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A VMware-to-Proxmox migration exposed hidden IaC assumptions

goncharov.xyz 11 min read Editor score 7/10

A team moving hundreds of Terraform-managed VMs found that templates, initialization, storage selection and partial deployment failures did not transfer cleanly between hypervisors. The lessons are useful for engineers planning infrastructure migrations while preserving mature automation workflows.

What: Moving from VMware to Proxmox is not just a hypervisor swap; existing infrastructure-as-code assumptions can break.
How: Packer and Ansible built templates, Terraform provisioned VMs, and Ansible configured workloads.
Why it matters: Engineers migrating IaC must revisit template building, VM initialization, storage selection, and partial-failure handling.

The excerpt's VMware IaC workflow moves from template creation to provisioning and workload configuration. Sketched from the article's own text.

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