"errors"
"flag"
"fmt"
- "git.curoverse.com/arvados.git/sdk/go/arvadosclient"
- "git.curoverse.com/arvados.git/sdk/go/keepclient"
- "github.com/gorilla/mux"
"io"
"io/ioutil"
"log"
"net/http"
"os"
"os/signal"
- "reflect"
"regexp"
+ "strings"
"sync"
"syscall"
"time"
+
+ "git.curoverse.com/arvados.git/sdk/go/arvados"
+ "git.curoverse.com/arvados.git/sdk/go/arvadosclient"
+ "git.curoverse.com/arvados.git/sdk/go/config"
+ "git.curoverse.com/arvados.git/sdk/go/keepclient"
+ "github.com/coreos/go-systemd/daemon"
+ "github.com/ghodss/yaml"
+ "github.com/gorilla/mux"
)
-// Default TCP address on which to listen for requests.
-// Initialized by the -listen flag.
-const DEFAULT_ADDR = ":25107"
+type Config struct {
+ Client arvados.Client
+ Listen string
+ DisableGet bool
+ DisablePut bool
+ DefaultReplicas int
+ Timeout arvados.Duration
+ PIDFile string
+ Debug bool
+}
-var listener net.Listener
+func DefaultConfig() *Config {
+ return &Config{
+ Listen: ":25107",
+ Timeout: arvados.Duration(15 * time.Second),
+ }
+}
-func main() {
- var (
- listen string
- no_get bool
- no_put bool
- default_replicas int
- timeout int64
- pidfile string
- )
-
- flagset := flag.NewFlagSet("default", flag.ExitOnError)
-
- flagset.StringVar(
- &listen,
- "listen",
- DEFAULT_ADDR,
- "Interface on which to listen for requests, in the format "+
- "ipaddr:port. e.g. -listen=10.0.1.24:8000. Use -listen=:port "+
- "to listen on all network interfaces.")
-
- flagset.BoolVar(
- &no_get,
- "no-get",
- false,
- "If set, disable GET operations")
-
- flagset.BoolVar(
- &no_put,
- "no-put",
- false,
- "If set, disable PUT operations")
-
- flagset.IntVar(
- &default_replicas,
- "default-replicas",
- 2,
- "Default number of replicas to write if not specified by the client.")
-
- flagset.Int64Var(
- &timeout,
- "timeout",
- 15,
- "Timeout on requests to internal Keep services (default 15 seconds)")
-
- flagset.StringVar(
- &pidfile,
- "pid",
- "",
- "Path to write pid file")
+var (
+ listener net.Listener
+ router http.Handler
+)
+func main() {
+ cfg := DefaultConfig()
+
+ flagset := flag.NewFlagSet("keepproxy", flag.ExitOnError)
+ flagset.Usage = usage
+
+ const deprecated = " (DEPRECATED -- use config file instead)"
+ flagset.StringVar(&cfg.Listen, "listen", cfg.Listen, "Local port to listen on."+deprecated)
+ flagset.BoolVar(&cfg.DisableGet, "no-get", cfg.DisableGet, "Disable GET operations."+deprecated)
+ flagset.BoolVar(&cfg.DisablePut, "no-put", cfg.DisablePut, "Disable PUT operations."+deprecated)
+ flagset.IntVar(&cfg.DefaultReplicas, "default-replicas", cfg.DefaultReplicas, "Default number of replicas to write if not specified by the client. If 0, use site default."+deprecated)
+ flagset.StringVar(&cfg.PIDFile, "pid", cfg.PIDFile, "Path to write pid file."+deprecated)
+ timeoutSeconds := flagset.Int("timeout", int(time.Duration(cfg.Timeout)/time.Second), "Timeout (in seconds) on requests to internal Keep services."+deprecated)
+
+ var cfgPath string
+ const defaultCfgPath = "/etc/arvados/keepproxy/keepproxy.yml"
+ flagset.StringVar(&cfgPath, "config", defaultCfgPath, "Configuration file `path`")
+ dumpConfig := flagset.Bool("dump-config", false, "write current configuration to stdout and exit")
flagset.Parse(os.Args[1:])
- arv, err := arvadosclient.MakeArvadosClient()
+ err := config.LoadFile(cfg, cfgPath)
+ if err != nil {
+ h := os.Getenv("ARVADOS_API_HOST")
+ t := os.Getenv("ARVADOS_API_TOKEN")
+ if h == "" || t == "" || !os.IsNotExist(err) || cfgPath != defaultCfgPath {
+ log.Fatal(err)
+ }
+ log.Print("DEPRECATED: No config file found, but ARVADOS_API_HOST and ARVADOS_API_TOKEN environment variables are set. Please use a config file instead.")
