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https://github.com/intel/intel-device-plugins-for-kubernetes.git
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0574c42078
The function will be re-used by other webhooks too so it's better to move it to its own package. The unit tests are taken from the original implementation with some minor changes. Signed-off-by: Mikko Ylinen <mikko.ylinen@intel.com>
65 lines
2.0 KiB
Go
65 lines
2.0 KiB
Go
// Copyright 2020 Intel Corporation. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package containers
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import (
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"strings"
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"github.com/pkg/errors"
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corev1 "k8s.io/api/core/v1"
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)
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// GetRequestedResources validates the container's requirements first, then returns them as a map.
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func GetRequestedResources(container corev1.Container, ns string) (map[string]int64, error) {
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// Container may happen to have Requests, but not Limits. Check Requests first,
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// then in the next loop iterate over Limits.
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for resourceName, resourceQuantity := range container.Resources.Requests {
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rname := strings.ToLower(string(resourceName))
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if !strings.HasPrefix(rname, ns) {
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continue
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}
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if container.Resources.Limits[resourceName] != resourceQuantity {
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return nil, errors.Errorf(
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"'limits' and 'requests' for %q must be equal as extended resources cannot be overcommitted",
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rname)
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}
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}
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resources := make(map[string]int64)
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for resourceName, resourceQuantity := range container.Resources.Limits {
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rname := strings.ToLower(string(resourceName))
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if !strings.HasPrefix(rname, ns) {
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continue
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}
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if container.Resources.Requests[resourceName] != resourceQuantity {
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return nil, errors.Errorf(
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"'limits' and 'requests' for %q must be equal as extended resources cannot be overcommitted",
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rname)
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}
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quantity, ok := resourceQuantity.AsInt64()
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if !ok {
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return nil, errors.Errorf("resource quantity isn't of integral type for %q", rname)
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}
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resources[rname] = quantity
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}
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return resources, nil
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}
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