open-iscsi binary path
Since open-iscsi-2.1.0-r1 iscsid and iscsiadm are installed into /sbin. Init script still expects them to be in /usr/sbin as before.
$ apk info -L open-iscsi
open-iscsi-2.1.0-r1 contains:
etc/iscsi/iscsid.conf
etc/iscsi/initiatorname.iscsi
etc/iscsi/ifaces/iface.example
sbin/iscsi-iname
sbin/iscsiadm
sbin/iscsi_offload
sbin/iscsiuio
sbin/iscsi-gen-initiatorname
sbin/iscsi_discovery
sbin/iscsistart
sbin/iscsid
sbin/iscsi_fw_login
usr/lib/libopeniscsiusr.so
usr/lib/libopeniscsiusr.so.0
usr/lib/libopeniscsiusr.so.0.2.0
usr/lib/pkgconfig/libopeniscsiusr.pc
usr/include/libopeniscsiusr_session.h
usr/include/libopeniscsiusr_iface.h
usr/include/libopeniscsiusr_common.h
usr/include/libopeniscsiusr.h
$ egrep "command=|ISCSIADM=" /etc/init.d/iscsid
command="/usr/sbin/iscsid"
ISCSIADM=/usr/sbin/iscsiadm