Affinity

Affinities work with the help of Expressions to specify inclusions and exclusions for particular needs.

preferredDuringSchedulingIgnoredDuringExecution

preferredDuringSchedulingIgnoredDuringExecution option is exposed in the affinity instance as addPreference:

use RenokiCo\PhpK8s\K8s;

$az = K8s::expression()->in('azname', ['us-east-1a', 'us-east-1b']);
$tier = K8s::expression()->in('tier', ['backend']);

$affinity = K8s::affinity()->addPreference([$az], [], 100); // weight: 100

For nodeSelectorTerms, you can use addNodeSelectorPreference() with the same parameters.

requiredDuringSchedulingIgnoredDuringExecution

requiredDuringSchedulingIgnoredDuringExecution option is exposed in the affinity instance as addNodeRequirement:

use RenokiCo\PhpK8s\K8s;

$az = K8s::expression()->in('azname', ['us-east-1a', 'us-east-1b']);
$tier = K8s::expression()->in('tier', ['backend']);

$affinity = K8s::affinity()->addNodeRequirement(
    [$az],
    [$type]
); // requires AZ and tier: backend

For Label Selector requirement, use addLabelSelectorRequirement:

use RenokiCo\PhpK8s\K8s;

$az = K8s::expression()->in('azname', ['us-east-1a', 'us-east-1b']);
$tier = K8s::expression()->in('tier', ['backend']);

// requires AZ and tier: backend with given topology
$affinity = K8s::affinity()->addLabelSelectorRequirement(
    [$az],
    [$type],
    'aws.amazonaws.io/some-topology'
);