1

问题

我想使用 Pyro4 使用 docker-compose 跨多个容器进行远程过程调用。目前，我只是尝试实现Pyro4 仓库示例的简化版本，我已将其设置为在不同的机器上运行，而不是默认的 localhost，因为我使用了多个容器。

我可以在自己的容器中成功启动 Pyro 名称服务器，但在另一个容器中我无法发布 Warehouse 类并启动 Pyro 的请求循环。我得到了错误OSError: [Errno 99] Cannot assign requested address。

我的尝试和其他信息

我正在使用balena将其部署到 Raspberry Pi 3 B+，并且我有一个环境变量（balena 云中的设备变量）“PYRO_HOST=pyro-ns”来设置 pyro 名称服务器的地址。

我看到创建了 pyro 名称服务器

05.02.20 15:27:33 (-0500)  pyro-ns  Broadcast server running on 0.0.0.0:9091
05.02.20 15:27:33 (-0500)  pyro-ns  NS running on pyro-ns:9090 (172.17.0.3)
05.02.20 15:27:33 (-0500)  pyro-ns  Warning: HMAC key not set. Anyone can connect to this server!
05.02.20 15:27:33 (-0500)  pyro-ns  URI = PYRO:Pyro.NameServer@pyro-ns:9090

但是，OSError: [Errno 99] Cannot assign requested address当我尝试发布 Warehouse 类并使用启动 Pyro 的请求循环时出现错误

        Pyro4.Daemon.serveSimple(
        {
            Warehouse: "example.warehouse"
        },
        ns=True, verbose=True)

我得到以下

05.02.20 16:52:00 (-0500)  container_B  Traceback (most recent call last):
05.02.20 16:52:00 (-0500)  container_B    File "src/container_B_main.py", line 33, in <module>
05.02.20 16:52:00 (-0500)  container_B      main()
05.02.20 16:52:00 (-0500)  container_B    File "src/container_B_main.py", line 30, in main
05.02.20 16:52:00 (-0500)  container_B      ns=True, verbose=True)
05.02.20 16:52:00 (-0500)  container_B    File "/usr/local/lib/python3.5/site-packages/Pyro4/core.py", line 1204, in serveSimple
05.02.20 16:52:00 (-0500)  container_B      daemon = Daemon(host, port)
05.02.20 16:52:00 (-0500)  container_B    File "/usr/local/lib/python3.5/site-packages/Pyro4/core.py", line 1141, in __init__
05.02.20 16:52:00 (-0500)  container_B      self.transportServer.init(self, host, port, unixsocket)
05.02.20 16:52:00 (-0500)  container_B    File "/usr/local/lib/python3.5/site-packages/Pyro4/socketserver/threadpoolserver.py", line 134, in init
05.02.20 16:52:00 (-0500)  container_B      sslContext=sslContext)
05.02.20 16:52:00 (-0500)  container_B    File "/usr/local/lib/python3.5/site-packages/Pyro4/socketutil.py", line 298, in createSocket
05.02.20 16:52:00 (-0500)  container_B      bindOnUnusedPort(sock, bind[0])
05.02.20 16:52:00 (-0500)  container_B    File "/usr/local/lib/python3.5/site-packages/Pyro4/socketutil.py", line 542, in bindOnUnusedPort
05.02.20 16:52:00 (-0500)  container_B      sock.bind((host, 0))
05.02.20 16:52:00 (-0500)  container_B  OSError: [Errno 99] Cannot assign requested address

我缺少什么可以让 Pyro 使用 docker-compose 在多个容器中工作？

以下是我的代码：

码头工人-compose.yml

version: '2'
services:
    pyro-ns:
        privileged: true
        restart: always
        build: ./pyro-ns
        ports:
            - "9090:9090"
    container_A:
        privileged: true
        restart: always
        build: ./container_A
        depends_on:
            - pyro-ns
            - container_B
    container_B:
        privileged: true
        restart: always
        build: ./container_B
        depends_on:
            - pyro-ns

pyrons

Dockerfile.template

FROM balenalib/%%BALENA_MACHINE_NAME%%-python:3-stretch-run

# enable container init system.
ENV INITSYSTEM on

# use `install_packages` if you need to install dependencies,
# for instance if you need git, just uncomment the line below.
# RUN install_packages git
RUN pip install --upgrade pip
RUN pip install Pyro4 dill

