Pulp

# Pulp 3.0.0 Minimum Viable Product (MVP)

<span style="color:red;">Lines highlighted in red need more attention.</span>

## Overall Guarantees

  - This is not a direct replacement for Pulp 2.

  - This is the minimum required for a 3.0.0 beta and GA.

  - All REST API calls will update the DB using transactions as necessary to ensure data integrity.  

    <span style="color:red;">\* All REST API responses will be paginated.</span>

## Authentication

As an authenticated user I can manage user(s). \[done\]

  - Add a user

  - View user(s)

  - Update any user detail

  - Delete a user

As an API user, I can authenticate any API call with Basic auth \[done\]

As an authenticated user, I can filter users by: \[[3142](https://pulp.plan.io/issues/3142)\]

  - username: (equality, username_in_list)

## Repositories

As an authenticated user, I can list all repos.

  - All fields are included \[done\]

  - Pagination is supported \[done\]

As an authenticated user I can use filters on Repositories list: \[[3079](https://pulp.plan.io/issues/3079)\]

  - name: (equality, name_in_list)

As an authenticated user, I can CRUD a repository

  - Create a repo \[done\]

  - Read a repo \[done\]

  - Update all mutable repo fields (asynchronous) \[done\]

  - Delete a repo (asynchronous)

As an authenticated user, when viewing a repository, I can discover a URL to the latest version of a repository. \[done\]\[[3235](https://pulp.plan.io/issues/3235)\]

## Remotes

note: Remote attributes will commonly be available on remotes, but aren't guaranteed to be used by all remotes.

As an authenticated user, I can CRUD an remote

  - Create an remote

  - Read an remote

  - Update all mutable remote fields (asynchronous)

  - Delete an remote (asynchronous)

As an authenticated user, I have filters on the Remote list: \[[3080](https://pulp.plan.io/issues/3080)\]

  - name: (equality, name_in_list)

As an authenticated user I can configure the following attributes on an Remote: \[done\]

  - validate (bool) \[optional: defaults to True\]: If true, the plugin will validate imported content.

  - ssl_ca_certificate (str) \[optional\] String containing a PEM encoded CA certificate used to validate the server certificate presented by the external source.

  - ssl_client_certificate (str) \[optional\] Contains a PEM encoded client certificate used for authentication.

  - ssl_client_key (str) \[optional\] Contains a PEM encoded private key used for authentication.

  - ssl_validation (bool) \[optional: defaults to True\]: If true, SSL peer validation must be performed.

  - proxy_url (str) \[optional\] Contains the proxy URL. Format: scheme://user:password@host:port.

  - username (str) \[optional\] Contains the username to be used for authentication when syncing.

  - password (str) \[optional\] Contains the password to be used for authentication when syncing.

  - name (str) \[required\] Contains the name.

  - last_updated (datetime) \[read-only\] Contains the datetime of the last remote update.

  - last_synced (datetime) \[read-only\] Contains the datetime of the last remote sync.

## Publishers

note: Publisher attributes will commonly be available on publishers, but aren't guaranteed to be used by all publishers.

As an authenticated user, I can CRUD a publisher

  - Create a publisher

  - Read a publisher

  - Update all mutable publisher fields (asynchronous)

  - Delete a publisher (asynchronous)

As an authenticated user, I have filters on the Publisher list: \[[3081](https://pulp.plan.io/issues/3081)\]

  - name: (equality, name_in_list)

As an authenticated user I can configure the following attributes on a Publisher:

  - relative_path (str) \[optional\] The (relative) path component of the published url.

  - name (str) \[required\] contains the name.

  - last_published (datetime) \[read-only\] When the last successful publis%{color:red}h occurred.

  - last_updated (datetime) \[read-only\] The datetime of the last publisher update.

## Distributions

As an authenticated user, I can CRUD Distributions:

  - Create a Distribution.

  - Read a Distribution

  - List Distributions

  - Update all mutable Distribution fields (synchronous)  

    \- base path

  - Delete an Distribution (synchronous)

As a user, my distribution base paths don't conflict and my create/update is rejected identifying the conflicting distributions \[[2987](https://pulp.plan.io/issues/2987)\]

As an authenticated user, I can create or update a distribution that is not associated with any publication (NULL)

As an authenticated user, I can create or update a distribution that is not associated with any publisher/repository (NULL)

  - publisher and repository are used together. If one is null, both must be null.

As a user, I can update a Distribution to distribute a specific Publication  

As a user, I want a newly created publication to be automatically served by the content as defined by distributions.

