108 lines
2.3 KiB
Go
108 lines
2.3 KiB
Go
package gounicorn
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import (
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"net/http"
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"os"
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"os/exec"
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"runtime"
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"syscall"
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"time"
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log "github.com/sirupsen/logrus"
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"goauthentik.io/internal/outpost/ak"
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)
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type GoUnicorn struct {
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HealthyCallback func()
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log *log.Entry
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p *exec.Cmd
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started bool
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killed bool
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alive bool
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}
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func NewGoUnicorn() *GoUnicorn {
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logger := log.WithField("logger", "authentik.router.unicorn")
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g := &GoUnicorn{
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log: logger,
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started: false,
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killed: false,
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alive: false,
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HealthyCallback: func() {},
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}
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g.initCmd()
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return g
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}
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func (g *GoUnicorn) initCmd() {
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command := "gunicorn"
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args := []string{"-c", "./lifecycle/gunicorn.conf.py", "authentik.root.asgi.app:application"}
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g.log.WithField("args", args).WithField("cmd", command).Debug("Starting gunicorn")
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g.p = exec.Command(command, args...)
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g.p.Env = os.Environ()
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g.p.Stdout = os.Stdout
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g.p.Stderr = os.Stderr
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}
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func (g *GoUnicorn) IsRunning() bool {
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return g.alive
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}
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func (g *GoUnicorn) Start() error {
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if g.killed {
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g.log.Debug("Not restarting gunicorn since we're shutdown")
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return nil
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}
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if g.started {
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g.initCmd()
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}
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g.started = true
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go g.healthcheck()
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return g.p.Run()
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}
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func (g *GoUnicorn) healthcheck() {
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g.log.Debug("starting healthcheck")
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h := &http.Client{
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Transport: ak.NewUserAgentTransport("goauthentik.io go proxy healthcheck", http.DefaultTransport),
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}
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check := func() bool {
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res, err := h.Get("http://localhost:8000/-/health/live/")
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if err == nil && res.StatusCode == 204 {
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g.alive = true
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return true
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}
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return false
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}
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// Default healthcheck is every 1 second on startup
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// once we've been healthy once, increase to 30 seconds
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for range time.Tick(time.Second) {
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if check() {
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g.log.Info("backend is alive, backing off with healthchecks")
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g.HealthyCallback()
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break
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}
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g.log.Debug("backend not alive yet")
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}
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for range time.Tick(30 * time.Second) {
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check()
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}
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}
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func (g *GoUnicorn) Kill() {
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g.killed = true
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var err error
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if runtime.GOOS == "darwin" {
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g.log.WithField("method", "kill").Warning("stopping gunicorn")
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err = g.p.Process.Kill()
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} else {
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g.log.WithField("method", "sigterm").Warning("stopping gunicorn")
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err = syscall.Kill(g.p.Process.Pid, syscall.SIGTERM)
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}
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if err != nil {
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g.log.WithError(err).Warning("failed to stop gunicorn")
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}
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}
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