47 lines
1.5 KiB
Markdown
47 lines
1.5 KiB
Markdown
---
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description: |
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The checksum post-processor computes specified checksum for the artifact list
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from an upstream builder or post-processor. All downstream post-processors will
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see the new artifacts. The primary use-case is compute checksum for artifacts
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allows to verify it later.
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So firstly this post-processor get artifact, compute it checksum and pass to
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next post-processor original artifacts and checksum files.
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layout: docs
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page_title: 'Checksum Post-Processor'
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...
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# Checksum Post-Processor
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Type: `checksum`
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The checksum post-processor computes specified checksum for the artifact list
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from an upstream builder or post-processor. All downstream post-processors will
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see the new artifacts. The primary use-case is compute checksum for artifact to
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verify it later.
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After computes checksum for artifacts, you can use new artifacts with other
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post-processors like
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[artifice](https://www.packer.io/docs/post-processors/artifice.html),
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[compress](https://www.packer.io/docs/post-processors/compress.html),
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[docker-push](https://www.packer.io/docs/post-processors/docker-push.html),
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[atlas](https://www.packer.io/docs/post-processors/atlas.html), or a third-party
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post-processor.
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## Basic example
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The example below is fully functional.
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``` {.javascript}
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{
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"type": "checksum"
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}
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```
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## Configuration Reference
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Optional parameters:
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- `checksum_types` (array of strings) - An array of strings of checksum types
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to compute. Allowed values are md5, sha1, sha224, sha256, sha384, sha512.
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- `output` (string) - Specify filename to store checksums.
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