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runtime.go
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runtime.go
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// Copyright 2018-2021 CERN
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// In applying this license, CERN does not waive the privileges and immunities
// granted to it by virtue of its status as an Intergovernmental Organization
// or submit itself to any jurisdiction.
package runtime
import (
"fmt"
"log"
"net"
"os"
"runtime"
"strconv"
"strings"
"github.com/cs3org/reva/v2/cmd/revad/internal/grace"
"github.com/cs3org/reva/v2/pkg/logger"
"github.com/cs3org/reva/v2/pkg/registry"
"github.com/cs3org/reva/v2/pkg/rgrpc"
"github.com/cs3org/reva/v2/pkg/rhttp"
"github.com/cs3org/reva/v2/pkg/sharedconf"
rtrace "github.com/cs3org/reva/v2/pkg/trace"
"github.com/mitchellh/mapstructure"
"github.com/pkg/errors"
"github.com/rs/zerolog"
"go.opentelemetry.io/otel/trace"
)
// Run runs a reva server with the given config file and pid file.
func Run(mainConf map[string]interface{}, pidFile, logLevel string) {
log := logger.InitLoggerOrDie(mainConf["log"], logLevel)
RunWithOptions(mainConf, pidFile, WithLogger(log))
}
// RunWithOptions runs a reva server with the given config file, pid file and options.
func RunWithOptions(mainConf map[string]interface{}, pidFile string, opts ...Option) {
options := newOptions(opts...)
parseSharedConfOrDie(mainConf["shared"])
coreConf := parseCoreConfOrDie(mainConf["core"])
if err := registry.Init(options.Registry); err != nil {
panic(err)
}
run(mainConf, coreConf, options.Logger, options.TraceProvider, pidFile)
}
type coreConf struct {
MaxCPUs string `mapstructure:"max_cpus"`
TracingEnabled bool `mapstructure:"tracing_enabled"`
TracingInsecure bool `mapstructure:"tracing_insecure"`
TracingExporter string `mapstructure:"tracing_exporter"`
TracingEndpoint string `mapstructure:"tracing_endpoint"`
TracingCollector string `mapstructure:"tracing_collector"`
TracingServiceName string `mapstructure:"tracing_service_name"`
// TracingService specifies the service. i.e OpenCensus, OpenTelemetry, OpenTracing...
TracingService string `mapstructure:"tracing_service"`
GracefulShutdownTimeout int `mapstructure:"graceful_shutdown_timeout"`
}
func run(
mainConf map[string]interface{},
coreConf *coreConf,
logger *zerolog.Logger,
tp trace.TracerProvider,
filename string,
) {
host, _ := os.Hostname()
logger.Info().Msgf("host info: %s", host)
// Only initialise tracing if we didn't get a tracer provider.
if tp == nil {
logger.Debug().Msg("No pre-existing tracer given, initializing tracing")
tp = initTracing(coreConf)
}
initCPUCount(coreConf, logger)
servers := initServers(mainConf, logger, tp)
watcher, err := initWatcher(logger, filename, coreConf.GracefulShutdownTimeout)
if err != nil {
log.Panic(err)
}
listeners := initListeners(watcher, servers, logger)
start(mainConf, servers, listeners, logger, watcher)
}
func initListeners(watcher *grace.Watcher, servers map[string]grace.Server, log *zerolog.Logger) map[string]net.Listener {
listeners, err := watcher.GetListeners(servers)
if err != nil {
log.Error().Err(err).Msg("error getting sockets")
watcher.Exit(1)
}
return listeners
}
func initWatcher(log *zerolog.Logger, filename string, gracefulShutdownTimeout int) (*grace.Watcher, error) {
watcher, err := handlePIDFlag(log, filename, gracefulShutdownTimeout)
// TODO(labkode): maybe pidfile can be created later on? like once a server is going to be created?
if err != nil {
log.Error().Err(err).Msg("error creating grace watcher")
os.Exit(1)
}
return watcher, err
}
func initServers(mainConf map[string]interface{}, log *zerolog.Logger, tp trace.TracerProvider) map[string]grace.Server {
servers := map[string]grace.Server{}
if isEnabledHTTP(mainConf) {
s, err := getHTTPServer(mainConf["http"], log, tp)
if err != nil {
log.Error().Err(err).Msg("error creating http server")
os.Exit(1)
}
servers["http"] = s
}
if isEnabledGRPC(mainConf) {
s, err := getGRPCServer(mainConf["grpc"], log, tp)
if err != nil {
log.Error().Err(err).Msg("error creating grpc server")
os.Exit(1)
}
servers["grpc"] = s
}
if len(servers) == 0 {
log.Info().Msg("nothing to do, no grpc/http enabled_services declared in config")
os.Exit(1)
}
return servers
}
func initTracing(conf *coreConf) trace.TracerProvider {
if conf.TracingEnabled {
opts := []rtrace.Option{
rtrace.WithExporter(conf.TracingExporter),
rtrace.WithEndpoint(conf.TracingEndpoint),
rtrace.WithCollector(conf.TracingCollector),
rtrace.WithServiceName(conf.TracingServiceName),
}
if conf.TracingEnabled {
opts = append(opts, rtrace.WithEnabled())
}
if conf.TracingInsecure {
opts = append(opts, rtrace.WithInsecure())
}
tp := rtrace.NewTracerProvider(opts...)
