5 files changed, 402 insertions, 0 deletions
diff --git a/plugins/checker/config.go b/plugins/checker/config.go
new file mode 100644
index 00000000..5f952592
--- /dev/null
+++ b/plugins/checker/config.go
@@ -0,0 +1,5 @@
+package checker
+
+type Config struct {
+	Address string
+}
diff --git a/plugins/checker/plugin.go b/plugins/checker/plugin.go
new file mode 100644
index 00000000..e6250697
--- /dev/null
+++ b/plugins/checker/plugin.go
@@ -0,0 +1,152 @@
+package checker
+
+import (
+	"fmt"
+	"net/http"
+	"time"
+
+	"github.com/gofiber/fiber/v2"
+	"github.com/gofiber/fiber/v2/middleware/logger"
+	"github.com/spiral/endure"
+	"github.com/spiral/errors"
+	"github.com/spiral/roadrunner/v2/interfaces/log"
+	"github.com/spiral/roadrunner/v2/interfaces/status"
+	"github.com/spiral/roadrunner/v2/plugins/config"
+)
+
+const (
+	// PluginName declares public plugin name.
+	PluginName = "status"
+)
+
+type Plugin struct {
+	registry map[string]status.Checker
+	server   *fiber.App
+	log      log.Logger
+	cfg      *Config
+}
+
+func (c *Plugin) Init(log log.Logger, cfg config.Configurer) error {
+	const op = errors.Op("status plugin init")
+	err := cfg.UnmarshalKey(PluginName, &c.cfg)
+	if err != nil {
+		return errors.E(op, errors.Disabled, err)
+	}
+
+	if c.cfg == nil {
+		return errors.E(errors.Disabled)
+	}
+
+	c.registry = make(map[string]status.Checker)
+	c.log = log
+	return nil
+}
+
+func (c *Plugin) Serve() chan error {
+	errCh := make(chan error, 1)
+	c.server = fiber.New(fiber.Config{
+		ReadTimeout:  time.Second * 5,
+		WriteTimeout: time.Second * 5,
+		IdleTimeout:  time.Second * 5,
+	})
+	c.server.Group("/v1", c.healthHandler)
+	c.server.Use(logger.New())
+	c.server.Use("/health", c.healthHandler)
+
+	go func() {
+		err := c.server.Listen(c.cfg.Address)
+		if err != nil {
+			errCh <- err
+		}
+	}()
+
+	return errCh
+}
+
+func (c *Plugin) Stop() error {
+	const op = errors.Op("checker stop")
+	err := c.server.Shutdown()
+	if err != nil {
+		return errors.E(op, err)
+	}
+	return nil
+}
+
+// Reset named service.
+func (c *Plugin) Status(name string) (status.Status, error) {
+	const op = errors.Op("get status")
+	svc, ok := c.registry[name]
+	if !ok {
+		return status.Status{}, errors.E(op, errors.Errorf("no such service: %s", name))
+	}
+
+	return svc.Status(), nil
+}
+
+// CollectTarget collecting services which can provide Status.
+func (c *Plugin) CollectTarget(name endure.Named, r status.Checker) error {
+	c.registry[name.Name()] = r
+	return nil
+}
+
+// Collects declares services to be collected.
+func (c *Plugin) Collects() []interface{} {
+	return []interface{}{
+		c.CollectTarget,
+	}
+}
+
+// Name of the service.
+func (c *Plugin) Name() string {
+	return PluginName
+}
+
+// RPCService returns associated rpc service.
