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NO-JIRA: Fixes to the CSV, Godoc #70

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Apr 17, 2024
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NO-JIRA: Fixes to the CSV, Godoc #70

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34 changes: 25 additions & 9 deletions README.md
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Expand Up @@ -2,22 +2,27 @@

The Multiarch Tuning Operator enhances the user experience for administrators of Openshift clusters with
multi-architecture compute nodes or Site Reliability Engineers willing to migrate from single-arch to multi-arch
OpenShift. When diverse CPU architectures coexist within a cluster, the Multiarch Tuning Operator operator stands out as a pivotal tool to
OpenShift. When diverse CPU architectures coexist within a cluster, the Multiarch Tuning Operator stands out as a pivotal tool to
enhance efficiency and streamline operations such as architecture-aware scheduling of workloads.

The development work is still ongoing and there is no official, general available, release of it yet.

## Description

- **Architecture aware Pod Placement**: The pod placement operand aims to automate the
inspection of the container images, derive a set of architectures supported by a pod and use it to
automatically define strong predicates based on the `kubernetes.io/arch` label in the pod's nodeAffinity.
## Operands

- **Architecture aware Pod Placement**: The pod placement operand consists of
the `PodPlacementController` and the `PodPlacementWebhook` and is managed through
a singleton custom resource - `podplacementconfigs.multiarch.openshift.io`.
Its aim is to automate the set up of strong predicates based on the
`kubernetes.io/arch` label in the pod's _nodeAffinity_ by inspecting the container
images in each pod and deriving a set of architectures supported by
the pod. When a pod is created, the `PodPlacementWebhook` will add the
`multiarch.openshift.io/scheduling-gate` scheduling gate.
It will prevent the pod from being scheduled until the `PodPlacementController`
computes a predicate for the `kubernetes.io/arch` label, adds it as a node affinity
requirement to the pod spec, and removes the scheduling gate.
This operand is based on the [KEP-3521](https://github.com/kubernetes/enhancements/blob/afad6f270c7ac2ae853f4d1b72c379a6c3c7c042/keps/sig-scheduling/3521-pod-scheduling-readiness/README.md) and
[KEP-3838](https://github.com/kubernetes/enhancements/blob/afad6f270c7ac2ae853f4d1b72c379a6c3c7c042/keps/sig-scheduling/3838-pod-mutable-scheduling-directives/README.md), as
described in the [Openshift EP](https://github.com/openshift/enhancements/blob/6cebc13f0672c601ebfae669ea4fc8ca632721b5/enhancements/multi-arch/multiarch-manager-operator.md) introducing it.
When a pod is created, the mutating webhook will add the `multiarch.openshift.io/scheduling-gate` scheduling gate, that will
prevent the pod from being scheduled until the controller computes a predicate for the `kubernetes.io/arch` label,
adds it as node affinity requirement to the pod spec and removes the scheduling gate.

## Getting Started

Expand All @@ -27,6 +32,17 @@ will be carried out on Openshift clusters.

### Development

### Prerequisites

The development tooling of this repository depends on the following tools/technologies:

- Golang
- Docker (Community Edition)
- Development headers and libraries for gpgme (`gpgme-devel` in Fedora/CS9/RHEL, `libgpgme-dev` in Debian)
- `operator-sdk`
- `make`
- `qemu-user-static` (to support building multi-arch container images via `docker buildx`)

