that opens an interesting question - how can you reliably determine the INIT system But I'll let stackoverflow do that.
Sticking to what I know from doing "stat /proc/1/exe", I get /sbin/init. Running /sbin/init --version, it tels me I'm on upstart 1.12.1.
All fine, except there is no /var/log/upstart directory. And at the same time, it looks like tyk is indeed logging under /var/log/tyk-gateway.stderr , and this gets me a little confused. Has the installer failed to detect upstart? Or what else could be wrong?
 Also, the logs contain quite a lot of errors such as:
panic: runtime error: invalid memory address or nil pointer dereference
[signal 0xb code=0x1 addr=0x0 pc=0x66ee25]
goroutine 13 [running]:
net/http.(*Server).Serve(0xc820198880, 0x0, 0x0, 0x0, 0x0)
net/http.Serve(0x0, 0x0, 0x0, 0x0, 0x0, 0x0)
created by main.main
Any idea what this is?