explicit swap

examples.yaml

# "Explicit swap"
# The user can explicitly request swap
kind: Pod
spec:
  resources
    requests:
      # This assumes separate resources for mem and swap
      # Set by user
      memory: 2G
      # Set by user
      node.kubernetes.io/swap: 2G
---
# "Virtual memory"
# Builds on “explicit swap”
# The user can request virtual-memory, the system will split this into memory and swap resources
# The user can also still explicitly request swap
kind: Pod
spec:
  resources
    requests:
      # This assumes a virtual resource for swap and memory which is split into mem+swap by a webhook
      # Set by user: Give me 4GB of virtual memory, you manage it for me
      node.kubernetes.io/virtual-memory: 4G
      # Computed by system: swap according to ratio (in this example 50/50)
      node.kubernetes.io/swap: 2G
      # Computed by system: memory according to ratio (in this example 50/50)
      memory: 2G
---
# Implicit/Transparent swap
kind: Pod
spec:
  resources
    requests:
      # This assumes node.mem.cap = ram + swap. this would not allow to differentiate anymore
      # Set by user
      memory: 4G