# Shipyard API
Logically, the API has three parts to handle the three areas of functionality in Shipyard.
1. Document Staging
2. Action Handling
3. Airflow Monitoring
## Naming used in the API
* Resource paths nodes follow an all lower case naming scheme, and pluralize the resource names. Nodes that refer to keys, ids or names that are externally controlled, the external naming will be honored.
* The version of the API resource path will be prefixed before the first node of the path for that resource using v#.# format.
* By default, the API will be namespaced by /api before the version. For the purposes of documentation, this will not be specified in each of the resource paths below. In more complex APIs, it makes sense to allow the /api node to be more specific to point to a particular service.
```
/api/v1.0/sampleresources/ExTeRnAlNAME-1234
^ ^ ^ ^
| | | defer to external naming
| | plural
| lower case
version here
```
## Standard Error Responses
There are several standard error responses that should be handled appropriately by a client of this API. Those errors listed here are not exhaustive, but shouldconsidered possible for all API invocations.
* 401 Authentication Error
If not authenticated
* 403 Forbidden
If not authorized
* 404 Not found
If a variable in the path doesn't reference a valid resource
* 503 Service Unavailable
Error if an upstream system cannot be reached (e.g. Deckhand for documents, Airflow for actions)
## Headers
### Required
* X-Auth-Token
The auth token to identify the invoking user.
### Optional
* X-Context-Marker
A context id that will be carried on all logs for this cleint-provided marker. This marker may only be a 36-character canonical representation of an UUID (8-4-4-4-12)
---
## Document Staging API
>Shipyard will serve as the entrypoint for documents and secrets into a site. At any point in time, there will be two represented versions of documents in a site that are accessible via this API.
>
>* The lastDeployed version, which represents the last version of documents that successfully completed deployment. The lastDeployed tag will be applied by Shipyard at the successful completion of certain workflows, to indicate a baseline design for the site.
>* The staged version, which represents the document set that has been ingested by this API since the lastDeployed version.
>
> All versions of documents rely upon Deckhand for storage. Shipyard will rely upon the tagging features of Deckhand of to find the appropriate lastDeployed and staged version.
---
### /v1.0/configdocs
Represents the site configuration documents
#### Payload Structure
The documents (commonly yaml), in a format understood by Deckhand
#### POST
Ingests site configuration documents. Synchronous.
##### Responses
* 201 Created
If the documents are successfully ingested, even with validation failures. Response message includes:
* a list of validation results
The response headers will include a Location indicating the GET endpoint to retrieve the configDocs
#### GET
Returns the source documents for the most recently staged version
##### Query Parameters
* lastDeployed=true|**false**
Return the documents for the currently deployed version instead of the most recently staged
* compiled=true|**false**
Return the documents in their compiled state instead of source documents
##### Responses
* 200 OK
If documents can be retrieved.
#### DELETE
Updates the configDocs to be the lastDeployed versions in deckhand, effectively discarding any staged documents. If there is no prior deployed version this effectively removes all configDocs.
##### Responses
* 204 No Content
---
### /v1.0/secrets
Represents the secrets documents that will be used in combination with the config docs.
#### Payload Structure
The secrets documents in a format understood by Deckhand
#### POST
Ingest new secrets documents.
##### Responses
* 201 Created
If the documents are successfully ingested, even with validation failures. Response message includes:
* a list of validation results
The response headers will include a Location indicating the GET endpoint to retrieve the configDocs
#### GET
Return the secrets documents
##### Query Parameters
* lastDeployed=true|**false**
Return the documents for the currently deployed version instead of the most recently staged
* compiled=true|**false**
Return the documents in their compiled state instead of source documents
##### Responses
* 200 OK
If documents can be retrieved.
#### DELETE
Updates the secrets to be the lastDeployed versions in deckhand, effectively discarding any staged documents. If there is no prior deployed version this effectively removes all secrets.
##### Responses
* 204 No Content
---
### /v1.0/validations
Represents the validation messages for the documents in deckhand
#### Payload Structure
The list of validations
```
[
{ TBD }
]
```
#### GET
Returns the validations
##### Query Parameters
* lastDeployed=true|**false**
Return the documents for the currently deployed version instead of the most recently staged
##### Responses
* 200 OK
If the validations can be retrieved.
