52 lines
1.4 KiB
Go
52 lines
1.4 KiB
Go
package container
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import (
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"github.com/Sirupsen/logrus"
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"github.com/docker/engine-api/types"
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)
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// Health holds the current container health-check state
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type Health struct {
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types.Health
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stop chan struct{} // Write struct{} to stop the monitor
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}
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// String returns a human-readable description of the health-check state
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func (s *Health) String() string {
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// This happens when the container is being shutdown and the monitor has stopped
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// or the monitor has yet to be setup.
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if s.stop == nil {
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return types.Unhealthy
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}
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switch s.Status {
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case types.Starting:
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return "health: starting"
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default: // Healthy and Unhealthy are clear on their own
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return s.Status
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}
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}
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// OpenMonitorChannel creates and returns a new monitor channel. If there already is one,
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// it returns nil.
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func (s *Health) OpenMonitorChannel() chan struct{} {
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if s.stop == nil {
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logrus.Debug("OpenMonitorChannel")
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s.stop = make(chan struct{})
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return s.stop
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}
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return nil
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}
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// CloseMonitorChannel closes any existing monitor channel.
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func (s *Health) CloseMonitorChannel() {
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if s.stop != nil {
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logrus.Debug("CloseMonitorChannel: waiting for probe to stop")
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// This channel does not buffer. Once the write succeeds, the monitor
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// has read the stop request and will not make any further updates
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// to c.State.Health.
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s.stop <- struct{}{}
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s.stop = nil
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logrus.Debug("CloseMonitorChannel done")
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}
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}
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