我按照django频道教程构建了一个简单的聊天应用程序。 https://channels.readthedocs.io/en/latest/tutorial/part_1.html ， 它可以在没有docker的情况下在带Redis的本地计算机上运行。
然后，我现在想通过docker compose文件将其放入docker容器中，但是似乎应用无法连接到redis容器，我已经尝试和Google进行了两天的尝试，但是似乎所有方法都无法使用。
所以想在这里寻求帮助
文件夹结构
my_project
- mysite(django app)
- ... somefolder and files
- docker-compose.yml
- Dockfile
- requirements.txt
docker-compose.yml
version: '3'
services:
app:
build:
# current directory
context: .
ports:
#host to image
- "8000:8000"
volumes:
# map directory to image, which means if something changed in
# current directory, it will automatically reflect on image,
# don't need to restart docker to get the changes into effect
- ./mysite:/mysiteRoot/mysite
command: >
sh -c "
python3 manage.py makemigrations &&
python3 manage.py migrate &&
python3 manage.py runserver 0.0.0.0:8000"
depends_on:
- redis
redis:
image: redis:5.0.5-alpine
ports:
#host to image
- "6379:6379"
Dockfile
FROM python:3.7-alpine
MAINTAINER Aaron Wei.
ENV PYTHONUNBUFFERED 1
EXPOSE 8000
# Setup directory structure
RUN mkdir /mysiteRoot
WORKDIR /mysiteRoot/mysite/
# Install dependencies
COPY ./requirements.txt /mysiteRoot/requirements.txt
RUN apk add --update --no-cache postgresql-client
RUN apk add --update --no-cache --virtual .tmp-build-deps \
gcc libc-dev linux-headers postgresql-dev
RUN apk add build-base python-dev py-pip jpeg-dev zlib-dev
ENV LIBRARY_PATH=/lib:/usr/lib
RUN pip install -r /mysiteRoot/requirements.txt
RUN apk del .tmp-build-deps
# Copy application
COPY ./mysite/ /mysiteRoot/mysite/
RUN adduser -D user
USER user
Django设置文件
"""
Django settings for mysite project.
Generated by 'django-admin startproject' using Django 2.2.2.
For more information on this file, see
https://docs.djangoproject.com/en/2.2/topics/settings/
For the full list of settings and their values, see
https://docs.djangoproject.com/en/2.2/ref/settings/
"""
import os
# Build paths inside the project like this: os.path.join(BASE_DIR, ...)
BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
# Quick-start development settings - unsuitable for production
# See https://docs.djangoproject.com/en/2.2/howto/deployment/checklist/
# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = 's0d^&2@s^126#6dsm7u4-t9pg03)if$dq##xxouht)#%#=o)r0'
# SECURITY WARNING: don't run with debug turned on in production!
DEBUG = True
ALLOWED_HOSTS = ['0.0.0.0']
# Application definition
INSTALLED_APPS = [
'django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'channels',
'chat',
]
MIDDLEWARE = [
'django.middleware.security.SecurityMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.common.CommonMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'django.middleware.clickjacking.XFrameOptionsMiddleware',
]
ROOT_URLCONF = 'mysite.urls'
TEMPLATES = [
{
'BACKEND': 'django.template.backends.django.DjangoTemplates',
'DIRS': [],
'APP_DIRS': True,
'OPTIONS': {
'context_processors': [
'django.template.context_processors.debug',
'django.template.context_processors.request',
'django.contrib.auth.context_processors.auth',
'django.contrib.messages.context_processors.messages',
],
},
},
]
WSGI_APPLICATION = 'mysite.wsgi.application'
ASGI_APPLICATION = 'mysite.routing.application'
CHANNEL_LAYERS = {
'default': {
'BACKEND': 'channels_redis.core.RedisChannelLayer',
'CONFIG': {
"hosts": [('0.0.0.0', 6379)],
},
},
}
# Database
# https://docs.djangoproject.com/en/2.2/ref/settings/#databases
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.sqlite3',
'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
}
}
# Password validation
# https://docs.djangoproject.com/en/2.2/ref/settings/#auth-password-validators
AUTH_PASSWORD_VALIDATORS = [
{
'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
},
{
'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
},
{
'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
