Importing Openstack resources to terraform

Importing Openstack resources to terraform.txt

1. On linux using brew package manager instatll terraform and terraformer 

https://brew.sh/
https://docs.brew.sh/Homebrew-on-Linux


    1  sudo yum -y install https://packages.endpoint.com/rhel/7/os/x86_64/endpoint-repo-1.9-1.x86_64.rpm
    2  sudo yum install git
    3  rpm -Uvh http://www.city-fan.org/ftp/contrib/yum-repo/rhel7/x86_64/city-fan.org-release-2-1.rhel7.noarch.rpm
    4  sudo rpm -Uvh http://www.city-fan.org/ftp/contrib/yum-repo/rhel7/x86_64/city-fan.org-release-2-1.rhel7.noarch.rpm
    5  yum-config-manager --disable city-fan.org
    6  sudo yum-config-manager --disable city-fan.org
    7  sudo yum --enablerepo=city-fan.org install libcurl libcurl-devel
    8  /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
    9  test -d ~/.linuxbrew && eval $(~/.linuxbrew/bin/brew shellenv)
   10  test -d /home/linuxbrew/.linuxbrew && eval $(/home/linuxbrew/.linuxbrew/bin/brew shellenv)
   11  test -r ~/.bash_profile && echo "eval \$($(brew --prefix)/bin/brew shellenv)" >>~/.bash_profile
   12  echo "eval \$($(brew --prefix)/bin/brew shellenv)" >>~/.profile
   13  brew install hashicorp/tap/terraform
   14  brew install terraform
   15  brew install terraformer


2. To install Openstack environement 

launch a vm with the following specifications and follow 

CentOS 8.3 with 8GB RAM , 2 vCPUs and 40GB disk space


https://gist.github.com/kiranchavala/7d8e8e67b72a8c60e3d113e416e5d0b6

3. Create a provider.tf file with the following content

mkdir -p test

cd test

vi provider.tf

terraform {
  required_providers {
    openstack = {
      source = "terraform-provider-openstack/openstack"
      version = "1.43.0"
    }
  }
}

provider "openstack" {
  # Configuration options
}


terraform init


6. To import all the existing resources from your opne stack 



Download the rc from openstack 

https://docs.openstack.org/ocata/user-guide/common/cli-set-environment-variables-using-openstack-rc.html



export OS_DOMAIN_NAME=Default


terraformer import openstack --resources=compute,networking --regions=RegionOne






 tree
.
├── generated
│   └── openstack
│       ├── compute
│       │   └── RegionOne
│       │       ├── compute_instance_v2.tf
│       │       ├── outputs.tf
│       │       ├── provider.tf
│       │       └── terraform.tfstate
│       └── networking
│           └── RegionOne
│               ├── networking_secgroup_rule_v2.tf
│               ├── networking_secgroup_v2.tf
│               ├── outputs.tf
│               ├── provider.tf
│               └── terraform.tfstate
├── provider.tf
└── terraform.tfstate



7. Now we can control the exisitng resources


cd genrated/openstack/compute/RegionOne


[kiran@acp415finaleap RegionOne]$ terraform state replace-provider -auto-approve "openstack" "terraform-provider-openstack/openstack/"
╷
│ Error: Invalid "to" provider "registry.terraform.io/terraform-provider-openstack/openstack/"
│
│ Invalid provider source string: The "source" attribute must be in the format "[hostname/][namespace/]name"



[root@acp415finaleap RegionOne]# terraform state replace-provider -auto-approve "openstack" "hashicorp/terraform-provider-openstack/terraform-provider-openstack"
╷
│ Error: Invalid "to" provider "hashicorp/terraform-provider-openstack/terraform-provider-openstack"
│
│ Invalid provider type: Provider source "hashicorp/terraform-provider-openstack/terraform-provider-openstack" has a type with the prefix "terraform-provider-", which isn't valid. Although that prefix is often used in the names of
│ version control repositories for Terraform providers, provider source strings should not include it.



As a workaround 


Rename the exisitng the  terraform.tfstate to backup


Change the provider.tf to change the source 

terraform {
  required_providers {
    openstack = {
      source = "terraform-provider-openstack/openstack"
      version = "1.43.0"
    }
  }
}

provider "openstack" {
  # Configuration options
}



Then perform 

terraform init

terraform refresh


 
8. To change the setting of a resource after editing the respective resource tf file
 
terraform plan
 
terraform apply


ref

https://brew.sh/
https://docs.brew.sh/Homebrew-on-Linux

https://github.com/GoogleCloudPlatform/terraformer

https://learn.hashicorp.com/tutorials/terraform/state-import?in=terraform/state&utm_source=WEBSITE&utm_medium=WEB_IO&utm_offer=ARTICLE_PAGE&utm_content=DOCS#limitations-and-other-considerations