简介
Traefik是一个反向代理和负载均衡器，主要用于云原生场景，可自动识别Kubernetes、Docker、Docker Swarm等等技术下部署的服务，通过label标签自动生成反向代理路由规则。Traefik Github仓库 star是42.6k，官方文档地址：doc.traefik.io/traefik/
Nginx Proxy Manager 基于Nginx提供了一个管理后台，用户可以很轻松的对Nginx进行可视化的配置，内置了ssl 证书的自动化生成和管理。NPM Github仓库star是12.9k，官方文档地址：nginxproxymanager.com/
初体验环境说明
初次使用主要体验Traefik和NPM的基本功能，所以使用docker compose 方式快速搭建环境。
自定义网络
从 Docker 1.10 版本开始，docker daemon 实现了一个内嵌的 DNS server，使容器可以直接通过容器名称通信，但是需要使用自定义的网络。 所以这里我们先创建自定义网络： custom_net
docker create network custom_network #默认是bridge桥接网络
当然，也可以直接在docker compose yaml中定义，让它自行生成
# 创建自定义网络
networks:
custom_net:
driver: bridge
name: custom_net
# 引入已创建好的网络
#networks:
# custom_net:
# external: true
Traefik 使用
Traefik的配置分为静态配置和动态配置
- 静态配置一般使用命令行参数，一次配置后基本不用修改
- 动态配置用于配置路由规则、中间件（处理/转换请求）、负载均衡等，支持Docker、File、Ingress、Consul、Etcd、ZooKeeper、Redis、Http等多种方式
docker compose 配置如下：
version: "3"
services:
traefik:
image: traefik:2.9
command:
- "--log.level=DEBUG"
- "--api.insecure=true"
- "--api.dashboard=true"
- "--providers.docker=true"
- "--providers.file.directory=/traefik/conf"
- "--providers.file.watch=true"
- "--providers.docker.exposedByDefault=false"
ports:
# The HTTP port
- "80:80"
# The Web UI (enabled by --api)
- "81:8080"
environment:
TZ: Asia/Shanghai
volumes:
# So that Traefik can listen to the Docker events
- "/var/run/docker.sock:/var/run/docker.sock:ro"
- "/root/docker/traefik/conf:/traefik/conf"
networks:
- custom_net
# 引入已创建好的网络
networks:
custom_net:
external: true
配置说明
- api.dashboard=true 开启dashboard管理台，方便查看生效的配置
- providers.docker=true 开启docker容器label自动感知
- providers.docker.exposedByDefault=false 关闭无label的感知
- providers.file.watch=true 开启File文件模式的动态配置感知
- providers.file.directory 配置动态配置的文件路径
以上配置主要是方便接下来以Docker和File两种方式来演示Traefik自动创建路由转发规则
Dashboard展示
配置好后yaml后，使用docker compose up -d启动，访问http://localhost:81/dashboard 查看Dashboard面板
- Providers中Docker、File说明开启了这2种动态配置
- Entrypoints的80和8080是Traefik的流量入口
- HTTP、TCP、UDP三种路由规则的可视化
- Features是Traefik自身的功能：链路追踪、监控指标、访问日志、Hub扩展能力
Docker label自动感知
以官方的whoami镜像测试
version: '3'
services:
whoami:
# A container that exposes an API to show its IP address
image: traefik/whoami
labels:
- "traefik.enable=true"
- "traefik.http.routers.whoami.rule=PathPrefix(`/test`)"
networks:
- custom_net
# 引入已创建好的网络
networks:
custom_net:
external: true
只需要配置lables ，容器启动后，Traefik即可自动感知并添加路由转发规则 /test -> whoami 容器
PathPrefix匹配以xxx开头的请求，更多匹配规则可查询Traefik官方-Routers配置
从dashboard中可以看到流量路由的流转情况：
从Traefik的80端口为入口，经过/test为前缀匹配的HTTP Router，到达whoami容器服务Service暴露的80端口
因为Traefik和whoami同一网络下(custom_net)，所以whoami不需要对外暴露业务端口，Traefik会自动转到whoami的容器内端口。
上面的yaml配置中并没有暴露whoami的端口
Traefik也可以自动识别多个实例，自动完成负载均衡。
使用docker compose up -d --scale whoami=3 扩容到3个whoami容器，然后多次访问http://127.0.0.1/test，从返回的信息里面可以看到会轮询调用whoami容器
如果是直接使用docker run启动容器，可以这样加label
docker run -d --label 'traefik.http.routers.whoami.rule=PathPrefix(`/test`)' \
--label traefik.enable=true \
--network mynet \
--name whoami-whoami traefik/whoami
docker compose中启动的容器名为工程名称-服务条目名称-序号，这里--name whoami-whoami 是为了让docker run启动的容器自动归类到上面docker compose启动的services中
File配置文件动态感知
前面介绍了Docker label的方式自动添加路由规则到Traefik，现在也介绍一下File文件的方式。