},
{
'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
},
]
# Internationalization
# https://docs.djangoproject.com/en/2.2/topics/i18n/
LANGUAGE_CODE = 'en-us'
TIME_ZONE = 'UTC'
USE_I18N = True
USE_L10N = True
USE_TZ = True
# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/2.2/howto/static-files/
STATIC_URL = '/static/'
docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
7966fe4962f7 tourmama_copy_app "sh -c '\n pyth…" 21 minutes ago Up 20 minutes 0.0.0.0:8000->8000/tcp tourmama_copy_app_1
61446d04c4b2 redis:5.0.5-alpine "docker-entrypoint.s…" 27 minutes ago Up 20 minutes 0.0.0.0:6379->6379/tcp tourmama_copy_redis_1
然后控制台中的错误显示：
app_1 | HTTP GET /chat/dadas/ 200 [0.01, 172.19.0.1:39468]
app_1 | WebSocket HANDSHAKING /ws/chat/dadas/ [172.19.0.1:39470]
app_1 | Exception inside application: [Errno 111] Connect call failed ('0.0.0.0', 6379)
app_1 | File "/usr/local/lib/python3.7/site-packages/channels/sessions.py", line 179, in __call__
app_1 | return await self.inner(receive, self.send)
app_1 | File "/usr/local/lib/python3.7/site-packages/channels/middleware.py", line 41, in coroutine_call
app_1 | await inner_instance(receive, send)
app_1 | File "/usr/local/lib/python3.7/site-packages/channels/consumer.py", line 59, in __call__
app_1 | [receive, self.channel_receive], self.dispatch
app_1 | File "/usr/local/lib/python3.7/site-packages/channels/utils.py", line 59, in await_many_dispatch
app_1 | await task
app_1 | File "/usr/local/lib/python3.7/site-packages/channels_redis/core.py", line 425, in receive
app_1 | real_channel
app_1 | File "/usr/local/lib/python3.7/site-packages/channels_redis/core.py", line 477, in receive_single
app_1 | index, channel_key, timeout=self.brpop_timeout
app_1 | File "/usr/local/lib/python3.7/site-packages/channels_redis/core.py", line 324, in _brpop_with_clean
app_1 | async with self.connection(index) as connection:
app_1 | File "/usr/local/lib/python3.7/site-packages/channels_redis/core.py", line 813, in __aenter__
app_1 | self.conn = await self.pool.pop()
app_1 | File "/usr/local/lib/python3.7/site-packages/channels_redis/core.py", line 70, in pop
app_1 | conns.append(await aioredis.create_redis(**self.host, loop=loop))
app_1 | File "/usr/local/lib/python3.7/site-packages/aioredis/commands/__init__.py", line 178, in create_redis
app_1 | loop=loop)
app_1 | File "/usr/local/lib/python3.7/site-packages/aioredis/connection.py", line 108, in create_connection
app_1 | timeout, loop=loop)
app_1 | File "/usr/local/lib/python3.7/asyncio/tasks.py", line 388, in wait_for
app_1 | return await fut
app_1 | File "/usr/local/lib/python3.7/site-packages/aioredis/stream.py", line 19, in open_connection
app_1 | lambda: protocol, host, port, **kwds)
app_1 | File "/usr/local/lib/python3.7/asyncio/base_events.py", line 959, in create_connection
app_1 | raise exceptions[0]
app_1 | File "/usr/local/lib/python3.7/asyncio/base_events.py", line 946, in create_connection
app_1 | await self.sock_connect(sock, address)
app_1 | File "/usr/local/lib/python3.7/asyncio/selector_events.py", line 464, in sock_connect
app_1 | return await fut
app_1 | File "/usr/local/lib/python3.7/asyncio/selector_events.py", line 494, in _sock_connect_cb
app_1 | raise OSError(err, f'Connect call failed {address}')
app_1 | [Errno 111] Connect call failed ('0.0.0.0', 6379)
app_1 | WebSocket DISCONNECT /ws/chat/dadas/ [172.19.0.1:39470]
有人知道如何从应用程序连接到Redis容器吗？ 谢谢！
答案 0 :(得分：0)
您应该更改：
CHANNEL_LAYERS = {
'default': {
'BACKEND': 'channels_redis.core.RedisChannelLayer',
'CONFIG': {
"hosts": [('0.0.0.0', 6379)],
},
},
}
到
CHANNEL_LAYERS = {
'default': {
'BACKEND': 'channels_redis.core.RedisChannelLayer',
'CONFIG': {
"hosts": [('redis', 6379)],
},
},
}
在您的Django settings file中。
通过compose设置容器时，它们都已连接到compose创建的默认网络。在这种情况下，redis是redis容器的DNS名称，它将自动解析为容器ip