I have a FastAPI API that I want to serve using gunicorn, nginx and docker compose.
I manage to make the FastApi and Gunicorn work with docker compose, now I add nginx. But I cannot manage to make it work. When I do curl http://localhost:80 I get this messsage: If you see this page, the nginx web server is successfully installed and working. Further configuration is required.
So this is my docker compose file:
version: '3.8'
services:
web:
build:
dockerfile: Dockerfile.prod
context: .
command: gunicorn main:app --bind 0.0.0.0:8000 --worker-class uvicorn.workers.UvicornWorker
expose:
- 8000
env_file:
- ./.env.prod
nginx:
build:
dockerfile: Dockerfile.prod
context: ./nginx
ports:
- 1337:80
depends_on:
- web
On this one, if I set ports to 80:80 I get an error when the image is composed: Error starting userland proxy: listen tcp4 0.0.0.0:80: bind: address already in use, which I don't know why.
If I put [some random number]:80 (e.g. 1337:80) then the docker build works, but I get the If you see this page, the nginx web server is successfully installed but... error message state before. I think 1337 is not where nginx is listening, and that's why.
This is my nginx conf file:
upstream platic_service {
server web:8000;
}
server {
listen 80;
location / {
proxy_pass http://platic_service;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $host;
proxy_redirect off;
}
I tried to change it to listen to 8080 but does not work.
What am I doing wrong?
Related
My docker-compose.override.yml is as follows:
version: '3.4'
services:
helen.api:
environment:
- ASPNETCORE_ENVIRONMENT=Development
- ASPNETCORE_URLS=http://+:5000
ports:
- "5001:443"
- "5000:80"
volumes:
- ~/.aspnet/https:/root/.aspnet/https:ro
- ~/.microsoft/usersecrets:/root/.microsoft/usersecrets:ro
Dockerfile:
#See https://aka.ms/containerfastmode to understand how Visual Studio uses this Dockerfile to build your images for faster debugging.
FROM mcr.microsoft.com/dotnet/aspnet:6.0 AS base
WORKDIR /app
EXPOSE 80
EXPOSE 443
FROM mcr.microsoft.com/dotnet/sdk:6.0 AS build
WORKDIR /src
COPY ["MyProjectWebAPI/MyProject.API.csproj", "MyProjectWebAPI/"]
COPY ["MyProject.Globals/MyProject.Globals.csproj", "MyProject.Globals/"]
RUN dotnet restore "MyProjectWebAPI/MyProject.API.csproj"
COPY . .
WORKDIR "/src/MyProjectWebAPI"
RUN dotnet build "MyProject.API.csproj" -c Release -o /app/build
FROM build AS publish
RUN dotnet publish "MyProject.API.csproj" -c Release -o /app/publish
FROM base AS final
WORKDIR /app
COPY --from=publish /app/publish .
ENTRYPOINT ["dotnet", "MyProject.API.dll"]
Docker-compose.yml
version: "3.4"
services:
helen.api:
image: ${DOCKER_REGISTRY-}helenapi
build:
context: .
dockerfile: HelenWebAPI/Dockerfile
When trying to access any URL of the Dockerized ASP.NET Web API, I get a 502 Bad Gateway Error:
Perhaps the problem could be motivated that, according to the AWS documentation:
If you manage your Docker environment with Docker Compose, Elastic
Beanstalk assumes that you run a proxy server as a container. Therefore it
defaults to None for the Proxy server setting, and Elastic Beanstalk
does not provide an NGINX configuration.
Note
Even if you select NGINX as a proxy server, this setting is ignored in
an environment with Docker Compose. The Proxy server setting still
defaults to None.
