resources

Usando Resources

Instale o metrics-server como pré-requisito para os exemplos a seguir:

kubectl apply -f https://github.com/kubernetes-sigs/metrics-server/releases/latest/download/components.yaml

Para concluir a instalação, edite o deployment adicionando um campo --kubelet-insecure-tls da lista de args do container.

01 - Especificação de requests e limits de memória:

Crie o seguinte Pod no cluster:

apiVersion: v1
kind: Pod
metadata:
  name: memory-demo
  namespace: default
spec:
  containers:
  - name: memory-demo-ctr
    image: polinux/stress
    resources:
      requests:
        memory: "100Mi"
      limits:
        memory: "200Mi"
    command: ["stress"]
    args: ["--vm", "1", "--vm-bytes", "150M", "--vm-hang", "1"]

kubectl apply -f exemplo-01.yaml

02 - Excendendo o limite de memória

Crie o seguinte Pod no cluster:

apiVersion: v1
kind: Pod
metadata:
  name: memory-demo-2
  namespace: default
spec:
  containers:
  - name: memory-demo-2-ctr
    image: polinux/stress
    resources:
      requests:
        memory: "50Mi"
      limits:
        memory: "100Mi"
    command: ["stress"]
    args: ["--vm", "1", "--vm-bytes", "250M", "--vm-hang", "1"]

kubectl apply -f exemplo-02.yaml

03 - Nodes sem memória suficiente para entregar para o Pod

apiVersion: v1
kind: Pod
metadata:
  name: memory-demo-3
  namespace: default
spec:
  containers:
  - name: memory-demo-3-ctr
    image: polinux/stress
    resources:
      requests:
        memory: "1000Gi"
      limits:
        memory: "1000Gi"
    command: ["stress"]
    args: ["--vm", "1", "--vm-bytes", "150M", "--vm-hang", "1"]

kubectl apply -f exemplo-03.yaml