func (b *Box) waitLoop(ctx context.Context) {
apexctx.GetLogger(ctx).Info("start waitLoop")
var (
portoConn porto.API
err error
)
waitPattern := filepath.Join(b.rootPrefix, "*")
var waitTimeout = 30 * time.Second
closed := func(portoConn porto.API) bool {
select {
case <-ctx.Done():
if portoConn != nil {
portoConn.Close()
}
return true
default:
return false
}
}
LOOP:
for {
apexctx.GetLogger(ctx).Info("next iteration of waitLoop")
if closed(portoConn) {
return
}
// Connect to Porto if we have not connected yet.
// In case of error: wait either a fixed timeout or closing of Box
if portoConn == nil {
apexctx.GetLogger(ctx).Info("waitLoop: connect to Portod")
portoConn, err = portoConnect()
if err != nil {
apexctx.GetLogger(ctx).WithError(err).Warn("unable to connect to Portod")
select {
case <-time.After(time.Second):
continue LOOP
case <-ctx.Done():
return
}
}
}
// * means all containers
// if no containers dead for waitTimeout, name will be an empty string
containerName, err := portoConn.Wait([]string{waitPattern}, 30*waitTimeout)
if err != nil {
portoConn.Close()
portoConn = nil
continue LOOP
}
if containerName != "" {
apexctx.GetLogger(ctx).Infof("Wait reports %s to be dead", containerName)
b.muContainers.Lock()
container, ok := b.containers[containerName]
if ok {
delete(b.containers, containerName)
}
rest := len(b.containers)
b.muContainers.Unlock()
if ok {
if err = container.Kill(); err != nil {
apexctx.GetLogger(ctx).WithError(err).Errorf("Killing %s error", containerName)
}
}
apexctx.GetLogger(ctx).Infof("%d containers are being tracked now", rest)
}
}
}
