K
Q

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

10/25/2018
    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.

-- mohd.gadi
kubernetes
kubernetes-go-client

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2 Answers

10/25/2018

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.

-- VAS
Source: StackOverflow
10/26/2018

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

-- Louis Baumann
Source: StackOverflow