mirror of
https://github.com/netbox-community/netbox-docker.git
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83 lines
1.9 KiB
Bash
83 lines
1.9 KiB
Bash
#!/bin/bash
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# Retrieves image configuration from public images in DockerHub
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# Functions from https://gist.github.com/cirocosta/17ea17be7ac11594cb0f290b0a3ac0d1
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# Optimised for our use case
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get_image_label() {
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local label=$1
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local image=$2
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local tag=$3
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local token
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token=$(_get_token "$image")
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local digest
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digest=$(_get_digest "$image" "$tag" "$token")
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local retval="null"
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if [ "$digest" != "null" ]; then
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retval=$(_get_image_configuration "$image" "$token" "$digest" "$label")
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fi
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echo "$retval"
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}
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get_image_layers() {
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local image=$1
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local tag=$2
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local token
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token=$(_get_token "$image")
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_get_layers "$image" "$tag" "$token"
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}
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get_image_last_layer() {
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local image=$1
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local tag=$2
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local token
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token=$(_get_token "$image")
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local layers
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mapfile -t layers < <(_get_layers "$image" "$tag" "$token")
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echo "${layers[-1]}"
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}
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_get_image_configuration() {
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local image=$1
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local token=$2
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local digest=$3
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local label=$4
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curl \
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--silent \
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--location \
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--header "Authorization: Bearer $token" \
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"https://registry-1.docker.io/v2/$image/blobs/$digest" \
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| jq -r ".config.Labels.\"$label\""
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}
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_get_token() {
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local image=$1
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curl \
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--silent \
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"https://auth.docker.io/token?scope=repository:$image:pull&service=registry.docker.io" \
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| jq -r '.token'
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}
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_get_digest() {
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local image=$1
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local tag=$2
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local token=$3
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curl \
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--silent \
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--header "Accept: application/vnd.docker.distribution.manifest.v2+json" \
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--header "Authorization: Bearer $token" \
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"https://registry-1.docker.io/v2/$image/manifests/$tag" \
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| jq -r '.config.digest'
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}
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_get_layers() {
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local image=$1
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local tag=$2
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local token=$3
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curl \
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--silent \
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--header "Accept: application/vnd.docker.distribution.manifest.v2+json" \
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--header "Authorization: Bearer $token" \
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"https://registry-1.docker.io/v2/$image/manifests/$tag" \
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| jq -r '.layers[].digest'
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}
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