这是我的撰写文件:
version: '2'
services:
web:
build: ./web
ports:
- "3000:3000"
links:
- api
api:
build: ./api
links:
- db
db:
image: postgres
这是我的web
服务的Dockerfile:
FROM node:8.9.3
WORKDIR /app
COPY ./package.json /app
COPY ./server /app/server
COPY ./client /app/client
EXPOSE 3000
ENV PORT 3000
RUN ["npm", "install"]
ENTRYPOINT ["npm", "start"]
而对于api
项目:
FROM python:3.6
WORKDIR /api
COPY ./requirements.txt /api/requirements.txt
COPY ./src /api/src
EXPOSE 80
ENV PORT 80
RUN ["pip", "install", "-r", "requirements.txt"]
RUN ["python", "src/main.py"]
当我运行docker-compose up
时,只有api
服务启动。但是,如果我完全注释掉api
服务并再次运行docker-compose up
,那么web
和db
服务都会启动。我如何建立api
项目有什么问题吗?我究竟做错了什么?
为了完整性,这里是web
项目的起始文件(使用Express)
http.createServer(app).listen(app.get("port"), function() {
console.log("Express server listening on port " + app.get("port"));
});
和api
proj(使用Flask):
from flask import Flask
app = Flask(__name__)
@app.route("/")
def hello():
return "Hello World!"
if __name__ == '__main__':
app.run(debug=True, host='0.0.0.0', port=80)
UPDATE
我评论了烧瓶服务器的主线,所有3个服务都可以启动。缺点是......现在我没有api服务器。 Flask是什么让其他服务无法使用?
更新2
有些人要求查看日志。
如果我从没有烧瓶开始,这是日志:
Building web
Step 1/10 : FROM node:8.9.3
---> 2eeae8debf3d
Step 2/10 : WORKDIR /app
---> Using cache
---> 02199a27dafb
Step 3/10 : COPY ./package.json /app
---> Using cache
---> fafac64ad492
Step 4/10 : COPY ./app.js /app
---> Using cache
---> 0b1e3067451b
Step 5/10 : COPY ./controllers /app/server
---> Using cache
---> ff00fa864078
Step 6/10 : COPY ./client /app/client
---> Using cache
---> 587214c84267
Step 7/10 : EXPOSE 3000
---> Using cache
---> ddd5b795fcf5
Step 8/10 : ENV PORT 3000
---> Using cache
---> ca4c37f63468
Step 9/10 : RUN npm install
---> Using cache
---> 74b289885447
Step 10/10 : ENTRYPOINT npm start
---> Using cache
---> 9c5ec6770c47
Successfully built 9c5ec6770c47
Successfully tagged testcomposemachine_web:latest
Recreating testcomposemachine_web_1
Starting testcomposemachine_db_1
Attaching to testcomposemachine_db_1, testcomposemachine_web_1
db_1 | 2017-12-28 23:11:55.861 UTC [1] LOG: listening on IPv4 address "0.0.0.0", port 5432
db_1 | 2017-12-28 23:11:55.861 UTC [1] LOG: listening on IPv6 address "::", port 5432
db_1 | 2017-12-28 23:11:55.874 UTC [1] LOG: listening on Unix socket "/var/run/postgresql/.s.PGSQL.5432"
db_1 | 2017-12-28 23:11:55.907 UTC [24] LOG: database system was shut down at 2017-12-28 22:59:27 UTC
db_1 | 2017-12-28 23:11:55.919 UTC [1] LOG: database system is ready to accept connections
web_1 |
web_1 | > [email protected] start /app
web_1 | > node app.js
web_1 |
web_1 | Express Web server listening on port 3000
如果我包括烧瓶,这是日志:
Building api
Step 1/8 : FROM python:3.6
---> c1e459c00dc3
Step 2/8 : WORKDIR /api
---> Using cache
---> 8c9da963377c
Step 3/8 : COPY ./requirements.txt /api/requirements.txt
---> Using cache
---> 654c815801f6
Step 4/8 : COPY ./src /api/src
---> 5627279f7323
