How to provide resource limits in kubernetes go client pod spec? - kubernetes

Question

Spec: v1.PodSpec{
Containers: []v1.Container{
v1.Container{
Name: podName,
Image: deploymentName,
ImagePullPolicy: "IfNotPresent",
Ports: []v1.ContainerPort{},
Env: []v1.EnvVar{
v1.EnvVar{
Name: "RASA_NLU_CONFIG",
Value: os.Getenv("RASA_NLU_CONFIG"),
},
v1.EnvVar{
Name: "RASA_NLU_DATA",
Value: os.Getenv("RASA_NLU_DATA"),
},
},
Resources: v1.ResourceRequirements{},
},
},
RestartPolicy: v1.RestartPolicyOnFailure,
},
I want to provide resource limits as corresponding like :
resources:
limits:
cpu: "1"
requests:
cpu: "0.5"
args:
- -cpus
- "2"
How do I go on to do that. I tried adding Limits and its map key value pair but it seems to be quite a nested structure. There doesnt seem to be any example as to how to provide resources in kube client go.

Answer 1

I struggled with the same when i was creating a statefulset. Maybe my codesnipped will help you:
Resources: apiv1.ResourceRequirements{
Limits: apiv1.ResourceList{
"cpu": resource.MustParse(cpuLimit),
"memory": resource.MustParse(memLimit),
},
Requests: apiv1.ResourceList{
"cpu": resource.MustParse(cpuReq),
"memory": resource.MustParse(memReq),
},
},
the vars cpuReq, memReq, cpuLimit and memLimit are supposed to be strings

Answer 2

Here you can find definition of v1.ResourceRequirements{}:
// ResourceRequirements describes the compute resource requirements.
type ResourceRequirements struct {
// Limits describes the maximum amount of compute resources allowed.
// More info: https://kubernetes.io/docs/concepts/configuration/manage-compute-resources-container/
// +optional
Limits ResourceList `json:"limits,omitempty" protobuf:"bytes,1,rep,name=limits,casttype=ResourceList,castkey=ResourceName"`
// Requests describes the minimum amount of compute resources required.
// If Requests is omitted for a container, it defaults to Limits if that is explicitly specified,
// otherwise to an implementation-defined value.
// More info: https://kubernetes.io/docs/concepts/configuration/manage-compute-resources-container/
// +optional
Requests ResourceList `json:"requests,omitempty" protobuf:"bytes,2,rep,name=requests,casttype=ResourceList,castkey=ResourceName"`
}
ResourceList:
// ResourceList is a set of (resource name, quantity) pairs.
type ResourceList map[ResourceName]resource.Quantity
Here you can find test file with example of use.
Sourcegraph plugin for Crome or Firefox could be very helpful to work with a source code on GitHub.