fix dockerfile and added some log messages

Dockerfile

@@ -9,14 +9,14 @@ RUN go mod download
 
 COPY . ./
 
-RUN go build -o /etcd-defrag-controller
+RUN CGO_ENABLED=0 go build -o /etcd-defrag-controller
 
 ## Deploy
 FROM gcr.io/distroless/static:nonroot
 WORKDIR /
 
 USER 65532:65532
 
-COPY --from=builder /etcd-defrag-controller /etcd-defrag-controller
+COPY --from=builder /etcd-defrag-controller .
 
 ENTRYPOINT ["/etcd-defrag-controller"]

cmd/root.go

@@ -1,6 +1,5 @@
 /*
 Copyright © 2022 Denis Khachyan <[email protected]>
-
 */
 package cmd
 
@@ -54,11 +53,15 @@ func StartController() {
 	for {
 		c := GetConnOpts()
 		d := GetDefragOpts()
+		if c.Endpoints == "" {
+			log.Fatal("Missing endpoints")
+		}
 		ctx, cancel := context.WithTimeout(context.Background(), client.RequestDefaultTimeout)
 		dc, err := defrag.NewDefragController(ctx, c, d)
 		if err != nil {
 			log.Fatal("Failed to start defrag controller")
 		}
+		klog.Info("Controller started")
 		err = dc.RunDefrag()
 		if err != nil {
 			klog.Errorf("Defragment error: %v", err)

pkg/client/client.go

@@ -3,8 +3,8 @@ package client
 import (
 	"crypto/tls"
 	"crypto/x509"
-	"io/ioutil"
 	"log"
+	"os"
 	"strings"
 	"time"
 
@@ -59,7 +59,7 @@ func NewTLSConfig(c *ConnOpts) (*tls.Config, error) {
 		return nil, err
 	}
 
-	cacert, err := ioutil.ReadFile(c.CAfile)
+	cacert, err := os.ReadFile(c.CAfile)
 	if err != nil {
 		return nil, err
 	}