Please, following the suggested advice, try providing your own nginx container and the corresponding configuration in one of your docker-compose files. For example:
version: '3.4'
services:
helen.api:
environment:
- ASPNETCORE_ENVIRONMENT=Development
- ASPNETCORE_URLS=http://+:5000
volumes:
- ~/.aspnet/https:/root/.aspnet/https:ro
- ~/.microsoft/usersecrets:/root/.microsoft/usersecrets:ro
nginx:
image: nginx:alpine
volumes:
- ~/nginx.conf:/etc/nginx/nginx.conf:ro
depends_on:
- helen.api
ports:
- "80:80"
Microsoft as well as AWS provide excellent guides about how your nginx.conf file could look like:
server {
listen 80;
location / {
proxy_pass http://helen.api:5000;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection keep-alive;
proxy_set_header Host $host;
proxy_cache_bypass $http_upgrade;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;
}
}
Note we are referencing the container helen.api as the server which is being proxied and that we are using port 5000 as configured in the ASPNETCORE_URLS setting.
Elastic Beanstalk's proxy per defaults forwards traffic on port 5000. So either you should configure nginx to forward request to the port, your app listens on - 80, or you should make your app listen on port 5000.
your current config:
ingress traffic ---> 80: nginx :any ---5000 --> ??? 80: your container
should be:
ingress traffic ---> 80: nginx :any ----80 ---> 80: your container
or maybe easier to configure:
ingress traffic ---> 80: ngnix :any ---5000 ---> 5000: your container
The latter can be easier changed by simply changing the environment property of your container.
I'm zero in .NET-terms, but look here:
https://docs.aws.amazon.com/elasticbeanstalk/latest/dg/dotnet-linux-platform-nginx.html
Currently I want to setup one server that has a Docker WordPress and Nginx that serves as a proxy in front. I would like in future to be able have multiple WordPress, NodeJS, ROR, etc, sitting behind this Nginx proxy.
When ever I try to connect to my server on port 80 I get a 403 forbidden.
I am able to build a Docker WordPress image and can connect to it on port 8080 on a remote PC.
Here is the compose.yml for my Docker WordPress:
version: "3.1"
services:
my_wordpress:
image: wordpress
ports:
- 8080:80
environment:
WORDPRESS_DB_PASSWORD: password
WORDPRESS_DB_HOST: my_mysql_wordpress
my_mysql_wordpress:
image: mysql:5.7
environment:
MYSQL_ROOT_PASSWORD: password
This is the part when I try to build a Nginx container I am getting a 403 forbidden.
Nginx DockerFile:
FROM nginx
COPY nginx.conf /etc/nginx/nginx.conf
Nginx compose.yml:
version: "2"
services:
web:
restart: always
image: nginx
ports:
- "80:80"
volumes:
- /path/in/vm/www:/usr/share/nginx/html
external_links:
- mywordpress_wordpress_1:mywordpress
networks:
default:
external:
name: mywordpress_default
Nginx nginx.conf:
http {
#...
upstream wordpress {
server mywordpress:8080;
}
#...
server {
listen 80;
server_name 192.168.1.124 test.me;
location / {
proxy_pass http://wordpress/;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection 'upgrade';
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_cache_bypass $http_upgrade;
}
}
}
Now for me it would seem that this most likely has to do with my nginx.conf as I am still able to connect to my WordPress site on port 8080. As well as I stated I am also able to connect to my Nginx proxy and I don't see any errors when it launches.
Is what I'm trying to doing even possible or do I need to have the Nginx application sitting on the OS and not inside a docker container?
You are putting Nginx and Wordpress in 2 different compose files. If you are running then on same machines then
external_links:
- mywordpress_wordpress_1:mywordpress
Above would not work if you are on different machines. Also make sure the external link you are using the correct name by checking docker ps.
Also check the logs of your nginx container to see if it is showing in any error. Because the error log will give a pointer as to why a 403 is being thrown, and it could be that the proxy_pass is not able to connect to your wordpress server because of the way you have configured it.
If you are running these compose files on different machines then instead of external_links use extra_hosts
extra_hosts:
- "mywordpress:<IP of the wordpress machine>"
If I am right, You want to run multiple wordpress docker images and use nginx to reverse proxy to the wordpress instances. In that Use-case, The nginx should sit on your OS and not inside a docker image. That way, the nginx will have the ability to proxy to ports on your OS which are tied to the wordpress containers.
