How can i pass variables from jenkins file to terraform - jenkins-pipeline

Question

when i run terraform with local variables inside variable.tf everything work like a charm
i want to pass Jenkins parameters inside terraform variable.tf file so it will be dynamic from Jenkins
how can i achieve it?
pipeline {
agent any
options {
skipDefaultCheckout true
}
environment {
TF_VAR_datacenter="${DATA_CENTER}"
TF_VAR_cluster="${CLUSTER}"
TF_VAR_esxi="${ESXI}"
TF_VAR_datastore="${DATASTORE}"
TF_VAR_network="${NETWORK}"
TF_VAR_server_hostname="${SERVER_HOSTNAME}"
TF_VAR_server_mac="${SERVER_MAC}"
}
parameters {
string(name: 'DATA_CENTER', defaultValue: 'xxx', description: 'vcenter data center',)
string(name: 'CLUSTER', defaultValue: 'xxx', description: 'data center cluster',)
string(name: 'ESXI', defaultValue: 'xxx', description: 'esxi hostname',)
string(name: 'DATASTORE', defaultValue: 'xxx', description: 'data center datastore',)
string(name: 'NETWORK', defaultValue: 'xxx', description: 'data center network',)
string(name: 'SERVER_HOSTNAME', defaultValue: 'xxx', description: 'server hostname',)
string(name: 'SERVER_MAC', defaultValue: 'xxx', description: 'server mac',)
string(name: 'SERVER_IP', defaultValue: 'xxx', description: 'server ip',)
string(name: 'SERVER_NETMASK', defaultValue: 'xxx', description: 'server netmask',)
string(name: 'SERVER_GATEWAY', defaultValue: 'xxx', description: 'server gateway',)
string(name: 'COBBLER_PROFILE', defaultValue: 'xxx', description: 'cobbler profile',)
choice(name: 'BUILD_DESTROY', description: '', choices: ['build' , 'destroy'])
}
stages {
stage('OS PROVISION') {
steps {
dir("/root/terraform"){
sh """
export TF_VAR_datacenter=${DATA_CENTER}
export TF_VAR_cluster=${CLUSTER}
export TF_VAR_esxi=${ESXI}
export TF_VAR_datastore=${DATASTORE}
export TF_VAR_network=${NETWORK}
export TF_VAR_server_hostname=${SERVER_HOSTNAME}
export TF_VAR_server_mac=${SERVER_MAC}
terraform init
terraform apply -auto-approve
"""
}
}
}
}
post {
always {
echo 'This will always run'
}
}
}

Answer 1

I prefer use this format:
terraform apply \
-var 'vpc_id=$(AWS_VPC_ID)' \
-var 'subnet_id=$(AWS_SUBNET_ID)' \
-var 'aws_region=$(AWS_REGION)' \
-var 'ami_id=$(AMI_ID)'\
-var 'instance_type=$(AWS_EC2_TYPE)' \
-var 'key_pair=$(KEY_PAIR_NAME)' \
-var 'tags={ "Owner":"$(OWNER)", "Service":"$(SERVICE)", "Terraform":"true", "Env":"$(ENV)" }'

Answer 2

Your question needs a bit more clarity, but I am going to make a few educated guesses.
with local variables inside variable.tf
Do you mean locals {, or what exactly do you mean by local variables?
pass Jenkins parameters inside terraform variable.tf file
This isn't the right file to 'pass parameters'. *.tf files are for declaring variables.
You are probably looking at *.tfvars files.
You have 3 options with *.tfvars files:
a file named exactly terraform.tfvars
a file named <anything>.auto.tfvars
a file named <anything>.tfvars which you reference using the -var-file CLI parameter.
The format of *.tfvars files is simply:
var1_name = var1_value
You can (must) use the usual HCL markup fo trings, lists, maps, ...