Last Updated on 2021-08-27
KB00012: Running EVA ICS under restricted users
EVA ICS versions: 3.3.2 and above
EVA ICS has built-in mechanism to run components under restricted users, which can be configured with the included “easy-setup” script.
However, sometimes superuser is not available at all and eva-control/”eva server” commands should be run under a restricted user, without decreasing permissions after startup.
Detailed step-by-step guide
stop EVA ICS (“eva server stop”). If EVA ICS is configured to be started with systemd (default), use “systemctl stop eva-ics” instead. If supervisord is used, stop EVA ICS with supervisorctl.
Change EVA ICS directory ownership to the desired user (e.g. “chown eva /opt/eva”)
For systemd, edit /etc/systemd/system/eva-ics.service file and change “User=” variable value to the desired user account. After, execute “systemctl daemon-reload”. If supervisord is used, edit /etc/supervisor/conf.d/eva-* files and change “user” variables as well.
start EVA ICS (“eva server start”) under the restricted user. If EVA ICS is configured to be started with systemd (default), use “systemctl start eva-ics” instead (under root). If supervisord is used, start EVA ICS with supervisorctl. For EVA ICS 3.4.0 and above, do the same for eva-ics-registry service or supervisord program.
The above process can be automated with the script, which is available at
Download the script and run it as root:
#./switch-eva-superuser <user> # e.g. ./switch-eva-superuser eva # if EVA ICS is installed in the director other than default /opt/eva: EVA_DIR=/path/to/eva ./switch-eva-superuser eva
Or run the script directly from the web, e.g. with curl:
curl https://raw.githubusercontent.com/alttch/eva3/3.4.1/install/switch-eva-superuser | sh /dev/stdin eva
Starting EVA ICS during the system startup
To start EVA ICS during the system startup, use either systemd, or the shell command:
su - eva -c "/opt/eva/sbin/registry-control start" su - eva -c "/opt/eva/bin/eva server start"