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main.go
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main.go
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// Copyright 2017 Capsule8, Inc.
//
// 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.
package main
import (
"context"
"flag"
"fmt"
"log"
"net"
"os"
"os/signal"
"strings"
"time"
"golang.org/x/sys/unix"
"google.golang.org/grpc"
telemetryAPI "github.com/Happyholic1203/capsule8/api/v0"
sensorConfig "github.com/Happyholic1203/capsule8/pkg/config"
"github.com/Happyholic1203/capsule8/pkg/sensor"
"github.com/Happyholic1203/capsule8/pkg/services"
"github.com/golang/glog"
"github.com/Happyholic1203/capsule8/pkg/version"
)
var config struct {
endpoint string
image string
verbose bool
}
var (
testSensor *sensor.Sensor
manager *services.ServiceManager
)
func init() {
flag.StringVar(&config.endpoint, "endpoint",
"unix:/var/run/capsule8/sensor.sock",
"Capsule8 gRPC API endpoint")
flag.StringVar(&config.image, "image", "",
"container image wildcard pattern to monitor")
flag.BoolVar(&config.verbose, "verbose", false,
"verbose (print events received)")
}
// Custom gRPC Dialer that understands "unix:/path/to/sock" as well as TCP addrs
func dialer(addr string, timeout time.Duration) (net.Conn, error) {
var network, address string
parts := strings.Split(addr, ":")
if len(parts) > 1 && parts[0] == "unix" {
network = "unix"
address = parts[1]
} else {
network = "tcp"
address = addr
}
return net.DialTimeout(network, address, timeout)
}
func createSubscription() *telemetryAPI.Subscription {
processEvents := []*telemetryAPI.ProcessEventFilter{
//
// Get all process lifecycle events
//
&telemetryAPI.ProcessEventFilter{
Type: telemetryAPI.ProcessEventType_PROCESS_EVENT_TYPE_FORK,
},
&telemetryAPI.ProcessEventFilter{
Type: telemetryAPI.ProcessEventType_PROCESS_EVENT_TYPE_EXEC,
},
&telemetryAPI.ProcessEventFilter{
Type: telemetryAPI.ProcessEventType_PROCESS_EVENT_TYPE_EXIT,
},
}
containerEvents := []*telemetryAPI.ContainerEventFilter{
&telemetryAPI.ContainerEventFilter{
Type: telemetryAPI.ContainerEventType_CONTAINER_EVENT_TYPE_RUNNING,
},
&telemetryAPI.ContainerEventFilter{
Type: telemetryAPI.ContainerEventType_CONTAINER_EVENT_TYPE_EXITED,
},
}
eventFilter := &telemetryAPI.EventFilter{
ProcessEvents: processEvents,
ContainerEvents: containerEvents,
}
sub := &telemetryAPI.Subscription{
EventFilter: eventFilter,
}
if config.image != "" {
fmt.Fprintf(os.Stderr,
"Watching for container images matching %s\n",
config.image)
containerFilter := &telemetryAPI.ContainerFilter{}
containerFilter.ImageNames =
append(containerFilter.ImageNames, config.image)
sub.ContainerFilter = containerFilter
}
return sub
}
var subscriptionEvents int64
var startSubEvents int64
var startMetrics map[string]sensor.MetricsCounters
var startRusage map[string]unix.Rusage
func onContainerRunning(cID string) {
var rusage unix.Rusage
if startMetrics == nil {
startMetrics = make(map[string]sensor.MetricsCounters)
}
startMetrics[cID] = testSensor.Metrics
startSubEvents = subscriptionEvents
err := unix.Getrusage(unix.RUSAGE_SELF, &rusage)
if err != nil {
log.Fatal(err)
}
if startRusage == nil {
startRusage = make(map[string]unix.Rusage)
}
startRusage[cID] = rusage
}
func max(x, y int64) int64 {
if x > y {
return x
}
return y
}
func onContainerExited(cID string) {
var metricsStart, metricsEnd, metricsDelta sensor.MetricsCounters
metricsEnd = testSensor.Metrics
metricsStart = startMetrics[cID]