ENV PYRO_SERIALIZERS_ACCEPTED=serpent,json,marshal,pickle,dill
ENV PYTHONUNBUFFERED=0

CMD ["python", "-m", "Pyro4.naming"]

EXPOSE 9090

容器_A

Dockerfile.template

FROM balenalib/%%BALENA_MACHINE_NAME%%-python:3-stretch-run

# enable container init system.
ENV INITSYSTEM on

# use `install_packages` if you need to install dependencies,
# for instance if you need git, just uncomment the line below.
# RUN install_packages git
RUN pip install --upgrade pip
RUN pip install Pyro4 dill

# Set our working directory
WORKDIR /usr/src/container_A

# Copy requirements.txt first for better cache on later pushes
COPY requirements.txt requirements.txt

# pip install python deps from requirements.txt on the resin.io build server
RUN pip install -r requirements.txt

# This will copy all files in our root to the working  directory in the container
COPY . ./

# main.py will run when container starts up on the device
CMD ["python","-u","src/container_A_main.py"]

容器_A_main.py

import Pyro4
import Pyro4.util
import sys

sys.excepthook = Pyro4.util.excepthook

try:
    print('Top of container A')

    warehouse = Pyro4.Proxy("PYRONAME:example.warehouse")

    print('The warehouse contains: ', warehouse.list_contents())

except Exception as ex:
    template = "An exception of type {0} occurred. Arguments:\n{1!r}"
    message = template.format(type(ex).__name__, ex.args)
    print(message)

容器_B

Dockerfile.template

FROM balenalib/%%BALENA_MACHINE_NAME%%-python:3-stretch-run

# enable container init system.
ENV INITSYSTEM on

# use `install_packages` if you need to install dependencies,
# for instance if you need git, just uncomment the line below.
# RUN install_packages git
RUN pip install --upgrade pip

# Set our working directory
WORKDIR /usr/src/container_B

# Copy requirements.txt first for better cache on later pushes
COPY requirements.txt requirements.txt

# pip install python deps from requirements.txt on the resin.io build server
RUN pip install -r requirements.txt

# This will copy all files in our root to the working  directory in the container
COPY . ./

# container_B_main.py will run when container starts up on the device
CMD ["python","-u","src/container_B_main.py"]

容器_B_main.py

from __future__ import print_function
import Pyro4

@Pyro4.expose
@Pyro4.behavior(instance_mode="single")
class Warehouse(object):
    def __init__(self):
        self.contents = ["chair", "bike", "flashlight", "laptop", "couch"]

    def list_contents(self):
        return self.contents

    def take(self, name, item):
        self.contents.remove(item)
        print("{0} took the {1}.".format(name, item))

    def store(self, name, item):
        self.contents.append(item)
        print("{0} stored the {1}.".format(name, item))


def main():
    #Pyro4.config.HOST = "pyro-ns"
    Pyro4.Daemon.serveSimple(
        {
            Warehouse: "example.warehouse"
        },
        ns=True, verbose=True)

if __name__ == "__main__":
    main()

对于container_A和container_B，requirements.txt 文件是相同的。

要求.txt

Pyro4
4

1 回答 1

1

在 balena 论坛的帮助下，我成功地运行了我的 Pyro 示例。

以下是我的更新和工作文件供参考。

---

码头工人-compose.yml

version: '2'
services:
    pyro-ns:
        privileged: true
        restart: always
        build: ./pyro-ns
        command: ["--host=pyro-ns"]
    container_A:
        privileged: true
        restart: always
        build: ./container_A
        depends_on:
            - pyro-ns
            - container_B
    container_B:
        privileged: true
        restart: always
        build: ./container_B
        depends_on:
            - pyro-ns

pyrons

Dockerfile.template

FROM balenalib/%%BALENA_MACHINE_NAME%%-python:3-stretch-run

# enable container init system.
ENV INITSYSTEM on

# use `install_packages` if you need to install dependencies,
# for instance if you need git, just uncomment the line below.
# RUN install_packages git
RUN pip install --upgrade pip
RUN pip install Pyro4 dill

