this allows gelf logger to collect extra metadata from containers with
`--log-opt labels=label1,label2 --log-opt env=env1,env2`
Additional log field will be prefixed with `_` as per gelf protocol
https://www.graylog.org/resources/gelf/
Signed-off-by: Daniel Dao <dqminh@cloudflare.com>
If an invalid logger address is provided on daemon start it will
silently fail. As syslog driver is doing, this check should be done on
daemon start and prevent it from starting even in other drivers.
This patch also adds integration tests for this behavior.
Signed-off-by: Antonio Murdaca <runcom@linux.com>
- downcase and privatize exported variables that were unused
- make accurate an error message
- added package comments
- remove unused var ReadLogsNotSupported
- enable linter
- some spelling corrections
Signed-off-by: Morgan Bauer <mbauer@us.ibm.com>
