Muzaffer AKYIL This workflow corresponds to n8n.io template #2835 — we link there as the canonical source.
This workflow follows the Emailsend → HTTP Request recipe pattern — see all workflows that pair these two integrations.
The workflow JSON
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{
"nodes": [
{
"id": "6b1865a7-f150-4d2b-b1f7-37c68b2173d6",
"name": "Fetch Manifest Digest",
"type": "n8n-nodes-base.httpRequest",
"position": [
920,
-300
],
"parameters": {
"url": "={{\"https://<<your-registry-url>>/v2/\" + $json.name + \"/manifests/\" + $json.tag}}",
"options": {
"fullResponse": true
},
"authentication": "genericCredentialType",
"genericAuthType": "httpBasicAuth",
"headerParametersUi": {
"parameter": [
{
"name": "Accept",
"value": "application/vnd.docker.distribution.manifest.v2+json, application/vnd.oci.image.manifest.v1+json, application/vnd.oci.image.index.v1+json, application/vnd.docker.distribution.manifest.list.v2+json"
}
]
}
},
"typeVersion": 2
},
{
"id": "3c1daca9-3897-4596-b62d-db561f8cb047",
"name": "Remove Old Tags",
"type": "n8n-nodes-base.httpRequest",
"onError": "continueErrorOutput",
"position": [
840,
-40
],
"parameters": {
"url": "={{\"https://<<your-registry-url>>/v2/\" + $json.image + \"/manifests/\" + $json.tag.digest}}",
"options": {},
"requestMethod": "DELETE",
"authentication": "genericCredentialType",
"genericAuthType": "httpBasicAuth",
"headerParametersUi": {
"parameter": [
{
"name": "Accept",
"value": "application/vnd.docker.distribution.manifest.v2+json"
}
]
}
},
"typeVersion": 2
},
{
"id": "6974749e-8c85-4334-a7e7-e964f057ed6f",
"name": "Retrieve Image Tags",
"type": "n8n-nodes-base.httpRequest",
"position": [
400,
-300
],
"parameters": {
"url": "={{\"https://<<your-registry-url>>/v2/\" + $json[\"image\"] + \"/tags/list\"}}",
"options": {},
"authentication": "genericCredentialType",
"genericAuthType": "httpBasicAuth",
"headerParametersUi": {
"parameter": [
{
"name": "Accept",
"value": "application/vnd.docker.distribution.manifest.v2+json, application/vnd.oci.image.manifest.v1+json, application/vnd.oci.image.index.v1+json, application/vnd.docker.distribution.manifest.list.v2+json"
}
]
}
},
"typeVersion": 2
},
{
"id": "30857c32-508e-4f95-8e26-c9f2fc84e074",
"name": "List Images",
"type": "n8n-nodes-base.httpRequest",
"position": [
40,
-300
],
"parameters": {
"url": "https://<<your-registry-url>>/v2/_catalog",
"options": {},
"authentication": "genericCredentialType",
"genericAuthType": "httpBasicAuth"
},
"typeVersion": 2
},
{
"id": "c5965a6a-28e6-4217-a846-a849de153430",
"name": "Extract Image Names",
"type": "n8n-nodes-base.code",
"position": [
220,
-300
],
"parameters": {
"jsCode": "const images = items[0].json.repositories;\nreturn images.map(image => ({ json: { image } }));"
},
"typeVersion": 2
},
{
"id": "b13eb6e5-1a16-4992-b0bd-9b228559fecf",
"name": "Identify Tags to Remove",
"type": "n8n-nodes-base.code",
"position": [
600,
-40
],
"parameters": {
"jsCode": "const result = [];\n\nfor (const item of items) {\n const tags = item.json.tags;\n if (tags) {\n const latestTag = tags.includes('latest') ? 'latest' : null;\n const sortedTags = tags.filter(tag => tag !== 'latest')\n .sort((a, b) => new Date(b.created) - new Date(a.created));\n const keepTags = sortedTags.slice(0, 10);\n if (latestTag) keepTags.push('latest');\n const deleteTags = sortedTags.slice(10);\n result.push(...deleteTags.map(tag => ({ json: { image: item.json.name, tag } })));\n }\n}\n\nreturn result;\n"
