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orchestrator, ingest, and worker each take nodeSelector, tolerations, affinity, and podAnnotations.

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Run on amd64

FineParser images are built for linux/amd64 only. If your cluster can also run arm64 nodes, pin every component:
fineparser-values.yaml

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Give workers their own nodes

A large pool can fill every node it is allowed on. Put workers on a dedicated, tainted node group, and keep the orchestrator and ingest elsewhere. For nodes labeled and tainted fineparser.abbyy.com/pool=worker:
fineparser-values.yaml

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Pre-pulling the worker image

When many workers start on a new node at once, their image pulls can hit the kubelet’s pull rate limit and slow the burst. With worker.prepull enabled, workers wait until the node has pulled the image once.
fineparser-values.yaml
Worker nodes must register with a NoSchedule taint whose key is taintKey. A DaemonSet pulls the image on each new node and then removes the taint.
  • Karpenter: list the taint in the NodePool’s startupTaints.
  • Cluster Autoscaler: create the node group’s nodes with the taint. The default key’s prefix tells Cluster Autoscaler the taint is temporary.
images.worker.pullPolicy must be IfNotPresent, and worker.tolerations must not tolerate the taint. Enabling it creates a ClusterRole that can get and patch Nodes.

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Node drains and interruptions

A stopping worker finishes its current unit first, within a 600-second grace period. If your node autoscaler limits drain time, allow at least that long on worker nodes. A worker stopped mid-unit loses that unit, which another worker retries once the lease expires. Workers can run on Spot or preemptible capacity on that basis. Run the orchestrator and ingest on regular capacity: the orchestrator holds the queue, and the API is unavailable while it restarts.