Add support for Artifact Registry package mirrors#407
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Currently, OS packages are downloaded directly from the OS vendor's mirrors, requiring outgoing Internet access for the database host. Although it works, it presents data exfiltration risks and is not inline with a secure-by-default configuration. This changes adds a new, optional Terraform variable `enable_os_package_mirror` that, for Oracle Linux deployments, configures an Artifact Registry remote repostiory (https://docs.cloud.google.com/artifact-registry/docs/repositories/remote-repo) covering Base OS and Appstream repositories. It requires IAM permissions to use the repository: `artifactregistry.admin` for the Terraform runner, and `artifactregistry.reader` for the database VM's service account. The VPC must have Private Google Access enabled. Current support is limited to Google Cloud VMs running non-free editions, with Oracle Linux. For RHEL environments, which already use private repositories accessible via Private Google Access, this variable has no effect. Sample output: https://gist.github.com/mfielding/a731a5ae604b02f9c60519cb6acd7f52
* For clarity and consistency, removing "AR Mirror" references in favor or "AR Repo" or "AR Remote Repo" * Added (and documented) a new parameter --ar-repo-url with the base URL of the Artifact Registry remote repo * Added a validation to error out if attempted with free edition * I couldn't find a clean way to avoid the disabling of all repositories, as we actually want to fix yum updates post-install too. So adding some verbiage to the user guide. * Keeping NTP as-is, as a RAC-only thing; NTP is deprecated in our current supported OSes anyway. * Updating data guard presubmit tests to use this AR configuration, and not to have Internet access. (Free edition tests remain as-is.) Sample output from an install run in a VPC without Internet access: https://gist.github.com/mfielding/7b474a2142f1554481ec9ffab3e5c345
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For the presubmit tests, I'd rather not grant firewall modification permissions, so I'm removing the firewall creation knob. Also updating Terraform docs to note the permissions required for Artifact Registry.
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AlexBasinov
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Feb 6, 2026
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[APPROVALNOTIFIER] This PR is APPROVED This pull-request has been approved by: AlexBasinov, mfielding The full list of commands accepted by this bot can be found here. The pull request process is described here DetailsNeeds approval from an approver in each of these files:
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Currently, OS packages are downloaded directly from the OS vendor's mirrors, requiring outgoing Internet access for the database host. Although it works, it presents data exfiltration risks and is not in line with a secure-by-default configuration.
This changes adds a new, optional Terraform variable
enable_os_package_mirrorthat, for Oracle Linux deployments,configures an Artifact Registry remote repository (https://docs.cloud.google.com/artifact-registry/docs/repositories/remote-repo) covering Base OS and Appstream repositories.
It requires IAM permissions to use the repository:
artifactregistry.adminfor the Terraform runner, andartifactregistry.readerfor the database VM's service account. The VPC must have Private Google Access enabled.Current support is limited to Google Cloud VMs running non-free editions, with Oracle Linux. For RHEL environments, which already use private repositories accessible via Private Google Access, this variable has no effect.
Sample output, in a VPC without Internet access: https://gist.github.com/mfielding/7b474a2142f1554481ec9ffab3e5c345