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ARCH

Archives Research Compute Hub

Scala version Scalatra version License: AGPL v3

About

ARCH is a job server for distributed compute analysis of WARC file collections.

Run ARCH using Docker

If you'd like to interact with ARCH via its web-based client, head on over to the Keystone project. Otherwise, follow the steps below to get started using ARCH directly via its API.

Prerequisites

  • For building and running the Docker image
  • For interacting with the ARCH API
    • curl (or any flexible HTTP client)

Build the Docker image

make build-docker-image

The build-docker-image Make target executes docker build while ensuring that:

  • A config file (config/config.json) is initialized via the Docker config template (config/docker.json)
  • The arch user created within the Docker image has the same UID (user ID) as your local user to ensure that any files created within container in a mounted volume will be owned and accessible by your local user

The built image will include a sample collection comprising the WARC file located at: https://archive.org/details/sample-warc-file and indicated by the identifier SPECIAL-test-collection. See Workflow Example for an example job run against this collection.

Run the Docker image

make run-docker-image

The run-docker-image Make target executes docker run while ensuring that:

  • The shared directory has been created (see The "shared" directory)
  • The shared directory is mounted as a volume within the running container
  • ARCH's container server port (12341) is forwarded to localhost

ARCH is ready to receive API requests when you see the following line displayed in the console output:

[info] running (fork) org.archive.webservices.ars.Arch

Run the Docker image in development mode

make run-docker-image-dev

This execution mode is similar to run-docker-image but also mounts your local source code directory into the container which will result in the container running ARCH from the source on your local machine, including any modifications that you may have made.

For the same functionality as above, but with a bash session instead of automatically running ARCH, use make docker-shell. To then run ARCH, in /opt/arch execute sbt dev/run.

API Spec

See: API.adoc

The API spec document was generated by converting the ARCH /api-docs Swagger v1.2 response to Swagger v2.0 using api-spec-converter and then to AsciiDoc using Swagger2Markup:

arch_api_docs_url=http://localhost:12341/api-docs
curl --silent $arch_api_docs_url > apis.json
sed -i 's|}$|, "basePath": "'$arch_api_docs_url'"}|g' apis.json
npx api-spec-converter -f swagger_1 -t swagger_2 apis.json --syntax yaml > swagger.yaml
printf 'swagger2markup.markupLanguage=ASCIIDOC\nswagger2markup.outputLanguage=EN\nswagger2markup.pathsGroupedBy=TAGS\n' > config.properties
docker run --rm -v $(pwd):/opt swagger2markup/swagger2markup convert -i /opt/swagger.yaml -f /opt/swagger -c /opt/config.properties
sed -i '1s/= localhost:12341/= ARCH API\n:toc: left\n:toclevels: 3/' swagger.adoc

Note that though Swagger2Markup supports *OrderBy=AS_IS configuration options, api-spec-converter does not support as-is ordering of properties, etc.

Workflow Example

This section provides an example of running a Domain frequency job on the sample collection that's included in the Docker image.

See the Analyze your WARCs for details on how to create your own input collections.

We're using curl here to interact with the ARCH API, but any flexible HTTP client will work. For a graphical client, you could download a standalone version of Postman (note that the web-based version won't work because it can't access your local network).

List the available ARCH jobs

Note that we're using the credentials of a default admin user that's defined in data/arch-users.json (see API Authentication)

curl -H "X-API-USER: ks:system" -H "X-API-KEY: supersecret" http://localhost:12341/api/available-jobs

Example response:

[
  ...
  {
    "categoryName" : "Collection",
    "categoryDescription" : "Discover domain-related patterns and high level information about the documents in a web archive.",
    "jobs" : [
      {
        "uuid" : "01894bc7-ff6a-7e25-a5b5-4570425a8ab7",
        "name" : "Domain frequency",
        "description" : "The number of unique documents collected from each domain in the collection. Output: one CSV file with columns for domain and count.",
        "publishable" : true,
        "internal" : false,
        "codeUrl" : "https://github.com/internetarchive/arch/blob/main/src/main/scala/org/archive/webservices/ars/processing/jobs/DomainFrequencyExtraction.scala",
        "infoUrl" : "https://arch-webservices.zendesk.com/hc/en-us/articles/14410734896148-ARCH-Collection-datasets#domain-frequency"
      },
      ...
    ]
  },
  ...
]

Run a "Domain frequency" job on the default test collection

curl \
  -XPOST \
  -H "X-API-USER: ks:system" \
  -H "X-API-KEY: supersecret" \
  -H "Content-Type: application/json" \
  --data '{"inputSpec": {"type": "collection", "collectionId": "SPECIAL-test-collection"}}' \
  http://localhost:12341/api/runjob/01894bc7-ff6a-7e25-a5b5-4570425a8ab7

Example response:

{
  "id" : "DomainFrequencyExtraction",
  "uuid" : "01912459-6b9a-70f9-be03-203fb1409900",
  "name" : "Domain frequency",
  "sample" : -1,
  "state" : "Running",
  "started" : true,
  "finished" : false,
  "failed" : false,
  "activeStage" : "Processing",
  "activeState" : "Running",
  "startTime" : "2024-08-05T20:57:30.148Z"
}

Note that the reported UUID of this example job run is 01912459-6b9a-70f9-be03-203fb1409900, which we'll need to specify in our follow-up requests.

