mirror of https://github.com/docker/docs.git
36 lines
885 B
Go
36 lines
885 B
Go
package strategy
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import (
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"errors"
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"math/rand"
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"time"
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"github.com/docker/swarm/cluster"
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"github.com/docker/swarm/scheduler/node"
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)
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// RandomPlacementStrategy randomly places the container into the cluster.
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type RandomPlacementStrategy struct {
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r *rand.Rand
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}
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// Initialize a RandomPlacementStrategy.
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func (p *RandomPlacementStrategy) Initialize() error {
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p.r = rand.New(rand.NewSource(time.Now().UTC().UnixNano()))
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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 *RandomPlacementStrategy) Name() string {
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return "random"
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}
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// PlaceContainer places the container on a random node in the cluster.
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func (p *RandomPlacementStrategy) PlaceContainer(config *cluster.ContainerConfig, nodes []*node.Node) (*node.Node, error) {
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if size := len(nodes); size > 0 {
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return nodes[p.r.Intn(size)], nil
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}
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return nil, errors.New("No nodes running in the cluster")
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}
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