+ cfg.Client.APIHost = h
+ cfg.Client.AuthToken = t
+ if regexp.MustCompile("^(?i:1|yes|true)$").MatchString(os.Getenv("ARVADOS_API_HOST_INSECURE")) {
+ cfg.Client.Insecure = true
+ }
+ if y, err := yaml.Marshal(cfg); err == nil && !*dumpConfig {
+ log.Print("Current configuration:\n", string(y))
+ }
+ cfg.Timeout = arvados.Duration(time.Duration(*timeoutSeconds) * time.Second)
+ }
+
+ if *dumpConfig {
+ log.Fatal(config.DumpAndExit(cfg))
+ }
+
+ arv, err := arvadosclient.New(&cfg.Client)
if err != nil {
log.Fatalf("Error setting up arvados client %s", err.Error())
}
- kc, err := keepclient.MakeKeepClient(&arv)
+ if cfg.Debug {
+ keepclient.DebugPrintf = log.Printf
+ }
+ kc, err := keepclient.MakeKeepClient(arv)
if err != nil {
log.Fatalf("Error setting up keep client %s", err.Error())
}
- if pidfile != "" {
- f, err := os.Create(pidfile)
+ if cfg.PIDFile != "" {
+ f, err := os.Create(cfg.PIDFile)
+ if err != nil {
+ log.Fatal(err)
+ }
+ defer f.Close()
+ err = syscall.Flock(int(f.Fd()), syscall.LOCK_EX|syscall.LOCK_NB)
+ if err != nil {
+ log.Fatalf("flock(%s): %s", cfg.PIDFile, err)
+ }
+ defer os.Remove(cfg.PIDFile)
+ err = f.Truncate(0)
+ if err != nil {
+ log.Fatalf("truncate(%s): %s", cfg.PIDFile, err)
+ }
+ _, err = fmt.Fprint(f, os.Getpid())
if err != nil {
- log.Fatalf("Error writing pid file (%s): %s", pidfile, err.Error())
+ log.Fatalf("write(%s): %s", cfg.PIDFile, err)
+ }
+ err = f.Sync()
+ if err != nil {
+ log.Fatal("sync(%s): %s", cfg.PIDFile, err)
}
- fmt.Fprint(f, os.Getpid())
- f.Close()
- defer os.Remove(pidfile)
}
- kc.Want_replicas = default_replicas
-
- kc.Client.Timeout = time.Duration(timeout) * time.Second
+ if cfg.DefaultReplicas > 0 {
+ kc.Want_replicas = cfg.DefaultReplicas
+ }
+ kc.Client.(*http.Client).Timeout = time.Duration(cfg.Timeout)
+ go kc.RefreshServices(5*time.Minute, 3*time.Second)
- listener, err = net.Listen("tcp", listen)
+ listener, err = net.Listen("tcp", cfg.Listen)
if err != nil {
- log.Fatalf("Could not listen on %v", listen)
+ log.Fatalf("listen(%s): %s", cfg.Listen, err)
}
-
- go RefreshServicesList(kc)
+ if _, err := daemon.SdNotify(false, "READY=1"); err != nil {
+ log.Printf("Error notifying init daemon: %v", err)
+ }
+ log.Println("Listening at", listener.Addr())
// Shut down the server gracefully (by closing the listener)
// if SIGTERM is received.
signal.Notify(term, syscall.SIGTERM)
signal.Notify(term, syscall.SIGINT)
- log.Printf("Arvados Keep proxy started listening on %v", listener.Addr())
-
- // Start listening for requests.
