part01-docker-provider

About The Template

This Terraform configuration file describes infrastructure as code for deploying a Docker container running the Nginx web server.

What is happening in template ?

In the main.tf file three resources are defined: A docker image resource, A docker container resource and a Docker network resource.

The Docker image resource:

This resource pulls the latest version of the Nginx image specified in the var.nginx_image_version defined in variables.tf and allows the option to keep the image locally in the var.keep_locally and force to remove the image var.force_remove.

resource "docker_image" "nginx" {
  name         = var.nginx_image_version
  keep_locally = var.keep_locally
  force_remove = var.force_remove
}

The Docker container resource:

This resource creates a container based on pulled Nginx image by the docker image resource. The docker-container resource maps the container's port 80 to the host's port 8000, sets the container hostname, domain name and restart policy, and mounts a host directory as a volume in the container. You can check the variables in variables.tf file to check what is passed.

resource "docker_container" "nginx" {
  # The attribute "latest" is deprecated.
  image      = docker_image.nginx.latest
  hostname   = var.container_host_name
  name       = var.container_name
  domainname = var.container_host_name
  restart    = var.container_restart
  ports {
    internal = var.internal_container_port
    external = var.external_container_port
  }

  volumes {
    container_path = var.container_path
    host_path      = var.host_path
    read_only      = var.read_only
  }
}

The Docker network resource.

And the last resource creates a private network for the container as defined in the var.container_network. Finally, a simple note will be printed Everything is ok

resource "docker_network" "private_network" {
  name   = var.container_network.name
  driver = var.container_network.driver
}


output "output_p" {
  value = "every thing is ok!"
}

How to run ?

$ terraform init
$ terraform validate
$ terraform fmt
$ terraform plan
$ terraform apply

for delete:

$ terraform destroy