Lucas Roesler 22882e2643 Initial journald log provider attempt ...

**What**
- journald log provider using exec to journalctl
```
journalctl -t <namespace>:<name>  --output=json --since=<timestamp> <--follow> --output-fields=SYSLOG_IDENTIFIER,MESSAGE,_PID,_SOURCE_REALTIME_TIMESTAMP
```
- This can be tested manually using `faas-cli logs` as normal, e.g.
  `faas-cli logs nodeinfo` should tail the last 5 mins of logs.
- Very basic tests ensuring that the `journalctl` comamand is correctly
  construction and that the json log entrys are parsed correctly.
- Add simple e2e test to grep the function logs

Signed-off-by: Lucas Roesler <roesler.lucas@gmail.com>

2020-03-07 10:11:09 +00:00

..

github.com

Initial journald log provider attempt

2020-03-07 10:11:09 +00:00

go.opencensus.io

Initial

2019-12-20 12:56:19 +00:00

golang.org/x

Initial

2019-12-20 12:56:19 +00:00

google.golang.org

Initial

2019-12-20 12:56:19 +00:00