},
"typeVersion": 2
},
{
"id": "da15ae49-09ee-4658-86a5-9b0a2180c637",
"name": "Scheduled Trigger",
"type": "n8n-nodes-base.scheduleTrigger",
"position": [
-140,
-300
],
"parameters": {
"rule": {
"interval": [
{
"triggerAtHour": 1
}
]
}
},
"typeVersion": 1.2
},
{
"id": "bcc347be-5520-46c0-aac9-0b14ddd8b184",
"name": "Send Notification Email",
"type": "n8n-nodes-base.emailSend",
"position": [
840,
180
],
"parameters": {
"text": "=Image : {{ $json.image }}\nTag : {{ $json.tag.tag }}\n\nRemoved",
"options": {},
"subject": "Docker Registry Cleaner Notification",
"toEmail": "user@example.com",
"fromEmail": "user@example.com",
"emailFormat": "text"
},
"typeVersion": 2.1
},
{
"id": "2c3770ef-cb4c-4007-8897-f4eb7ad3b7cf",
"name": "Split Tags",
"type": "n8n-nodes-base.splitOut",
"position": [
580,
-300
],
"parameters": {
"include": "selectedOtherFields",
"options": {
"destinationFieldName": "tag"
},
"fieldToSplitOut": "tags",
"fieldsToInclude": "name"
},
"typeVersion": 1
},
{
"id": "4fffa947-02cf-4608-acab-8284250cf622",
"name": "Filter Valid Tags",
"type": "n8n-nodes-base.filter",
"position": [
740,
-300
],
"parameters": {
"options": {},
"conditions": {
"options": {
"version": 2,
"leftValue": "",
"caseSensitive": true,
"typeValidation": "strict"
},
"combinator": "and",
"conditions": [
{
"id": "bb56b84e-e7cb-4867-93f8-ac40c71bde4f",
"operator": {
"type": "string",
"operation": "notEmpty",
"singleValue": true
},
"leftValue": "={{ $json.tag }}",
"rightValue": ""
},
{
"id": "acd8e00c-5fa0-4c62-ba96-9e6f456f7703",
"operator": {
"type": "string",
"operation": "notEmpty",
"singleValue": true
},
"leftValue": "={{ $json.name }}",
"rightValue": ""
}
]
}
},
"typeVersion": 2.2
},
{
"id": "c023ba14-d12d-497c-9b30-97db04a34c1b",
"name": "Fetch Manifest Digest for Blob",
"type": "n8n-nodes-base.httpRequest",
"position": [
-120,
-40
],
"parameters": {
"url": "={{\"https://<<your-registry-url>>/v2/\" + $('Filter Valid Tags').item.json.name + \"/blobs/\" + $json.body.config.digest}}",
"options": {
"fullResponse": false
},
"authentication": "genericCredentialType",
"genericAuthType": "httpBasicAuth",
"headerParametersUi": {
"parameter": [
{
"name": "Accept",
"value": "application/vnd.docker.distribution.manifest.v2+json"
}
]
}
},
"typeVersion": 2
},
{
"id": "f054b91e-abd4-4854-9bfa-e4a2b70f7e2c",
"name": "Update Fields",
"type": "n8n-nodes-base.set",
"position": [
60,
-40
],
"parameters": {
"options": {},
"assignments": {
"assignments": [
{
"id": "c970bdb8-ddbf-486b-a716-c66274a248a7",
"name": "name",
"type": "string",
"value": "={{ $('Filter Valid Tags').item.json.name }}"
},
{
"id": "7ce79761-6557-413c-a9a6-5d1ca564a3df",
"name": "tag",
"type": "string",
"value": "={{ $('Filter Valid Tags').item.json.tag }}"
},
{
"id": "45948a25-d35c-4e3f-9556-3d52a1a89f80",
"name": "created",
"type": "string",
"value": "={{ $json.created }}"
},
{
"id": "c73a14ad-91f6-477f-b4c3-037db319b9ee",
"name": "digest",
"type": "string",
"value": "={{ $('Fetch Manifest Digest').item.json.headers['docker-content-digest'] }}"
}
]
}
},
"typeVersion": 3.4
},
{
"id": "54405505-8445-491a-8f5d-232da8c842d2",
"name": "Group Tags by Image",
"type": "n8n-nodes-base.code",
"position": [
420,
-40
],
"parameters": {