ENV PYRO_SERIALIZERS_ACCEPTED=serpent,json,marshal,pickle,dill
ENV PYTHONUNBUFFERED=0

ENTRYPOINT ["pyro4-ns"]

EXPOSE 9090

容器_A

Dockerfile.template

FROM balenalib/%%BALENA_MACHINE_NAME%%-python:3-stretch-run

# enable container init system.
ENV INITSYSTEM on

# use `install_packages` if you need to install dependencies,
# for instance if you need git, just uncomment the line below.
# RUN install_packages git
RUN pip install --upgrade pip
RUN pip install Pyro4 dill

# Set our working directory
WORKDIR /usr/src/container_A

# Copy requirements.txt first for better cache on later pushes
COPY requirements.txt requirements.txt

# pip install python deps from requirements.txt on the resin.io build server
RUN pip install -r requirements.txt

# This will copy all files in our root to the working  directory in the container
COPY . ./

# main.py will run when container starts up on the device
CMD ["python","-u","src/container_A_main.py"]

容器_A_main.py

import Pyro4
import Pyro4.util
import sys

sys.excepthook = Pyro4.util.excepthook

try:
    print('Top of container A')

    warehouse = Pyro4.Proxy("PYRONAME:example.warehouse")

    print('The warehouse contains: ', warehouse.list_contents())

    print('Inifite loop after running the Warehouse class via Pyro4')
    while True:
        # Infinite loop.
        pass

except Exception as ex:
    template = "An exception of type {0} occurred. Arguments:\n{1!r}"
    message = template.format(type(ex).__name__, ex.args)
    print(message)

容器_B

Dockerfile.template

FROM balenalib/%%BALENA_MACHINE_NAME%%-python:3-stretch-run

# enable container init system.
ENV INITSYSTEM on

# use `install_packages` if you need to install dependencies,
# for instance if you need git, just uncomment the line below.
# RUN install_packages git
RUN pip install --upgrade pip

# Set our working directory
WORKDIR /usr/src/container_B

# Copy requirements.txt first for better cache on later pushes
COPY requirements.txt requirements.txt

# pip install python deps from requirements.txt on the resin.io build server
RUN pip install -r requirements.txt

# This will copy all files in our root to the working  directory in the container
COPY . ./

# main.py will run when container starts up on the device
CMD ["python","-u","src/container_B_main.py"]

EXPOSE 9100

容器_B_main.py

from __future__ import print_function
import Pyro4


@Pyro4.expose
@Pyro4.behavior(instance_mode="single")
class Warehouse(object):
    def __init__(self):
        self.contents = ["chair", "bike", "flashlight", "laptop", "couch"]

    def list_contents(self):
        return self.contents

    def take(self, name, item):
        self.contents.remove(item)
        print("{0} took the {1}.".format(name, item))

    def store(self, name, item):
        self.contents.append(item)
        print("{0} stored the {1}.".format(name, item))


def main():
    Pyro4.config.SERIALIZER = 'pickle'
    daemon = Pyro4.Daemon(host="container_B", port=9100)
    uri = daemon.register(Warehouse)
    print('The uri of the registered Warehouse class')
    print(uri)

    try:
        ns = Pyro4.locateNS(host="pyro-ns", port=9090)
        print('The located name server')
        print(ns)
        ns.register("example.warehouse", uri)
    except Exception as ex:
        template = "An exception of type {0} occurred. Arguments:\n{1!r}"
        message = template.format(type(ex).__name__, ex.args)
        print(message)

    daemon.requestLoop()

if __name__ == "__main__":
    main()

对于 container_A 和 container_B ，requirements.txt 文件是相同的。

要求.txt

`Pyro4`
于 2020-02-12T17:47:39.093 回答