### Build the operator

```shell
Expand Down
57 changes: 19 additions & 38 deletions apis/multiarch/v1alpha1/podplacementconfig_types.go
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Expand Up @@ -22,56 +22,35 @@ import (

// PodPlacementConfigSpec defines the desired state of PodPlacementConfig
type PodPlacementConfigSpec struct {
// LogVerbosity is the log level for the pod placement controller
// LogVerbosity is the log level for the pod placement controller.
// Valid values are: "Normal", "Debug", "Trace", "TraceAll".
// Defaults to "Normal".
// +optional
// +kubebuilder:default=Normal
LogVerbosity LogVerbosityLevel `json:"logVerbosity,omitempty"`

// NamespaceSelector decides whether to run the admission control policy on an object based
// on whether the namespace for that object matches the selector. If the
// object itself is a namespace, the matching is performed on
// object.metadata.labels. If the object is another cluster scoped resource,
// it never skips the policy.
// NamespaceSelector filters the namespaces that the architecture aware pod placement can operate.
//
// For example, to run the webhook on any objects whose namespace is not
// associated with "runlevel" of "0" or "1"; you will set the selector as
// follows:
// "namespaceSelector": {
// "matchExpressions": [
// {
// "key": "runlevel",
// "operator": "NotIn",
// "values": [
// "0",
// "1"
// ]
// }
// ]
// }
// For example, users can configure an opt-out filter to disallow the operand from operating on namespaces with a given
// label:
//
// If instead you want to only run the policy on any objects whose
// namespace is associated with the "environment" of "prod" or "staging";
// you will set the selector as follows:
// "namespaceSelector": {
// "matchExpressions": [
// {
// "key": "environment",
// "operator": "In",
// "values": [
// "prod",
// "staging"
// ]
// }
// ]
// }
// {"namespaceSelector":{"matchExpressions":[{"key":"multiarch.openshift.io/exclude-pod-placement","operator":"DoesNotExist"}]}}
//
// The operand will set the node affinity requirement in all the pods created in namespaces that do not have
// the `multiarch.openshift.io/exclude-pod-placement` label.
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//
// Alternatively, users can configure an opt-in filter to operate only on namespaces with specific labels:
//
// {"namespaceSelector":{"matchExpressions":[{"key":"multiarch.openshift.io/include-pod-placement","operator":"Exists"}]}}
//
// The operand will set the node affinity requirement in all the pods created in namespace labeled with the key
// `multiarch.ioenshift.io/include-pod-placement`.
//
// See
// https://kubernetes.io/docs/concepts/overview/working-with-objects/labels/
// for more examples of label selectors.
//
// Default to the empty LabelSelector, which matches everything.
// Default to the empty LabelSelector, which matches everything. Selectors are ANDed.
// +optional
NamespaceSelector *metav1.LabelSelector `json:"namespaceSelector,omitempty"`
}
Expand All @@ -82,10 +61,12 @@ type PodPlacementConfigStatus struct {
Conditions []metav1.Condition `json:"conditions,omitempty"`
}

// PodPlacementConfig defines the configuration for the PodPlacement operand.
// It is a singleton resource that can consist of an object named cluster.
// Creating this object will trigger the deployment of the architecture aware pod placement operand.
// +kubebuilder:object:root=true
// +kubebuilder:subresource:status
// +kubebuilder:resource:path=podplacementconfigs,scope=Cluster
// PodPlacementConfig is the Schema for the podplacementconfigs API
type PodPlacementConfig struct {
metav1.TypeMeta `json:",inline"`
metav1.ObjectMeta `json:"metadata,omitempty"`
Expand Down
56 changes: 37 additions & 19 deletions bundle/manifests/multiarch-tuning-operator.clusterserviceversion.yaml
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Expand Up @@ -8,13 +8,6 @@ metadata:
"apiVersion": "multiarch.openshift.io/v1alpha1",
"kind": "PodPlacementConfig",
"metadata": {
"labels": {
"app.kubernetes.io/created-by": "multiarch-tuning-operator",
"app.kubernetes.io/instance": "podplacementconfig-sample",
"app.kubernetes.io/managed-by": "kustomize",
"app.kubernetes.io/name": "podplacementconfig",
"app.kubernetes.io/part-of": "multiarch-tuning-operator"
},
"name": "cluster"
},
"spec": {
Expand All @@ -30,14 +23,19 @@ metadata:
}
}
]
capabilities: Basic Install
capabilities: Seamless Upgrades
categories: OpenShift Optional, Other
console.openshift.io/disable-operand-delete: "true"
createdAt: "2024-03-19T21:51:59Z"
createdAt: "2024-04-05T16:28:15Z"
operator.openshift.io/uninstall-message: This action won't automatically delete
managed resources (operands). To prevent data loss or disruption, you'll need
to manually delete them.
operatorframework.io/cluster-monitoring: "true"
operatorframework.io/suggested-namespace: openshift-multiarch-tuning-operator
operators.operatorframework.io/builder: operator-sdk-v1.33.0
operators.operatorframework.io/project_layout: go.kubebuilder.io/v3
repository: https://github.com/openshift/multiarch-tuning-operator
support: Red Hat
labels:
operatorframework.io/arch.amd64: supported
operatorframework.io/arch.arm64: supported
Expand All @@ -49,18 +47,37 @@ spec:
apiservicedefinitions: {}
customresourcedefinitions:
owned:
- description: PodPlacementConfig is the Schema for the podplacementconfigs API
- description: PodPlacementConfig defines the configuration for the PodPlacement
operand. It is a singleton resource that can consist of an object named cluster.
Creating this object will trigger the deployment of the architecture aware
pod placement operand.
displayName: Pod Placement Config
kind: PodPlacementConfig
name: podplacementconfigs.multiarch.openshift.io
version: v1alpha1
description: The Multiarch Tuning Operator enhances the user experience for administrators
of Openshift clusters with multi-architecture compute nodes or Site Reliability
Engineers willing to migrate from single-arch to multi-arch OpenShift. When diverse
CPU architectures coexist within a cluster, the Multiarch Tuning Operator operator
stands out as a pivotal tool to enhance efficiency and streamline operations such
as architecture-aware scheduling of workloads.
displayName: multiarch-tuning-operator
description: |
The Multiarch Tuning Operator enhances the user experience for administrators of
Openshift clusters with multi-architecture compute nodes or Site Reliability
Engineers willing to migrate from single-arch to multi-arch OpenShift. When
diverse CPU architectures coexist within a cluster,
the Multiarch Tuning Operator stands out as a pivotal tool to
enhance efficiency and streamline operations such as architecture-aware
scheduling of workloads.

## Operands

- **Architecture aware Pod Placement**: The pod placement operand consists of
the `PodPlacementController` and the `PodPlacementWebhook` and is managed through
a singleton custom resource - `podplacementconfigs.multiarch.openshift.io`.
Its aim is to automate the set up of strong predicates based on the
`kubernetes.io/arch` label in the pod's _nodeAffinity_ by inspecting the container
images in each pod and deriving a set of architectures supported by
the pod. When a pod is created, the `PodPlacementWebhook` will add the
`multiarch.openshift.io/scheduling-gate` scheduling gate.
It will prevent the pod from being scheduled until the `PodPlacementController`
computes a predicate for the `kubernetes.io/arch` label, adds it as a node affinity
requirement to the pod spec, and removes the scheduling gate.
displayName: Multiarch Tuning Operator
icon:
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
mediatype: image/png
Expand Down Expand Up @@ -353,10 +370,11 @@ spec:
- multiarch-tuning-operator
- pod-placement
links:
- name: Multiarch Tuning Operator
url: https://github.com/openshift/multiarch-tuning-operator
- name: Multiarch Tuning Operator Documentation
url: https://docs.openshift.com/container-platform/4.16/post_installation_configuration/configuring-multi-arch-compute-machines/multiarch-tuning-operator.html
maturity: alpha
minKubeVersion: 1.27.0
provider:
name: Red Hat
url: https://github.com/openshift/multiarch-tuning-operator
version: 0.0.1