As a user, I can see the full urls my base path is served at  

As an authenticated user, I have filters on the Distribution list: \[[3082](https://pulp.plan.io/issues/3082)\]%

  - name: (equality, name_in_list) 

  - base_path: (equality, substring, base_path_in_list)

## Publications

As an authenticated user, when creating a Publication, I can post a repo version href to be published. \[[3221](https://pulp.plan.io/issues/3221)\]

As an authenticated user, I can publish a repository's latest version by posting a repository href to be published. \[[3223](https://pulp.plan.io/issues/3223)\]

As an authenticated user, I can view which repository version was used to create a particular publication. \[[3237](https://pulp.plan.io/issues/3237)\]

As an authenticated user, I can read Publication(s)

  - Read a Publication - id, created datetime, list of distribution hrefs, repo version

  - List all Publications - ordered by created datetime in descending order

As an authenticated user, I can delete publications.  

\- asynchronously with a lock on the repository version.  

\- prevented if associated with a distribution.  

\- single object only.

As an authenticated user, I can list publications and I have enough information to choose which ones to delete.

  - choose by created (older ones or perhaps latest)

  - choose not associated to a distribution.

  - does not imply filtering

As an authenticated user, I can list publications and i have enough information to select a publication to be associated with a distribution.

  - choose by created (latest or just by publish date)

      - manual promotion. "My rawhide publication has been tested and now I want to promote it to stable".

      - rollback to an earlier publication.

  - does not imply filtering

As an authenticated user, I can determine if and how a publication is distributed.

## Exporters

<span style="color:black;">As a plugin writer, I can contribute an exporter that is discovered by core</span>  

<span style="color:black;">As a plugin writer, I have docs on how to create a discoverable exporter</span>  

<span style="color:black;">As a plugin writer, I can contribute an exporter that uses a publication.</span>

## Artifacts

As an authenticated user, I can create an Artifact by uploading a file. \[done\]

As an authenticated user, I can optionally specify a size and/or digest to validate the uploaded file. \[done\]

## Content Units

As an authenticated user, I can create a content unit.

As an authenticated user, I can read and list content units.  

<span style="color:red;">\* As an authenticated user, I can filter content by repository version</span>

<span style="color:red;">As an authenticated user, I can delete a specific content unit if it is not in any repository version. (orphan)</span>

  - Error message saying that the unit is in use by a repo version and a link to the filter to return all of the repo versions.

  - As a user, I know that files (Artifacts) associated with the Content unit are not removed by this call (docs)

## Versioned Repositories

#### CRD

As an authenticated user, I can list versions for a particular repository. \[done\]

  - Pagination is supported

As an authenticated user, I can filter repository versions by: \[[3238](https://pulp.plan.io/issues/3238)\]

  - number (equality, lt/lte, gt/gte)

  - content id (equality, content_in_list)

  - created datetime (range)

As an authenticated user, I can delete any repository version. \[[3219](https://pulp.plan.io/issues/3219)\]

  - Latest versions are deleted simply.

  - Content set changes are "squashed" into the following version when non-latest versions are deleted.

As an authenticated user, I can view content that was added or removed in a particular repository version (as compared to the previous version). \[done\]

As an authenticated user, I can see the number of content unit types with counts for each \[done\]\[[3059](https://pulp.plan.io/issues/3059)\]

#### Repository Version Content

As a user, I know content sets for repository versions are immutable. \[done\]

As an authenticated user, I can list the content in a particular repository version \[done\]

  - All fields are included

  - Pagination is supported

As an authenticated user, I can create a new version by adding or removing content to the latest version. \[[3234](https://pulp.plan.io/issues/3234)\]

  - I can follow the progress. (adding/removing are asynchronous).

  - can add and remove together in a single call

## Orphan Content Units and Artifacts

As an authenticated user, I can cause an action that cleans up **both** orphaned content units and orphaned artifacts.

  - I cannot specify the units specifically (all types).

  - I can follow the progress of all cleanups. (Cleanups are asynchronous.)

## Task Management

As an authenticated user, I can list all tasks

  - This does not include associated progress reports

As an authenticated user, I can see a detail view for a specific task \[done\]

  - all attributes of a task

  - all associated progress reports

As an authenticated user, I can cancel a task \[done\]

  - don't dare to use the DELETE verb!

As an authenticated user, I can delete tasks.

As an authenticated user, I can filter tasks by: \[[3144](https://pulp.plan.io/issues/3144)\]

  - state (equality, state_in_list)

  - started_at(started_in_range)

  - finished_at(finished_in_range)

  - worker (equality)

  - parent (equality)

## Status

As an unauthenticated user I can view the status of Pulp workers and resource managers. \[done\]

As an unauthenticated user I can view the status of the web server's connection to the database and message broker. \[done\]

As an unauthenticated user I can view the versions of core and each installed plugin.