- http.Serve(listener, MakeRESTRouter(!no_get, !no_put, kc))
+ // Start serving requests.
+ router = MakeRESTRouter(!cfg.DisableGet, !cfg.DisablePut, kc)
+ http.Serve(listener, router)
log.Println("shutting down")
}
expireTime int64
}
-// Refresh the keep service list every five minutes.
-func RefreshServicesList(kc *keepclient.KeepClient) {
- var previousRoots = []map[string]string{}
- var delay time.Duration = 0
- for {
- time.Sleep(delay * time.Second)
- delay = 300
- if err := kc.DiscoverKeepServers(); err != nil {
- log.Println("Error retrieving services list:", err)
- delay = 3
- continue
- }
- newRoots := []map[string]string{kc.LocalRoots(), kc.GatewayRoots()}
- if !reflect.DeepEqual(previousRoots, newRoots) {
- log.Printf("Updated services list: locals %v gateways %v", newRoots[0], newRoots[1])
- }
- if len(newRoots[0]) == 0 {
- log.Print("WARNING: No local services. Retrying in 3 seconds.")
- delay = 3
- }
- previousRoots = newRoots
- }
-}
-
// Cache the token and set an expire time. If we already have an expire time
// on the token, it is not updated.
func (this *ApiTokenCache) RememberToken(token string) {
}
func GetRemoteAddress(req *http.Request) string {
- if realip := req.Header.Get("X-Real-IP"); realip != "" {
- if forwarded := req.Header.Get("X-Forwarded-For"); forwarded != realip {
- return fmt.Sprintf("%s (X-Forwarded-For %s)", realip, forwarded)
- } else {
- return realip
- }
+ if xff := req.Header.Get("X-Forwarded-For"); xff != "" {
+ return xff + "," + req.RemoteAddr
}
return req.RemoteAddr
}
-func CheckAuthorizationHeader(kc keepclient.KeepClient, cache *ApiTokenCache, req *http.Request) (pass bool, tok string) {
+func CheckAuthorizationHeader(kc *keepclient.KeepClient, cache *ApiTokenCache, req *http.Request) (pass bool, tok string) {
var auth string
if auth = req.Header.Get("Authorization"); auth == "" {
return false, ""
}
if cache.RecallToken(tok) {
- // Valid in the cache, short circut
+ // Valid in the cache, short circuit
return true, tok
}
return true, tok
}
-type GetBlockHandler struct {
- *keepclient.KeepClient
- *ApiTokenCache
-}
-
-type PutBlockHandler struct {
- *keepclient.KeepClient
- *ApiTokenCache
-}
-
-type IndexHandler struct {
+type proxyHandler struct {
+ http.Handler
*keepclient.KeepClient
*ApiTokenCache
}
-type InvalidPathHandler struct{}
-
-type OptionsHandler struct{}
-
-// MakeRESTRouter
-// Returns a mux.Router that passes GET and PUT requests to the
-// appropriate handlers.
-//
-func MakeRESTRouter(
- enable_get bool,
- enable_put bool,
- kc *keepclient.KeepClient) *mux.Router {
-
- t := &ApiTokenCache{tokens: make(map[string]int64), expireTime: 300}
-
+// MakeRESTRouter returns an http.Handler that passes GET and PUT
+// requests to the appropriate handlers.
