Docker on Oracle Cloud Plataform

Let's create a simples REST API using Docker, Oracle Cloud Instance with Ubuntu OS and Autonomous Database.

Accessing VM on Oracle Cloud

1. Elevate permissions of private key with chmod 400 <key_name>.key
2. Use SSH to enter on CLI of VM with ssh -i <key_name>.key <username>@<public_ip>

Generating docker image

1. On root folder, create the image running:

docker build -t sampleapi -f docker/Dockerfile backend/sampleapi/

2. Run container with

docker run -d -p 80:80 --name sampleapi sampleapi

Deploy API on VM

1. Firstly, download you code on VM to create the image locally. I will use git for clone this repo on Oracle VM typing git clone https://github.com/peedroca/docker-oracle-cloud.git
2. Go to cloned repo with cd docker-oracle-cloud, and than I will run the code above to generate and run my container. Maybe you need execute the command with sudo permission like: sudo docker build ...
3. I can test the container execution just typing curl http://localhost/WeatherForecast

Open port to access API outside of VM

1. On cloud platform go to Instances > Primary VNIC > Subnet > Security Lists.
2. Add an Ingress Rules with configuration:

{
    "Stateless": false,
    "Source Type": "CIDR",
    "Source CIDR": "0.0.0.0/0",
    "IP Protocol": "TCP",
    "Source Port Range": "All",
    "Destination Port Range": "80",
    "Description": "Sample API"
}

3. Test using the Public IP like http://<public_ip>/WeatherForecast.