Short description:
Nginx running on docker, how to configure nginx so that it forwards calls to host.
Long description:
We have one web application which communicates to couple of backends (lets says rest1, rest2 and rest3). We are responsible for rest1.
Lets consider that I started rest1 manually on my pc and running on 2345 port. I want nginx (which is running in docker) to redirect all call torest1 to my own running instance(note, the instance is running on host, not any container and not in docker). And for rest2 and rest3 to some other docker node or may be some other server (who cares).
What I am looking for is:
docker-compose.yml configurations (if needed).
nginx configuration.
Thanks in advance.
Configure nginx like the following (make sure you replace IP of Docker Host) and save it as default.conf:
server {
listen 80;
server_name _;
location / {
proxy_pass http://<IP of Docker Host>;
index index.html index.htm;
}
error_page 500 502 503 504 /50x.html;
location = /50x.html {
root /usr/share/nginx/html;
}
}
Now bring up the container:
docker run -d --name nginx -p 80:80 -v /path/to/nginx/config/default.conf:/etc/nginx/conf.d/default.conf nginx
If you are using Docker Compose file version 3 you don't need any special config for docker-compose.yml file at all, just use the special DNS name host.docker.internal to reach a host service, as on the following nginx.conf example:
events {
worker_connections 1024;
}
http {
upstream host_service {
server host.docker.internal:2345;
}
server {
listen 80;
access_log /var/log/nginx/http_access.log combined;
error_log /var/log/nginx/http_error.log;
location / {
proxy_pass http://host_service;
proxy_set_header Host $http_host;
proxy_set_header X-Real-IP $realip_remote_addr;
proxy_set_header X-Forwarded-Proto $scheme;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_http_version 1.1;
proxy_set_header Connection "";
}
}
}
Solution 1
Use network_mode: host, this will bind your nginx instance to host's network interface.
This could result in conflicts when running multiple nginx containers: every exposed port is binded to host's interface.
Solution 2
I'm running more nginx instances for every service I would like expose to outside world.
To keep the nginx configurations simple and avoid binding every nginx to host use the container structure:
dockerhost - a dummy container with network_mode: host
proxy - nginx container used as a proxy to host service,
link dockerhost to proxy, this will add an /etc/hosts entry in proxy contianer - we can use 'dockerhost' as a hostname in nginx configuration.
docker-compose.yaml
version: '3'
services:
dockerhost:
image: alpine
entrypoint: /bin/sh -c "tail -f /dev/null"
network_mode: host
proxy:
image: nginx:alpine
links:
- dockerhost:dockerhost
ports:
- "18080:80"
volumes:
- /share/Container/nginx/default.conf:/etc/nginx/conf.d/default.conf:ro
default.conf
location / {
proxy_pass http://dockerhost:8080;
This method allows us to have have automated let's encrtypt certificates generated for every service running on my server. If interested I can post a gist about the solution.
server {
listen 80;
server_name localhost;
location / {
proxy_pass http://host.docker.internal:3000;
}
}
Docker expose host address is host.docker.internal in Mac os
There a couple of things you have to keep in mind:
Docker compose (from version 3) by default uses the service name as hostname for inter container networking
Nginx need to know the upstream first
I strongly recommend mounting the default.conf directly into your docker-compose.yml.
Lastly you have to dockerize your backend to make use of docker internal networking.
An example repo where I use nginx and docker-compose in a full-stack project: https://gitlab.com/datails/api.
The following example have some prerequisites:
you have a folder structure like:
- backend/
- frontend/
- default.conf
- docker-compose.yml
Secondly the backend and front-end dit have a Dockerfile that exposes an application on port 3000.