+func (c *Plugin) RPC() interface{} {
+	return &rpc{srv: c, log: c.log}
+}
+
+type Plugins struct {
+	Plugins []string `query:"plugin"`
+}
+
+const template string = "Service: %s: Status: %d\n"
+
+func (c *Plugin) healthHandler(ctx *fiber.Ctx) error {
+	const op = errors.Op("health_handler")
+	plugins := &Plugins{}
+	err := ctx.QueryParser(plugins)
+	if err != nil {
+		return errors.E(op, err)
+	}
+
+	if len(plugins.Plugins) == 0 {
+		ctx.Status(http.StatusOK)
+		_, _ = ctx.WriteString("No plugins provided in query. Query should be in form of: /v1/health?plugin=plugin1&plugin=plugin2 \n")
+		return nil
+	}
+
+	failed := false
+	// iterate over all provided plugins
+	for i := 0; i < len(plugins.Plugins); i++ {
+		// check if the plugin exists
+		if plugin, ok := c.registry[plugins.Plugins[i]]; ok {
+			st := plugin.Status()
+			if st.Code >= 500 {
+				failed = true
+				continue
+			} else if st.Code >= 100 && st.Code <= 400 {
+				_, _ = ctx.WriteString(fmt.Sprintf(template, plugins.Plugins[i], st.Code))
+			}
+		} else {
+			_, _ = ctx.WriteString(fmt.Sprintf("Service: %s not found", plugins.Plugins[i]))
+		}
+	}
+	if failed {
+		ctx.Status(http.StatusInternalServerError)
+		return nil
+	}
+
+	ctx.Status(http.StatusOK)
+	return nil
+}
diff --git a/plugins/checker/rpc.go b/plugins/checker/rpc.go
new file mode 100644
index 00000000..d03d1638
--- /dev/null
+++ b/plugins/checker/rpc.go
@@ -0,0 +1,28 @@
+package checker
+
+import (
+	"github.com/spiral/errors"
+	"github.com/spiral/roadrunner/v2/interfaces/log"
+	"github.com/spiral/roadrunner/v2/interfaces/status"
+)
+
+type rpc struct {
+	srv *Plugin
+	log log.Logger
+}
+
+// Status return current status of the provided plugin
+func (rpc *rpc) Status(service string, status *status.Status) error {
+	const op = errors.Op("status")
+	rpc.log.Debug("started Status method", "service", service)
+	st, err := rpc.srv.Status(service)
+	if err != nil {
+		return errors.E(op, err)
+	}
+
+	*status = st
+
+	rpc.log.Debug("status code", "code", st.Code)
+	rpc.log.Debug("successfully finished Status method")
+	return nil
+}
diff --git a/plugins/checker/tests/configs/.rr-checker-init.yaml b/plugins/checker/tests/configs/.rr-checker-init.yaml
new file mode 100755
index 00000000..5943551b
--- /dev/null
+++ b/plugins/checker/tests/configs/.rr-checker-init.yaml
@@ -0,0 +1,29 @@
+rpc:
+  listen: tcp://127.0.0.1:6005
+  disabled: false
+
+server:
+  command: "php ../../../tests/http/client.php echo pipes"
+  user: ""
+  group: ""
+  env:
+    "RR_HTTP": "true"
+  relay: "pipes"
+  relayTimeout: "20s"
+
+status:
+  address: "127.0.0.1:34333"
+
+http:
+  debug: true
+  address: 127.0.0.1:11933
+  maxRequestSize: 1024
+  middleware: [ "" ]
+  uploads:
+    forbid: [ ".php", ".exe", ".bat" ]
+  trustedSubnets: [ "10.0.0.0/8", "127.0.0.0/8", "172.16.0.0/12", "192.168.0.0/16", "::1/128", "fc00::/7", "fe80::/10" ]
+  pool:
+    numWorkers: 2
+    maxJobs: 0
+    allocateTimeout: 60s
+    destroyTimeout: 60s
+\ No newline at end of file
diff --git a/plugins/checker/tests/plugin_test.go b/plugins/checker/tests/plugin_test.go
new file mode 100644
index 00000000..c93b68af
--- /dev/null
+++ b/plugins/checker/tests/plugin_test.go
@@ -0,0 +1,188 @@
+package tests
+
+import (
+	"io/ioutil"
+	"net"
+	"net/http"
+	"net/rpc"
+	"os"
+	"os/signal"
+	"sync"
+	"syscall"
+	"testing"
+	"time"
+
+	"github.com/spiral/endure"
+	"github.com/spiral/goridge/v2"
+	"github.com/spiral/roadrunner/v2/interfaces/status"
+	"github.com/spiral/roadrunner/v2/plugins/checker"
+	"github.com/spiral/roadrunner/v2/plugins/config"
+	httpPlugin "github.com/spiral/roadrunner/v2/plugins/http"