Traefik会自动watch静态配置providers.file.directory=/traefik/conf路径，可以将其挂载出来/root/docker/traefik/conf:/traefik/conf，然后在conf下新增yaml文件即可
swagger.yaml
http:
routers:
s-user:
service: s-user
middlewares:
- "replaceRegex1"
rule: PathPrefix(`/s-user`)
s-order:
service: s-order
middlewares:
- "replaceRegex2"
rule: PathPrefix(`/s-order`)
s-product:
service: s-product
middlewares:
- "replaceRegex3"
rule: PathPrefix(`/s-product`)
middlewares:
replaceRegex1:
replacePathRegex:
regex: "^/s-user/(.*)"
replacement: "/$1"
replaceRegex2:
replacePathRegex:
regex: "^/s-order/(.*)"
replacement: "/$1"
replaceRegex3:
replacePathRegex:
regex: "^/s-product/(.*)"
replacement: "/$1"
services:
s-user:
loadBalancer:
servers:
- url: http://swagger-user:8080
s-order:
loadBalancer:
servers:
- url: http://swagger-order:8080
s-product:
loadBalancer:
servers:
- url: http://swagger-product:8080
配置解释：
routers 配置url匹配规则，PathPrefix是前缀匹配
middlewares 配置中间件，处理url路径；replacePathRegex是官方提供的用于正则转换，以replaceRegex1为例，将/s-user/ 这一段替换为 /
services 配置负载均衡，swagger-user为docker compose中配置的服务，利用Docker自带的DNS功能，通过服务名访问容器
上面配置的作用：即通过Traefik将80端口的请求url /s-user/xxx 替换为 /xxx ，转发到容器内部的swagger-user服务的8080端口
示例中的后端服务是3个swagger-ui镜像服务，启动后会读取xx.json内容形成swagger接口文档，此处不关注xx.json的具体内容，仅作用法参考
version: '3'
services:
swagger-user:
image: 'swaggerapi/swagger-ui'
ports:
- '8083:8080'
environment:
SWAGGER_JSON: /swagger/user.json
volumes:
- /mnt/d/docker/swagger-json:/swagger
networks:
- custom_net
swagger-order:
image: 'swaggerapi/swagger-ui'
ports:
- '8085:8080'
environment:
SWAGGER_JSON: /swagger/order.json
volumes:
- /mnt/d/docker/swagger-json:/swagger
networks:
- custom_net
swagger-product:
image: 'swaggerapi/swagger-ui'
ports:
- '8084:8080'
environment:
SWAGGER_JSON: /swagger/product.json
volumes:
- /mnt/d/docker/swagger-json:/swagger
networks:
- custom_net
networks:
custom_net:
external: true
其他动态配置如使用Etcd、Consul、ZooKeeper，配置格式与File类似。
File文件配置支持Traefik和业务服务都不重启的情况下动态生效路由配置，File watch底层是使用fsnotify，对于少数系统不支持动态感知，如windows wsl ubuntu
Nginx Proxy Manager 使用
NPM需要用到数据库来存储代理转发规则等数据，控制台支持禁用某个路由转发规则，其实就是通过数据库来暂存配置数据实现。 这里直接使用MySQL来初体验。docker-compose.yaml内容如下：
version: '3'
services:
nginx-proxy-manager:
image: 'jc21/nginx-proxy-manager:latest'
restart: always
ports:
# These ports are in format <host-port>:<container-port>
- '80:80' # Public HTTP Port
- '443:443' # Public HTTPS Port
- '81:81' # Admin Web Port
# Add any other Stream port you want to expose
# - '21:21' # FTP
environment:
# Mysql/Maria connection parameters:
DB_MYSQL_HOST: mysql
DB_MYSQL_PORT: 3306
DB_MYSQL_USER: "npm"
DB_MYSQL_PASSWORD: "npm"
DB_MYSQL_NAME: "npm"
# Uncomment this if IPv6 is not enabled on your host
# DISABLE_IPV6: 'true'
TZ: Asia/Shanghai
volumes:
- ./data:/data
- ./letsencrypt:/etc/letsencrypt
networks:
- custom_net
depends_on:
- mysql
mysql:
image: mysql:5.7.16
container_name: mysql
restart: always
ports:
- "3306:3306"
volumes:
- /mnt/d/docker/docker-compose/mysql/data:/var/lib/mysql
environment:
MYSQL_ROOT_PASSWORD: "123456"
TZ: Asia/Shanghai
#最大内存限制
deploy:
resources:
limits:
memory: 256M
networks:
- custom_net
privileged: true
command:
--server_id=100
--log-bin=mysql-bin
--binlog_format=mixed
--expire_logs_days=7
