Question

我想通过Go取消Google PubSub订阅。它在本地运行良好，但是当我在Cloud Run上部署它时，就不可能提取任何消息。

这是我的代码段

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
}

这是日志错误

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)

已收到的呼叫由Cloud Run的GVisor沙箱过滤

您知道要为此问题设置的workarround或ReceiveSetting吗？预先感谢。

Answer 1

不，这是错误的。我发现了我的问题：我高估了GCP全球网络：我取消轮询的超时设置为200ms。有了这一要求，我的应用没有时间恢复取消前的第一条消息。有了2000ms的超时，它可以完美工作！

Cloud运行允许使用Go例程，但是在http请求回复后它们无法生存。

Answer 2

拉订阅在Cloud Run中不起作用，因为容器受到限制，甚至终止于请求范围之外。

goroutine无法继续。

带有GVisor的Pubsub Pull订阅（CloudRun）问题

2 个答案: