Build and deploy a golang Docker image using Terraform? - docker

Question

I am trying to setup auto deployment in Terraform to Docker of my golang server.
I have it working if I am deploying manually, but can't get the terraform config working.
Here is what I have.
resource "docker_image" "terraform_golang" {
name = "terraform_golang"
build {
path = "./../"
build_arg = {
tag : "golang-server"
}
label = {
author : "Bill"
}
}
}
resource "docker_container" "terraform_backend" {
image = docker_image.terraform_golang.latest
name = "Terraform_Backend"
env = [ "database=172.19.0.3:3306" ]
ports {
internal = 8080
external = 8080
}
network_mode = "bridge"
networks_advanced {
name = "golang-server"
}
}
This is the error I get:
│ Error: failed to solve with frontend dockerfile.v0: failed to read dockerfile: Error processing tar file(exit status 1): unexpected EOF
│
│
│
│ with module.terraform.docker_image.terraform_golang,
│ on terraform\backend.tf line 2, in resource "docker_image" "terraform_golang":
│ 2: resource "docker_image" "terraform_golang" {
Here is my manual deployment cmd, which is working:
docker build . -t golang-server
docker run --network=golang-server --name=golang-server --env database=172.19.0.3:3306 --expose=8080 -p=8080:8080/tcp golang-server
Here is my dockerfile:
FROM golang:1.18
WORKDIR $GOPATH/src
COPY . .
RUN go get -d -v ./...
RUN go install -v ./...
EXPOSE 8080
CMD ["golang-server"]
My folder structure is setup such that my terraform files are in a subfolder, in a module, I hope this doesn't mess with anything:

Answer 1

"path" only changes the context path, not the path where to find the docker file. Honestly feels like a bug since the docker command defaults to PATH/Dockerfile as a docker file path, but that's how the terraform plugin currently works.
What you need is to add a dockerfile parameter to point to the actual Dockerfile;
resource "docker_image" "terraform_golang" {
name = "terraform_golang"
build {
dockerfile = "../Dockerfile"
path = ".."
build_arg = {
tag : "golang-server"
}
label = {
author : "Bill"
}
}
}