The three logs

Ferry has a deploy log, a runtime log and a job log. Each one has its own place.

Where each log is

Log	What it has	Read it
Deploy log	The build output and the deploy steps of one deploy	`ferry logs --deploy ID`
Runtime log	What the containers of the service write to stdout and stderr	`ferry logs NAME`
Job log	The output of one job run	`ferry logs --job ID`

Where a log is, and how long

Log	Place	Kept
Deploy log	`<data-dir>/logs/deploys/<deploy id>.log`	Until you delete the service
Runtime log	In Docker	As long as the containers exist. Docker rotates it at 10 MiB × 3 files for each container (the default).
Job log	`<data-dir>/logs/jobs/<job id>.log`	For the newest 100 runs of each service

Deploy log

09:38:31 ==> Starting 1 instance(s)
09:38:31 [2fa90d] docker-echo listening on :8000

Each line has a timestamp and a stream: stdout, stderr or system. A line of a runtime log also has its instance.

The messages of Ferry are system lines. They start with ==> .