---
## Action API
>The Shipyard Action API is a resource that allows for creation, control and investigation of triggered workflows. These actions encapsulate a command interface for the Unercloud Platform.
See [Action Commands](API_action_commands.md) for supported actions
---
### /v1.0/actions
#### Payload Structure
A list of actions that have been executed through shipyard's action API.
```
[
{ Action objects summarized, TBD },
...
]
```
#### GET
Returns the list of actions in the system that have been posted, and are accessible to the current user.
##### Responses
* 200 OK
If the actions can be retrieved.
#### POST
Creates an action in the system. This will cause some action to start.
The input body to this post will represent an action object that has at least these fields:
* name
The name of the action to invoke. This is likely to map to the actual DAG Names, but may be mapped for "nicer" values.
* parameters
A dictionary of parameters to use for the trigger invocation. The supported parameters will vary for the action invoked.
```
{
"name" : "action name",
"parameters" : { varies by action }
}
```
The POST will synchrounously create the action (a shell object that represents a DAG invocation), perform any checks to validate the preconditions to run the DAG, and trigger the invocation of the DAG.
The DAG will run asynchronously in airflow.
##### Responses
* 201 Created
If the action is created successfully, and all preconditions to run the DAG are successful. The response body is the action entity created.
* 400 Bad Request
If the action name doesn't exist, or the payload is otherwise malformed.
* 409 Conflict
For any failed validations. The response body is the action entity created, with the failed validations. The DAG will not begin execution in this case.
---
### /v1.0/actions/{action_id}
Each action will be assigned an unique id that can be used to get details for the action, including the execution status.
#### Payload Structure
All actions will include fields that indicate the following data:
* id (assigned during POST)
* name - the name of the action - likely to be the DAG Names, but may be mapped for "nicer" values.
* parameters - a dictionary of the parameters configuring the action.
* tracking info - (user, time, etc)
* action_lifecycle value:
* Pending
* Validation Failed
* Processing
* Complete
* Failed
* DAG_status - representing the status that airflow provides for an executing DAG
* validations - a list of validations that have been done, including any status information for those validations. During the lifecycle of the DAG, this list of validations may continue to grow.
* steps - the list of steps for this action, including the status for that step.
```
{ TBD }
```
#### GET
Returns the action entity for the specified id.
##### Responses
* 200 OK
---
### /v1.0/actions/{action_id}/validationdetails/{validation_id}
Allows for drilldown to validation detailed info.
#### Payload Structure
The detailed information for a validation
```
{ TBD }
```
#### GET
Returns the validation detail by Id for the supplied action Id.
##### Responses
* 200 OK
---
### /v1.0/actions/{action_id}/steps/{step_id}
Allow for drilldown to step information. The step information includes details of the steps excution, successful or not, and enough to facilitate troubleshooting in as easy a fashion as possible.
#### Payload Structure
The detailed information representing a single step of execution as part of an action
```
{ TBD }
```
#### GET
Returns the details for a step by id for the given action by Id.
##### Responses
* 200 OK
---
### /v1.0/actions/{action_id}/{control_verb}
Allows for issuing DAG controls against an action.
#### Payload Structure
None, there is no associated body for this resource
#### POST
Trigger a control action against an activity.- this includes: pause, unpause
##### Responses
* 202 Accepted
---
## Airflow Monitoring API
>Airflow has a primary function of scheduling DAGs, as opposed to Shipyard's primary case of triggering DAGs.
Shipyard provides functionality to allow for an operator to monitor and review these scheduled workflows (DAGs) in addition to the ones triggered by Shipyard. This API will allow for accessing Airflow DAGs of any type -- providing a peek into the totality of what is happening in Airflow.
---
### /v1.0/workflows
The resource that represents DAGs (workflows) in airflow
#### Payload Structure
A list of objects representing the DAGs that have run in airflow.
```
[
{TBD},
...
]
```
#### GET
Queries airflow for DAGs that are running or have run (successfully or unsuccessfully) and provides a summary of those things.
##### Query parameters
* elapsedDays={n}
optional, the number of days of history to retrieve. Default is 30 days.
##### Responses
* 200 OK
---
### /v1.0/workflows/{id}
#### Payload Structure
An object representing the information available from airflow regarding a DAG's execution
```
{ TBD }
```
#### GET
Further details of a particular scheduled DAG's output
##### Responses
* 200 OK