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Azure Automation Runbook: LetsEncryptRunbook

Azure Automation Runbook to renew LetsEncrypt certificates on Azure Application Gateway.

Requirements

  • Azure Storage Account
  • Azure Automation Account
    • AzureRM.Profile
    • AzureRM.Network
    • AzureRM.Storage
    • AzureRM.KeyVault
    • Posh-ACME
  • Azure Application Gateway
    • :80 Listener, redirecting to Storage Account URL
  • Valid DNS A record

Variables

Mandatory

[string] $emailAddress                     # Email address for renewals
[string] $domainName                       # Domain name to request the certificate for (i.e.: test.contoso.com)
[string] $storageAccountResourceGroupName  # Resource Group name in which the Storage Account resides
[string] $storageAccountName               # Storage Account name
[string] $blobContainerName                # Name of the blob container
[string] $appGatewayResourceGroupName      # Resource Group name in which the Application Gateway resides
[string] $appGatewayName                   # Application Gateway name
[string] $certificateName                  # Desired name of the certificate or name of the existing certificate

Optional

[string] $stagingMode                      # If set to true, will use (invalid) LetsEncrypt certificates for testing purposes
[string] $keyVaultName                     # If set, will use Azure Key Vault to store certificate

Scheduling/invoking

LetsEncrypt advises that you set the renewals to monthly recurring. You may do so under your Runbook > Schedules. Alternatively, for one-time calls, create a Webhook in that same menu.

Contributing

Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.

Please make sure to update tests as appropriate.