--default-authentication-plugin=mysql_native_password
--character-set-server=utf8mb4
--collation-server=utf8mb4_general_ci
--max_allowed_packet=16M
--sql_mode=STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION
--max_connections=10000
--slow_query_log=ON
--long_query_time=1
--log_queries_not_using_indexes=ON
--lower_case_table_names=1
--explicit_defaults_for_timestamp=true
# 引入已创建好的网络
networks:
custom_net:
external: true
使用docker compose up -d启动后，记得先进入MySQL创建用户、账号、密码、数据库，都是叫npm
可以通过NPM环境变量中的DB_MYSQL_USER、DB_MYSQL_NAME等配置自行指定 因为在同一容器网络下DB_MYSQL_HOST可以直接使用mysql访问
启动完成后，可以访问localhost:81 进入控制台，首次登录需要修改账号/密码。默认的账号/密码是admin@example.com/changeme
以whoami为例，配置路由规则接收来源是localhost、url是/test开头的请求
测试环境是windows wsl ubuntu环境，所以使用localhost，如果是云服务器，直接填写其公网ip即可
然后在Custom locations里面添加一个location
因为之前已经启动了多个whoami容器，所以此时可以直接访问http://localhost/test，多次访问也是轮询调用多个容器实例
配置静态资源
既然是基于Nginx实现，那么NPM肯定可以配置静态资源访问，这也是NPM和Traefik的一个区别，Traefik更多是做反向代理的用途。
上面已经把data目录挂载出来了，所以可以直接在data目录下新建test目录，新增123.txt、test.html文件
接下来在控制台配置静态资源访问，配置入口：Proxy Host -> Advanced -> Custom Nginx Configuration
location /files {
alias /data/html/;
autoindex on;
}
然后访问 http://localhost/files/
也可以直接访问 http://localhost/files/123.txt 查看文件内容
配置upstream负载均衡
upstream在Nginx中配置示例如下
upstream backend {
server backend1.example.com:8080;
server backend2.example.com:8080;
}
server {
location / {
proxy_pass http://backend;
}
}
直接在NPM控制台的location里面配置不了upstream，我们可以找到其提供的自定义配置入口。 通过查阅NPM官方文档-高级配置，可以知道自定义配置路径是 /data/nginx/custom 其中http块配置可以用下面2个，选其一即可
/data/nginx/custom/http_top.conf #包含在主 http 块的顶部
/data/nginx/custom/http.conf #包含在主 http 块的末尾
-
在挂载路径 data/nginx下新建custom目录，在下面新建http.conf文件
upstream whoami-upstream {
server 172.19.0.3:80;
server 172.19.0.4:80;
server 172.19.0.5:80;
}
这里直接配置whoami的容器ip，方便测试
-
在控制台Advanced配置里自定义 location
location /test-lb {
proxy_pass http://whoami-upstream;
}
然后访问 http://localhost/test-lb 测试，请求仍然会轮询调用whoami服务。
NPM实现原理
既然NPM是基于Nginx，那么只要找到Nginx的默认配置，即可知道它的实现原理。本质上是对Nginx配置的管理。 执行docker compose logs，从NPM的启动日志可以看到默认的配置路径：
nginx-proxy-manager-nginx-proxy-manager-1 | - /etc/nginx/conf.d/production.conf
nginx-proxy-manager-nginx-proxy-manager-1 | - /etc/nginx/conf.d/include/ssl-ciphers.conf
nginx-proxy-manager-nginx-proxy-manager-1 | - /etc/nginx/conf.d/include/proxy.conf
nginx-proxy-manager-nginx-proxy-manager-1 | - /etc/nginx/conf.d/include/force-ssl.conf
nginx-proxy-manager-nginx-proxy-manager-1 | - /etc/nginx/conf.d/include/block-exploits.conf
nginx-proxy-manager-nginx-proxy-manager-1 | - /etc/nginx/conf.d/include/assets.conf
nginx-proxy-manager-nginx-proxy-manager-1 | - /etc/nginx/conf.d/include/letsencrypt-acme-challenge.conf
nginx-proxy-manager-nginx-proxy-manager-1 | - /etc/nginx/conf.d/include/ip_ranges.conf
nginx-proxy-manager-nginx-proxy-manager-1 | - /etc/nginx/conf.d/include/resolvers.conf
nginx-proxy-manager-nginx-proxy-manager-1 | - /etc/nginx/conf.d/default.conf
执行docker compose exec nginx-proxy-manager bash 进入容器，查看对应的conf文件内容
default.conf默认监听80、443端口（处理转发请求），production.conf默认监听81端口（处理控制台请求）
nginx主配置文件
路径：/etc/nginx/nginx.conf 内容如下：
# run nginx in foreground
daemon off;
pid /run/nginx/nginx.pid;
user npmuser;
