runtime: resource limits (kubernetes implementation) (#1931)

* runtime: add resource limit CreateOptions

* util/kubernetes/client: implement support for resource limits

* runtime/kubernetes: set resource limits for k8s deployments

* util/kubernetes: remove template check for ints

* util/kubernetes: fix incorrect yaml syntax

* runtime/kubernetes: fix incorrect units

* runtime: update create options to use Resources struct

runtime/kubernetes/service.go

@@ -2,6 +2,7 @@ package kubernetes
 
 import (
 	"encoding/json"
+	"fmt"
 	"strings"
 	"time"
 
@@ -102,6 +103,22 @@ func newService(s *runtime.Service, c runtime.CreateOptions) *service {
 		kdeploy.Spec.Template.PodSpec.Containers[0].Args = c.Args
 	}
 
+	// apply resource limits
+	if c.Resources != nil {
+		resLimits := &client.ResourceLimits{}
+		if c.Resources.CPU > 0 {
+			resLimits.CPU = fmt.Sprintf("%vm", c.Resources.CPU)
+		}
+		if c.Resources.Mem > 0 {
+			resLimits.Memory = fmt.Sprintf("%vMi", c.Resources.Mem)
+		}
+		if c.Resources.Disk > 0 {
+			resLimits.EphemeralStorage = fmt.Sprintf("%vMi", c.Resources.Disk)
+		}
+
+		kdeploy.Spec.Template.PodSpec.Containers[0].Resources = &client.ResourceRequirements{Limits: resLimits}
+	}
+
 	return &service{
 		Service:  s,
 		kservice: kservice,