I am trying to run a Node application in a Docker container. The installation instructions specified that after adding host: '0.0.0.0' to config/local.js and running docker-compose up the app should be accessible at localhost:3000, but I get an error message in the browser saying "The connection was reset - The connection to the server was reset while the page was loading."
I have tried to add the host: '0.0.0.0' in different places, or remove it entirely, access https://localhost:3000 as opposed to at http, connecting to localhost:3000/webpack-dev-server/index.html, etc.
What could be going wrong?
Related
I have created a PostgreSQL with a web server DOCKER CONTAINER and my app running with an API to manage all the endpoints.
The link of my git repo is: https://github.com/JulioValderrama/store-front-project.git
But I am facing problems with the connections with the Database, as depending on the Postgres HOST name value in my .env file one of the two servers (one local running in PORT 4000 and the web server running in the docker container in PORT 3000) will work or will fail.
I have tried the next:
Local server running in PORT 4000
Docker web server running in PORT 3000
HOST "127.0.0.1"
Going to¨:
http://localhost:3000/
Works fine and get response, now when trying to connect it to any of my database API:
http://localhost:3000/products
I get the error:
"Could not get PRODUCTS. Error: Error: connect ECONNREFUSED 127.0.0.1:5432"
Going to:
http://localhost:4000
Works fine and get response, now when trying to connect it to any of my database API:
http://localhost:4000/products
It works! I get the list of all my products!!
HOST "postgres"
I put "postgres" because I read online that you have to name HOST as the postgres docker image created, which is my case. And it works for the remote server.
Going to:
http://localhost:3000
Works fine and get response, then when trying to connect it to database API:
http://localhost:3000/products
It works!! It gives me the list of my products !!
Going to:
http://localhost:4000
Works fine and get response, then when trying to connect it to database API:
http://localhost:4000/products
It gives me the error:
"Could not get PRODUCTS. Error: Error: getaddrinfo ENOTFOUND postgres"
So it seems like there is an error when trying to connect to the database due to the server or the HOST name, I have no idea....
In docker-compose.yaml you have linked your machine 5432 to containers 5432 port.
If you are using docker container and want to reach postgres, use postgres as POSTGRES_HOST value.
If you are running application outside the docker environment use 0.0.0.0, 127.0.0.1.
Make sure you haven't installed postgres locally
brew uninstall postgres
I have a simple React Front-end that uses a proxy Node.js server to fetch data over http and ws.
This runs completely fine on my local host.
When I run this within a docker container, the http calls still work, but the ws connection cannot be established.
If I expose my proxy server port with:
ports:
- 2999:2999
Also the ws connection starts to work. I do not want to expose the proxy server though.
I thought about running this entire setup in another docker container, but that would be the last option for me.
I thought setting:
ports:
- "2999"
Would just make the internal port of the docker image available and solve my problem, but it does not.
How do I expose the port of the proxy to the react app, but not the outside network?
(both react app and proxy are in the same docker image)
I created my App from this boilerplate
https://github.com/Bikranshu/express-react-boilerplate
Now I uploaded it to a live Linux server and Node server is running.
Screenshot of running server
But I am unable to access it through Browser with IP address of server.
http://ip_address:3000
After waiting long in browser it is showing timeout error.
Please guide me how can I access the node/react app from browser.
Server running at <ipaddress> is a local IP, are you in a different network than the server? If so, you should be typing https://<public ipaddress>:3000
UPDATE
Hosting services usually only forward port 80 (http) or 443 (https.) This means that your port 3000 is not allowed for public access. To fix your problem you need to change the listening port.
Check line 42 on
server/app.js change 'port' to "80" or check package.json and edit npm start to set port to 80
I guess I will start at the start of my application.
I am making a full mean-stack application and I want it to run in docker. To use docker I am using a virtualbox with Ubuntu. When I run my docker-compose, everything is working on localhost:4200. Now I want to open my application on my host machine (Windows 7).
When I go to my application via (ip addres should be kept secret, right?) xxx.xxx.xx.xxx:4200/login the page looks fine, but I get these errors:
I am using Angular cli 1.4.1 with node 8.4.0
Why am I getting these errors and how do I fix them?
My docker-compose
Your server which is listening on port 4200 is listening on your xxx.xxx.xxx.xxx interface (not necessary to hide lan IP, but nevermind...).
Your angular application is running on your host system. the localhost is the localhost of your host system, not the guest. so you have two solutions:
changing your urls inside the angular application to point to xxx.xxx.xxx.xxx:4200 instead of localhost:4200.
Forwarding your 4200 port from your host to your guest system using virtual box :
shutdown guest.
select guest and click on settings
go to the network tab.
click on "advanced"
then select "ports redirections" and bind your host 127.0.0.1:4200 to your guest's 4200 port
I have 3 separate pieces to my dockerized application:
nodeapp: A node:latest docker container running an expressjs app that returns a JSON object when accessed from /api. This server is also CORs enabled according to this site.
nginxserver: A nginx:latest static server that simply hosts an index.html file that allows the user to click a button which would make the XMLHttpRequest to the node server above.
My host machine
The node:latest has its port exposed to the host via 3000:80.
The nginx:latest has its port exposed to the host via 8080:80.
From host I am able to access both nodeapp and nginxserver individually: I can make requests and see the JSON object returned from the node server using curl from the command line, and the button (index.html) is visible on the screen when I hit localhost:8080.
However, when I try clicking the button the call to XMLHttpRequest('GET', 'http://nodeapp/api', true) fails without seemingly hitting the nodeapp server (no log is present). I'm assuming this is because host does not understand http://nodeapp/api.
Is there a way to tell docker that while a container is running to add its container linking alias to my hosts file?
I don't know if my question is the proper solution to my problem. It looks as though I'm getting a CORs error returned but I don't think it is ever hitting my server. Does this have to do with accessing the application from my host machine?
Here is a link to an example repo
Edit: I've noticed that the when using the stack that clicking the button sends a response from my nginx container. I'm confused as to why it is routing through that server as the nodeapp is in my hosts file so it should recognize the correlation there?
Problem:
nodeapp exists in internal network, which is visible to your nginxserver only, you can check this by enter nginxserver
docker exec -it nginxserver bash
# cat /etc/hosts
Most important, your service setup is not correct, nginxserver shall act as reverse proxy in front of nodeapp
host (client) -> nginxserver -> nodeapp
Dirty Quick Solution:
If you really really want your client (host) to access internal application nodeapp, then you simple change below code
XMLHttpRequest('GET', 'http://nodeapp/api', true)
To
XMLHttpRequest('GET', 'http://localhost:3000/api', true)
Since in your docker-compose.yml, nodeapp service port 80 is exposed in home network as 3000, which can be accessed directly.
Better solution
You need redesign your service stack, to make nginxserver as frontend node, see one sample http://schempy.com/2015/08/25/docker_nginx_nodejs/