rtrace.SetDefaultTracerProvider(tp)
return tp
}
return rtrace.DefaultProvider()
}
func initCPUCount(conf *coreConf, log *zerolog.Logger) {
ncpus, err := adjustCPU(conf.MaxCPUs)
if err != nil {
log.Error().Err(err).Msg("error adjusting number of cpus")
os.Exit(1)
}
// log.Info().Msgf("%s", getVersionString())
log.Info().Msgf("running on %d cpus", ncpus)
}
func handlePIDFlag(l *zerolog.Logger, pidFile string, gracefulShutdownTimeout int) (*grace.Watcher, error) {
w := grace.NewWatcher(grace.WithPIDFile(pidFile),
grace.WithLogger(l.With().Str("pkg", "grace").Logger()),
grace.WithGracefuleShutdownTimeout(gracefulShutdownTimeout),
)
err := w.WritePID()
if err != nil {
return nil, err
}
return w, nil
}
func start(mainConf map[string]interface{}, servers map[string]grace.Server, listeners map[string]net.Listener, log *zerolog.Logger, watcher *grace.Watcher) {
if isEnabledHTTP(mainConf) {
go func() {
if err := servers["http"].(*rhttp.Server).Start(listeners["http"]); err != nil {
log.Error().Err(err).Msg("error starting the http server")
watcher.Exit(1)
}
}()
}
if isEnabledGRPC(mainConf) {
go func() {
if err := servers["grpc"].(*rgrpc.Server).Start(listeners["grpc"]); err != nil {
log.Error().Err(err).Msg("error starting the grpc server")
watcher.Exit(1)
}
}()
}
watcher.TrapSignals()
}
func getGRPCServer(conf interface{}, l *zerolog.Logger, tp trace.TracerProvider) (*rgrpc.Server, error) {
sub := l.With().Str("pkg", "rgrpc").Logger()
s, err := rgrpc.NewServer(conf, sub, tp)
if err != nil {
err = errors.Wrap(err, "main: error creating grpc server")
return nil, err
}
return s, nil
}
func getHTTPServer(conf interface{}, l *zerolog.Logger, tp trace.TracerProvider) (*rhttp.Server, error) {
sub := l.With().Str("pkg", "rhttp").Logger()
s, err := rhttp.New(conf, sub, tp)
if err != nil {
err = errors.Wrap(err, "main: error creating http server")
return nil, err
}
return s, nil
}
// adjustCPU parses string cpu and sets GOMAXPROCS
// according to its value. It accepts either
// a number (e.g. 3) or a percent (e.g. 50%).
// Default is to use all available cores.
func adjustCPU(cpu string) (int, error) {
var numCPU int
availCPU := runtime.NumCPU()
if cpu != "" {
if strings.HasSuffix(cpu, "%") {
// Percent
var percent float32
pctStr := cpu[:len(cpu)-1]
pctInt, err := strconv.Atoi(pctStr)
if err != nil || pctInt < 1 || pctInt > 100 {
return 0, fmt.Errorf("invalid CPU value: percentage must be between 1-100")
}
percent = float32(pctInt) / 100
numCPU = int(float32(availCPU) * percent)
} else {
// Number
num, err := strconv.Atoi(cpu)
if err != nil || num < 1 {
return 0, fmt.Errorf("invalid CPU value: provide a number or percent greater than 0")
}
numCPU = num
}
} else {
numCPU = availCPU
}
if numCPU > availCPU || numCPU == 0 {
numCPU = availCPU
}
runtime.GOMAXPROCS(numCPU)
return numCPU, nil
}
func parseCoreConfOrDie(v interface{}) *coreConf {
c := &coreConf{}
if err := mapstructure.Decode(v, c); err != nil {
fmt.Fprintf(os.Stderr, "error decoding core config: %s\n", err.Error())
os.Exit(1)
}
// tracing defaults to enabled if not explicitly configured
if v == nil {
c.TracingEnabled = true
c.TracingEndpoint = "localhost:6831"
} else if _, ok := v.(map[string]interface{})["tracing_enabled"]; !ok {
c.TracingEnabled = true
c.TracingEndpoint = "localhost:6831"
}
return c
}
func parseSharedConfOrDie(v interface{}) {
if err := sharedconf.Decode(v); err != nil {
fmt.Fprintf(os.Stderr, "error decoding shared config: %s\n", err.Error())
os.Exit(1)
}
}
func isEnabledHTTP(conf map[string]interface{}) bool {
return isEnabled("http", conf)
}
func isEnabledGRPC(conf map[string]interface{}) bool {
return isEnabled("grpc", conf)
}
func isEnabled(key string, conf map[string]interface{}) bool {
if a, ok := conf[key]; ok {
if b, ok := a.(map[string]interface{}); ok {
if c, ok := b["services"]; ok {
if d, ok := c.(map[string]interface{}); ok {
if len(d) > 0 {
return true
}
}
}
}
}
return false
}