Run Scylla and supporting services as a custom user:group¶

Topic: Planning and setup By default, Scylla runs as user scylla in group scylla. The following procedure will allow you to use a custom user and group to run Scylla. 1. Create the new user and update file permissions

useradd test
groupadd test
usermod test -G test
chown -R test:test /var/lib/scylla

2. Edit /etc/sysconfig/scylla-server and change the USER and GROUP

USER=test
GROUP=test

3. Edit /etc/systemd/system/multi-user.target.wants/scylla-server.service

User=test

4. Edit /etc/systemd/system/multi-user.target.wants/node-exporter.service

User=test
Group=test

5. Edit /usr/lib/systemd/system/scylla-jmx.service

User=test
Group=test

6. Reload the daemon settings and start Scylla and node_exporter

systemctl daemon-reload
systemctl start scylla-server
systemctl start node-exporter

At this point, all services should be started as test:test user:

test      8760     1 11 14:42 ?        00:00:01 /usr/bin/scylla --log-to-syslog 1 --log-to-std ...
test      8765     1 12 14:42 ?        00:00:01 /opt/scylladb/jmx/symlinks/scylla-jmx -Xmx256m ...
test     13638     1  0 14:30 ?        00:00:00 /usr/bin/node_exporter --collector.interrupts