/
main.go
206 lines (172 loc) · 6.33 KB
/
main.go
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package main
import (
"encoding/json"
"fmt"
"log"
"net/http"
"os"
"strconv"
"strings"
"time"
"github.com/alphagov/paas-cf/tools/metrics/pkg/health"
"github.com/alphagov/paas-cf/tools/metrics/pkg/shield"
"github.com/aws/aws-sdk-go/aws"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/promhttp"
"github.com/alphagov/paas-cf/tools/metrics/pkg/pingdumb"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/aws/aws-sdk-go/service/costexplorer"
"github.com/pkg/errors"
"code.cloudfoundry.org/lager"
"github.com/alphagov/paas-cf/tools/metrics/pkg/aiven"
"github.com/alphagov/paas-cf/tools/metrics/pkg/cloudfront"
"github.com/alphagov/paas-cf/tools/metrics/pkg/cloudwatch"
"github.com/alphagov/paas-cf/tools/metrics/pkg/debug"
"github.com/alphagov/paas-cf/tools/metrics/pkg/elasticache"
m "github.com/alphagov/paas-cf/tools/metrics/pkg/metrics"
promrep "github.com/alphagov/paas-cf/tools/metrics/pkg/prometheus_reporter"
"github.com/alphagov/paas-cf/tools/metrics/pkg/rds"
"github.com/alphagov/paas-cf/tools/metrics/pkg/s3"
"github.com/alphagov/paas-cf/tools/metrics/pkg/servicequotas"
"github.com/alphagov/paas-cf/tools/metrics/pkg/tlscheck"
)
func getHTTPPort() int {
portStr := os.Getenv("PORT")
if portStr != "" {
port, err := strconv.Atoi(portStr)
if err != nil {
log.Fatalln("PORT is invalid")
return 0
}
return port
}
return 8080
}
func runHTTPServer(port int, metricsHandler http.Handler) {
addr := fmt.Sprintf(":%d", port)
http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Cache-Control", "max-age=0,no-store,no-cache")
w.Header().Set("Content-Type", "application/json")
json.NewEncoder(w).Encode(struct {
OK bool
}{
OK: true,
})
})
http.Handle("/metrics", metricsHandler)
go http.ListenAndServe(addr, nil)
}
func Main() error {
prometheusRegistry := prometheus.NewRegistry()
prometheusHandler := promhttp.HandlerFor(
prometheusRegistry,
promhttp.HandlerOpts{},
)
runHTTPServer(getHTTPPort(), prometheusHandler)
// create a logger
logger := lager.NewLogger("metrics")
logLevel := lager.INFO
if os.Getenv("LOG_LEVEL") == "0" {
logLevel = lager.DEBUG
}
logger.RegisterSink(lager.NewWriterSink(os.Stdout, logLevel))
// create a client ("github.com/alphagov/paas-cf/tools/metrics/client.go Client")
cfConfig := ClientConfig{
ApiAddress: os.Getenv("CF_API_ADDRESS"),
ClientID: os.Getenv("CF_CLIENT_ID"),
ClientSecret: os.Getenv("CF_CLIENT_SECRET"),
Logger: logger,
}
c, err := NewClient(cfConfig)
if err != nil {
return errors.Wrap(err, "failed to connect to cloud foundry api")
}
// create a CloudFoundry client instance
cfAPI, err := NewCFClient(cfConfig)
if err != nil {
return errors.Wrap(err, "failed to connect to cloud foundry api")
}
uaaCfg := UAAClientConfig{
Endpoint: os.Getenv("UAA_ENDPOINT"),
ClientID: os.Getenv("CF_CLIENT_ID"),
ClientSecret: os.Getenv("CF_CLIENT_SECRET"),
}
a, err := aiven.NewClient(
os.Getenv("AIVEN_PROJECT"),
os.Getenv("AIVEN_API_TOKEN"),
)
if err != nil {
return errors.Wrap(err, "failed to get Aiven connection data")