"jsCode": "const groupedData = items.reduce((acc, item) => {\n const name = item.json.name;\n if (!acc[name]) {\n acc[name] = [];\n }\n acc[name].push({\n tag: item.json.tag,\n created: item.json.created,\n digest: item.json.digest\n });\n return acc;\n}, {});\n\nreturn Object.keys(groupedData).map(name => ({\n json: { name, tags: groupedData[name] }\n}));\n"
},
"typeVersion": 2
},
{
"id": "980aab86-44cd-47d5-b3b7-42cbae26eb09",
"name": "Sort by Creation Date",
"type": "n8n-nodes-base.sort",
"position": [
240,
-40
],
"parameters": {
"options": {},
"sortFieldsUi": {
"sortField": [
{
"order": "descending",
"fieldName": "created"
}
]
}
},
"typeVersion": 1
},
{
"id": "0561efb9-4903-4bec-bc1a-8131e5f5de67",
"name": "Send Failure Notification Email",
"type": "n8n-nodes-base.emailSend",
"position": [
1120,
80
],
"parameters": {
"text": "=Image : {{ $json.image }}\nTag : {{ $json.tag.tag }}\n\nFailed",
"options": {},
"subject": "[FAIL] Docker Registry Cleaner Notification",
"toEmail": "user@example.com",
"fromEmail": "user@example.com",
"emailFormat": "text"
},
"typeVersion": 2.1
},
{
"id": "eaa28914-351c-4934-ba1c-0d39faf67ef3",
"name": "Execute Garbage Collection",
"type": "n8n-nodes-base.ssh",
"position": [
1120,
-100
],
"parameters": {
"cwd": "/opt/services/",
"command": "docker compose exec -it -u root registry bin/registry garbage-collect --delete-untagged /etc/docker/registry/config.yml",
"authentication": "privateKey"
},
"typeVersion": 1
}
],
"connections": {
"Split Tags": {
"main": [
[
{
"node": "Filter Valid Tags",
"type": "main",
"index": 0
}
]
]
},
"List Images": {
"main": [
[
{
"node": "Extract Image Names",
"type": "main",
"index": 0
}
]
]
},
"Update Fields": {
"main": [
[
{
"node": "Sort by Creation Date",
"type": "main",
"index": 0
}
]
]
},
"Remove Old Tags": {
"main": [
[
{
"node": "Execute Garbage Collection",
"type": "main",
"index": 0
}
],
[
{
"node": "Send Failure Notification Email",
"type": "main",
"index": 0
}
]
]
},
"Filter Valid Tags": {
"main": [
[
{
"node": "Fetch Manifest Digest",
"type": "main",
"index": 0
}
]
]
},
"Scheduled Trigger": {
"main": [
[
{
"node": "List Images",
"type": "main",
"index": 0
}
]
]
},
"Extract Image Names": {
"main": [
[
{
"node": "Retrieve Image Tags",
"type": "main",
"index": 0
}
]
]
},
"Group Tags by Image": {
"main": [
[
{
"node": "Identify Tags to Remove",
"type": "main",
"index": 0
}
]
]
},
"Retrieve Image Tags": {
"main": [
[
{
"node": "Split Tags",
"type": "main",
"index": 0
}
]
]
},
"Fetch Manifest Digest": {
"main": [
[
{
"node": "Fetch Manifest Digest for Blob",
"type": "main",
"index": 0
}
]
]
},
"Sort by Creation Date": {
"main": [
[
{
"node": "Group Tags by Image",
"type": "main",
"index": 0
}
]
]
},
"Identify Tags to Remove": {
"main": [
[
{
"node": "Remove Old Tags",
"type": "main",
"index": 0
},
{
"node": "Send Notification Email",
"type": "main",
"index": 0
}
]
]
},
"Fetch Manifest Digest for Blob": {
"main": [
[
{
"node": "Update Fields",
"type": "main",
"index": 0
}
]
]
}
}
}
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About this workflow
This template is designed to automatically clean up old image tags in the Docker registry and perform garbage collection. List all images in the registry Preserve the last 10 tags for each image (latest tag is always preserved) Delete old tags Email notification for…
Source: https://n8n.io/workflows/2835/ — original creator credit. Request a take-down →
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