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Python + FastAPI + OracleCloud: How to expose my python fastapi endpoint on Oracle Cloud to Internet – Nginx

I have a Python + FastAPI restful API project running the free tier of Oracle Cloud VM instance.

I use Gunicorn to serve the api and also installed Nginx just in case it’s needed.

I have tested my running project with

curl http://localhost:8000

and I can see my API response.

Now my question is : how can I expose this api endpoint outside on the Internet?

Update 1

I started my Python API project with this command:

gunicorn -w 4 -k uvicorn.workers.UvicornWorker main:app --timeout 1200 -b 0.0.0.0

I saw the messages below:

[2021-05-23 00:40:28 +0000] [3850] [INFO] Starting gunicorn 20.0.2
[2021-05-23 00:40:28 +0000] [3850] [INFO] Listening at: http://0.0.0.0:8000 (3850)
[2021-05-23 00:40:28 +0000] [3850] [INFO] Using worker: uvicorn.workers.UvicornWorker
[2021-05-23 00:40:28 +0000] [3853] [INFO] Booting worker with pid: 3853
[2021-05-23 00:40:28 +0000] [3854] [INFO] Booting worker with pid: 3854
[2021-05-23 00:40:28 +0000] [3857] [INFO] Booting worker with pid: 3857
[2021-05-23 00:40:28 +0000] [3858] [INFO] Booting worker with pid: 3858
[2021-05-23 00:42:04 +0000] [3853] [INFO] Started server process [3853]
[2021-05-23 00:42:04 +0000] [3857] [INFO] Started server process [3857]
[2021-05-23 00:42:04 +0000] [3857] [INFO] Waiting for application startup.
[2021-05-23 00:42:04 +0000] [3858] [INFO] Started server process [3858]
[2021-05-23 00:42:04 +0000] [3858] [INFO] Waiting for application startup.
[2021-05-23 00:42:04 +0000] [3858] [INFO] Application startup complete.
[2021-05-23 00:42:04 +0000] [3853] [INFO] Waiting for application startup.
[2021-05-23 00:42:04 +0000] [3853] [INFO] Application startup complete.
[2021-05-23 00:42:04 +0000] [3857] [INFO] Application startup complete.
[2021-05-23 00:42:04 +0000] [3854] [INFO] Started server process [3854]
[2021-05-23 00:42:04 +0000] [3854] [INFO] Waiting for application startup.
[2021-05-23 00:42:04 +0000] [3854] [INFO] Application startup complete.

Then I copied the IP address from the Compute >> Instances >> Instance Details panel and accessed it from my Chrome. Straightaway, it shows me

Unable to connect

Also read through several articles about using Nginx and tried without any luck.

Update 2

Using curl to access the website from my local machine

$ curl http://168.138.12.192:8000/
curl: (7) Failed to connect to 168.138.12.192 port 8000: No route to host

However, when access the IP directly using curl, I was able to get the default Nginx website.
$ curl http://168.138.12.192

Tags:

2

Answers


  1. Chosen as BEST ANSWER
    0

    Finally, I found out what I missed:

    sudo iptables -I INPUT -p tcp -s 0.0.0.0/0 --dport 8000 -j ACCEPT

    I have to run this command to open the port 8000(yes, my website is using port 8000).

    I thought I have added Ingress Rule to accept tcp 8000, but it turns out that I still need to run the aforementioned command.

    I do not quite understand why I need to do it, but it solves the problem.


  2. 0

    Did you changed the default html page under /var/www/html directory? If not try customize the html page as per your requirement and see if it works for you or else it would just show the default nginx page when accessed from browser using public IP.

    Adding to this, Also check if the port 8000 is allowed in the security list and OS firewall. The default port for http request is 80, you need to change the default port from 80 to 8000 in the config file to make this work. refer this page this might be useful How to Change Apache HTTP Port in Linux.

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