I think the problem is the double equality sign in this line of the start script. As far as I know the double equality is not understood by /bin/sh but only by /bin/bash but the start script is executed with /bin/sh by default.
I think a fix would replacing the double equality in this line with a single equality.
When I enable metrics and use nethermind as eth1 client the following error appears as first log line:
I think the problem is the double equality sign in this line of the start script. As far as I know the double equality is not understood by
/bin/sh
but only by/bin/bash
but the start script is executed with/bin/sh
by default.I think a fix would replacing the double equality in this line with a single equality.