goci-io/aws-cert-manager-helm

Deploys Cert-Manager using Helm, required AWS resources and letsencrypt ClusterIssuer

aws-cert-manager-helm

Maintained by @goci-io/prp-terraform

This module deploys cert-manager using helm on AWS (Kubernetes). A reference to another terraform module state can be specified to read the issuer private key. Another option is to reference a file providing the private key in pem format. The IAM role required to change DNS records in Rotue53 is created and applied to the cluster issuer. Currently only one deployment of an Issuer is supported.

The default version of the helm chart is currently an alpha version to support automatically creating CustomResourceDefinition's with correct configuration and namespace. The version used for now is v0.15.0-alpha.2. If you dont need automated installation of CRDs you can change the version for example to v0.14.2 (current stable at the moment of writing).

Usage

module "cert_manager" {
  source                = "git::https://github.com/goci-io/aws-cert-manager-helm.git?ref=tags/<latest-version>"
  namespace             = "goci"
  stage                 = "corp"
  region                = "eu1"
  name                  = "cert-manager"
  dns_zone              = "corp.eu1.goci.io"
  issuer_email          = "certs<at>@goci.io"
  ca_private_key_secret = "/etc/ssl/my-ca.pem"
}

Use a module for the private key ref

1. Create a LetsEncrypt Account using this module
2. Expose an output called account_key_pem containing the private key in pem format (makred as sensitive)
3. Store state of the letsencrypt module for example on S3 under /letsencrypt/terraform.tfstate
4. Configure this module to use the remote state of the existing module:

module "cert_manager" {
  ...
  ca_module_state = "letsencrypt/terraform.tfstate"
  tf_bucket       = "my-terraform-state-bucket"
}

Grant Access to multiple Zones

module "cert_manager" {
  ...

  # Grant all Zones
  iam_role_zone_grants = ["*"]
}

You can also provide specific Hosted Zone IDs.

Creating Issuer

You can either let this module create a ClusterIssuer or Issuer (default). An issue is bound to the namespace cert-manager will be deployed into. Specify issuer_type to set your desired issuer type.