手动迁移Terraform状态文件后执行terraform plan报错及状态文件读取异常问题求助

Let me break down exactly what's going on here, and put your mind at ease about running terraform apply:

First: The State File Path Rule for Local Backend #

When you removed the Azure backend config, Terraform defaults to using the local backend. This backend expects the state file (terraform.tfstate) to live directly in your working directory root (your project/ folder). The .terraform/ directory is Terraform's internal working space—it stores provider plugins, module caches, and cached state copies for remote backends. It’s not meant for you to manually drop state files into.

Why the Two Behaviors Are Different #

• When you put terraform.tfstate in project/: Terraform correctly recognizes this as the primary state file for the local backend. Even though the state was generated with Terraform 1.0.2, Terraform 1.1.9 is fully backward-compatible with state version 4 (used by all 0.13+ releases). It reads the state correctly, compares it to your config, and reports no changes—this is exactly what you want.
• When you put terraform.tfstate in .terraform/: You’re overriding a file that Terraform uses for internal caching (usually for remote backends). Terraform doesn’t expect this file to be manually modified, so when it tries to read it, it misinterprets the old state format as incompatible with its internal cache structure, throwing that misleading version error. The error isn’t about the state version itself—it’s about putting the file in the wrong place.

Is It Safe to Run terraform apply? #

Absolutely—here’s why:

1. Your terraform plan already confirmed your local config matches the existing infrastructure state. No unexpected resource changes will happen.
2. The only thing terraform apply will do here is upgrade the state file’s metadata (like updating the terraform_version field to 1.1.9). This is a harmless operation that doesn’t touch your AWS VPC resources at all.
3. For extra peace of mind, run terraform state pull before applying to see the state content—you’ll notice no infrastructure changes, only minor updates to the state file’s internal format.

Pro Tip for Future Work #

To avoid version mismatches going forward, consider using a version manager like tfenv to lock your Terraform version to match the original environment (or coordinate with the other team to standardize on a single version). This eliminates subtle compatibility hiccups entirely.

内容的提问来源于stack exchange，提问作者LazyEval