## Workers

As an authenticated user, I can filter workers by: \[[3143](https://pulp.plan.io/issues/3143)\]

  - last_heartbeat (range)

  - name (substring)

  - gracefully_stopped (equality)

## Plugin User Content Management stories

#### Simple Copy

As an authenticated user of a plugin, I can search (synchronous call) a repository version's content using filtering.

  - note: In a separate call (async), I can add_content_units or remove_content_units to another repository's latest version.

#### Complex Copy

As a plugin writer I can provide a rich search features with arbitrary viewsets. e.g. depsolving, versioning, etc

Examples of specific plugin use cases motivating the above general viewset

  - As an authenticated user, I can add an Errata from one repository to another repository along with packages mentioned in the Errata and all their dependencies that are present in the source repository.

  - As an authenticated user, I can add bunch of dependencies and store n versions back for each RPM.

  - As an authenticated user, I can use depsolving and versioning copy features together

  - As an authenticated user, I can copy a puppet module and all of it's dependencies from one repository to another. 

  - As an authenticated user, I can depsolve units to be added to a destination repo based on an errata

## Plugin API

As a plugin writer, I have a plugin API that is semantically versioned at 0.x separate from the REST API \[done\]

As a plugin writer, my app will be discovered by Pulp's app via an entry point provided by the plugin writer \[done\]

#### Task

As a plugin writer, I can report progress with a message and state \[done\]

As a plugin writer, I can report progress with an optional suffix \[done\]

As a plugin writer, I can report progress with a total count of things to do an the current count of things done \[done\]

As a plugin writer, non-fatal exceptions on the Task and are included in the Task detail. non_fatal exceptions do not cause the Task to be marked as failed, but may be interpreted by the user as not fully successful. \[done\]

As a plugin writer, the working directory is set before Task work is done and cleaned up afterwards. I should not need to interact with the file system outside of the working dir. \[done\]

#### Remote

As a plugin writer, I can provide a subclassed Remote. I can add custom fields to the subclassed Remote.

As a plugin writer, I can provide a UserFacingTask to perform a sync operation using information stored in a Remote.

As a plugin writer, I can provide a ViewSet for the subclassed Remote that has a 'sync' endpoint that dispatches the sync task with a reservation for Repository and Remote.

#### Publisher

As a plugin writer, I can provide a subclassed Publisher. I can add custom fields to the subclassed Publisher.

As a plugin writer, I can provide a UserFacingTask to perform a publish operation using information from the subclassed Publisher.

As a plugin writer, I can provide a ViewSet for the subclassed Publisher that has a 'publish' endpoint that dispatches the publish task with a reservation for Repository and Publisher.

#### Content

As a plugin writer, I can provide a subclassed Content unit. I can add custom fields to the subclassed Content. \[done\]

<span style="color:red;">As a plugin writer, I have documentation that shows how I can add filters to filter content responsibly.</span>

<span style="color:red;">As a plugin writer, I have documentation on how to write a filter for my Content that can use the RepositoryVersion manager.</span>  

<span style="color:red;">\* note: This will allow users to filter content by repository version</span>

#### Content Management

As a plugin writer, I can interact with and create Artifacts \[done\]

As a plugin writer, I can query content units/artifacts associated with a repository. \[done\]

As a plugin writer, I can create a new repository version: \[done\]

  - When I create the new version, it is incomplete.

  - The new version starts with all the content from the previous version.

  - I can add and remove content units to and from an incomplete repository version. 

  - When I am finished with the incomplete version, core finalizes the repository version for me. 

  - I have exclusive access to the new repository version while my code is running.

#### Publishing

As a plugin writer, I can create a new publication: \[done\]

  - When I create the new publication, it is incomplete.

  - When I am finished with the incomplete publication, core finalizes the publication for me. 

  - I have exclusive access to the repository version while my code is running.

  - I have exclusive access to the new publication while my code is running.

