I’ve been trying to get Rancher to work by following the quick start in the documentation. When I try to start my first container however the Network Agent container fails to start.
It shows the following error message in the UI:
: cbfc4bdd-5d60-4483-b8ee-21974926e2f8 : 500 Server Error: Internal Server Error ("Cannot start container 01c2e78071839e1238ff64000e206e0ad6e7458136eac0f696d4cfca31646aa5: Error starting userland proxy: listen udp 0.0.0.0:4500: bind: address already in use")
If I try to do a
netstat -p to find if another process is using port 4500 I come up empty.
Nevermind, I didn’t use the correct syntax for
netstat. I should’ve used
sudo netstat -nap.
I apparently already had an IPSec service running on my host. Stopping it made the error disappear.