Only run the systemd-journal plugin when on a platform that requests it.
The plugin crashes the fluentd process if the journal isn't present, so
it can't just be run blindly in all configurations.
It includes some performance improvements for parsing JSON (which is
very important for us, since all Docker logs are JSON) as well as a
couple new settings, like forcing of a flush of multiline logs after a
time period rather than having to wait until a new log is seen before
feeling confident flushing the previous one.
gunk when installing the google-fluentd agent.
Also let it log things by not redirecting to a file within the container
and only using -q (warning logs only) rather than -qq (error logs only).
This was originally submitted to pick up v0.3.1 of the cloud logging
plugin which had a fix for the name 'metadata' failing to resolve.
Since new releases of google-fluentd have this fix, it is no longer
required.
I've done some additional testing of 'gem update' behavior in the interim
and I think it is ok to use in targeted situations, but we should not be
doing an unconstrained update in general. The issue is that updating a
gem may bring new dependencies, some of those dependencies may include
native code, so it may try to launch a compiler, which isn't desirable
and prone to failure.
If we do need to grab an updated gem in the future we should specify an
explicit version and the --minimal-deps flag.
1. Move fluentd-gcp to be a core cluster addon, rather than a contrib.
2. Get rid of the synthetic logger under contrib, since the exact same
synthetic logger was also included in the logging-demo.
3. Move the logging-demo to examples, since it's effectively an example.
We should also consider adding on a GCP section to the logging-demo
example :)