+	"github.com/spiral/roadrunner/v2/plugins/logger"
+	rpcPlugin "github.com/spiral/roadrunner/v2/plugins/rpc"
+	"github.com/spiral/roadrunner/v2/plugins/server"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestStatusHttp(t *testing.T) {
+	cont, err := endure.NewContainer(nil, endure.SetLogLevel(endure.DebugLevel))
+	assert.NoError(t, err)
+
+	cfg := &config.Viper{
+		Path:   "configs/.rr-checker-init.yaml",
+		Prefix: "rr",
+	}
+
+	err = cont.RegisterAll(
+		cfg,
+		&logger.ZapLogger{},
+		&server.Plugin{},
+		&httpPlugin.Plugin{},
+		&checker.Plugin{},
+	)
+	assert.NoError(t, err)
+
+	err = cont.Init()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	ch, err := cont.Serve()
+	assert.NoError(t, err)
+
+	sig := make(chan os.Signal, 1)
+	signal.Notify(sig, os.Interrupt, syscall.SIGINT, syscall.SIGTERM)
+
+	wg := &sync.WaitGroup{}
+	wg.Add(1)
+
+	tt := time.NewTimer(time.Second * 10)
+
+	go func() {
+		defer wg.Done()
+		for {
+			select {
+			case e := <-ch:
+				assert.Fail(t, "error", e.Error.Error())
+				err = cont.Stop()
+				if err != nil {
+					assert.FailNow(t, "error", err.Error())
+				}
+			case <-sig:
+				err = cont.Stop()
+				if err != nil {
+					assert.FailNow(t, "error", err.Error())
+				}
+				return
+			case <-tt.C:
+				// timeout
+				err = cont.Stop()
+				if err != nil {
+					assert.FailNow(t, "error", err.Error())
+				}
+				return
+			}
+		}
+	}()
+
+	time.Sleep(time.Second)
+	t.Run("CheckerGetStatus", checkHTTPStatus)
+	wg.Wait()
+}
+
+const resp = `Service: http: Status: 200
+Service: rpc not found`
+
+func checkHTTPStatus(t *testing.T) {
+	req, err := http.NewRequest("GET", "http://127.0.0.1:34333/v1/health?plugin=http&plugin=rpc", nil)
+	assert.NoError(t, err)
+
+	r, err := http.DefaultClient.Do(req)
+	assert.NoError(t, err)
+	b, err := ioutil.ReadAll(r.Body)
+	assert.NoError(t, err)
+	assert.Equal(t, 200, r.StatusCode)
+	assert.Equal(t, resp, string(b))
+
+	err = r.Body.Close()
+	assert.NoError(t, err)
+}
+
+func TestStatusRPC(t *testing.T) {
+	cont, err := endure.NewContainer(nil, endure.SetLogLevel(endure.DebugLevel))
+	assert.NoError(t, err)
+
+	cfg := &config.Viper{
+		Path:   "configs/.rr-checker-init.yaml",
+		Prefix: "rr",
+	}
+
+	err = cont.RegisterAll(
+		cfg,
+		&rpcPlugin.Plugin{},
+		&logger.ZapLogger{},
+		&server.Plugin{},
+		&httpPlugin.Plugin{},
+		&checker.Plugin{},
+	)
+	assert.NoError(t, err)
+
+	err = cont.Init()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	ch, err := cont.Serve()
+	assert.NoError(t, err)
+
+	sig := make(chan os.Signal, 1)
+	signal.Notify(sig, os.Interrupt, syscall.SIGINT, syscall.SIGTERM)
+
+	wg := &sync.WaitGroup{}
+	wg.Add(1)
+
+	tt := time.NewTimer(time.Second * 10)
+
+	go func() {
+		defer wg.Done()
+		for {
+			select {
+			case e := <-ch:
+				assert.Fail(t, "error", e.Error.Error())
+				err = cont.Stop()
+				if err != nil {
+					assert.FailNow(t, "error", err.Error())
+				}
+			case <-sig:
+				err = cont.Stop()
+				if err != nil {
+					assert.FailNow(t, "error", err.Error())
+				}
+				return
+			case <-tt.C:
+				// timeout
+				err = cont.Stop()
+				if err != nil {
+					assert.FailNow(t, "error", err.Error())
+				}
+				return
+			}
+		}
+	}()
+
+	time.Sleep(time.Second)
+	t.Run("CheckerGetStatusRpc", checkRPCStatus)
+	wg.Wait()
+}
+
+func checkRPCStatus(t *testing.T) {
+	conn, err := net.Dial("tcp", "127.0.0.1:6005")
+	assert.NoError(t, err)
+	client := rpc.NewClientWithCodec(goridge.NewClientCodec(conn))
+
+	st := &status.Status{}
+
+	err = client.Call("status.Status", "http", &st)
+	assert.NoError(t, err)
+	assert.Equal(t, st.Code, 200)
+}