我将Docker配置为使用docker-compose.yml运行Postgres和Django并且它运行正常。
我遇到的麻烦是Selenium无法连接到Django liveserver。
现在（至少对我而言）django必须访问selenium才能控制浏览器，而selenium必须访问django才能访问服务器。
我尝试过使用码头工作大使＆＃39;从这里使用docker-compose.yml的以下配置模式：https://github.com/docker/compose/issues/666
postgis:
dockerfile: ./docker/postgis/Dockerfile
build: .
container_name: postgis
django-ambassador:
container_name: django-ambassador
image: cpuguy83/docker-grand-ambassador
volumes:
- "/var/run/docker.sock:/var/run/docker.sock"
command: "-name django -name selenium"
django:
dockerfile: ./docker/Dockerfile-dev
build: .
command: python /app/project/manage.py test my-app
container_name: django
volumes:
- .:/app
ports:
- "8000:8000"
- "8081:8081"
links:
- postgis
- "django-ambassador:selenium"
environment:
- SELENIUM_HOST=http://selenium:4444/wd/hub
selenium:
container_name: selenium
image: selenium/standalone-firefox-debug
ports:
- "4444:4444"
- "5900:5900"
links:
- "django-ambassador:django"
当我查看http://DOCKER-MACHINE-IP:4444/wd/hub/static/resource/hub.html时 我可以看到firefox启动，但所有测试都失败，因为firefox无法连接到django
'Firefox can't establish a connection to the server at localhost:8081'
我也在这里试过这个解决方案https://github.com/docker/compose/issues/1991 但这不起作用，因为我无法同时连接到postgis和selenium的django
'django.db.utils.OperationalError: could not translate host name "postgis" to address: Name or service not known'
我尝试使用下面列出的网络功能
postgis:
dockerfile: ./docker/postgis/Dockerfile
build: .
container_name: postgis
net: appnet
django:
dockerfile: ./docker/Dockerfile-dev
build: .
command: python /app/project/manage.py test foo
container_name: django
volumes:
- .:/app
ports:
- "8000:8000"
- "8081:8081"
net: appnet
environment:
- SELENIUM_HOST=http://selenium:4444/wd/hub
selenium:
container_name: selenium
image: selenium/standalone-firefox-debug
ports:
- "4444:4444"
- "5900:5900"
net: appnet
但结果是相同的
'Firefox can't establish a connection to the server at localhost:8081'
那么如何让selenium连接到django？
我已经玩了好几天 - 非常感谢任何帮助。
更多信息
另一个奇怪的事情是，当测试服务器运行而不是时使用docker（使用我的旧配置的virtualenv等），如果我运行./manage.py test foo，我可以通过任何方式访问服务器浏览器http://localhost:8081并提供网页，但是当我在docker下运行等效命令时，我无法访问测试服务器。这是奇怪的原因我映射端口8081：8081 - 这是相关的吗？
注意：我使用的是OSX和Docker v1.9.1
答案 0 :(得分：2)
我最终提出了一个更好的解决方案，不需要我对IP地址进行硬编码。下面是我用django和docker运行测试的配置。
# docker-compose base file for everything
version: '2'
services:
postgis:
build:
context: .
dockerfile: ./docker/postgis/Dockerfile
container_name: postgis
volumes:
# If you are using boot2docker, postgres data has to live in the VM for now until #581 fixed
# for more info see here: https://github.com/boot2docker/boot2docker/issues/581
- /data/dev/docker_cookiecutter/postgres:/var/lib/postgresql/data
django:
build:
context: .
dockerfile: ./docker/django/Dockerfile
container_name: django
volumes:
- .:/app
depends_on:
- selenium
- postgis
environment:
- SITE_DOMAIN=django
- DJANGO_SETTINGS_MODULE=settings.my_dev_settings
links:
- postgis
- mailcatcher
selenium:
container_name: selenium
image: selenium/standalone-firefox-debug:2.52.0
ports:
- "4444:4444"
- "5900:5900"
ENTRYPOINT ["/docker/django/entrypoint.sh"]
#!/bin/bash
set -e
# Now we need to get the ip address of this container so we can supply it as an environmental
# variable for django so that selenium knows what url the test server is on
# Use below or alternatively you could have used
# something like "$@ --liveserver=$THIS_DOCKER_CONTAINER_TEST_SERVER"
if [[ "'$*'" == *"manage.py test"* ]] # only add if 'manage.py test' in the args
then
# get the container id
THIS_CONTAINER_ID_LONG=`cat /proc/self/cgroup | grep 'docker' | sed 's/^.*\///' | tail -n1`
# take the first 12 characters - that is the format used in /etc/hosts
THIS_CONTAINER_ID_SHORT=${THIS_CONTAINER_ID_LONG:0:12}
# search /etc/hosts for the line with the ip address which will look like this:
# 172.18.0.4 8886629d38e6
THIS_DOCKER_CONTAINER_IP_LINE=`cat /etc/hosts | grep $THIS_CONTAINER_ID_SHORT`
# take the ip address from this
THIS_DOCKER_CONTAINER_IP=`(echo $THIS_DOCKER_CONTAINER_IP_LINE | grep -o '[0-9]\+[.][0-9]\+[.][0-9]\+[.][0-9]\+')`
# add the port you want on the end
# Issues here include: django changing port if in use (I think)
# and parallel tests needing multiple ports etc.
THIS_DOCKER_CONTAINER_TEST_SERVER="$THIS_DOCKER_CONTAINER_IP:8081"
echo "this docker container test server = $THIS_DOCKER_CONTAINER_TEST_SERVER"
export DJANGO_LIVE_TEST_SERVER_ADDRESS=$THIS_DOCKER_CONTAINER_TEST_SERVER
fi
eval "$@"
SITE_DOMAIN = 'django'
docker-compose run django ./manage.py test
答案 1 :(得分：1)
每当看到localhost时，首先尝试端口转发该端口（在VM级别）
请参阅＆＃34; Connect to a Service running inside a docker container from outside＆＃34;
VBoxManage controlvm "default" natpf1 "tcp-port8081,tcp,,8081,,8081"
VBoxManage controlvm "default" natpf1 "udp-port8081,udp,,8081,,8081"
（将default替换为泊坞机的名称：请参阅docker-machine ls）
这与docker主机级别（基于boot2docker的Linux主机）的端口映射不同
输入网络的IP地址解决了问题！
答案 2 :(得分：1)
我也一直在努力解决这个问题，最后我找到了一个适合我的解决方案。你可以尝试这样的事情：
postgis:
dockerfile: ./docker/postgis/Dockerfile
build: .
django:
dockerfile: ./docker/Dockerfile-dev
build: .
command: python /app/project/manage.py test my-app
volumes:
- .:/app
ports:
- "8000:8000"
links:
- postgis
- selenium # django can access selenium:4444, selenium can access django:8081-8100
environment:
- SELENIUM_HOST=http://selenium:4444/wd/hub
- DJANGO_LIVE_TEST_SERVER_ADDRESS=django:8081-8100 # this gives selenium the correct address
selenium:
image: selenium/standalone-firefox-debug
ports:
- "5900:5900"
我认为您不需要在selenium配置中包含端口4444。该端口默认公开，并且不需要将其映射到主机，因为django容器可以通过其链接到selenium容器直接访问它。
[编辑]我发现你不需要明确暴露django容器的8081端口。另外，我为测试服务器使用了一系列端口，因为如果测试是并行运行的，那么你可以得到一个已经在使用的地址＆＃34;错误，如here所述。