Azure Terraform Quickstart template

Use this template to easily create a new Git Repository for managing Jenkins X cloud infrastructure needs.

We recommend using Terraform to manange the infrastructure needed to run Jenkins X. There are a number of cloud resources which may need to be created such as:

• Kubernetes cluster
• Storage buckets for long term storage of logs
• IAM Bindings to manage permissions for applications using cloud resources

Jenkins X likes to use GitOps to manage the lifecycle of both infrastructure and cluster resources. This requires two Git Repositories to achieve this:

• Infrastructure git repository: infrastructure resources will be managed by Terraform and will keep resources in sync.
• Cluster git repository: the Kubernetes specific cluster resources will be managed by Jenkins X and keep resources in sync.

Prerequisites

• A Git organisation that will be used to create the GitOps repositories used for Jenkins X below. e.g. https://github.com/organizations/plan.

• Create a git bot user (different from your own personal user) e.g. https://github.com/join and generate a personal access token, this will be used by Jenkins X to interact with git repositories. e.g. https://github.com/settings/tokens/new?scopes=repo,read:user,read:org,user:email,write:repo_hook,delete_repo,admin:repo_hook

• This bot user needs to have write permission to write to any git repository used by Jenkins X. This can be done by adding the bot user to the git organisation level or individual repositories as a collaborator Add the new bot user to your Git Organisation, for now give it Owner permissions, we will reduce this to member permissions soon.

• Install terraform CLI - see here

• Install jx CLI - see here

Git repositories

We use 2 git repositories:

• Infrastructure git repository for the Terraform configuration to setup/upgrade/modify your cloud infrastructure (kubernetes cluster, IAM accounts, IAM roles, buckets etc)
• Cluster git repository to contain the helmfile.yaml file to define the helm charts to deploy in your cluster

We use separate git repositories since the infrastructure tends to change rarely; whereas the cluster git repository changes a lot (every time you add a new quickstart, import a project, release a project etc).

Often different teams look after infrastructure; or you may use tools like Terraform Cloud to process changes to infrastructure & review changes to infrastructure more closely than promotion of applications.

Getting started

Note: remember to create the Git repositories below in your Git Organisation rather than your personal Git account else this will lead to issues with ChatOps and automated registering of webhooks.

1. Create and clone your Infrastructure git repo from this GitHub Template https://github.com/jx3-gitops-repositories/jx3-terraform-azure/generate

   Note: Ensure Owner is the name of the Git Organisation that will hold the GitOps repositories used for Jenkins X.

2. Create a Cluster git repository; choosing your desired secrets store, either Vault or Azure Key Vault:

   • Vault: https://github.com/jx3-gitops-repositories/jx3-azure-vault/generate

   • Azure Key Vault: https://github.com/jx3-gitops-repositories/jx3-azure-akv/generate

   Note: Ensure Owner is the name of the Git Organisation that will hold the GitOps repositories used for Jenkins X.

3. You need to configure the git URL of your Cluster git repository (which contains helmfile.yaml) into the Infrastructure git repository (which contains main.tf).

So from inside a git clone of the Infrastructure git repository (which already has the files main.tf and values.auto.tfvars inside) you need to link to the other Cluster repository (which contains helmfile.yaml) by committing the required terraform values from below to your values.auto.tfvars, e.g.

cat <<EOF >> values.auto.tfvars    
jx_git_url = "https://github.com/$git_owner_from_cluster_template_above/$git_repo_from_cluster_template_above"
EOF

The contents of your values.auto.tfvars file should look something like this ....

jx_git_url = "https://github.com/myowner/myname-cluster"
jx_bot_username = "bot_user"

4. commit and push any changes to your Infrastructure git repository:

git commit -a -m "fix: configure cluster repository and project"
git push

5. Now define 2 environment variables to pass the bot user and token into Terraform:

export TF_VAR_jx_bot_token=my-bot-token

6. Now, initialise, plan and apply Terraform:

terraform init

terraform plan

terraform apply

Connect to the cluster

$(terraform output connect)

Tail the Jenkins X installation logs

$(terraform output follow_install_logs)

Once finished you can now move into the Jenkins X Developer namespace

jx ns jx

and create or import your applications

jx project

Terraform Inputs

Name	Description	Type	Default	Required
apex_domain_integration_enabled	Flag that when set attempts to create delegation records in apex domain to point to domain created by this module	bool	false	no
apex_domain_name	The name of the parent/apex domain in which to create this domain zone, e.g. jenkins-x.io. Required if dns_enabled set to true	string	""	no
apex_resource_group_name	The resource group in which the Azure DNS apex domain resides. Required if apex_domain_integration_enabled is true	string	""	no
cluster_name	Variable to provide your desired name for the cluster. The script will create a random name if this is empty	string	""	no
cluster_network_model	Variable to define the network model for the cluster. Valid values are either kubenet or azure	string	"kubenet"	no
cluster_node_resource_group_name	Resource group name in which to provision AKS cluster nodes. The script will create a random name if this is empty	string	""	no
cluster_resource_group_name	The name of the resource group in to which to provision AKS managed cluster. The script will create a random name if this is empty	string	""	no
cluster_version	Kubernetes version to use for the AKS cluster	string	"1.18.10"	no
dns_enabled	Flag that when set creates an Azure DNS zone for JX	bool	false	no
dns_prefix	DNS prefix for the cluster. The script will create a random name if this is empty	string	""	no
dns_resource_group_name	Resource group in which to create the Azure DNS zone. The script will create a random name if this is empty	string	""	no
domain_name	The domain name of the zone to create, e.g. dev-subdomain. Required if dns_enabled set to true	string	""	no
enable_log_analytics	Flag to indicate whether to enable Log Analytics integration for cluster	bool	false	no
jx_bot_token	Bot token used to interact with the Jenkins X cluster git repository	string	n/a	yes
jx_bot_username	Bot username used to interact with the Jenkins X cluster git repository	string	n/a	yes
jx_git_url	URL for the Jenkins X cluster git repository	string	n/a	yes
key_vault_enabled	Flag to indicate whether to provision Azure Key Vault for secret storage	string	true	no
key_vault_name	Name of Azure Key Vault to create	string	""	no
key_vault_resource_group_name	Resource group to create in which to place key vault	string	""	no
key_vault_sku	SKU of the Key Vault resource to create. Valid values are standard or premium	string	"standard"	no
location	The Azure region in to which to provision the cluster	string	"australiaeast"	no
logging_retention_days	Number of days to retain logs in Log Analytics if enabled	number	30	no
network_name	The name of the Virtual Network in Azure to be created. The script will create a random name if this is empty	string	""	no
network_resource_group_name	The name of the resource group in to which to provision network resources. The script will create a random name if this is empty	string	""	no
node_count	The number of worker nodes to use for the cluster	number	2	no
node_size	The size of the worker node to use for the cluster	string	"Standard_B2ms"	no
storage_resource_group_name	Resource group to create in which to place storage accounts	string	""	no
subnet_cidr	The CIDR of the provisioned subnet within the vnet_cidr to to which worker nodes are placed	string	"10.8.0.0/24"	no
subnet_name	The name of the subnet in Azure to be created. The script will create a random name if this is empty	string	""	no
vnet_cidr	The CIDR of the provisioned Virtual Network in Azure in to which worker nodes are placed	string	"10.8.0.0/16"	no

Cleanup

To remove any cloud resources created here run:

terraform destroy

Contributing

When adding new variables please regenerate the markdown table

terraform-docs markdown table .

and replace the Inputs section above

Formatting

When developing please remember to format codebase before raising a pull request

terraform fmt -check -diff -recursive