Monitor the job's progress

Check the progress of the job by querying the /api/job/{UUID}/state endpoint:

curl \
  -H "X-API-USER: ks:system" \
  -H "X-API-KEY: supersecret" \
  http://localhost:12341/api/job/01912459-6b9a-70f9-be03-203fb1409900/state

Example response: See response format in Run a "Domain frequency" job on the default test collection above

The job is done when the reported state is Finished.

List the job's output files

List the job's output files by querying the /api/job/{UUID}/files endpoint:

curl \
  -H "X-API-USER: ks:system" \
  -H "X-API-KEY: supersecret" \
  http://localhost:12341/api/job/01912459-6b9a-70f9-be03-203fb1409900/files

Example response:

[
  {
    "filename" : "domain-frequency.csv.gz",
    "sizeBytes" : 131,
    "mimeType" : "application/gzip",
    "lineCount" : 3,
    "fileType" : "csv",
    "creationTime" : "2024-08-05T21:02:13.588Z",
    "md5Checksum" : "51e13b611a6fe2219faf9cc6da0be29c",
    "accessToken" : "F36HEDX3IMAVPUFU4AOYYKPPS2TNUMQE"
  }
]

Download a job output file

Download a job output file using the endpoint /api/job/{UUID}/download/{FILENAME}:

curl \
  -H "X-API-USER: ks:system" \
  -H "X-API-KEY: supersecret" \
  http://localhost:12341/api/job/01912459-6b9a-70f9-be03-203fb1409900/download/domain-frequency.csv.gz \
  -o domain-frequency.csv.gz

View the output file contents using zcat:

zcat domain-frequency.csv.gz

Output:

domain, count
wordpress.com,14
wp.com,2
gmpg.org,1

The "shared" directory

The run-docker-image Make target will create a local shared subdirectory that, along with the local ARCH source code directory itself, will be mounted within the running container to serve as the storage destination for ARCH outputs, and as a place to add your own custom collections of WARCs for analysis.

The shared directory has the structure:

shared/
├── in
│   └── collections
├── log
└── out
    ├── custom-collections
    └── datasets

These subdirectories are utilized as follows:

  • log
    • ARCH job logs
  • out/custom-collections
    • ARCH Custom Collection output files
  • out/datasets
    • ARCH Dataset output files
  • in/collections

Analyze Your WARCs

For each group of WARCs that you'd like to analyze as a collection:

  1. Create a new subdirectory within shared/in/collections with a descriptive kebab-case style name like my-test-collection and copy your *.warc.gz into it, e.g.
shared/
└── in
    └── collections
        └── my-test-collection
            └── ARCHIVEIT-22994-CRAWL_SELECTED_SEEDS-JOB1965703-SEED3267421-h3.warc.gz

  1. Start (or restart) the ARCH container to automatically make this collection avaiable to the default ks:system user. The /entrypoint.sh script in the Docker image looks for any newly-added collections on container boot and automatically adds them to data/special-collection.json.

  2. Follow the same procedure for running a job on this collection as is detailed above in Run a "Domain frequency" job on the default test collection, using SPECIAL-{the_name_of_your_collection_directory} (e.g. SPECIAL-my-test-collection) as the collectionId.

API Authentication

ARCH authenticates API requests by inspecting the X-API-USER and X-API-KEY HTTP request headers. These values are checked against the entries in data/arch-users.json, the default of which defines a single ks:system admin user (with plaintext apiKey value of supersecret) and looks like:

{
  "ks:system" : {
    "name" : "Keystone System",
    "admin" : true,
    "apiKey" : "$pbkdf2-sha512$120000$edRi7uf7Dg18ebkFm5lphcfOAiVVCvRB$vyl48k.uOahDCmTKOqViXpw8FG7fKzkVParjfOZ/60U"
  }
}

⚠️ Be sure to delete this default admin user or roll its API key for any application of ARCH beyond local testing! ⚠️

  • An admin-type API key is authorized to make requests on behalf of any user (indicated by X-API-USER)
  • A non-admin-type API key is only allowed to make requests on behalf of its owner

You can create additional users or roll the API key of an existing user by manually invoking the ArchUser.create(name: String, admin: Boolean) and ArchUser.rollApiKey(name: String) methods respectively.

Citing ARCH

How to cite ARCH in your research:

Helge Holzmann, Nick Ruest, Jefferson Bailey, Alex Dempsey, Samantha Fritz, Peggy Lee, and Ian Milligan. 2022. ABCDEF: the 6 key features behind scalable, multi-tenant web archive processing with ARCH: archive, big data, concurrent, distributed, efficient, flexible. In Proceedings of the 22nd ACM/IEEE Joint Conference on Digital Libraries (JCDL '22). Association for Computing Machinery, New York, NY, USA, Article 13, 1–11. https://doi.org/10.1145/3529372.3530916

Your citations help to further the recognition of using open-source tools for scientific inquiry, assists in growing the web archiving community, and acknowledges the efforts of contributors to this project.

License

AGPL v3

Open-source, not open-contribution

Similar to SQLite, ARCH is open source but closed to contributions.

The level of complexity of this project means that even simple changes can break a lot of other moving parts in our production environment. However, community involvement, bug reports and feature requests are warmly accepted.

Acknowledgments

This work is primarily supported by the Andrew W. Mellon Foundation. Other financial and in-kind support comes from the Social Sciences and Humanities Research Council, Compute Canada, York University Libraries, Start Smart Labs, and the Faculty of Arts at the University of Waterloo.

Any opinions, findings, and conclusions or recommendations expressed are those of the researchers and do not necessarily reflect the views of the sponsors.