Limit size of logs to 1GB by default (10 files × 100 MB), add ability to configure logging drivers. Fixes #762

[artpolikarpov]

Now logs can not fill the entire disc, see initial issue. Limits are configurable. As bonus we’re now able even to change logging driver to syslog, fluentd, or whatever.

I have not updated readme, because not sure in my English. I’ll write about the new features here. I hope someone else will complement the readme on this basis.

Now possible to configure logging drivers via log object in mup.json.

Rotating logs

To set limits of logs to 5 files 200 MB each:

"log": {
  "max-size": "200m",
  "max-file": 5
}

If you want single 1 GB file:

"log": {
  "max-size": "1g",
  "max-file": 1
}

Send logs to third-party

Let’s send our logs to Logentries:

"log": {
  "driver": "syslog",
  "syslog-address": "tcp://data.logentries.com:10123"
}

Note! Accesing logs via mupx logs command works only with default driver which is json-file.

Options reference

All of the possible drivers and options can be found here: https://docs.docker.com/v1.8/reference/logging/overview/

Compatibility

This works via --log-driver and --log-opt flags, which appeared in Docker v1.8. So deploy process can fail if you use an older Docker.