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main.go
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main.go
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package main
import (
"errors"
"flag"
"io"
"io/ioutil"
"os"
"os/signal"
"path/filepath"
"strconv"
"syscall"
"github.com/kenza-ai/kenza/logutil"
"github.com/kenza-ai/kenza/pubsub"
"github.com/kenza-ai/kenza/worker/job"
"github.com/kenza-ai/kenza/worker/job/handler"
"github.com/kenza-ai/kenza/worker/secrets"
"github.com/kenza-ai/kenza/worker/vcs"
)
var (
version string
)
const (
apiKeyLocation = "/run/secrets/api_key"
)
var (
apiKey string
logfile *os.File
j *job.Request
sec secrets.Store
pub *pubsub.RabbitMQ
sub *pubsub.RabbitMQ
)
var (
// Access to jobs "queued" for processing
queue = flag.String("queued_jobs_queue", "kenza.queue.jobs.ready", "Name of queue where jobs land on to be processed")
exchange = flag.String("queued_jobs_exchange", "kenza.exchange.jobs", "Name of exchange name where job update messages are published on")
rabbitMQPort = flag.Int64("rabbitmq_port", 5672, "RabbitMQ port")
rabbitMQHost = flag.String("rabbitmq_host", "pubsub", "RabbitMQ host")
rabbitMQUser = flag.String("rabbitmq_user", "guest", "RabbitMQ user")
rabbitMQPass = flag.String("rabbitmq_pass", "guest", "RabbitMQ password")
// Job artifacts locations
workDir = flag.String("work_dir", os.TempDir(), "Where the repo will be cloned")
logfileDir = flag.String("logfile_dir", "", "Path where job logs are written")
)
func init() {
setupLog()
}
func main() {
defer cleanup()
flag.Parse()
setupGracefulShutdown()
setupAPIKey()
setupPubSub()
setupAPIClient()
listenAndHandle(setupHandlers())
}
func setupLog() {
logutil.Init(os.Stderr, os.Stderr, "worker", version)
}
func setupLogfile(jobID, projectID int64) {
var err error
logfilePath := filepath.Join(*logfileDir, strconv.FormatInt(projectID, 10)+"-"+strconv.FormatInt(jobID, 10)+".log")
logfile, err = os.OpenFile(logfilePath, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
if err != nil {
e("could not create log file at '%s' — logging to stdout only. %s", *logfileDir, err)
} else {
i("created log file at '%s'", logfilePath)
mw := io.MultiWriter(os.Stdout, logfile)
logutil.SetOutputErr(mw)
logutil.SetOutputInfo(mw)
}
}
func listenAndHandle(h []job.ChainHandler) {
j = job.New(*exchange, *queue, pub, sub)
if err := j.Poll(); err != nil {
panic(err)
}
i("Creating log file for job %+v", j.JobQueued.JobID)
setupLogfile(j.JobQueued.JobID, j.JobQueued.ProjectID)
if len(h) > 0 {
h[0].Handle(j)
}
}
func setupAPIClient() {
var err error
sec, err = secrets.NewSecretsClient(apiKey, "v1", version)
if err != nil {
panic(err)
}
}
func setupPubSub() {
var err error
pub, err = pubsub.NewRabbitMQ(*exchange, *rabbitMQUser, *rabbitMQPass, *rabbitMQHost, *rabbitMQPort, 10)
if err != nil {
panic(err)
}
sub, err = pubsub.NewRabbitMQ(*exchange, *rabbitMQUser, *rabbitMQPass, *rabbitMQHost, *rabbitMQPort, 10)
if err != nil {
panic(err)
}
}
func setupHandlers() []job.ChainHandler {
arrival := handler.NewArrival(*workDir)
versionControl := handler.NewVCS(&vcs.Git{}, sec)
service := handler.NewService()
return chainHandlers(arrival, versionControl, service)
}
func setupGracefulShutdown() {
c := make(chan os.Signal, 1) // Catch various termination signals on channel c
signal.Notify(c, os.Interrupt, os.Kill, syscall.SIGTERM, syscall.SIGQUIT)
go func() {
for sig := range c {
i("received signal: %s", sig.String())
if j != nil {
j.Fail(errors.New(sig.String()))
}
cleanup()
}
}()
}
func setupAPIKey() {
var err error
apiKeyData, err := ioutil.ReadFile(apiKeyLocation)
if err != nil {
panic(err)
}
apiKey = string(apiKeyData)
}