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03b4e02c0f
[misc] cleanup some more references following the removal of sqlite GitOrigin-RevId: db5db9c0e2ba2557b11d64f65fdb5db1dcd2ec74
177 lines
7.4 KiB
Markdown
177 lines
7.4 KiB
Markdown
overleaf/clsi
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===============
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A web api for compiling LaTeX documents in the cloud
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The Common LaTeX Service Interface (CLSI) provides a RESTful interface to traditional LaTeX tools (or, more generally, any command line tool for composing marked-up documents into a display format such as PDF or HTML). The CLSI listens on the following ports by default:
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* TCP/3013 - the RESTful interface
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* TCP/3048 - reports load information
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* TCP/3049 - HTTP interface to control the CLSI service
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These defaults can be modified in `config/settings.defaults.js`.
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The provided `Dockerfile` builds a Docker image which has the Docker command line tools installed. The configuration in `docker-compose-config.yml` mounts the Docker socket, in order that the CLSI container can talk to the Docker host it is running in. This allows it to spin up `sibling containers` running an image with a TeX distribution installed to perform the actual compiles.
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The CLSI can be configured through the following environment variables:
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* `ALLOWED_COMPILE_GROUPS` - Space separated list of allowed compile groups
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* `ALLOWED_IMAGES` - Space separated list of allowed Docker TeX Live images
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* `CATCH_ERRORS` - Set to `true` to log uncaught exceptions
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* `COMPILE_GROUP_DOCKER_CONFIGS` - JSON string of Docker configs for compile groups
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* `COMPILES_HOST_DIR` - Working directory for LaTeX compiles
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* `COMPILE_SIZE_LIMIT` - Sets the body-parser [limit](https://github.com/expressjs/body-parser#limit)
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* `DOCKER_RUNNER` - Set to true to use sibling containers
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* `DOCKER_RUNTIME` -
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* `FILESTORE_DOMAIN_OVERRIDE` - The url for the filestore service e.g.`http://$FILESTORE_HOST:3009`
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* `FILESTORE_PARALLEL_FILE_DOWNLOADS` - Number of parallel file downloads
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* `FILESTORE_PARALLEL_SQL_QUERY_LIMIT` - Number of parallel SQL queries
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* `LISTEN_ADDRESS` - The address for the RESTful service to listen on. Set to `0.0.0.0` to listen on all network interfaces
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* `PROCESS_LIFE_SPAN_LIMIT_MS` - Process life span limit in milliseconds
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* `SENTRY_DSN` - Sentry [Data Source Name](https://docs.sentry.io/product/sentry-basics/dsn-explainer/)
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* `SMOKE_TEST` - Whether to run smoke tests
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* `TEXLIVE_IMAGE` - The TeX Live Docker image to use for sibling containers, e.g. `gcr.io/overleaf-ops/texlive-full:2017.1`
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* `TEX_LIVE_IMAGE_NAME_OVERRIDE` - The name of the registry for the Docker image e.g. `gcr.io/overleaf-ops`
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* `TEXLIVE_IMAGE_USER` - When using sibling containers, the user to run as in the TeX Live image. Defaults to `tex`
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* `TEXLIVE_OPENOUT_ANY` - Sets the `openout_any` environment variable for TeX Live (see the `\openout` primitive [documentation](http://tug.org/texinfohtml/web2c.html#tex-invocation))
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Further environment variables configure the [metrics module](https://github.com/overleaf/metrics-module)
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Installation
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------------
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The CLSI can be installed and set up as part of the entire [Overleaf stack](https://github.com/overleaf/overleaf) (complete with front end editor and document storage), or it can be run as a standalone service. To run is as a standalone service, first checkout this repository:
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$ git clone git@github.com:overleaf/clsi.git
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Then build the Docker image:
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$ docker build . -t overleaf/clsi
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Then pull the TeX Live image:
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$ docker pull texlive/texlive
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Then start the Docker container:
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$ docker run --rm \
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-p 127.0.0.1:3013:3013 \
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-e LISTEN_ADDRESS=0.0.0.0 \
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-e DOCKER_RUNNER=true \
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-e TEXLIVE_IMAGE=texlive/texlive \
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-e TEXLIVE_IMAGE_USER=root \
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-e COMPILES_HOST_DIR="$PWD/compiles" \
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-v "$PWD/compiles:/app/compiles" \
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-v "$PWD/cache:/app/cache" \
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-v /var/run/docker.sock:/var/run/docker.sock \
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--name clsi \
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overleaf/clsi
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Note: if you're running the CLSI in macOS you may need to use `-v /var/run/docker.sock.raw:/var/run/docker.sock` instead.
