scylla_coredump_setup: fix coredump timeout settings

We currently configure only TimeoutStartSec, but probably it's not
enough to prevent coredump timeout, since TimeoutStartSec is maximum
waiting time for service startup, and there is another directive to
specify maximum service running time (RuntimeMaxSec).

To fix the problem, we should specify RunTimeMaxSec and TimeoutSec (it
configures both TimeoutStartSec and TimeoutStopSec).

Fixes #5430

Closes #12757

(cherry picked from commit bf27fdeaa2)

dist/common/scripts/scylla_coredump_setup

@@ -42,7 +42,8 @@ if __name__ == '__main__':
         if systemd_unit.available('systemd-coredump@.service'):
             dropin = '''
 [Service]
-TimeoutStartSec=infinity
+RuntimeMaxSec=infinity
+TimeoutSec=infinity
 '''[1:-1]
             os.makedirs('/etc/systemd/system/systemd-coredump@.service.d', exist_ok=True)
             with open('/etc/systemd/system/systemd-coredump@.service.d/timeout.conf', 'w') as f:

scylla_post_install.sh

@@ -63,4 +63,15 @@ MemoryLimit=$MEMORY_LIMIT
 EOS
 fi
 
+if [ -e /etc/systemd/system/systemd-coredump@.service.d/timeout.conf ]; then
+    COREDUMP_RUNTIME_MAX=$(grep RuntimeMaxSec /etc/systemd/system/systemd-coredump@.service.d/timeout.conf)
+    if [ -z $COREDUMP_RUNTIME_MAX ]; then
+    cat << EOS > /etc/systemd/system/systemd-coredump@.service.d/timeout.conf
+[Service]
+RuntimeMaxSec=infinity
+TimeoutSec=infinity
+EOS
+    fi
+fi
+
 systemctl --system daemon-reload >/dev/null || true