Example default.conf:
upstream backend {
server backend:3000;
}
upstream frontend {
server frontend:3000;
}
server {
listen 80;
location /api {
proxy_pass http://backend;
}
location / {
proxy_pass http://frontend/;
}
}
Example docker-compose.yml:
version: '3.8'
services:
nginx:
image: nginx:1.19.4
depends_on:
- server
- frontend
volumes:
- ./nginx.conf:/etc/nginx/conf.d/default.conf
ports:
- '8080:80'
Then make sure you have your backend dockerized and called (in this case) backend as a service and a front-end (if needed) called frontend as a service in your docker-compose:
version: '3.8'
services:
nginx:
image: nginx:1.19.4
depends_on:
- server
- frontend
volumes:
- ./default.conf:/etc/nginx/conf.d/default.conf
ports:
- '8080:80'
frontend:
build: ./frontend
backend:
build: ./backend
This is a bare minimum example to get started. Hope this will help future developers.
What I want to achive is load balancing using this stack: Docker, Docker Compose, Registrator, Consul, Consul Template, NGINX and, finally, a tiny service that prints out "Hello world" in browser. So, at this moment I have a docker-compose.yml file. It looks like so:
version: '2'
services:
accent:
build:
context: ./accent
image: accent
container_name: accent
restart: always
ports:
- 80
consul:
image: gliderlabs/consul-server:latest
container_name: consul
hostname: ${MYHOST}
restart: always
ports:
- 8300:8300
- 8400:8400
- 8500:8500
- 8600:53/udp
command: -advertise ${MYHOST} -data-dir /tmp/consul -bootstrap -client 0.0.0.0
registrator:
image: gliderlabs/registrator:latest
container_name: registrator
hostname: ${MYHOST}
network_mode: host
restart: always
volumes:
- /var/run/docker.sock:/tmp/docker.sock
command: -ip ${MYHOST} consul://${MYHOST}:8500
nginx:
container_name: nginx
image: nginx:latest
restart: always
volumes:
- /etc/nginx
ports:
- 8181:80
consul-template:
container_name: consul-template
build:
context: ./consul-template
network_mode: host
restart: always
volumes_from:
- nginx
volumes:
- /var/run/docker.sock:/tmp/docker.sock
command: -consul=${MYHOST}:8500 -wait=5s -template="/etc/ctmpl/nginx.ctmpl:/etc/nginx/nginx.conf:docker kill -s HUP nginx"
The first service - accent - is that my web service that I need to load balance. When I run this command:
$ docker-compose up
I see that all services start to run and I see no error messages. It looks as if everything is just perfect. When I run
$ docker ps
I see this in the console:
... NAMES STATUS PORTS
consul-template Up 45 seconds
consul Up 56 seconds 0.0.0.0:8300->8300/tcp, 0.0.0.0:8400->8400/tcp, 8301-8302/tcp, 8301-8302/udp, 0.0.0.0:8500->8500/tcp, 8600/tcp, 8600/udp, 0.0.0.0:8600->53/udp
nginx Up 41 seconds 0.0.0.0:8181->80/tcp
registrator Up 56 seconds
accent Up 56 seconds 0.0.0.0:32792->80/tcp
Please, pay attention to the last row and especially to PORTS column. As you can see, this service publishes 32792 port. To check that my web service is achievable I go to 127.0.0.1:32972 on my host machine (the machine where I run docker compose up) and see this in browser:
Hello World
This is exactly what I wanted to see. However, it is not what I finally want. Please, have a look at the output of docker ps command and you will see, that my nginx service published 8181 port. So, my expectation is that when I go to this address - 127.0.0.1:8181 - I will see exactly the same "Hello world" page. However, it is not. In browser I see Bad Gateway error message and in nginx logs I see this error message
nginx | 2017/01/18 06:16:45 [error] 5#5: *5 connect() failed (111: Connection refused) while connecting to upstream, client: 172.18.0.1, server: , request: "GET /favicon.ico HTTP/1.1", upstream: "http://127.0.0.1:32792/index.php", host: "127.0.0.1:8181"
It is really interesting, because nginx does what I expect it to do - upstreams to "http://127.0.0.1:32792/index.php". But I'm not sure why does it fail. By the way, this is how nginx.conf (created automatically with Consul Template) looks like:
worker_processes 1;
events {
