mirror of https://github.com/docker/docs.git
33 lines
749 B
Go
33 lines
749 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/samalba/dockerclient"
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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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// Initialize is exported
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func (p *RandomPlacementStrategy) Initialize() error {
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rand.Seed(time.Now().UTC().UnixNano())
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return nil
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}
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// PlaceContainer is exported
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func (p *RandomPlacementStrategy) PlaceContainer(config *dockerclient.ContainerConfig, nodes []cluster.Node) (cluster.Node, error) {
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if size := len(nodes); size > 0 {
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n := rand.Intn(len(nodes))
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for i, node := range nodes {
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if i == n {
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return node, nil
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}
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}
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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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