mirror of https://github.com/kubernetes/kops.git
116 lines
2.9 KiB
Go
116 lines
2.9 KiB
Go
/*
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Copyright 2020 The Kubernetes Authors.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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*/
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package aws
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import (
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"errors"
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"math/rand"
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"sort"
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)
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var allZones = []string{
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"ap-northeast-1a",
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"ap-northeast-1c",
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"ap-northeast-1d",
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// AZ does not exist, so we're breaking the 3 AZs per region target here
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//"ap-northeast-2b",
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"ap-northeast-2a",
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"ap-northeast-2c",
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"ap-northeast-2d",
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// Disabled until etcd-manager supports the region and the AMIs used in testing are present
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//"ap-northeast-3a",
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//"ap-northeast-3b",
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//"ap-northeast-3c",
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"ap-south-1a",
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"ap-south-1b",
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"ap-south-1c",
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"ap-southeast-1a",
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"ap-southeast-1b",
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"ap-southeast-1c",
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"ap-southeast-2a",
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"ap-southeast-2b",
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"ap-southeast-2c",
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"ca-central-1a",
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"ca-central-1b",
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"ca-central-1d",
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"eu-central-1a",
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"eu-central-1b",
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"eu-central-1c",
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// Disabled until region limits are increased https://github.com/kubernetes/k8s.io/issues/1921
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//"eu-north-1a",
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//"eu-north-1b",
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//"eu-north-1c",
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"eu-west-1a",
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"eu-west-1b",
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"eu-west-1c",
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"eu-west-2a",
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"eu-west-2b",
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"eu-west-2c",
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"eu-west-3a",
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"eu-west-3b",
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"eu-west-3c",
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"sa-east-1a",
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"sa-east-1b",
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"sa-east-1c",
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"us-east-1a",
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"us-east-1b",
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"us-east-1c",
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"us-east-1d",
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"us-east-1e",
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"us-east-1f",
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"us-east-2a",
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"us-east-2b",
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"us-east-2c",
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"us-west-1a",
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"us-west-1b",
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//"us-west-1c", AZ does not exist, so we're breaking the 3 AZs per region target here
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"us-west-2a",
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"us-west-2b",
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"us-west-2c",
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"us-west-2d",
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}
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// ErrNoEligibleRegion indicates the requested number of zones is not available in any region
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var ErrNoEligibleRegion = errors.New("No eligible AWS region found with enough zones")
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// RandomZones returns a random set of availability zones within a region
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func RandomZones(count int) ([]string, error) {
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regions := make(map[string][]string)
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for _, zone := range allZones {
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region := zone[:len(zone)-1]
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regions[region] = append(regions[region], zone)
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}
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eligibleRegions := make([][]string, 0)
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for _, zones := range regions {
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if len(zones) >= count {
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eligibleRegions = append(eligibleRegions, zones)
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}
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}
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if len(eligibleRegions) == 0 {
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return nil, ErrNoEligibleRegion
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}
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chosenRegion := eligibleRegions[rand.Int()%len(eligibleRegions)]
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chosenZones := make([]string, 0)
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randIndexes := rand.Perm(len(chosenRegion))
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for i := 0; i < count; i++ {
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chosenZones = append(chosenZones, chosenRegion[randIndexes[i]])
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}
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sort.Strings(chosenZones)
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return chosenZones, nil
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}
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