worker_connections 1024;
}
http {
sendfile on;
upstream app_servers {
server 127.0.0.1:32792;
}
server {
listen 80;
root /code;
index index.php index.html;
location / {
try_files $uri/ $uri/ /index.php;
}
location ~ \.php$ {
proxy_pass http://app_servers;
proxy_redirect off;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Host $server_name;
}
location ~ /\.ht {
deny all;
}
}
}
I wouldn't change anything, since this nginx.conf looks good to me. Trying to understand why it does not work, I shelled to nginx container and made a couple of commands:
$ curl accent
Hello World
$ curl 127.0.0.1:32972
curl: (7) Failed to connect to 127.0.0.1 port 32972: Connection refused
$ curl accent:32972
curl: (7) Failed to connect to accent port 32972: Connection refused
Again, it is interesting, because nginx container sees my web service under port 80 and not under its published 32972 port. Anyway, at this stage I do not know why it does not work and how to fix it. I just have a guess, that it is somehow connected to the way, how network is configured in docker-compose.yml. I tried various combinations of network_mode: host on accent and nginx service, but to no avail - either accent stops working or nginx or both. So, I need some help.
When you do port binding it publish some port from container (80 in accent e.g.) and some port on your host (random 32792 on host e.g.).Containers in same network as your accent container can access your container port 80 by accent (same as accent:80) due to docker-compose services name resolving. You can access accent:80 from your host with accent:32792. When you are requesting 127.0.0.1:32792 from your nginx container you can access only nginx container 32792 port, not accent. accent:32792 is not correct url from anyway (80 port open on accent, 32792 on host). But 127.0.0.1:32792 should work when you add nginx container to host network. But I noticed that you use incorrect port in curl call. Your accent:80 published to host 32792 but you request 32972.
I am trying to reverse-proxy an ejabberd connection manager with nginx in docker.
Following is my docker-compose file
version: '2'
services:
nginx:
image: nginx
ports:
- "80:80"
- "443:443"
depends_on:
- ejabberd
links:
- ejabberd
ejabberd:
image: ejabberd:16.04
depends_on:
- mysql
ports:
- "5280:5280"
links:
- mysql
mysql:
image: mysql:5.6
ports:
- "3306:3306"
The images nginx, ejabberd:16.04 and mysql:5.6 are available in my local docker.
Following is my server config file which is included in the nginx.conf file
upstream ejabberd-server {
server ejabberd:5280;
}
server {
# regular silverstripe things here
# location should match your JabberPage::BOSHUrl
# with a leading slash
listen 80;
#server_name oops.hereim.co
location /http-bind {
# Local ejabberd with http-bind
proxy_set_header X-Forwarded-Host $host;
proxy_set_header X-Forwarded-Server $host;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_pass http://ejabberd-server;
}
}
But when I try to access the url http://192.168.99.102/http-bind
I get the error 404 not found.
Am I missing something in the configuration above?
192.168.99.102 is the IP of my docker machine.
docker-compose exec nginx ping ejabberd
The above command returns a reply.
The upstream has to be setup to host ejabberd as nginx and ejabberd are not on the same ejabberd container.
If you see the docker-compose.yml, the ejabberd and mysql connection works fine and I am able to connect to mysql from ejabberd. But there seems to be some missing piece while connection nginx to ejabberd.
The issue is probably due to an nginx issue. nginx does not pick up .conf files under the /etc/nginx/conf.d directory.
I had to change the file /etc/nginx/sites-enabled/default and enter the location inside that file. This solved my problem for this question.
The next action item is to check why nginx does not read conf file from /etc/nginx/conf.d directory
Looks like your server part in upstream is a bit wrong.
Can you try server 127.0.0.1:5280; instead of server ejabberd:5280; ?