kube-batch
descheduler
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| kube-batch | descheduler | |
|---|---|---|
| 3 | 1 | |
| 1,057 | 1,796 | |
| - | - | |
| 4.0 | 8.6 | |
| 11 months ago | almost 3 years ago | |
| Go | Go | |
| Apache License 2.0 | Apache License 2.0 |
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kube-batch
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Volcano vs Yunikorn vs Knative
tldr; Knative Batch Job provider should support the respective coscheduling and kube-batch support. We had developed an in-house one for KubeFlow, from scratch. We had added Apache Arrow support into knative-serving with the respective CloudEvents interop layer, natively (i.e. secure shmem via IPC namespace, instead of message passing on the same host). We use it as a direct replacement for Apache Arrow Ballista, and had planned researching further DataFusion compat layer. Almost any modern ETL is pretty dubious without Apache Arrow.
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Kubernetes Was Never Designed for Batch Jobs
Another aspect of batch jobs is that we’ll often want to run distributed computations where we split our data into chunks and run a function on each chunk. One popular option is to run Spark, which is built for exactly this use case, on top of Kubernetes. And there are other options for additional software to make running distributed computations on Kubernetes easier.
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Scaling Kubernetes to 7,500 Nodes
> That said, strain on the kube-scheduler is spiky. A new job may consist of many hundreds of pods all being created at once, then return to a relatively low rate of churn.
Last I checked, the default scheduler places Pods one at a time. It might be advantageous to use a gang/batch scheduler like kube-batch[0], Poseidon[1] or DCM[2].
[0] https://github.com/kubernetes-sigs/kube-batch
[1] https://github.com/kubernetes-sigs/poseidon
[2] https://github.com/vmware/declarative-cluster-management
descheduler
What are some alternatives?
volcano - A Cloud Native Batch System (Project under CNCF)
kube-scheduler-simulator - The simulator for the Kubernetes scheduler
argo - Workflow Engine for Kubernetes
scheduler-plugins - Repository for out-of-tree scheduler plugins based on scheduler framework.
mpi-operator - Kubernetes Operator for MPI-based applications (distributed training, HPC, etc.)
kueue - Kubernetes-native Job Queueing
descheduler - Descheduler for Kubernetes
sidekick - High Performance HTTP Sidecar Load Balancer
sarus - OCI-compatible engine to deploy Linux containers on HPC environments.
warewulf - Warewulf is a stateless and diskless container operating system provisioning system for large clusters of bare metal and/or virtual systems.
armada - A multi-cluster batch queuing system for high-throughput workloads on Kubernetes.