日常更新

Author: leafcoder

_posts/2018-03-28-Nginx-uwsgi-Flask项目部署.md

@@ -0,0 +1,163 @@
+---
+layout: post
+title: "Nginx、uWSGI、Flask 项目部署"
+description: ""
+category: articles
+tags: [Nginx, uWSGI, Flask 项目部署]
+image:
+  feature:
+  credit: Michael Rose
+  creditlink: http://mademistakes.com
+comments: true
+share: true
+---
+
+我使用 Flask 作为开发框架比较少，所以在部署 Flask 项目方面经验相对较少，现将部署流程记录一下，留作今后参考。
+
+# 1. 开发 Flask
+
+开发好的 Flask 项目包含一个运行文件 manage.py，其中包含一个 app 对象，例如项目结构：
+
+```
+├── project
+│   ├── __init__.py
+│   ├── main
+│   ├── models.py
+│   ├── static
+│   └── templates
+├── manage.py
+└── uwsgi.ini
+```
+
+# 2. 安装配置 Nginx
+
+## 下载 nginx 源码 nginx-1.12.1.tar.gz，解压后安装；
+
+```
+$ cd Downloads
+$ tar zxf nginx-1.12.1.tar.gz
+$ cd nginx-1.12.1
+$ ./configure --prefix=/opt/nginx
+$ make && make install
+```
+
+## 配置 Nginx修改配置文件，增加 server 配置；
+
+```
+$ cd /opt/nginx
+$ vi conf/nginx.conf
+```
+
+
+```
+#user  nobody;
+worker_processes  4;    #可以设置成cpu个数，体验较佳的性能
+
+#error_log  logs/error.log;
+#error_log  logs/error.log  notice;
+#error_log  logs/error.log  info;，
+
+#pid        logs/nginx.pid;
+
+worker_rlimit_nofile 65535; # 最大打开文件数，这个值需要<= worker_connections
+
+events {
+    worker_connections  65535;  # 最大连接数，这个值依赖系统的配置。
+}
+
+http {
+    include       mime.types;
+    default_type  application/octet-stream;
+
+    #log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
+    #                  '$status $body_bytes_sent "$http_referer" '
+    #                  '"$http_user_agent" "$http_x_forwarded_for"';
+
+    #access_log  logs/access.log  main;
+
+    sendfile        on;
+    tcp_nopush     on;
+
+    #keepalive_timeout  0;
+    keepalive_timeout  65;
+
+    gzip  on;
+
+    # 以下为您需要增加的配置
+
+    upstream my_servers {
+        server 192.168.0.100:8080;
+        server 192.168.0.101:8080;
+        server 192.168.0.102:8080;
+    }
+
+    # uWSGI dynamic
+    server {
+        listen       80;
+        server_name  dynamic.youdomain.cn;
+
+        location / {
+            include      uwsgi_params;
+            uwsgi_pass   http://my_servers;
+            uwsgi_ignore_client_abort on;
+            uwsgi_param UWSGI_PYHOME /home/ubuntu/.virtualenvs/pyenv;
+            uwsgi_param UWSGI_CHDIR  /home/ubuntu/my_project;
+            uwsgi_param UWSGI_SCRIPT manage;
+        }
+    }
+
+    # uWSGI static
+    server {
+        listen       80;
+        server_name  static.youdomain.cn;
+
+        location /static {
+            root html;
+        }
+    }
+
+}
+```
+
+## 启动 Nginx
+
+```
+$ cd /opt/nginx/sbin
+$ ./nginx
+```
+
+# 3. 安装配置uWSGI
+
+## 安装 uWSGI
+
+```
+$ pip install uwsgi
+```
+
+## 创建配置文件 uwsgi.ini
+
+```
+[uwsgi]
+socket = :8080
+wsgi-file = manage.py
+callable = app
+master = true          //主进程
+vhost = true           //多站模式
+no-site = true         //多站模式时不设置入口模块和文件
+workers = 24           //子进程数
+reload-mercy = 10
+vacuum = true          //退出、重启时清理文件
+max-requests = 65535
+limit-as = 512
+buffer-size = 30000
+chmod-socket = 666
+pidfile = ./logs/%n.pid
+daemonize = ./logs/%n.log
+```
+
+## 运行 uWSGI
+
+```
+$ cd /home/ubuntu/my_project
+$ uwsgi --ini uwsgi.ini
+```

_posts/2018-03-28-Nginx静态资源跨域设置.md

@@ -0,0 +1,32 @@
+---
+layout: post
+title: "Nginx静态资源跨域设置"
+description: ""
+category: articles
+tags: [Nginx, 跨域]
+image:
+  feature:
+  credit: Michael Rose
+  creditlink: http://mademistakes.com
+comments: true
+share: true
+---
+
+
+在nginx的配置文件 `conf/nginx.conf` 中增加头部信息，具体如下所示:
+
+```
+http {
+    ...
+
+    server {
+        listen       80;
+        server_name  static.mydomain.cn;
+
+        location /static {
+            root html;
+            add_header Access-Control-Allow-Origin *; # 你需要增加的 HTTP 头
+        }
+    }
+}
+```

_posts/2018-03-28-uWSGI-listen-queue-of-socket-full-队列溢出的问题.md

@@ -0,0 +1,33 @@
+---
+layout: post
+title: "uWSGI listen queue of socket full 队列溢出的问题"
+description: ""
+category: articles
+tags: [uWSGI, 队列溢出]
+image:
+  feature:
+  credit: Michael Rose
+  creditlink: http://mademistakes.com
+comments: true
+share: true
+---
+
+使用 uWSGI 时，uWSGI的日志中出现错误 `uWSGI listen queue of socket full` 的错误信息，想要解决这个问题，需要修改服务器的配置，具体如下：
+
+
+```
+$ vi /etc/sysctl.conf
+
+在文件最后添加一行记录：
+
+net.core.somaxconn = 1024
+```
+
+```
+重载配置，使配置立即生效：
+$ sysctl -p
+```
+
+在 uWSGI 的配置项中增加 --listen 1024，也可以将此配置项写入 uWSGI 的配置文件中；
+
+重启 uWSGI，如此可以在某种程度上缓解此问题。