResponseWriter, req *http.Request) {
|
||||
authCommandStr := req.FormValue("auth_command")
|
||||
command, err := parseValidateCommandStr(authCommandStr)
|
||||
if err != nil {
|
||||
|
@ -316,7 +238,11 @@ func ServeFile(w http.ResponseWriter, req *http.Request) {
|
|||
// local paths must be explicitly local, e.g. "./xyz"
|
||||
} else if path[0] != '/' {
|
||||
// If not an absolute path, then is label
|
||||
proc := barak.processes[path]
|
||||
proc := barak.GetProcess(path)
|
||||
if proc == nil {
|
||||
http.Error(w, Fmt("Unknown process label: %v", path), 400)
|
||||
return
|
||||
}
|
||||
path = proc.OutputPath
|
||||
}
|
||||
file, err := os.Open(path)
|
||||
|
|
|
@ -18,22 +18,26 @@ type NoncedCommand struct {
|
|||
type Command interface{}
|
||||
|
||||
const (
|
||||
commandTypeRunProcess = 0x01
|
||||
commandTypeStartProcess = 0x01
|
||||
commandTypeStopProcess = 0x02
|
||||
commandTypeListProcesses = 0x03
|
||||
commandTypeServeFile = 0x04
|
||||
commandTypeOpenListener = 0x05
|
||||
commandTypeCloseListener = 0x06
|
||||
)
|
||||
|
||||
// for binary.readReflect
|
||||
var _ = binary.RegisterInterface(
|
||||
struct{ Command }{},
|
||||
binary.ConcreteType{CommandRunProcess{}, commandTypeRunProcess},
|
||||
binary.ConcreteType{CommandStartProcess{}, commandTypeStartProcess},
|
||||
binary.ConcreteType{CommandStopProcess{}, commandTypeStopProcess},
|
||||
binary.ConcreteType{CommandListProcesses{}, commandTypeListProcesses},
|
||||
binary.ConcreteType{CommandServeFile{}, commandTypeServeFile},
|
||||
binary.ConcreteType{CommandOpenListener{}, commandTypeOpenListener},
|
||||
binary.ConcreteType{CommandCloseListener{}, commandTypeCloseListener},
|
||||
)
|
||||
|
||||
type CommandRunProcess struct {
|
||||
type CommandStartProcess struct {
|
||||
Wait bool
|
||||
Label string
|
||||
ExecPath string
|
||||
|
@ -51,3 +55,11 @@ type CommandListProcesses struct{}
|
|||
type CommandServeFile struct {
|
||||
Path string
|
||||
}
|
||||
|
||||
type CommandOpenListener struct {
|
||||
Addr string
|
||||
}
|
||||
|
||||
type CommandCloseListener struct {
|
||||
Addr string
|
||||
}
|
||||
|
|
|
@ -13,7 +13,7 @@ type ResponseStatus struct {
|
|||
type ResponseRegister struct {
|
||||
}
|
||||
|
||||
type ResponseRunProcess struct {
|
||||
type ResponseStartProcess struct {
|
||||
Success bool
|
||||
Output string
|
||||
}
|
||||
|
@ -24,3 +24,10 @@ type ResponseStopProcess struct {
|
|||
type ResponseListProcesses struct {
|
||||
Processes []*pcm.Process
|
||||
}
|
||||
|
||||
type ResponseOpenListener struct {
|
||||
Addr string
|
||||
}
|
||||
|
||||
type ResponseCloseListener struct {
|
||||
}
|
||||
|
|
|
@ -19,7 +19,7 @@ import (
|
|||
// (First the command(s) are signed by all validators,
|
||||
// and then it is broadcast).
|
||||
|
||||
func RunProcess(privKey acm.PrivKey, remote string, command btypes.CommandRunProcess) (response btypes.ResponseRunProcess, err error) {
|
||||
func StartProcess(privKey acm.PrivKey, remote string, command btypes.CommandStartProcess) (response btypes.ResponseStartProcess, err error) {
|
||||
nonce, err := GetNonce(remote)
|
||||
if err != nil {
|
||||
return response, err
|
||||
|
|
|
@ -87,7 +87,7 @@ func main() {
|
|||
cli.Command{
|
||||
Name: "run",
|
||||
Usage: "run process",
|
||||
Action: cliRunProcess,
|
||||
Action: cliStartProcess,
|
||||
Flags: []cli.Flag{
|
||||
labelFlag,
|
||||
bgFlag,
|
||||
|
@ -145,14 +145,14 @@ func cliGetStatus(c *cli.Context) {
|
|||
wg.Wait()
|
||||
}
|
||||
|
||||
func cliRunProcess(c *cli.Context) {
|
||||
func cliStartProcess(c *cli.Context) {
|
||||
args := c.Args()
|
||||
if len(args) < 1 {
|
||||
Exit("Must specify <execPath> <args...>")
|
||||
}
|
||||
execPath := args[0]
|
||||
args = args[1:]
|
||||
command := btypes.CommandRunProcess{
|
||||
command := btypes.CommandStartProcess{
|
||||
Wait: !c.Bool("bg"),
|
||||
Label: c.String("label"),
|
||||
ExecPath: execPath,
|
||||
|
@ -164,7 +164,7 @@ func cliRunProcess(c *cli.Context) {
|
|||
wg.Add(1)
|
||||
go func(remote string) {
|
||||
defer wg.Done()
|
||||
response, err := RunProcess(Config.PrivKey, remote, command)
|
||||
response, err := StartProcess(Config.PrivKey, remote, command)
|
||||
if err != nil {
|
||||
fmt.Printf("%v failure. %v\n", remote, err)
|
||||
} else {
|
||||
|
|
|
@ -16,19 +16,20 @@ import (
|
|||
. "github.com/tendermint/tendermint/rpc/types"
|
||||
)
|
||||
|
||||
func StartHTTPServer(listenAddr string, handler http.Handler) {
|
||||
func StartHTTPServer(listenAddr string, handler http.Handler) net.Listener {
|
||||
log.Info(Fmt("Starting RPC HTTP server on %v", listenAddr))
|
||||
listener, err := net.Listen("tcp", listenAddr)
|
||||
if err != nil {
|
||||
Exit(Fmt("Failed to listen to %v", listenAddr))
|
||||
}
|
||||
go func() {
|
||||
listener, err := net.Listen("tcp", listenAddr)
|
||||
if err != nil {
|
||||
Exit(Fmt("Failed to listen to %v", listenAddr))
|
||||
}
|
||||
res := http.Serve(
|
||||
listener,
|
||||
RecoverAndLogHandler(handler),
|
||||
)
|
||||
log.Crit("RPC HTTP server stopped", "result", res)
|
||||
}()
|
||||
return listener
|
||||
}
|
||||
|
||||
func WriteRPCResponse(w http.ResponseWriter, res RPCResponse) {
|
||||
|
|
Loading…
Reference in New Issue