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Build & Install

Ketrew requires at least OCaml 4.03.0 and should be able to build & work on any Unix platform.

From Opam

If you have opam up and running, just install Ketrew while choose a database backend (you may pick both and choose later in the config-file):

opam install [ssl | tls]  ketrew
  • if you want Ketrew to use HTTPS you need to get it linked with OpenSSL (package ssl) or nqsb-TLS (package tls).

This gets you

  • a ketrew executable that can be used to schedule and run workflows,
  • an OCaml library also called ketrew that handles the messy orchestration of those tasks and exports the Ketrew.EDSL module used to write workflows.

Remember that at runtime you'll need ssh in your $PATH if you need to execute commands on distant hosts.

Optional: Ketrew, like any Lwt-based piece of software, will be much faster and scalable when libev is detected and used as a backend. Use opam install conf-libev to tell opam that libev is installed, which you can ensure with

  • brew install libev on MacOSX
  • apt-get install libev-devon Debian/Ubuntu,
  • yum install libev-devel on CentOS (which requires export C_INCLUDE_PATH=/usr/include/libev/ and export LIBRARY_PATH=/usr/lib64/

before opam install conf-libev.

Using Docker

See the instructions at hub.docker.com: hammerlab/ketrew-server.

The project hammerlab/secotrec can also be used to setup Ketrew environments.

Without Opam

See the development documentation to find out how to build Ketrew (and its dependencies) from source.