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The CLSI should then be running at <http://localhost:3013>
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Important note for Linux users
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==============================
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The Node application runs as user `node` in the CLSI, which has uid `1000`. As a consequence of this, the `compiles` folder gets created on your host with `uid` and `gid` set to `1000`.
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```
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ls -lnd compiles
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drwxr-xr-x 2 1000 1000 4096 Mar 19 12:41 compiles
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```
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If there is a user/group on your host which also happens to have `uid` / `gid` `1000` then that user/group will have ownership of the compiles folder on your host.
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LaTeX runs in the sibling containers as the user specified in the `TEXLIVE_IMAGE_USER` environment variable. In the example above this is set to `root`, which has uid `0`. This creates a problem with the above permissions, as the root user does not have permission to write to subfolders of `compiles`.
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A quick fix is to give the `root` group ownership and read write permissions to `compiles`, with `setgid` set so that new subfolders also inherit this ownership:
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```
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sudo chown -R 1000:root compiles
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sudo chmod -R g+w compiles
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sudo chmod g+s compiles
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```
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Another solution is to create a `sharelatex` group and add both `root` and the user with `uid` `1000` to it. If the host does not have a user with that `uid`, you will need to create one first.
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```
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sudo useradd --uid 1000 host-node-user # If required
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sudo groupadd sharelatex
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sudo usermod -a -G sharelatex root
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sudo usermod -a -G sharelatex $(id -nu 1000)
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sudo chown -R 1000:sharelatex compiles
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sudo chmod -R g+w compiles
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sudo chmod g+s compiles
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```
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This is a facet of the way docker works on Linux. See this [upstream issue](https://github.com/moby/moby/issues/7198)
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API
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---
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The CLSI is based on a JSON API.
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#### Example Request
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(Note that valid JSON should not contain any comments like the example below).
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POST /project/<project-id>/compile
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```json5
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{
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"compile": {
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"options": {
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// Which compiler to use. Can be latex, pdflatex, xelatex or lualatex
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"compiler": "lualatex",
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// How many seconds to wait before killing the process. Default is 60.
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"timeout": 40
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},
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// The main file to run LaTeX on
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"rootResourcePath": "main.tex",
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// An array of files to include in the compilation. May have either the content
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// passed directly, or a URL where it can be downloaded.
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"resources": [
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{
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"path": "main.tex",
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"content": "\\documentclass{article}\n\\begin{document}\nHello World\n\\end{document}"
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}
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// ,{
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// "path": "image.png",
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// "url": "www.example.com/image.png",
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// "modified": 123456789 // Unix time since epoch
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// }
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]
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}
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}
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```
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With `curl`, if you place the above JSON in a file called `data.json`, the request would look like this:
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``` shell
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$ curl -X POST -H 'Content-Type: application/json' -d @data.json http://localhost:3013/project/<id>/compile
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```
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You can specify any project-id in the URL, and the files and LaTeX environment will be persisted between requests.
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URLs will be downloaded and cached until provided with a more recent modified date.
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#### Example Response
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```json
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{
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"compile": {
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"status": "success",
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"outputFiles": [{
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"type": "pdf",
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"url": "http://localhost:3013/project/<project-id>/output/output.pdf"
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}, {
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"type": "log",
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"url": "http://localhost:3013/project/<project-id>/output/output.log"
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}]
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}
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}
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```
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License
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-------
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The code in this repository is released under the GNU AFFERO GENERAL PUBLIC LICENSE, version 3. A copy can be found in the `LICENSE` file.
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Copyright (c) Overleaf, 2014-2021.
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