65 lines
1.4 KiB
Go
65 lines
1.4 KiB
Go
package consul
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import (
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"time"
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"github.com/hashicorp/consul/agent/router"
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"github.com/hashicorp/serf/serf"
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)
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// FloodNotify lets all the waiting Flood goroutines know that some change may
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// have affected them.
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func (s *Server) FloodNotify() {
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s.floodLock.RLock()
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defer s.floodLock.RUnlock()
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for _, ch := range s.floodCh {
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select {
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case ch <- struct{}{}:
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default:
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}
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}
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}
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// Flood is a long-running goroutine that floods servers from the LAN to the
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// given global Serf instance, such as the WAN. This will exit once either of
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// the Serf instances are shut down.
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func (s *Server) Flood(addrFn router.FloodAddrFn, dstSerf *serf.Serf) {
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s.floodLock.Lock()
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floodCh := make(chan struct{})
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s.floodCh = append(s.floodCh, floodCh)
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s.floodLock.Unlock()
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ticker := time.NewTicker(s.config.SerfFloodInterval)
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defer ticker.Stop()
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defer func() {
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s.floodLock.Lock()
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defer s.floodLock.Unlock()
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for i, ch := range s.floodCh {
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if ch == floodCh {
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s.floodCh = append(s.floodCh[:i], s.floodCh[i+1:]...)
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return
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}
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}
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panic("flood channels out of sync")
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}()
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for {
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select {
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case <-s.serfLAN.ShutdownCh():
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return
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case <-dstSerf.ShutdownCh():
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return
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case <-ticker.C:
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router.FloodJoins(s.logger, addrFn, s.config.Datacenter, s.serfLAN, dstSerf)
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case <-floodCh:
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router.FloodJoins(s.logger, addrFn, s.config.Datacenter, s.serfLAN, dstSerf)
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}
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}
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}
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