mirror of https://github.com/docker/docs.git
66 lines
1.7 KiB
Go
66 lines
1.7 KiB
Go
package scheduler
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import (
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"sync"
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"github.com/docker/swarm/cluster"
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"github.com/docker/swarm/scheduler/filter"
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"github.com/docker/swarm/scheduler/strategy"
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"github.com/samalba/dockerclient"
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)
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type Scheduler struct {
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sync.Mutex
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cluster *cluster.Cluster
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strategy strategy.PlacementStrategy
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filters []filter.Filter
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}
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func NewScheduler(cluster *cluster.Cluster, strategy strategy.PlacementStrategy, filters []filter.Filter) *Scheduler {
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return &Scheduler{
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cluster: cluster,
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strategy: strategy,
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filters: filters,
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}
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}
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// Find a nice home for our container.
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func (s *Scheduler) selectNodeForContainer(config *dockerclient.ContainerConfig) (*cluster.Node, error) {
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candidates := s.cluster.Nodes()
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accepted, err := filter.ApplyFilters(s.filters, config, candidates)
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if err != nil {
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return nil, err
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}
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return s.strategy.PlaceContainer(config, accepted)
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}
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// Schedule a brand new container into the cluster.
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func (s *Scheduler) CreateContainer(config *dockerclient.ContainerConfig, name string) (*cluster.Container, error) {
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/*Disable for now
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if config.Memory == 0 || config.CpuShares == 0 {
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return nil, fmt.Errorf("Creating containers in clustering mode requires resource constraints (-c and -m) to be set")
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}
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*/
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s.Lock()
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defer s.Unlock()
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node, err := s.selectNodeForContainer(config)
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if err != nil {
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return nil, err
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}
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return node.Create(config, name, true)
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}
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// Remove a container from the cluster. Containers should always be destroyed
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// through the scheduler to guarantee atomicity.
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func (s *Scheduler) RemoveContainer(container *cluster.Container, force bool) error {
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s.Lock()
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defer s.Unlock()
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return container.Node.Destroy(container, force)
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}
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