这次部署是在ubuntu上进行的,在部署开始之前要做以下事情：
1.在你的linux系统上安装python-pip
sudo apt-get install python-setuptools
sudo apt-get install python-dev
sudo apt-get install python-pip2.安装virtualenv
sudo apt-get install python-virtualenv3.切换到你的flask应用项目的根目录
virtualenv venv
source venv/bin/activate4.进入虚拟环境后，安装你的flask应用的所有扩展包,最好把所有的扩展包写入requirements.txt
pip install -r requirements.txt5.安装gunicorn和gevent
pip install gunicorn
pip install gevent6.启动gunicorn（注：这时必须进入你项目的根目录且处于虚拟环境中，因为gunicorn安装在虚拟环境中）
1.配置gunicorn启动配置文件,在项目的根目录创建一个gun.conf,写入以下内容:
import os
bind = '0.0.0.0:8000' #绑定的ip及端口号
workers = 4 #进程数
backlog = 2048 #监听队列
worker_class = "gevent" #使用gevent模式，还可以使用sync 模式，默认的是sync模式
debug = True
chdir = #你项目的根目录,比如我的app.py文件在/home/ubuntu/app目录下，就填写'/home/ubuntu/app'
proc_name = 'gunicorn.proc'2.然后执行以下代码启动
gunicorn -k gevent -c gun.conf app:app如果看到类似下面的反应就表示启动成功，如果失败请检查你所在的目录是否为Flask项目的根目录
(venv) ubuntu@VM-250-138-ubuntu:~/app$ gunicorn -k gevent -c gun.conf app:app
[2016-09-10 23:07:55 +0800] [2641] [DEBUG] Current configuration:
paste: None
post_fork: <function Postfork.post_fork at 0x7fda10539bf8>
threads: 1
chdir: /home/ubuntu/app
group: 500
post_request: <function PostRequest.post_request at 0x7fda10544598>
forwarded_allow_ips: ['127.0.0.1']
worker_exit: <function WorkerExit.worker_exit at 0x7fda10544730>
worker_tmp_dir: None
tmp_upload_dir: None
secure_scheme_headers: {'X-FORWARDED-SSL': 'on', 'X-FORWARDED-PROTO': 'https', 'X-FORWARDED-PROTOCOL': 'ssl'}
syslog_addr: udp://localhost:514
post_worker_init: <function PostWorkerInit.post_worker_init at 0x7fda10539d90>
pre_exec: <function PreExec.pre_exec at 0x7fda105442f0>
max_requests_jitter: 0
timeout: 30
keepalive: 2
umask: 0
logger_class: gunicorn.glogging.Logger
syslog_prefix: None
spew: False
pre_fork: <function Prefork.pre_fork at 0x7fda10539a60>
keyfile: None
ca_certs: None
do_handshake_on_connect: False
worker_connections: 1000
pre_request: <function PreRequest.pre_request at 0x7fda10544488>
workers: 4
ssl_version: 3
sendfile: None
reload: False
syslog: False
statsd_prefix:
limit_request_field_size: 8190
cert_reqs: 0
ciphers: TLSv1
syslog_facility: user
on_reload: <function OnReload.on_reload at 0x7fda10539730>
on_exit: <function OnExit.on_exit at 0x7fda10544a60>
proxy_protocol: False
suppress_ragged_eofs: True
check_config: False
proc_name: gunicorn.proc
capture_output: False
enable_stdio_inheritance: False
pidfile: /home/ubuntu/app/gunicorn.pid
worker_int: <function WorkerInt.worker_int at 0x7fda10539f28>
accesslog: None
loglevel: debug
logconfig: None
statsd_host: None
nworkers_changed: <function NumWorkersChanged.nworkers_changed at 0x7fda105448c8>
preload_app: False
default_proc_name: app:app
limit_request_line: 4094
errorlog: -
daemon: False
pythonpath: None
certfile: None
bind: ['127.0.0.1:8000']
when_ready: <function WhenReady.when_ready at 0x7fda105398c8>
worker_class: gevent
raw_env: []
graceful_timeout: 30
on_starting: <function OnStarting.on_starting at 0x7fda10539598>
max_requests: 0
backlog: 2048
proxy_allow_ips: ['127.0.0.1']
django_settings: None
config: gun.conf
user: 500
access_log_format: %(h)s %(l)s %(u)s %(t)s "%(r)s" %(s)s %(b)s "%(f)s" "%(a)s"
limit_request_fields: 100
worker_abort: <function WorkerAbort.worker_abort at 0x7fda10544158>
[2016-09-10 23:07:55 +0800] [2641] [INFO] Starting gunicorn 19.6.0
[2016-09-10 23:07:55 +0800] [2641] [DEBUG] Arbiter booted
[2016-09-10 23:07:55 +0800] [2641] [INFO] Listening at: http://127.0.0.1:8000 (2641)
[2016-09-10 23:07:55 +0800] [2641] [INFO] Using worker: gevent
[2016-09-10 23:07:55 +0800] [2644] [INFO] Booting worker with pid: 2644
[2016-09-10 23:07:55 +0800] [2646] [INFO] Booting worker with pid: 2646
[2016-09-10 23:07:55 +0800] [2647] [INFO] Booting worker with pid: 2647
[2016-09-10 23:07:55 +0800] [2648] [INFO] Booting worker with pid: 2648
[2016-09-10 23:07:55 +0800] [2641] [DEBUG] 4 workers命令的app:app中第一个为你定义Flask应用实例的py文件，这里不要加入后缀，例如:
#app.py
from flask import Flask
app = Flask(__name__)
@app.route("/")
def index():
return "你已经成功了。"
if __name__ == "__main__":
app.run()第二个app是你在该文件中实例化的Flask应用的变量名，然后打开你本地电脑的浏览器，访问http:\你的服务器ip:8000,
你就可以看到你的Flask应用。
7.另外启动一个终端，安装nginx并配置(之后的操作不需要再虚拟环境中进行)
sudo apt-get install nginx打开/etc/nginx/sites-enabled/，备份default文件后,在default加入以下内容:
server {
listen 80;
server_name 公网IP或者你已经解析的域名;
location / {
proxy_pass http://127.0.0.1:8000;
proxy_redirect off;
proxy_set_header Host $host:80;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
}
}然后输入以下命令检查nginx配置文件是否有错:
sudo nginx -t
#成功会出现类似的提示:
nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
nginx: configuration file /etc/nginx/nginx.conf test is successful
#出错请检查你的配置启动nginx
sudo service nginx start
sudo nginx -s reload可以通过以下命令查看nginx状态
service nginx status打开浏览器，访问http://你的服务器ip，就可以看到你的Flask应用界面。
项目目录结构
app/
|----app.py
|----manage.py
|----requirements.txt
|----data.sqlite
|----gun.conf
|----static
|----templates
|----venv这个教程只是初步用来快速部署，之后会深入研究下uwsgi和nginx部署.