mirror of https://github.com/docker/docs.git
46 lines
953 B
Go
46 lines
953 B
Go
package strategy
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import (
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"sort"
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"github.com/docker/swarm/scheduler/node"
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"github.com/samalba/dockerclient"
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)
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// SpreadPlacementStrategy is exported
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type SpreadPlacementStrategy struct {
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}
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// Initialize is exported
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func (p *SpreadPlacementStrategy) Initialize() error {
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return nil
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}
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// Name returns the name of the strategy
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func (p *SpreadPlacementStrategy) Name() string {
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return "spread"
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}
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// PlaceContainer is exported
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func (p *SpreadPlacementStrategy) PlaceContainer(config *dockerclient.ContainerConfig, nodes []*node.Node) (*node.Node, error) {
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weightedNodes, err := weighNodes(config, nodes)
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if err != nil {
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return nil, err
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}
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// sort by lowest weight
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sort.Sort(weightedNodes)
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bottomNode := weightedNodes[0]
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for _, node := range weightedNodes {
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if node.Weight != bottomNode.Weight {
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break
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}
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if len(node.Node.Containers) < len(bottomNode.Node.Containers) {
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bottomNode = node
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}
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}
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return bottomNode.Node, nil
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}
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