Engine bay smoke

[judg]

I was driving recently and noticed I had a bit of smoke coming from the engine bay of my VE commodore 2010 series 1. After pulling up the hood I noticed oil around what I'm guessing is a rear coil pack on the left side of the engine.
Coolant temp is fine at 89, engine temperature looks OK, not blowing exhaust smoke. I have attached a picture of what I could see.

Does anyone have any idea as to what this might be?
Thanks

 

[Immortality]

Rocker cover gasket probably needs replacement.

 

[judg]

Yeah thanks I'll have to get it in to the mechanic asap.