#### "live APIs"

As a plugin writer, I can register views and viewsets to arbitrary endpoints. \[3360\]  

As a plugin writer, I have documentation on what URLs I should not use for my views and viewsets \[3473\]

Here are some concrete use cases driving the very Live API use cases above:

~~~

# Concrete user use cases:

    As an authenticated user, I can use the puppet client to fetch content from Pulp using the Forge API

    As an authenticated user I can use the docker client to fetch content from Pulp using the Docker v1 API

    As an authenticated user I can use the docker client to fetch content from Pulp using the Docker v2 API

# Concrete plugin writer use cases

    As a puppet plugin developer, I can provide a viewset which handles the server side of the puppet Forge v3 API

    As a docker plugin developer, I can provide a viewset which handles the server side of the docker v1 API

    As a docker plugin developer, I can provide a viewset which handles the server side of the docker v2 API

~~~

h4. Storage

As a plugin writer, the plugin API provides an API that returns a fully qualified path to a shared and namespaced storage location used to store content. \["3182"https://pulp.plan.io/issues/3182\]  

\*****\*****\*\*\*\*

## Webserver Deployment

As a system administrator, I can deploy all Pulp web applications on one process  

As a system administrator, I can deploy the Pulp REST API exclusively in one process  

As a system administrator, I can deploy the Pulp content serving view exclusively in one process

As a system administrator, I can deploy all Pulp web applications inside a virtualenv.  

As a system administrator, I can deploy all Pulp web applications without root permissions.

## CLI

We will use coreapi-cli to generate a one to one mapping of cli commands to rest api schema #3068  

<span style="color:red;">We will have a wrapper for coreapi-cli. This wrapper will handle parallel progress reporting</span>

## Download API

As a plugin writer, I can download files via

  - http://

  - https://

  - file://

As a plugin writer, I can configure a downloader with:

  - Basic Auth

  - SSL Cert Client Auth

  - Custom CAs will be configured via a "trust store" either on the system or similar. Pulp will not do anything to read/load/manage CAs directly.

As a plugin writer, I can provide arbitrary behaviors for customized downloaders

  - For example token authentication in the docker plugin

As a plugin writer, I can have connection pooling/reuse

As a plugin writer, I have proxy settings

  - proxy url (containing basic auth info)

<span style="color:red;">As a plugin writer, I can have great logs</span>

<span style="color:red;">As an authenticated user, I have documentation about how to use something for bandwidth limiting</span>

As a plugin writer, I can configure the validation mechanisms used at download time

  - checksum validation - minimum (md5, sha1, sha256, sha512)

  - size validation

<span style="color:red;">As a plugin writer I can manage the catalog by using ChangeSets</span>

<span style="color:red;">As a plugin writer, the plugin can participate in adding content for cases where the decision to add additional content is based on the content that has been downloaded.</span>

As a plugin writer, I can fetch content myself (but I am not encouraged to do so) with code I write

<span style="color:red;">As a plugin writer, I can CRUD content units</span> need a convention to handle multiple content units - see https://pulp.plan.io/issues/3472

## Migrations only involving Pulp 3

Users can run "pulp-manager migrate" to migrate the database and adjust state in other locations (filesystem, message broker, ...). \[done\]

## Web Server Integration

As a user, I can have content efficiently served to me by Apache by Pulp using the X-SEND response headers. \[done\]  

As a user, I can have content efficiently served to me by Nginx by Pulp using the X-Accel-Redirect response headers. \[done\]

## Glossary

Add (Content Unit): An operation causing a new repository version to contain a content unit(s)

Applicability - A plugin defined term meaning when a package update available in a repository is applicable to a given consumer as determined by the Consumer Profile.

Artifact - A file associated with one content (unit). Artifacts are not shared between content (units). Create a content unit using an uploaded file ID as the source for its metadata. Create Artifacts associated with the content unit using an uploaded file ID for each; commit as a single transaction.

Content (unit) - A single piece of content manged by Pulp. Each file associated with a content (unit) is called an Artifact. Each content (unit) may have zero or many Artifacts.

Distribution: Where and how the content app serves a Publication. i.e. http vs https and base path component of the URL. A Distribution defines:

  - the base path of the repository publication (required)

  - serving via http (default=False)

  - serving via https (default=True)

  - relationship w/ a Publisher for auto-distribution (should be allowed to be NULL)

  - relationship with Publication (should be allowed to be NULL)

Exporter: An Exporter exports a Publication out of Pulp. e.g. rsync exporter exports content to a remote server

Live API: a viewset endpoint contributed by plugin. For examples see the [associated MVP section](https://pulp.plan.io/projects/pulp/wiki/Pulp_3\_Minimum_Viable_Product#Plugin-Writer-live-APIs)

Orphan Artifact: An Artifact that is associated with 0 Content Units and 0 Publications

Orphan Content (unit): A content unit that is a member of 0 repository versions

Remove (content unit): An operation causing a new repository version to not contain a content unit(s)

Repository - A named collection of repository versions.

Repository Version - An immutable set of content which is versioned by a sequential number.