After running your program, it is helpful to check status of your program, i.e. instance, and check logs. Roadie provides two commands:
Status command roadie status shows your instances are running or have ended.
If your instance has already ended and you also deleted all result data
from the instance, such instance name will be omitted to print.
To print all instance status including such deleted instances, use --all flag.
However, status of old instances will be deleted after a certain period of time.
The another property of status command is to kill some instance.
To kill instance INSTANCE, run
$ roadie status kill INSTANCE
If you kill an instance, outputs from the instance might not be stored.
Log command prints log messages from an instance.
To see log messages from instance INSTANCE, run
$ roadie log INSTANCE
The log messages consist of logs about preprocess and post process,
and outputs your programs write in standard err (stderr).
Roadie’s execution model treats outputs written in standard output (stdout)
and stderr in different way.
Outputs written in stdout are uploaded to a bucket as parts of results
from your program.
You can see and download such outputs by roadie result command but
you cannot check them while your instance is running.
On the other hand, outputs written in stderr are not stored in any persistent
disks but treated as prompt logs, which means you can check such logs while
your instance is still running.
Because outputs written in stderr cause of network traffic, it isn’t
recommended to write huge messages there.
Log command has two option flags; --no-timestamp and --follow.
If --no-timestamp flag is set, roadie omits to print time stamps.
If --follow flag is set, roadie will not end and keep waiting new logs coming. To stop it, use control + c.