+func MakeRESTRouter(enable_get bool, enable_put bool, kc *keepclient.KeepClient) http.Handler {
rest := mux.NewRouter()
+ h := &proxyHandler{
+ Handler: rest,
+ KeepClient: kc,
+ ApiTokenCache: &ApiTokenCache{
+ tokens: make(map[string]int64),
+ expireTime: 300,
+ },
+ }
if enable_get {
- rest.Handle(`/{locator:[0-9a-f]{32}\+.*}`,
- GetBlockHandler{kc, t}).Methods("GET", "HEAD")
- rest.Handle(`/{locator:[0-9a-f]{32}}`, GetBlockHandler{kc, t}).Methods("GET", "HEAD")
+ rest.HandleFunc(`/{locator:[0-9a-f]{32}\+.*}`, h.Get).Methods("GET", "HEAD")
+ rest.HandleFunc(`/{locator:[0-9a-f]{32}}`, h.Get).Methods("GET", "HEAD")
// List all blocks
- rest.Handle(`/index`, IndexHandler{kc, t}).Methods("GET")
+ rest.HandleFunc(`/index`, h.Index).Methods("GET")
// List blocks whose hash has the given prefix
- rest.Handle(`/index/{prefix:[0-9a-f]{0,32}}`, IndexHandler{kc, t}).Methods("GET")
+ rest.HandleFunc(`/index/{prefix:[0-9a-f]{0,32}}`, h.Index).Methods("GET")
}
if enable_put {
- rest.Handle(`/{locator:[0-9a-f]{32}\+.*}`, PutBlockHandler{kc, t}).Methods("PUT")
- rest.Handle(`/{locator:[0-9a-f]{32}}`, PutBlockHandler{kc, t}).Methods("PUT")
- rest.Handle(`/`, PutBlockHandler{kc, t}).Methods("POST")
- rest.Handle(`/{any}`, OptionsHandler{}).Methods("OPTIONS")
- rest.Handle(`/`, OptionsHandler{}).Methods("OPTIONS")
+ rest.HandleFunc(`/{locator:[0-9a-f]{32}\+.*}`, h.Put).Methods("PUT")
+ rest.HandleFunc(`/{locator:[0-9a-f]{32}}`, h.Put).Methods("PUT")
+ rest.HandleFunc(`/`, h.Put).Methods("POST")
+ rest.HandleFunc(`/{any}`, h.Options).Methods("OPTIONS")
+ rest.HandleFunc(`/`, h.Options).Methods("OPTIONS")
}
rest.NotFoundHandler = InvalidPathHandler{}
+ return h
+}
- return rest
+var errLoopDetected = errors.New("loop detected")
+
+func (*proxyHandler) checkLoop(resp http.ResponseWriter, req *http.Request) error {
+ if via := req.Header.Get("Via"); strings.Index(via, " "+viaAlias) >= 0 {
+ log.Printf("proxy loop detected (request has Via: %q): perhaps keepproxy is misidentified by gateway config as an external client, or its keep_services record does not have service_type=proxy?", via)
+ http.Error(resp, errLoopDetected.Error(), http.StatusInternalServerError)
+ return errLoopDetected
+ }
+ return nil
}
func SetCorsHeaders(resp http.ResponseWriter) {
resp.Header().Set("Access-Control-Max-Age", "86486400")
}
-func (this InvalidPathHandler) ServeHTTP(resp http.ResponseWriter, req *http.Request) {
+type InvalidPathHandler struct{}
+
+func (InvalidPathHandler) ServeHTTP(resp http.ResponseWriter, req *http.Request) {
log.Printf("%s: %s %s unroutable", GetRemoteAddress(req), req.Method, req.URL.Path)
http.Error(resp, "Bad request", http.StatusBadRequest)
}
-func (this OptionsHandler) ServeHTTP(resp http.ResponseWriter, req *http.Request) {
+func (h *proxyHandler) Options(resp http.ResponseWriter, req *http.Request) {
log.Printf("%s: %s %s", GetRemoteAddress(req), req.Method, req.URL.Path)
SetCorsHeaders(resp)
}
var removeHint, _ = regexp.Compile("\\+K@[a-z0-9]{5}(\\+|$)")
-func (this GetBlockHandler) ServeHTTP(resp http.ResponseWriter, req *http.Request) {
+func (h *proxyHandler) Get(resp http.ResponseWriter, req *http.Request) {
+ if err := h.checkLoop(resp, req); err != nil {
