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bigbangtflauncher's Introduction

Big Bang Terraform Start

Prerequisites

  • Linux or MacOS (runs a bash script to return information about Istio's LoadBalancers)
  • terraform
  • kubectl
  • jq
  • base64

Getting Started

An example of a project that uses this Terraform module can be found here.

Instructions

Using a vars file:

# Copy and edit with your values
cp terraform.tfvars.example terraform.tfvars

terraform init
terraform plan
terraform apply

Using environment variables:

# Update with your values
export TF_VAR_registry_credentials='[{registry="registry1.dso.mil",username="REPLACE_ME",password="REPLACE_ME"}]'

#Optional: Reduce flux resource requests for edge/resource constrained environments
export TF_VAR_reduce_flux_resources=true

terraform init
terraform plan
terraform apply

Using inline arguments:

# Update with your values inline
terraform init
terraform plan -var 'registry_credentials=[{registry="registry1.dso.mil",username="REPLACE_ME",password="REPLACE_ME"}]'
terraform apply -var 'registry_credentials=[{regsitry="registry1.dso.mil",username="REPLACE_ME",password="REPLACE_ME"}]'

Requirements

Name Version
terraform >= 0.13
kubectl >= 1.7.0

Providers

Name Version
external n/a
kubectl >= 1.7.0
kubernetes n/a

Inputs

Name Description Type Default Required
registry_credentials System-wide registry credentials to be applied so Kubernetes can pull container images. Creds for registry1.dso.mil are required, and you can optionally provide any other creds for other private registries as well 
list(object({
    registry = string
    username = string
    password = string
  }))
 n/a yes
big_bang_manifest_file Path to the root k8s yaml manifest. Typically contains a Namespace, GitRepository, and Kustomization. See https://repo1.dso.mil/platform-one/quick-start/big-bang/-/blob/master/bigbang/start.yaml for example string "k8s/start.yaml" no
custom_credentials Any custom credentials needed for custom BigBang implementation 
list(object({
    namespace = string
    name      = string
    username  = string
    password  = string
  }))
 [] no
custom_flux_file Path to the optional custom flux k8s yaml manifest string "" no
kube_conf_file Path to the KUBECONFIG file to use to connect to the cluster. If the file passed has multiple contexts in it the correct context is expected to already be set in contexts.current-context. string "~/.kube/config" no

Outputs

Name Description
external_load_balancer JSON array with information on all LoadBalancer services in the istio-system namespace. Example output:
[
  {
    "name": "public-ingressgateway",
    "ip": "192.0.2.0",
    "hostname": "null"
  },
  {...}
]

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