带有GVisor的Pubsub Pull订阅（云运行）问题

Question

I would like to pull a Google PubSub subscription with Go. It works well locally but when I deploy it on Cloud Run, impossible to pull any message.

Here my code snippet

func (pubSubService *pubSubService) Received() (msgArray []*pubsub.Message, err error) {
    ctx := context.Background()
    cctx, cancel := context.WithCancel(ctx)
    msgArray = []*pubsub.Message{}

    var receivedMessage = make(chan *pubsub.Message)

    go func() {
        for {
            select {
            case msg := <-receivedMessage:
                msgArray = append(msgArray, msg)
            case <-time.After(pubSubService.waitTimeOutInMillis * time.Millisecond):
                cancel()
            }
        }
    }()

    err = pubSubService.client.Subscription(pubSubService.subscriptionName).Receive(cctx, func(ctx context.Context, msg *pubsub.Message) {
        receivedMessage <- msg
        msg.Ack()
    })
    if err != nil {
        return
    }

    return
}

Here the log error

D  Container Sandbox Limitation: Unsupported syscall setsockopt(0x7,0x6,0x12,0xc00006f204,0x4,0x0) 
D  Container Sandbox Limitation: Unsupported syscall setsockopt(0x5,0x6,0x12,0xc0003c1204,0x4,0x0) 
D  Container Sandbox Limitation: Unsupported syscall setsockopt(0xa,0x6,0x12,0xc0003bd204,0x4,0x0) 
D  Container Sandbox Limitation: Unsupported syscall setsockopt(0xc,0x6,0x12,0xc00037d204,0x4,0x0) 
D  Container Sandbox Limitation: Unsupported syscall setsockopt(0x6,0x6,0x12,0xc0002d3204,0x4,0x0) 
D  Container Sandbox Limitation: Unsupported syscall setsockopt(0x8,0x6,0x12,0xc00052b204,0x4,0x0) 
D  Container Sandbox Limitation: Unsupported syscall setsockopt(0x9,0x6,0x12,0xc000391204,0x4,0x0) 
D  Container Sandbox Limitation: Unsupported syscall setsockopt(0xb,0x6,0x12,0xc00043b204,0x4,0x0) 
D  Container Sandbox Limitation: Unsupported syscall setsockopt(0x6,0x6,0x12,0xc0003b3204,0x4,0x0) 
D  Container Sandbox Limitation: Unsupported syscall setsockopt(0xc,0x6,0x12,0xc0003d3204,0x4,0x0) 
D  Container Sandbox Limitation: Unsupported syscall setsockopt(0x7,0x6,0x12,0xc000391204,0x4,0x0) 
D  Container Sandbox Limitation: Unsupported syscall setsockopt(0x5,0x6,0x12,0xc000309204,0x4,0x0) 
D  Container Sandbox Limitation: Unsupported syscall setsockopt(0xb,0x6,0x12,0xc0004d3204,0x4,0x0) 

The Received call is filter by the GVisor sandbox of Cloud Run

Do you know workarround or ReceiveSetting to set for this issue ? Thanks in advance.

Answer 1

Pull subscription doesn't work in Cloud Run because the container gets throttled or even terminated out of request scope.

The goroutine is not able to proceed.