deckhand/doc/source/api_ref.rst

Deckhand API Documentation

API

This API will only support YAML as a serialization format. Since the IETF does not provide an official media type for YAML, this API will use application/x-yaml.

This is a description of the v1.0 API. Documented paths are considered relative to /api/v1.0.

PUT /bucket/{bucket_name}/documents

Accepts a multi-document YAML body and creates a new revision that updates the contents of the bucket_name bucket. Documents from the specified bucket that exist in previous revisions, but are absent from the request are removed from that revision (though still accessible via older revisions).

Documents in other buckets are not changed and will be included in queries for documents of the newly created revision.

Updates are detected based on exact match to an existing document of schema + metadata.name. It is an error that responds with 409 Conflict to attempt to PUT a document with the same schema + metadata.name as an existing document from a different bucket in the most-recent revision.

This endpoint is the only way to add, update, and delete documents. This triggers Deckhand's internal schema validations for all documents.

If no changes are detected, a new revision should not be created. This allows services to periodically re-register their schemas without creating unnecessary revisions.

GET /revisions/{revision_id}/documents

Returns a multi-document YAML response containing all the documents matching the filters specified via query string parameters. Returned documents will be as originally added with no substitutions or layering applied.

Supported query string parameters:

• schema - string, optional - The top-level schema field to select. This may be partially specified by section, e.g., schema=promenade would select all kind and version schemas owned by promenade, or schema=promenade/Node which would select all versions of promenade/Node documents. One may not partially specify the namespace or kind, so schema=promenade/No would not select promenade/Node/v1 documents, and schema=prom would not select promenade documents.
• metadata.name - string, optional
• metadata.layeringDefinition.abstract - string, optional - Valid values are the "true" and "false".
• metadata.layeringDefinition.layer - string, optional - Only return documents from the specified layer.
• metadata.label - string, optional, repeatable - Uses the format metadata.label=key=value. Repeating this parameter indicates all requested labels must apply (AND not OR).
• sort - string, optional, repeatable - Defines the sort order for returning results. Default is by creation date. Repeating this parameter indicates use of multi-column sort with the most significant sorting column applied first.
• status.bucket - string, optional, repeatable - Used to select documents only from a particular bucket. Repeating this parameter indicates documents from any of the specified buckets should be returned.

GET /revisions/{revision_id}/rendered-documents

Returns a multi-document YAML of fully layered and substituted documents. No abstract documents will be returned. This is the primary endpoint that consumers will interact with for their configuration.

Valid query parameters are the same as for /revisions/{revision_id}/documents, minus the paremters in metadata.layeringDetinition, which are not supported.

GET /revisions

Lists existing revisions and reports basic details including a summary of validation status for each deckhand/ValidationPolicy that is part of that revision.

Supported query string parameters:

• tag - string, optional, repeatable - Used to select revisions that have been tagged with particular tags.

Sample response:

---
count: 7
next: https://deckhand/api/v1.0/revisions?limit=2&offset=2
prev: null
results:
  - id: 1
    url: https://deckhand/api/v1.0/revisions/1
    createdAt: 2017-07-14T21:23Z
    buckets: [mop]
    tags: [a, b, c]
    validationPolicies:
      site-deploy-validation:
        status: failure
  - id: 2
    url: https://deckhand/api/v1.0/revisions/2
    createdAt: 2017-07-16T01:15Z
    buckets: [flop, mop]
    tags: [b]
    validationPolicies:
      site-deploy-validation:
        status: success

DELETE /revisions

Permanently delete all documents.

Warning

This removes all revisions and resets the data store.

GET /revisions/{{revision_id}}

Get a detailed description of a particular revision. The status of each ValidationPolicy belonging to the revision is also included. Valid values for the status of each validation policy are:

• success - All validations associated with the policy are success.
• failure - Any validation associated with the policy has status failure, expired or missing.

Sample response:

---
id: 1
url: https://deckhand/api/v1.0/revisions/1
createdAt: 2017-07-14T021:23Z
buckets: [mop]
tags:
  a:
    name: a
    url: https://deckhand/api/v1.0/revisions/1/tags/a
validationPolicies:
  site-deploy-validation:
    url: https://deckhand/api/v1.0/revisions/1/documents?schema=deckhand/ValidationPolicy/v1&name=site-deploy-validation
    status: failure
    validations:
      - name: deckhand-schema-validation
        url: https://deckhand/api/v1.0/revisions/1/validations/deckhand-schema-validation/0
        status: success
      - name: drydock-site-validation
        status: missing
      - name: promenade-site-validation
        url: https://deckhand/api/v1.0/revisions/1/validations/promenade-site-validation/0
        status: expired
      - name: armada-deployability-validation
        url: https://deckhand/api/v1.0/revisions/1/validations/armada-deployability-validation/0
        status: failure

Validation status is always for the most recent entry for a given validation. A status of missing indicates that no entries have been created. A status of expired indicates that the validation had succeeded, but the expiresAfter limit specified in the ValidationPolicy has been exceeded.

GET /revisions/{{revision_id}}/diff/{{comparison_revision_id}}

This endpoint provides a basic comparison of revisions in terms of how the buckets involved have changed. Only buckets with existing documents in either of the two revisions in question will be reported; buckets with documents that are only present in revisions between the two being compared are omitted from this report. That is, buckets with documents that were accidentally created (and then deleted to rectify the mistake) that are not directly present in the two revisions being compared are omitted.

The response will contain a status of created, deleted, modified, or unmodified for each bucket.

The ordering of the two revision ids is not important.