metricsDelta.Events = metricsEnd.Events - metricsStart.Events
metricsDelta.Subscriptions = uint64(max(int64(metricsEnd.Subscriptions),
int64(metricsStart.Subscriptions)))
var rusage, delta unix.Rusage
err := unix.Getrusage(unix.RUSAGE_SELF, &rusage)
if err != nil {
log.Fatal(err)
}
start := startRusage[cID]
startTotalUserUsec := (start.Utime.Sec * 1000000) + start.Utime.Usec
startTotalSysUsec := (start.Stime.Sec * 1000000) + start.Stime.Usec
stopTotalUserUsec := (rusage.Utime.Sec * 1000000) + rusage.Utime.Usec
stopTotalSysUsec := (rusage.Stime.Sec * 1000000) + rusage.Stime.Usec
deltaTotalUserUsec := stopTotalUserUsec - startTotalUserUsec
deltaTotalSysUsec := stopTotalSysUsec - startTotalSysUsec
delta.Utime.Sec = deltaTotalUserUsec / 1000000
delta.Utime.Usec = deltaTotalUserUsec % 1000000
delta.Stime.Sec = deltaTotalSysUsec / 1000000
delta.Stime.Usec = deltaTotalSysUsec % 1000000
delta.Maxrss = max(rusage.Maxrss, start.Maxrss)
delta.Minflt = rusage.Minflt - start.Minflt
delta.Majflt = rusage.Majflt - start.Majflt
delta.Inblock = rusage.Inblock - start.Inblock
delta.Oublock = rusage.Oublock - start.Oublock
delta.Nvcsw = rusage.Nvcsw - start.Nvcsw
delta.Nivcsw = rusage.Nivcsw - start.Nivcsw
nEvents := subscriptionEvents - startSubEvents
usecsPerEvent := deltaTotalUserUsec / nEvents
ssecsPerEvent := deltaTotalSysUsec / nEvents
fmt.Printf("%s Events:%d avg_user_us_per_event:%d avg_sys_us_per_event:%d %+v %+v\n",
cID, nEvents, usecsPerEvent, ssecsPerEvent,
metricsDelta, delta)
}
func main() {
// Set "alsologtostderr" flag so that glog messages go stderr as well as /tmp.
//flag.Set("alsologtostderr", "true")
flag.Parse()
// Enable profiling by default
sensorConfig.Global.ProfilingListenAddr = ":6060"
// Log version and build at "Starting ..." for debugging
version.InitialBuildLog("benchmark")
manager = services.NewServiceManager()
if len(sensorConfig.Sensor.ListenAddr) > 0 {
var err error
testSensor, err = sensor.NewSensor()
if err != nil {
glog.Fatalf("Could not create sensor: %s", err)
}
if err = testSensor.Start(); err != nil {
glog.Fatalf("Could not start sensor: %s", err)
}
defer testSensor.Stop()
service := sensor.NewTelemetryService(testSensor,
sensorConfig.Sensor.ListenAddr)
manager.RegisterService(service)
}
go func() {
manager.Run()
}()
time.Sleep(1 * time.Second)
// Create telemetry service client
conn, err := grpc.Dial(config.endpoint,
grpc.WithDialer(dialer),
grpc.WithInsecure())
c := telemetryAPI.NewTelemetryServiceClient(conn)
if err != nil {
fmt.Fprintf(os.Stderr, "grpc.Dial: %s\n", err)
os.Exit(1)
}
ctx, cancel := context.WithCancel(context.Background())
stream, err := c.GetEvents(ctx, &telemetryAPI.GetEventsRequest{
Subscription: createSubscription(),
})
if err != nil {
fmt.Fprintf(os.Stderr, "GetEvents: %s\n", err)
os.Exit(1)
}
// Exit cleanly on Control-C
signals := make(chan os.Signal)
signal.Notify(signals, os.Interrupt)
go func() {
<-signals
cancel()
}()
for {
var response *telemetryAPI.GetEventsResponse
response, err = stream.Recv()
if err != nil {
fmt.Fprintf(os.Stderr, "Recv: %s\n", err)
os.Exit(1)
}
for _, event := range response.Events {
e := event.Event
if config.verbose {
fmt.Printf("%+v\n", e)
}
switch x := e.Event.(type) {
case *telemetryAPI.TelemetryEvent_Container:
switch x.Container.GetType() {
case telemetryAPI.ContainerEventType_CONTAINER_EVENT_TYPE_RUNNING:
onContainerRunning(e.ContainerId)
case telemetryAPI.ContainerEventType_CONTAINER_EVENT_TYPE_EXITED:
onContainerExited(e.ContainerId)
}
}
subscriptionEvents++
}
}
}