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Sleep before restarting event processing

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This prevents restarting event processing in a tight loop.
You can see this with the following steps:

```terminal
$ containerd &
$ dockerd --containerd=/run/containerd/containerd.sock &
$ pkill -9 containerd
```

At this point you will be spammed with logs such as:

```
ERRO[2019-07-12T22:29:37.318761400Z] failed to get event                           error="rpc error: code = Unavailable desc = all SubConns are in TransientFailure, latest connection error: connection error: desc = \"transport: Error while dialing dial unix /run/containerd/containerd.sock: connect: connection refused\"" module=libcontainerd namespace=plugins.moby
```

Without this change you can quickly end up with gigabytes of log data.

Signed-off-by: Brian Goff <cpuguy83@gmail.com>
(cherry picked from commit 1acaf2aabe)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
This commit is contained in:
Brian Goff 2019-07-12 15:29:57 -07:00 committed by Sebastiaan van Stijn
parent 879fba29d5
commit 3833f2a60b
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1 changed files with 9 additions and 3 deletions
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10
libcontainerd/remote/client.go
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@ -703,11 +703,17 @@ func (c *client) processEventStream(ctx context.Context, ns string) {
errStatus, ok := status.FromError(err)
if !ok || errStatus.Code() != codes.Canceled {
c.logger.WithError(err).Error("failed to get event")
// rate limit
select {
case <-time.After(time.Second):
go c.processEventStream(ctx, ns)
} else {
c.logger.WithError(ctx.Err()).Info("stopping event stream following graceful shutdown")
return
case <-ctx.Done():
}
}
c.logger.WithError(ctx.Err()).Info("stopping event stream following graceful shutdown")
}
return
case ev = <-eventStream:
if ev.Event == nil {