Add RECHECK_INTERVAL env-var

cmd/app/main.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"net"
 	"os"
+	"strconv"
 	"time"
 
 	envChecks "git.ruekov.eu/ruakij/routingtabletowg/lib/environmentchecks"
@@ -20,6 +21,7 @@ var envRequired = []string{
 var envDefaults = map[string]string{
     "IPV6_FORMAT": "fc12::%02x%02x:%02x%02x/%d",
     "FILTER_PREFIX": "100.100",
+    "RECHECK_INTERVAL": "300",
 }
 
 func main() {
@@ -46,6 +48,12 @@ func main() {
 
     filterPrefix := os.Getenv("FILTER_PREFIX")
 
+    checkIntervalStr := os.Getenv("RECHECK_INTERVAL")
+    checkIntervalSec, err := strconv.Atoi(checkIntervalStr)
+	if err != nil {
+		logger.Error.Fatalf("Couldn't read RECHECK_INTERVAL '%s': %s", checkIntervalStr, err)
+	}
+    checkInterval := time.Second * time.Duration(checkIntervalSec)
 
     // Get the IPv4 address of the interface
     addrs, err := netlink.AddrList(netInterface, netlink.FAMILY_V4)
@@ -138,8 +146,8 @@ func main() {
             }
         }
         
-        // Sleep for 300 seconds before running the loop again
+        // Sleep for x seconds before running the loop again
-        time.Sleep(time.Second * 300)
+        time.Sleep(checkInterval)
     }
 }