我的应用程序基于Micronaut和GraalVM(java 11)，并简单地调用了http://httpbin.org/get:
@Controller("/api")
class HelloWorld(
@Client("http://httpbin.org")
private val httpClient: RxHttpClient
) {
private val logger = LoggerFactory.getLogger(javaClass)
@Get("/hello")
fun hello(): String {
return "Hello World!"
}
@Get("/fb")
fun fb(): Flowable<String> {
logger.info("Trying to call FB")
logger.info("Using url http://httpbin.org/get")
try {
return httpClient.retrieve("/get")
.doOnError { logger.error("Error calling fb api flowable", it) }
.doFinally { logger.info("Finished calling FB api flowable") }
} catch (ex: Exception) {
logger.error("Error calling fb api", ex)
throw ex
} finally {
logger.info("Finished calling fb api")
}
}
}
当我使用此Dockerfile构建应用的Docker镜像时:
FROM maven:3.6.3-jdk-11 as maven
COPY . /home/app
WORKDIR /home/app
RUN mvn package
FROM oracle/graalvm-ce:19.3.1-java11 as graalvm
COPY --from=maven /home/app/target/app-*.jar /home/app/
WORKDIR /home/app
RUN gu install native-image
RUN native-image --no-server --enable-http --enable-https -cp app-*.jar
FROM debian:stretch
EXPOSE 8080
COPY --from=graalvm /home/app/app .
#RUN apt-get update && apt-get -y install strace
ENTRYPOINT ["./app"]
一切都在我的本地环境中进行。
但是，当我将镜像推送到Google Cloud Repository时，将其部署到Cloud Run并尝试访问端点
/api/fb，它使容器崩溃，并显示503 Service Unavailable。日志中的错误是“请求失败，因为与实例的HTTP连接出错。”。当我启用strace时，这些是日志:
A 2020-02-07T12:04:27.443115Z [pid 18] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out)
A 2020-02-07T12:04:27.443125Z [pid 18] futex(0x3e61dc018a80, FUTEX_WAKE_PRIVATE, 1) = 0
A 2020-02-07T12:04:27.443357Z [pid 18] futex(0x3e62040009c4, FUTEX_CMP_REQUEUE_PRIVATE, 1, 2147483647, 0x3e6204000990, 234) = 1
A 2020-02-07T12:04:27.443369Z [pid 15] <... futex resumed> ) = 0
A 2020-02-07T12:04:27.443440Z [pid 18] futex(0x3e61dc018ab4, FUTEX_WAIT_BITSET_PRIVATE, 157, {tv_sec=3624, tv_nsec=391761056}, 0xffffffff <unfinished ...>
A 2020-02-07T12:04:27.443478Z [pid 15] futex(0x3e6204000990, FUTEX_WAKE_PRIVATE, 1) = 0
A 2020-02-07T12:04:27.959629Z [pid 20] epoll_wait(17, <unfinished ...>
A 2020-02-07T12:04:27.959658Z [pid 8] <... epoll_wait resumed> [{EPOLLIN, {u32=53, u64=53}}], 1024, -1) = 1
A 2020-02-07T12:04:27.959865Z [pid 8] accept(53, {sa_family=AF_INET6, sin6_port=htons(36294), inet_pton(AF_INET6, "::ffff:169.254.8.129", &sin6_addr), sin6_flowinfo=htonl(0), sin6_scope_id=0}, [28]) = 4
A 2020-02-07T12:04:27.959884Z [pid 8] fcntl(4, F_GETFL) = 0x2 (flags O_RDWR)
A 2020-02-07T12:04:27.959945Z [pid 8] getsockname(4, {sa_family=AF_INET6, sin6_port=htons(8080), inet_pton(AF_INET6, "::ffff:169.254.8.130", &sin6_addr), sin6_flowinfo=htonl(0), sin6_scope_id=0}, [28]) = 0
A 2020-02-07T12:04:27.960036Z [pid 8] getsockname(4, {sa_family=AF_INET6, sin6_port=htons(8080), inet_pton(AF_INET6, "::ffff:169.254.8.130", &sin6_addr), sin6_flowinfo=htonl(0), sin6_scope_id=0}, [28]) = 0
A 2020-02-07T12:04:27.960085Z [pid 8] fcntl(4, F_GETFL) = 0x2 (flags O_RDWR)
A 2020-02-07T12:04:27.960128Z [pid 8] fcntl(4, F_SETFL, O_RDWR|O_NONBLOCK) = 0
A 2020-02-07T12:04:27.960211Z [pid 8] setsockopt(4, SOL_TCP, TCP_NODELAY, [1], 4) = 0
A 2020-02-07T12:04:27.960322Z [pid 8] getsockopt(4, SOL_SOCKET, SO_SNDBUF, [1048576], [4]) = 0
