Deploying Perl with Fabric and Carton

Lightning talk on Fabric and Carton

Transcript

1. Deploying Perl with Fabric and Carton Anthony Johnson <aj@ohess.org>
2. Deployment Steps Copy files to destination Install application dependencies Restart services, and post-install cleanup
3. Deploying Files Check files out from VCS For git snapshot `git checkout-index` Rsync files with Fabric
4. Fabric Python SSH wrapper framework Exposes script functions as commands Handles file and shell operations, rsync Parallelized execution
5. @task def deploy(): cmd = 'git checkout-index -f -a --prefix=/tmp/foobar' with lcd('/path/project'): local(cmd) rsync_project('/path/site', '/tmp/foobar') with localenv(): with cd('/path/site'): run('carton install') @task def bootstrap(): run('cpanm -L /path/env App::local::lib::helper') run('cpanm -L /path/env Carton') @contextmanager def localenv(): with settings(shell='/path/env/bin/localenv /bin/sh -c'): yield (horrible, incomplete example)
6. fab -H server bootstrap deploy
7. App::local::lib::helper Alters shell environment, points to local::lib Fabric uses helper as shell to execute
8. Carton Wraps cpanminus Per-application environments Reproducible environments Module version locking - pip, bundler Single JSON file of dependencies
9. carton install carton install --deployment Installs modules from Makefile.PL/Build.PL Installs modules from carton.lock
10. carton bundle carton install --cached Download and cache modules Install cached modules