dev/

Spin Cycle Development Sandbox

The run-spincycle script configures and runs a Spin Cycle in a sandbox (all files in a single diretory). This is used for local development (on your laptop); it is not suitable for testing, staging, and certainly not produciton.

Presuming,

1. All Go package dependencies are installed (not described here)
2. The jobs symlink points to the jobs repo you want (default: dev/jobs)
3. MySQL is running on localhost:3306 with root user having no password
4. Have not run the script before
5. The specs symlink points to the specs you want (default: dev/specs)

then running run-spincycle should "Just Work" and "Do the Right Thing", like:

$ ./run-spincycle
MySQL
 mysql: /usr/local/bin/mysql
   net: tcp
  addr: 127.0.0.1
  port: 3306
  user: root
  pass: (empty)
    db: spincycle_dev
Wrote Request Manager config: dev/sandbox/rm-config.yaml
Wrote Job Runner config: dev/sandbox/jr-config.yaml
Wrote my.cnf: dev/sandbox/my.cnf
Testing MySQL connection...
Creating database spincycle_dev...
Database spincycle_dev is ready
Building request manager...
Building job runner...
Building spinc...
Started Request Manager (PID: 14474)
Started Job Runner (PID: 14475)

#
# OK, Spin Cycle is running
#

==> dev/sandbox/rm.log <==
{"time":"2018-01-30T18:44:07-08:00","remote_ip":"127.0.0.1","method":"GET","uri":"/api/v1/request-list","status":200, "latency":179,"latency_human":"179.249µs","rx_bytes":0,"tx_bytes":2}

==> dev/sandbox/jr.log <==

On success, the script keeps running by tailing the Request Manager (RM) and Job Runner (JR) logs. CTRL-C will terminate and clean up.

Run run-spincycle --help for command line options.

dev/ and sandbox/ Files

Do not modify any files in dev/! The files are templates which are copied into dev/sandbox/, and that directory is ignored by git. All files in dev/sandbox/ are safe to delete, and they can be regenrated by running run-spincycle again.

Files in sandbox/ are not recreated if they already exist. To regenerate a config file, remove it from sandbox/ and run the script again. To recompile binaries, either delete them (one or several) or specify --build.

Configuring MySQL

The script parses MySQL connetion values (user, pass, host, port, db) from db.dsn in sandbox/rm-config.yaml and prints them, like:

MySQL
 mysql: /usr/local/bin/mysql
   net: tcp
  addr: 127.0.0.1
  port: 3306
  user: root
  pass: (empty)
    db: spincycle_dev

Those values are the defaults. If not correct, the script will fail to connect or create the database. Edit db.dsn in sandbox/rm-config.yaml as needed and run the script again.

The user needs full privileges on the database.

If the database does not exist, it's created. Or, specify --truncate to drop and create the database.

Troubleshoot

run-spincycle is just a Bash script, no magic. If there's a problem, run with /bin/bash -x and debug. Also good to start clean:

killall request-manager ; killall job-runner
rm -rf dev/sandbox
mysql -e "DROP DATABASE IF EXISTS spincycle_dev"