node selection

[meredrica]

a way to select a cluster node would be nice.
https://kubernetes.io/docs/tasks/configure-pod-container/assign-pods-nodes/

could work like this and support direct nodename as well as labeled nodes

deployment:
 node: "host"

for a labelled node:

deployment:
  node:
    label: value

[meredrica]

scheduling to a specific node is easy

spec:
  nodeName: foo-node # schedule pod to specific node

labelled nodes too

spec:
  nodeSelector:
    disktype: ssd #this is the whole label

[meredrica]

as for affinity, this is a little more complicated
there are two ways to specify preferred or required

required:

spec:
  affinity:
    nodeAffinity:
      requiredDuringSchedulingIgnoredDuringExecution:
        nodeSelectorTerms:
        - matchExpressions:

preferred:

spec:
  affinity:
    nodeAffinity:
      preferredDuringSchedulingIgnoredDuringExecution:
      - weight: 1
        preference:
          matchExpressions:

match expressions are always the same format

- key: another-node-label-key
  operator: In
  values:
  - another-node-label-value

operators are defined here: https://kubernetes.io/docs/concepts/scheduling-eviction/assign-pod-node/#operators

Topology spread will not be done with this feature, I'll add a new one

[meredrica]

additionally, podAffinity can be used instead of nodeAffinity

[meredrica]

so, one way would be for short syntax:

deployment: 
  node: "name"

long syntax:

deployment:
  node:
    'label' : "value"

affinity could be done like this:

deployment:
  affinity:
    pod:
    node:

still thinking about how to do the rest and how to avoid the duplicate node

[FrostbittenKing]

Awesome, thanks. Now it remains that I fill in the remaining blanks for antiAffinity I guess.