}
sess, err := session.NewSession()
if err != nil {
return errors.Wrap(err, "failed to connect to AWS API")
}
awsRegion := *sess.Config.Region
if awsRegion != "eu-west-1" && awsRegion != "eu-west-2" {
return fmt.Errorf("unexpected aws region %s", awsRegion)
}
cfs := cloudfront.NewService(sess)
tlsChecker := &tlscheck.TLSChecker{}
ecs := elasticache.NewService(sess)
s3 := s3.NewService(sess)
usEast1Sess, err := session.NewSession(&aws.Config{Region: aws.String("us-east-1")})
if err != nil {
return errors.Wrap(err, "failed to connect to AWS API in US East 1")
}
cloudWatch := cloudwatch.NewService(usEast1Sess, logger)
costExplorer := costexplorer.New(sess)
serviceQuotas := servicequotas.NewService(sess)
rdsService := rds.NewService(sess)
healthService := health.NewService(sess)
shieldService := shield.NewService(sess)
// Combine all metrics into single stream
gauges := []m.MetricReader{
AppCountGauge(c, 5*time.Minute), // poll number of apps
ServiceCountGauge(c, 5*time.Minute), // poll number of provisioned services
OrgCountGauge(c, 5*time.Minute), // poll number of orgs
SpaceCountGauge(c, 5*time.Minute), // poll number of spaces
UserCountGauge(c, 5*time.Minute), // poll number of users
QuotaGauge(c, 5*time.Minute), // poll quota usage
AivenCostGauge(a, 5*time.Minute), // poll aiven cost
EventCountGauge(c, "app.crash", 10*time.Minute), // count number of times an event is seen within the interval
ELBNodeFailureCountGauge(logger, pingdumb.ReportConfig{
Target: os.Getenv("ELB_ADDRESS"),
Timeout: 5 * time.Second,
}, 30*time.Second),
CDNTLSValidityGauge(logger, tlsChecker, cfs, 1*time.Hour),
CDNTLSCertificateAuthorityGauge(logger, tlsChecker, cfs, 1*time.Hour),
ElasticacheInstancesGauge(logger, ecs, cfAPI, 5*time.Minute),
ElasticacheUpdatesGauge(logger, ecs, cfAPI, 5*time.Minute),
S3BucketsGauge(logger, s3, 1*time.Hour),
CustomDomainCDNMetricsCollector(logger, cfs, cloudWatch, 10*time.Minute),
AWSCostExplorerGauge(logger, awsRegion, costExplorer, 6*time.Hour),
UAAGauges(logger, &uaaCfg, 5*time.Minute),
RDSDBInstancesGauge(logger, rdsService, serviceQuotas, 15*time.Minute),
RDSDBManualSnapshotsGauge(logger, rdsService, serviceQuotas, 15*time.Minute),
AWSHealthEventsGauge(logger, awsRegion, healthService, 15*time.Minute),
ShieldOngoingAttacksGauge(logger, shieldService, 5*time.Minute),
CloudfrontDistributionInstancesGauge(logger, cfs, 15*time.Minute),
}
for _, addr := range strings.Split(os.Getenv("TLS_DOMAINS"), ",") {
gauges = append(gauges, TLSValidityGauge(logger, tlsChecker, strings.TrimSpace(addr), 15*time.Minute))
}
metrics := m.NewMultiMetricReader(gauges...)
defer metrics.Close()
prometheusReporter := promrep.NewPrometheusReporter(prometheusRegistry)
multiWriter := m.NewMultiMetricWriter(prometheusReporter)
if os.Getenv("DEBUG") == "1" {
multiWriter.AddWriter(debug.StdOutWriter{})
}
for {
if err := m.CopyMetrics(multiWriter, metrics); err != nil {
logger.Error("error-streaming-metrics", err)
}
}
}
func main() {
if err := Main(); err != nil {
log.Fatal(err)
}
fmt.Println("shutdown gracefully")
}