+ return
+ }
SetCorsHeaders(resp)
locator := mux.Vars(req)["locator"]
}
}()
- kc := *this.KeepClient
+ kc := *h.KeepClient
+ kc.Client = &proxyClient{client: kc.Client, proto: req.Proto}
var pass bool
var tok string
- if pass, tok = CheckAuthorizationHeader(kc, this.ApiTokenCache, req); !pass {
+ if pass, tok = CheckAuthorizationHeader(&kc, h.ApiTokenCache, req); !pass {
status, err = http.StatusForbidden, BadAuthorizationHeader
return
}
}
}
case keepclient.Error:
- if respErr.Error() == "Block not found" {
+ if respErr == keepclient.BlockNotFound {
status = http.StatusNotFound
} else if respErr.Temporary() {
status = http.StatusBadGateway
var LengthRequiredError = errors.New(http.StatusText(http.StatusLengthRequired))
var LengthMismatchError = errors.New("Locator size hint does not match Content-Length header")
-func (this PutBlockHandler) ServeHTTP(resp http.ResponseWriter, req *http.Request) {
+func (h *proxyHandler) Put(resp http.ResponseWriter, req *http.Request) {
+ if err := h.checkLoop(resp, req); err != nil {
+ return
+ }
SetCorsHeaders(resp)
- kc := *this.KeepClient
+ kc := *h.KeepClient
+ kc.Client = &proxyClient{client: kc.Client, proto: req.Proto}
+
var err error
- var expectLength int64 = -1
+ var expectLength int64
var status = http.StatusInternalServerError
var wroteReplicas int
var locatorOut string = "-"
locatorIn := mux.Vars(req)["locator"]
- if req.Header.Get("Content-Length") != "" {
- _, err := fmt.Sscanf(req.Header.Get("Content-Length"), "%d", &expectLength)
- if err != nil {
- resp.Header().Set("Content-Length", fmt.Sprintf("%d", expectLength))
- }
-
- }
-
- if expectLength < 0 {
+ _, err = fmt.Sscanf(req.Header.Get("Content-Length"), "%d", &expectLength)
+ if err != nil || expectLength < 0 {
err = LengthRequiredError
status = http.StatusLengthRequired
return
var pass bool
var tok string
- if pass, tok = CheckAuthorizationHeader(kc, this.ApiTokenCache, req); !pass {
+ if pass, tok = CheckAuthorizationHeader(&kc, h.ApiTokenCache, req); !pass {
err = BadAuthorizationHeader
status = http.StatusForbidden
return
if req.Header.Get("X-Keep-Desired-Replicas") != "" {
var r int
_, err := fmt.Sscanf(req.Header.Get(keepclient.X_Keep_Desired_Replicas), "%d", &r)
- if err != nil {
+ if err == nil {
kc.Want_replicas = r
}
}
// Tell the client how many successful PUTs we accomplished
resp.Header().Set(keepclient.X_Keep_Replicas_Stored, fmt.Sprintf("%d", wroteReplicas))
- switch err {
+ switch err.(type) {
case nil:
status = http.StatusOK
_, err = io.WriteString(resp, locatorOut)
// Expects "complete" response (terminating with blank new line)
// Aborts on any errors
// Concatenates responses from all those keep servers and returns
-func (handler IndexHandler) ServeHTTP(resp http.ResponseWriter, req *http.Request) {
+func (h *proxyHandler) Index(resp http.ResponseWriter, req *http.Request) {
SetCorsHeaders(resp)
prefix := mux.Vars(req)["prefix"]
}
}()
- kc := *handler.KeepClient
+ kc := *h.KeepClient
- ok, token := CheckAuthorizationHeader(kc, handler.ApiTokenCache, req)
+ ok, token := CheckAuthorizationHeader(&kc, h.ApiTokenCache, req)
if !ok {
status, err = http.StatusForbidden, BadAuthorizationHeader
return
projects / arvados.git / blobdiff