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>
This commit is contained in:
Lucas Roesler
2020-03-01 22:09:38 +01:00
committed by Alex Ellis
parent 667d74aaf7
commit 22882e2643
14 changed files with 497 additions and 25 deletions

6
pkg/contants.go Normal file
View File

@ -0,0 +1,6 @@
package pkg
const (
// FunctionNamespace is the default containerd namespace functions are created
FunctionNamespace = "openfaas-fn"
)