Install Terraform by following this guide.

Purpose :- We are installing GO to support custom Kubernetes resource type ‘K8s_manifest’ for resources not supported by terraform. Install GO using below commands. (GO version > 1.9 is required)

curl -O https://storage.googleapis.com/golang/go1.11.2.linux-amd64.tar.gz
tar -xvf go1.11.2.linux-amd64.tar.gz
sudo mv go /usr/local

Set Go’s root value, which tells Go where to look for its files.

sudo nano ~/.profile

Add the below environment variables at the bottom in the opened profile file

export GOPATH=$HOME/work
export PATH=$PATH:/usr/local/go/bin:$GOPATH/bin

Run the below command as well to refresh your profile

source ~/.profile

Verify your installation by

go version

This variables are required for terraform to authenticate with GCP project using ‘admin-sa’ service account. You may require to export them with new terminal sessions.

export GOOGLE_APPLICATION_CREDENTIALS="/path/to/admin-sa-key.json"

GOPATH variable is required for the installation directory of GO.

export GOPATH=$HOME/work
export PATH=$PATH:/usr/local/go/bin:$GOPATH/bin

Get this provider on your local system by running below command. This will take significant time to get all dependencies required by go for terraform usage.

go get -u github.com/harishsearce/terraform-provider-k8s

Once done create/update the ‘~/.terraformrc’ file with below lines :

providers { k8s = "$GOPATH/bin/terraform-provider-k8s" }

Set the Kubeconfig paths in main.tf providers as per local file system. Generally /home/foo/.kube/config

provider "k8s" {
  kubeconfig = "/path/to/kubeconfig"
}

provider "kubernetes" {
  config_path = "/path/to/kubeconfig"
}

Once all the things are setup as mentioned in above steps, we can proceed with terraform init and apply.

Change the yaml files specific to the module

terraform get -update

terraform apply -target=module.postgre