For the purposes of diffing, the revision_id "0" is treated as a revision with no documents, so queries comparing revision "0" to any other revision will report "created" for each bucket in the compared revision.

Diffing a revision against itself will respond with the each of the buckets in the revision as unmodified.

Diffing revision "0" against itself results in an empty dictionary as the response.

Examples

A response for a typical case, GET /api/v1.0/revisions/6/diff/3 (or equivalently GET /api/v1.0/revisions/3/diff/6).

---
bucket_a: created
bucket_b: deleted
bucket_c: modified
bucket_d: unmodified

A response for diffing against an empty revision, GET /api/v1.0/revisions/0/diff/6:

---
bucket_a: created
bucket_c: created
bucket_d: created

A response for diffing a revision against itself, GET /api/v1.0/revisions/6/diff/6:

---
bucket_a: unmodified
bucket_c: unmodified
bucket_d: unmodified

Diffing two revisions that contain the same documents, GET /api/v1.0/revisions/8/diff/11:

---
bucket_e: unmodified
bucket_f: unmodified
bucket_d: unmodified

Diffing revision zero with itself, GET /api/v1.0/revisions/0/diff/0:

---
{}

POST /revisions/{{revision_id}}/validations/{{name}}

Add the results of a validation for a particular revision.

An example POST request body indicating validation success:

---
status: success
validator:
  name: promenade
  version: 1.1.2

An example POST request indicating validation failure:

POST /api/v1.0/revisions/3/validations/promenade-site-validation
Content-Type: application/x-yaml

---
status: failure
errors:
  - documents:
      - schema: promenade/Node/v1
        name: node-document-name
      - schema: promenade/Masters/v1
        name: kubernetes-masters
    message: Node has master role, but not included in cluster masters list.
validator:
  name: promenade
  version: 1.1.2

GET /revisions/{{revision_id}}/validations

Gets the list of validations which have been reported for this revision.

Sample response:

---
count: 2
next: null
prev: null
results:
  - name: deckhand-schema-validation
    url: https://deckhand/api/v1.0/revisions/4/validations/deckhand-schema-validation
    status: success
  - name: promenade-site-validation
    url: https://deckhand/api/v1.0/revisions/4/validations/promenade-site-validation
    status: failure

GET /revisions/{{revision_id}}/validations/{{name}}

Gets the list of validation entry summaries that have been posted.

Sample response:

---
count: 1
next: null
prev: null
results:
  - id: 0
    url: https://deckhand/api/v1.0/revisions/4/validations/promenade-site-validation/0/entries/0
    status: failure

GET /revisions/{{revision_id}}/validations/{{name}}/entries/{{entry_id}}

Gets the full details of a particular validation entry, including all posted error details.

Sample response:

---
name: promenade-site-validation
url: https://deckhand/api/v1.0/revisions/4/validations/promenade-site-validation/entries/0
status: failure
createdAt: 2017-07-16T02:03Z
expiresAfter: null
expiresAt: null
errors:
  - documents:
      - schema: promenade/Node/v1
        name: node-document-name
      - schema: promenade/Masters/v1
        name: kubernetes-masters
    message: Node has master role, but not included in cluster masters list.

POST /revisions/{{revision_id}}/tags/{{tag}}

Associate the revision with a collection of metadata, if provided, by way of a tag. The tag itself can be used to label the revision.

Sample request with body:

POST ``/revisions/0615b731-7f3e-478d-8ba8-a223eab4757e/tags/foobar``
Content-Type: application/x-yaml

---
thing: bar

Sample response:

Content-Type: application/x-yaml
HTTP/1.1 201 Created
Location: https://deckhand/api/v1.0/revisions/0615b731-7f3e-478d-8ba8-a223eab4757e/tags/foobar

---
tag: foobar
data:
  thing: bar

Sample request without body:

POST ``/revisions/0615b731-7f3e-478d-8ba8-a223eab4757e/tags/foobar``
Content-Type: application/x-yaml

Sample response:

Content-Type: application/x-yaml
HTTP/1.1 201 Created
Location: https://deckhand/api/v1.0/revisions/0615b731-7f3e-478d-8ba8-a223eab4757e/tags/foobar

---
tag: foobar
data: {}

GET /revisions/{{revision_id}}/tags

List the tags associated with a revision.

Sample request with body:

GET ``/revisions/0615b731-7f3e-478d-8ba8-a223eab4757e/tags``

Sample response:

Content-Type: application/x-yaml
HTTP/1.1 200 OK

---
- tag: foo
  data:
    thing: bar
- tag: baz
  data:
    thing: qux

GET /revisions/{{revision_id}}/tags/{{tag}}

Show tag details for tag associated with a revision.

Sample request with body:

GET ``/revisions/0615b731-7f3e-478d-8ba8-a223eab4757e/tags/foo``

Sample response:

Content-Type: application/x-yaml
HTTP/1.1 200 OK

---
tag: foo
data:
  thing: bar

DELETE /revisions/{{revision_id}}/tags/{{tag}}

Delete tag associated with a revision.

Sample request with body:

GET ``/revisions/0615b731-7f3e-478d-8ba8-a223eab4757e/tags/foo``

Sample response:

Content-Type: application/x-yaml
HTTP/1.1 204 No Content

DELETE /revisions/{{revision_id}}/tags

Delete all tags associated with a revision.

Sample request with body:

GET ``/revisions/0615b731-7f3e-478d-8ba8-a223eab4757e/tags``

Sample response:

Content-Type: application/x-yaml
HTTP/1.1 204 No Content

POST /rollback/{target_revision_id}

Creates a new revision that contains exactly the same set of documents as the revision specified by target_revision_id.