Data path healing should be disabled

Related issue: cmd-nsc-446

Signed-off-by: Laszlo Kiraly <laszlo.kiraly@est.tech>

internal/config/config.go

@@ -1,4 +1,5 @@
 // Copyright (c) 2020-2022 Doc.ai and/or its affiliates.
+// Copyright (c) 2021-2022 Nordix and/or its affiliates.
 //
 // SPDX-License-Identifier: Apache-2.0
 //
@@ -44,6 +45,7 @@ type Config struct {
 
 	CoreDNSConfigPath string `default:"/etc/coredns/Corefile" desc:"Default path to the Corefile source"`
 
+	LivenessCheck         string        `default:"enabled" desc:"Dataplane liveness check enabled/disabled"`
 	LivenessCheckInterval time.Duration `default:"200ms" desc:"Dataplane liveness check interval"`
 	LivenessCheckTimeout  time.Duration `default:"1s" desc:"Dataplane liveness check timeout"`
 }

main.go

@@ -1,4 +1,5 @@
 // Copyright (c) 2020-2022 Doc.ai and/or its affiliates.
+// Copyright (c) 2021-2022 Nordix and/or its affiliates.
 //
 // Copyright (c) 2022 Cisco and/or its affiliates.
 //
@@ -159,16 +160,21 @@ func main() {
 		dnsClient = dnscontext.NewClient(dnscontext.WithChainContext(ctx), dnscontext.WithCorefilePath(c.CoreDNSConfigPath))
 	}
 
+	var healClient = null.NewClient()
+
+	if c.LivenessCheck != "disabled" {
+		healClient = heal.NewClient(
+			ctx,
+			heal.WithLivenessCheck(kernelheal.KernelLivenessCheck),
+			heal.WithLivenessCheckInterval(c.LivenessCheckInterval),
+			heal.WithLivenessCheckTimeout(c.LivenessCheckTimeout))
+	}
+
 	nsmClient := client.NewClient(ctx,
 		client.WithClientURL(&c.ConnectTo),
 		client.WithName(c.Name),
 		client.WithAuthorizeClient(authorize.NewClient()),
-		client.WithHealClient(
-			heal.NewClient(
-				ctx,
-				heal.WithLivenessCheck(kernelheal.KernelLivenessCheck),
-				heal.WithLivenessCheckInterval(c.LivenessCheckInterval),
-				heal.WithLivenessCheckTimeout(c.LivenessCheckTimeout))),
+		client.WithHealClient(healClient),
 		client.WithAdditionalFunctionality(
 			clientinfo.NewClient(),
 			sriovtoken.NewClient(),