A 2020-02-07T12:04:27.960440Z [pid 8] mmap(NULL, 8392704, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x3e60f0e00000
A 2020-02-07T12:04:27.960564Z [pid 8] mprotect(0x3e60f0e00000, 4096, PROT_NONE) = 0
A 2020-02-07T12:04:27.960793Z [pid 8] clone(/usr/bin/strace: Process 22 attached
A 2020-02-07T12:04:27.960875Z <unfinished ...>
A 2020-02-07T12:04:27.965711Z [pid 22] set_robust_list(0x3e60f16009e0, 24 <unfinished ...>
A 2020-02-07T12:04:27.965738Z [pid 8] <... clone resumed> child_stack=0x3e60f15fffb0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tidptr=0x3e60f16009d0, tls=0x3e60f1600700, child_tidptr=0x3e60f16009d0) = 22
A 2020-02-07T12:04:27.965753Z [pid 22] <... set_robust_list resumed> ) = -1 ENOSYS (Function not implemented)
A 2020-02-07T12:04:27.965761Z [pid 8] epoll_wait(29, <unfinished ...>
A 2020-02-07T12:04:27.965770Z [pid 22] sched_getaffinity(22, 32, [0, 1]) = 8
A 2020-02-07T12:04:27.965783Z [pid 22] futex(0x3b4c0c4, FUTEX_CMP_REQUEUE_PRIVATE, 1, 2147483647, 0x3b4c068, 30) = 1
A 2020-02-07T12:04:27.965790Z [pid 3] <... futex resumed> ) = 0
A 2020-02-07T12:04:27.965799Z [pid 3] futex(0x3b4c068, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...>
A 2020-02-07T12:04:27.965807Z [pid 22] futex(0x3b4c068, FUTEX_WAKE_PRIVATE, 1) = 1
A 2020-02-07T12:04:27.965816Z [pid 22] mmap(NULL, 2097152, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 <unfinished ...>
A 2020-02-07T12:04:27.965824Z [pid 3] <... futex resumed> ) = 0
A 2020-02-07T12:04:27.965833Z [pid 3] futex(0x3b4c068, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
A 2020-02-07T12:04:27.965842Z [pid 22] <... mmap resumed> ) = 0x3e60f0c00000
A 2020-02-07T12:04:27.965850Z [pid 3] <... futex resumed> ) = 0
A 2020-02-07T12:04:27.965858Z [pid 3] futex(0x3b4c0c4, FUTEX_WAIT_PRIVATE, 31, NULL <unfinished ...>
A 2020-02-07T12:04:27.965866Z [pid 22] munmap(0x3e60f0d00000, 1048576) = 0
A 2020-02-07T12:04:27.965874Z [pid 22] prctl(PR_SET_NAME, "ntLoopGroup-1-7"...) = 0
A 2020-02-07T12:04:27.965882Z [pid 22] epoll_wait(20, [], 1024, 0) = 0
A 2020-02-07T12:04:27.965891Z [pid 22] mmap(NULL, 2097152, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x3e60f0a00000
A 2020-02-07T12:04:27.965903Z [pid 22] munmap(0x3e60f0b00000, 1048576) = 0
A 2020-02-07T12:04:27.966731Z [pid 22] epoll_ctl(20, EPOLL_CTL_ADD, 4, {EPOLLIN, {u32=4, u64=4}}) = 0
A 2020-02-07T12:04:27.966836Z [pid 22] epoll_wait(20, [{EPOLLIN, {u32=4, u64=4}}], 1024, 299996) = 1
A 2020-02-07T12:04:27.967306Z [pid 22] mmap(NULL, 2097152, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x3e60f0800000
A 2020-02-07T12:04:27.967325Z [pid 22] munmap(0x3e60f0900000, 1048576) = 0
A 2020-02-07T12:04:27.967493Z [pid 22] mmap(NULL, 16781312, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x3e60ef600000
A 2020-02-07T12:04:27.984977Z [pid 22] read(4, "GET /api/fb HTTP/1.1\r\nhost: app"..., 1024) = 864
A 2020-02-07T12:04:27.985474Z [36m12:04:27.985[0;39m [1;30m[nioEventLoopGroup-1-7][0;39m [34mINFO [0;39m [35mcom.roihunter.app.HelloWorld[0;39m - Trying to call FB
A 2020-02-07T12:04:27.985581Z [36m12:04:27.985[0;39m [1;30m[nioEventLoopGroup-1-7][0;39m [34mINFO [0;39m [35mcom.roihunter.app.HelloWorld[0;39m - Using url /act_984750788289990/insights
