我有一个docker swarm配置为使用Traefik作为反向代理。我的集群中的一个容器正在运行Nginx服务器,但是导航到该特定端点时出现502 Bad Gateway
错误。 Traefik的设置如下:
version: '3.5'
services:
traefik:
image: traefik:alpine
command: |-
--entryPoints="Name:http Address::80 Redirect.EntryPoint:https"
--entryPoints="Name:https Address::443 TLS"
--defaultentrypoints="http,https"
--accesslogsfile="/var/log/access.log"
--acme
--acme.acmelogging="true"
--acme.domains="${SERVER},${SANS1}"
--acme.email="${ACME_EMAIL}"
--acme.entrypoint="https"
--acme.httpchallenge
--acme.httpchallenge.entrypoint="http"
--acme.storage="/opt/traefik/acme.json"
--acme.onhostrule="true"
--docker
--docker.swarmmode
--docker.domain="${SERVER}"
--docker.network="frontend"
--docker.watch
--api
networks:
- frontend
ports:
- target: 80
published: 80
mode: host
- target: 443
published: 443
mode: host
- target: 8080
published: 8080
mode: host
volumes:
- traefik_acme:/opt/traefik
- traefik_logs:/var/log/access.log
- /var/run/docker.sock:/var/run/docker.sock:ro
deploy:
replicas: 1
placement:
constraints: [node.role == manager]
networks:
frontend:
name: "frontend"
driver: overlay
volumes:
traefik_acme:
traefik_logs:
此撰写文件提供了overlay
网络和Traefik服务。我的其他团队在以下撰写文件中定义:
version: "3.5"
services:
test:
image: emilevauge/whoami
deploy:
labels:
traefik.enable: "true"
traefik.frontend.rule: "Host:${SERVER};PathPrefixStrip:/test"
traefik.port: 80
networks:
- frontend
octeditor:
image: ${DOCKER_OCTEDITOR_IMAGE_TAG}
deploy:
replicas: 1
labels:
traefik.enable: "true"
traefik.frontend.rule: "Host:${SERVER}"
traefik.port: 3000
networks:
- frontend
ports:
- "3000:80"
octserver:
image: ${DOCKER_OCTSERVER_IMAGE_TAG}
deploy:
replicas: 1
labels:
traefik.enable: "true"
traefik.frontend.rule: "Host:${SERVER};PathPrefixStrip:/api"
traefik.port: 4000
networks:
- frontend
ports:
- "4000:4000"
visualizer:
image: dockersamples/visualizer:stable
deploy:
placement:
constraints:
- 'node.role == manager'
labels:
traefik.enable: "true"
traefik.frontend.rule: "Host:${SERVER};PathPrefixStrip:/visualizer"
traefik.port: 8001
networks:
- frontend
ports:
- "8001:8080"
stop_grace_period: 1m30s
volumes:
- "/var/run/docker.sock:/var/run/docker.sock:ro"
networks:
frontend:
external: true
相关配置适用于octeditor
服务:
octeditor:
image: ${DOCKER_OCTEDITOR_IMAGE_TAG}
deploy:
replicas: 1
labels:
traefik.enable: "true"
traefik.frontend.rule: "Host:${SERVER}"
traefik.port: 3000
networks:
- frontend
ports:
- "3000:80"
我正在将端口80(默认为Nginx监听)映射到端口3000,其中Traefik
被配置为定位此服务。这是运行Nginx的服务的Dockerfile
:
FROM node:latest as builder
WORKDIR /usr/src/app
COPY package.json .
RUN npm install
COPY . .
RUN npm run build
FROM nginx
COPY --from=builder /usr/src/app/build /usr/share/nginx/html
我只是构建一个react app
并将构建文件夹复制到/usr/share/nginx/html
文件夹。我尝试将Dockerfile作为一个独立的容器构建和运行,并且它可以正常工作,并且我已经检查了html
文件夹的内容,并且看起来一切正确。除visualizer
服务外,其他服务均正常运行。仅此octedtior
服务和visualizer
服务给了我502
错误。谁能提出解决方案,甚至如何检查发送到Nginx容器的流量?我已经尝试过docker ps servicename
,但是看不到来自该服务的任何错误。
编辑:
如果我将octeditor
的配置更改为此:
octeditor:
image: ${DOCKER_OCTEDITOR_IMAGE_TAG}
deploy:
replicas: 1
labels:
traefik.enable: "true"
traefik.frontend.rule: "Host:${SERVER}"
traefik.port: 80
networks:
- frontend
ports:
- "80:80"
并删除以前在端口test
上监听的80
服务,它似乎可以正常工作。我不知道以前的配置有什么问题吗?我以前以为是将流量从端口3000映射到容器的端口80,而现在是从端口80映射到80,但是从容器的角度来看应该没有什么改变了,对吧?
答案 0 :(得分:1)
相关配置适用于octeditor服务:
octeditor: image: ${DOCKER_OCTEDITOR_IMAGE_TAG} deploy: replicas: 1 labels: traefik.enable: "true" traefik.frontend.rule: "Host:${SERVER}" traefik.port: 3000 networks: - frontend ports: - "3000:80"
我正在将端口80(Nginx默认监听)映射到端口3000 Traefik配置为可找到此服务的位置。
traefik端口需要为80,而不是3000。端口映射将创建从3000上的主机到80上的容器的转发。但是traefik通过共享网络(frontend
直接与容器对话并且您需要为其提供容器端口。
除非您需要在没有代理的情况下直接访问它们,否则无需为通过traefik或任何其他反向代理访问的服务发布主机端口(这使您在这些情况下是否需要反向代理存在疑问)。换句话说,这可以在没有端口的情况下编写:
octeditor:
image: ${DOCKER_OCTEDITOR_IMAGE_TAG}
deploy:
replicas: 1
labels:
traefik.enable: "true"
traefik.frontend.rule: "Host:${SERVER}"
traefik.port: 80
networks:
- frontend