Last Updated on 2023-02-09

KB00018: Preventing accidental shutdowns

EVA ICS versions: 3.4.2 and 3.x above

Problem

Sometimes EVA ICS processes might be shut down by accident or due to a failure of the OS startup system.

Solution

To prevent such behavior on production mission-critical systems, enable an additional watchdog with system cron daemon (edit /etc/crontab file):

*/1 * * * * root  /opt/eva/sbin/check-start.sh

Note

The feature is available in EVA ICS 3.4.2 and above, starting from the build 2023020903

The above watchdog script does the following:

• checks EVA ICS registry state and restarts it if not available

• checks enabled components and restarts them if they are not running

The watchdog script aborts checks if:

• the system uptime is less than 600 seconds (10 minutes)

• there is another copy of the watchdog script running

Note

To prevent conflicts, the watchdog script must be disabled in the system cron during updates or manual maintenance.