A 2020-02-07T12:04:27.985645Z [pid 22] write(1, "\33[36m12:04:27.985\33[0;39m \33[1;30m"..., 143) = 143
A 2020-02-07T12:04:27.985666Z [pid 22] write(1, "\33[36m12:04:27.985\33[0;39m \33[1;30m"..., 165) = 165
A 2020-02-07T12:04:27.985766Z [36m12:04:27.985[0;39m [1;30m[nioEventLoopGroup-1-7][0;39m [34mINFO [0;39m [35mcom.roihunter.app.HelloWorld[0;39m - Finished calling fb api
A 2020-02-07T12:04:27.985836Z [pid 22] write(1, "\33[36m12:04:27.985\33[0;39m \33[1;30m"..., 149) = 149
A 2020-02-07T12:04:27.986363Z [pid 22] write(4, "HTTP/1.1 200 OK\r\ntransfer-encodi"..., 143) = 143
E 2020-02-07T12:04:27.988626Z GET 503 546 B 31 ms curl/7.66.0 https://app-5phkf6s3jq-ez.a.run.app/api/fb GET 503 546 B 31 ms curl/7.66.0
A 2020-02-07T12:04:27.989104Z [pid 22] writev(4, [{iov_base="1\r\n", iov_len=3}, {iov_base="[", iov_len=1}, {iov_base="\r\n", iov_len=2}], 3) = 6
A 2020-02-07T12:04:27.989513Z [pid 22] mmap(NULL, 8392704, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x3e60eec00000
A 2020-02-07T12:04:27.989534Z [pid 22] mprotect(0x3e60eec00000, 4096, PROT_NONE) = 0
A 2020-02-07T12:04:27.989732Z [pid 22] clone(/usr/bin/strace: Process 23 attached
A 2020-02-07T12:04:27.989753Z <unfinished ...>
A 2020-02-07T12:04:27.989873Z [pid 23] set_robust_list(0x3e60ef4009e0, 24) = -1 ENOSYS (Function not implemented)
A 2020-02-07T12:04:27.989884Z [pid 23] sched_getaffinity(23, 32, [0, 1]) = 8
A 2020-02-07T12:04:27.989964Z [pid 23] futex(0x3b4c0c4, FUTEX_CMP_REQUEUE_PRIVATE, 1, 2147483647, 0x3b4c068, 32) = 1
A 2020-02-07T12:04:27.990286Z [pid 23] mmap(NULL, 2097152, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 <unfinished ...>
A 2020-02-07T12:04:27.990303Z [pid 22] <... clone resumed> child_stack=0x3e60ef3fffb0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tidptr=0x3e60ef4009d0, tls=0x3e60ef400700, child_tidptr=0x3e60ef4009d0) = 23
A 2020-02-07T12:04:27.990311Z [pid 23] <... mmap resumed> ) = 0x3e60eea00000
A 2020-02-07T12:04:27.990320Z [pid 3] <... futex resumed> ) = 0
A 2020-02-07T12:04:27.990327Z [pid 3] futex(0x3b4c068, FUTEX_WAKE_PRIVATE, 1) = 0
A 2020-02-07T12:04:27.990335Z [pid 3] futex(0x3b4c0c4, FUTEX_WAIT_PRIVATE, 33, NULL <unfinished ...>
A 2020-02-07T12:04:27.990345Z [pid 23] munmap(0x3e60eeb00000, 1048576) = 0
A 2020-02-07T12:04:27.990423Z [pid 22] socket(AF_INET6, SOCK_STREAM, IPPROTO_IP <unfinished ...>
A 2020-02-07T12:04:27.990435Z [pid 23] prctl(PR_SET_NAME, "ionThreadPool-1"... <unfinished ...>
A 2020-02-07T12:04:27.990446Z [pid 22] <... socket resumed> ) = 80
A 2020-02-07T12:04:27.990668Z [pid 22] setsockopt(80, SOL_IPV6, IPV6_V6ONLY, [0], 4) = 0
A 2020-02-07T12:04:27.990684Z [pid 23] <... prctl resumed> ) = 0
我尝试使用其他库进行调用，即Java 11 Http客户端，它可以正常工作。但是，无论我做什么，当我使用Micronaut Http客户端时都无法正常工作，并且没有任何有用的消息。
我还尝试在docker镜像中使用Java 8(一种不同的Linux发行版)(fedora:latest，ubuntu:latest)，但没有帮助。
您有什么可能的原因吗？
感谢您提前答复。
最佳答案
因此，问题的核心似乎是Cloud Run当前不支持HTTP流传输:
https://cloud.google.com/run/docs/issues#grpc_websocket
当我返回带有Micronauts的Flowable时，它正在打开一个流式HTTP连接。因此，解决方案是不使用Flowable(或任何其他不受限制的发布服务器，例如Flow，Flux等)作为响应。
关于kotlin - 使用Micronaut HTTP客户端时，Cloud Run应用程序将使用 “503 Service Unavailable”进行响应，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/60116001/