# Set number of worker processes automatically based on number of CPU cores.
worker_processes auto;
# Enables the use of JIT for regular expressions to speed-up their processing.
pcre_jit on;
error_log /data/logs/fallback_error.log warn;
# Includes files with directives to load dynamic modules.
include /etc/nginx/modules/*.conf;
events {
include /data/nginx/custom/events[.]conf;
}
http {
include /etc/nginx/mime.types;
default_type application/octet-stream;
sendfile on;
server_tokens off;
tcp_nopush on;
tcp_nodelay on;
client_body_temp_path /tmp/nginx/body 1 2;
keepalive_timeout 90s;
proxy_connect_timeout 90s;
proxy_send_timeout 90s;
proxy_read_timeout 90s;
ssl_prefer_server_ciphers on;
gzip on;
proxy_ignore_client_abort off;
client_max_body_size 2000m;
server_names_hash_bucket_size 1024;
proxy_http_version 1.1;
proxy_set_header X-Forwarded-Scheme $scheme;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Accept-Encoding "";
proxy_cache off;
proxy_cache_path /var/lib/nginx/cache/public levels=1:2 keys_zone=public-cache:30m max_size=192m;
proxy_cache_path /var/lib/nginx/cache/private levels=1:2 keys_zone=private-cache:5m max_size=1024m;
log_format proxy '[$time_local] $upstream_cache_status $upstream_status $status - $request_method $scheme $host "$request_uri" [Client $remote_addr] [Length $body_bytes_sent] [Gzip $gzip_ratio] [Sent-to $server] "$http_user_agent" "$http_referer"';
log_format standard '[$time_local] $status - $request_method $scheme $host "$request_uri" [Client $remote_addr] [Length $body_bytes_sent] [Gzip $gzip_ratio] "$http_user_agent" "$http_referer"';
access_log /data/logs/fallback_access.log proxy;
# Dynamically generated resolvers file
include /etc/nginx/conf.d/include/resolvers.conf;
# Default upstream scheme
map $host $forward_scheme {
default http;
}
# Real IP Determination
# Local subnets:
set_real_ip_from 10.0.0.0/8;
set_real_ip_from 172.16.0.0/12; # Includes Docker subnet
set_real_ip_from 192.168.0.0/16;
# NPM generated CDN ip ranges:
include conf.d/include/ip_ranges.conf;
# always put the following 2 lines after ip subnets:
real_ip_header X-Real-IP;
real_ip_recursive on;
# Custom
include /data/nginx/custom/http_top[.]conf;
# Files generated by NPM
include /etc/nginx/conf.d/*.conf;
include /data/nginx/default_host/*.conf;
include /data/nginx/proxy_host/*.conf;
include /data/nginx/redirection_host/*.conf;
include /data/nginx/dead_host/*.conf;
include /data/nginx/temp/*.conf;
# Custom
include /data/nginx/custom/http[.]conf;
}
stream {
# Files generated by NPM
include /data/nginx/stream/*.conf;
# Custom
include /data/nginx/custom/stream[.]conf;
}
# Custom
include /data/nginx/custom/root[.]conf;
从include顺序可以知道，它在http块中先是include /data/nginx/custom/http_top[.]conf
然后 include /data/nginx/proxy_host/*.conf，而控制台对应的配置就在这个data/nginx目录
最后include /data/nginx/custom/http[.]conf。这样也就对应了官方文档说明的：
/data/nginx/custom/http_top.conf #包含在主 http 块的顶部
/data/nginx/custom/http.conf #包含在主 http 块的末尾
自定义配置
以代理配置为例，查看data/nginx/proxy_host 目录下有一个 1.conf，其内容即对应我们的自定义配置
# ------------------------------------------------------------
# localhost
# ------------------------------------------------------------
server {
set $forward_scheme http;
set $server "127.0.0.1";
set $port 80;
listen 80;
listen [::]:80;
server_name localhost;
location /files {
alias /data/html/;
autoindex on;
}
location /test-lb {
proxy_pass http://whoami-upstream;
}
location /test {
proxy_set_header Host $host;
proxy_set_header X-Forwarded-Scheme $scheme;
proxy_set_header X-Forwarded-Proto $scheme;
proxy_set_header X-Forwarded-For $remote_addr;
proxy_set_header X-Real-IP $remote_addr;
proxy_pass http://whoami:80;
# Block Exploits
include conf.d/include/block-exploits.conf;
}
location / {
# Proxy!
include conf.d/include/proxy.conf;
}
# Custom
include /data/nginx/custom/server_proxy[.]conf;
}
可以看到，它实际是把Proxy Host 中 Custom locations 、Advanded配置合并了。
至此，Traefik和Nginx Proxy Manager的初体验就结束了~
转载：https://juejin.cn/post/7222577873792827451
