extract-oci-archive
Use when you need to extract an OCI archive to inspect its contents, get the rootfs layer, or read the image config.
来源信息
- 仓库
- coreos/chunkah
- 最近来源活动
- 2026年4月30日 02:31
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SKILL.md
来源说明 · 只读预览- name
- extract-oci-archive
- description
- Use when you need to extract an OCI archive to inspect its contents, get the rootfs layer, or read the image config.
# Extract OCI Archive
## Extract the OCI archive structure
```bash
mkdir /tmp/oci-extracted
tar -xf /path/to/image.ociarchive -C /tmp/oci-extracted
```
## Get the manifest digest from index.json
```bash
MANIFEST=$(jq -r '.manifests[0].digest' /tmp/oci-extracted/index.json \
| cut -d: -f2)
```
## Extract a layer to get the rootfs
For a single-layer image:
```bash
LAYER=$(jq -r '.layers[0].digest' \
/tmp/oci-extracted/blobs/sha256/${MANIFEST} | cut -d: -f2)
mkdir /tmp/rootfs
tar -xf /tmp/oci-extracted/blobs/sha256/${LAYER} -C /tmp/rootfs
```
For multi-layer images, extract each layer in order and overlay them.
## Read the image config
The config contains the created timestamp, entrypoint, labels, etc.:
```bash
CONFIG=$(jq -r '.config.digest' \
/tmp/oci-extracted/blobs/sha256/${MANIFEST} | cut -d: -f2)
jq . /tmp/oci-extracted/blobs/sha256/${CONFIG}
```
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