Agent doesn't start after reboot

[Exonix]

Debian 9.1.0 x64

zabbix_agentd -V
zabbix_agentd (daemon) (Zabbix) 3.4.2
Revision 72885 25 September 2017, compilation time: Sep 25 2017 15:54:03

Copyright (C) 2017 Zabbix SIA
License GPLv2+: GNU GPL version 2 or later <http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it according to
the license. There is NO WARRANTY, to the extent permitted by law.

zabbix_server -V
zabbix_server (Zabbix) 3.4.2
Revision 72885 25 September 2017, compilation time: Sep 25 2017 15:54:03

Copyright (C) 2017 Zabbix SIA
License GPLv2+: GNU GPL version 2 or later <http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it according to
the license. There is NO WARRANTY, to the extent permitted by law.

tail -f -n 75 /var/log/zabbix/zabbix_agentd.log
937:20171016:115951.401 Got signal [signal:15(SIGTERM),sender_pid:2362,sender_uid:0,re ason:0]. Exiting ...
937:20171016:115951.448 Zabbix Agent stopped. Zabbix 3.4.2 (revision 72885).

tail -f -n 75 /var/log/zabbix/zabbix_server.log
689:20171016:120019.877 Zabbix agent item "system.cpu.util[,idle]" on host "Zabbix server" failed: first network error, wait for 15 seconds
690:20171016:120034.898 Zabbix agent item "system.cpu.util[,softirq]" on host "Zabbix server" failed: another network error, wait for 15 seconds
690:20171016:120049.921 Zabbix agent item "system.cpu.util[,system]" on host "Zabbix server" failed: another network error, wait for 15 seconds
690:20171016:120104.947 temporarily disabling Zabbix agent checks on host "Zabbix server": host unavailable

what i have done to configure startup:

update-rc.d zabbix-agent defaults

but it haven't helped. If I start the agent manually - it works:

/etc/init.d/zabbix-agent start
1379:20171016:121335.293 Starting Zabbix Agent [Zabbix server]. Zabbix 3.4.2 (revision 72885).
1379:20171016:121335.293 **** Enabled features ****
1379:20171016:121335.293 IPv6 support: YES
1379:20171016:121335.293 TLS support: YES
1379:20171016:121335.293 **************************
1379:20171016:121335.293 using configuration file: /etc/zabbix/zabbix_agentd.conf
1379:20171016:121335.294 agent #0 started [main process]
1381:20171016:121335.295 agent #2 started[listener #1]
1382:20171016:121335.296 agent #3 started[listener #2]
1383:20171016:121335.296 agent #4 started[listener #3]
1384:20171016:121335.297 agent #5 started [active checks #1]
1380:20171016:121335.301 agent #1 started [collector]

how can I fix it?

thanks!

[Atsushi]

If you are using Debian 9.1.0 (stretch), I think that you are using systemd to start daemons.
Please try configuring it to start automatically using the systemctl command.

ex.

# systemctl enable zabbix-agent

[Exonix]

thanks. It seems to be working.

20810:20171018:103655.191 Got signal [signal:15(SIGTERM),sender_pid:1,sender_uid:0,reason:0]. Exiting ...
 20807:20171018:103655.191 Got signal [signal:15(SIGTERM),sender_pid:149832,sender_uid:0,reason:0]. Exiting ...
 20808:20171018:103655.192 Got signal [signal:15(SIGTERM),sender_pid:1,sender_uid:0,reason:0]. Exiting ...
 20812:20171018:103655.197 Got signal [signal:15(SIGTERM),sender_pid:1,sender_uid:0,reason:0]. Exiting ...
 20811:20171018:103655.199 Got signal [signal:15(SIGTERM),sender_pid:1,sender_uid:0,reason:0]. Exiting ...
 20809:20171018:103655.199 Got signal [signal:15(SIGTERM),sender_pid:1,sender_uid:0,reason:0]. Exiting ...
 20807:20171018:103655.206 Zabbix Agent stopped. Zabbix 3.4.2 (revision 72885).
   520:20171018:103711.636 Starting Zabbix Agent [Zabbix server]. Zabbix 3.4.2 (revision 72885).
   520:20171018:103711.638 **** Enabled features ****
   520:20171018:103711.638 IPv6 support:          YES
   520:20171018:103711.638 TLS support:           YES
   520:20171018:103711.638 **************************
   520:20171018:103711.638 using configuration file: /etc/zabbix/zabbix_agentd.conf
   520:20171018:103711.641 agent #0 started [main process]
   531:20171018:103711.642 agent #1 started [collector]
   532:20171018:103711.642 agent #2 started[listener #1]
   533:20171018:103711.642 agent #3 started[listener #2]
   534:20171018:103711.643 agent #4 started[listener #3]
   535:20171018:103711.643 agent #5 started [active checks #1]