Removing intermediate container 453bf031c2f7
Step 5/8 : EXPOSE 80
---> Running in efb18f950f7d
---> 1389c63a0bcb
Removing intermediate container efb18f950f7d
Step 6/8 : ENV PORT 80
---> Running in 2ad88bed6343
---> fa85201cc165
Removing intermediate container 2ad88bed6343
Step 7/8 : RUN pip install -r requirements.txt
---> Running in e19107f5a449
Collecting flask==0.12.2 (from -r requirements.txt (line 1))
Downloading Flask-0.12.2-py2.py3-none-any.whl (83kB)
Collecting itsdangerous>=0.21 (from flask==0.12.2->-r requirements.txt (line 1))
Downloading itsdangerous-0.24.tar.gz (46kB)
Collecting Werkzeug>=0.7 (from flask==0.12.2->-r requirements.txt (line 1))
Downloading Werkzeug-0.13-py2.py3-none-any.whl (311kB)
Collecting click>=2.0 (from flask==0.12.2->-r requirements.txt (line 1))
Downloading click-6.7-py2.py3-none-any.whl (71kB)
Collecting Jinja2>=2.4 (from flask==0.12.2->-r requirements.txt (line 1))
Downloading Jinja2-2.10-py2.py3-none-any.whl (126kB)
Collecting MarkupSafe>=0.23 (from Jinja2>=2.4->flask==0.12.2->-r requirements.txt (line 1))
Downloading MarkupSafe-1.0.tar.gz
Building wheels for collected packages: itsdangerous, MarkupSafe
Running setup.py bdist_wheel for itsdangerous: started
Running setup.py bdist_wheel for itsdangerous: finished with status 'done'
Stored in directory: /root/.cache/pip/wheels/fc/a8/66/24d655233c757e178d45dea2de22a04c6d92766abfb741129a
Running setup.py bdist_wheel for MarkupSafe: started
Running setup.py bdist_wheel for MarkupSafe: finished with status 'done'
Stored in directory: /root/.cache/pip/wheels/88/a7/30/e39a54a87bcbe25308fa3ca64e8ddc75d9b3e5afa21ee32d57
Successfully built itsdangerous MarkupSafe
Installing collected packages: itsdangerous, Werkzeug, click, MarkupSafe, Jinja2, flask
Successfully installed Jinja2-2.10 MarkupSafe-1.0 Werkzeug-0.13 click-6.7 flask-0.12.2 itsdangerous-0.24
---> a7be838d3a6e
Removing intermediate container e19107f5a449
Step 8/8 : RUN python src/main.py
---> Running in e86c8adf46f0
* Running on http://0.0.0.0:80/ (Press CTRL+C to quit)
请注意,如果包含烧瓶,其他容器甚至不构建?
您有一个无法在您的应用程序dockerfile中完成的RUN命令。这可以防止您的dockerfile完成构建。这就是为什么它说第8/8步并且永远不会像你的网络容器那样“成功构建”。我将最后一次运行命令移动到入口点或CMD,就像你在你的web docker文件中一样,这样docker build命令实际上可以完成。
IE CMD ["python", "src/main.py"]
或ENTRYPOINT ["python", "src/main.py"]
这很可能是阻止你的docker图像被构建的原因。是因为APP中的最后一行是你在前台启动一个永不关闭的网络服务器。最好的办法是将命令放入入口点,这样它在构建过程中实际上不会运行,但会在映像启动时运行。
这就是我所说的话:
Step 8/8 : RUN python src/main.py
---> Running in e86c8adf46f0
* Running on http://0.0.0.0:80/ (Press CTRL+C to quit)
VS这个网络版本。
Step 10/10 : ENTRYPOINT npm start
---> Using cache
---> 9c5ec6770c47
Successfully built 9c5ec6770c47
Successfully tagged testcomposemachine_web:latest
Recreating testcomposemachine_web_1
Starting testcomposemachine_db_1
Attaching to testcomposemachine_db_1, testcomposemachine_web_1
如果命令永远不会完成,则构建将永远不会完成。所以是的,在某种程度上,Flask API阻止你的docker-compose命令构建所有其他文件。