The issue happened with command “sudo apt install open-iscsi”.
After installation failure, iSCSI Initiator Configuration:
node.startup = manually (to automatic) will not make this work.
so any following command “iscsiadm”, “iscsi_discovery”… all failed.
even disable iscsi daemon service, iscsi initiator still cannot work.
Btw, iscsi target — initiator work well on my home IPSAN network(ubuntu 16.04 intel x86 ).
Not found installation failure with installing open-iscsi, of course I use “iscsiadm” do configuration as initiator.