terraform with docker

nickollas Docker, Terraform

1 – Download terraform cli binary and put it on /usr/local/bin

2 – create the main.tf file

cat > ~/main.tf <<'EOF'
# configure docker provider
provider "docker" {
  version = "~> 2.7"
  host = "tcp://127.0.0.1:2375"
}

# create a image
resource "docker_image" "alpine" {
  name = "alpine"
}

# create a container (it will run for 1 day)
resource "docker_container" "foo" {
  image    = "alpine"
  name     = "foo"
  command = ["sleep", "1d"]

  hostname = "foo"

  volumes {
    host_path = "/path/to/virtual_disk"
    container_path = "/mnt"
    read_only = false
  }
}
EOF

3 – create a working directory “.terraform” and get the docker provider binary

terraform init

4 – show the execution plan (optional) 

terraform plan

5 – create or change the infrastructure

terraform apply

6 – see the state of docker container

docker ps -a

7 – execute commands in the container

docker exec foo ip -4 addr
docker exec foo sh -c 'ip -4 addr; hostname'

8 – enter in the container

docker exec -it foo sh

Links:
https://www.terraform.io/docs/providers/docker/index.html
https://www.terraform.io/docs/providers/docker/r/container.html

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