Dev1 Galaxy Forum / Tomcat problems in Devuan

Re: Tomcat problems in Devuan

dummy@example.com (IdeaFix) — Wed, 30 Apr 2025 14:33:19 +0000

I found here that there is no pam_limits.so in common-session-noninteractive and common-session by design. Apache 2 can be preconfiured via /etc/apache2/envvars and what about tomcat? All manuals are only about systemd.

Now i put ulimit -n 16384 directly in /etc/init.d/tomcat9 and it is working, but what is the right way?

Re: Tomcat problems in Devuan

dummy@example.com (IdeaFix) — Wed, 30 Apr 2025 11:27:51 +0000

i made "nofile = 65535" for tomcat and "nofile = 16384" for root... after restarting tomcat, i see a changes - 1st tomcat process have nofile=16384 (cat /proc/1st_pid/limits) and ither processes has 8192.

nofile for root allows to change 1st tomcat process configuration, but not others. How to change nofile for tomcat, runned by init script?

In systemd i can make something like this:

[Service]
Type=forking
User=tomcat
Group=tomcat
LimitNOFILE = 65535

Is it possible to make the same thing in /etc/defaults/tomcat?

Re: Tomcat problems in Devuan

dummy@example.com (IdeaFix) — Wed, 30 Apr 2025 10:19:31 +0000

I also see no "pam_limits.so"

here:
/etc/pam.d/common-session-noninteractive
/etc/pam.d/common-session

Tomcat problems in Devuan

dummy@example.com (IdeaFix) — Wed, 30 Apr 2025 07:30:46 +0000

Hi. I have some problems with tomcat:

1. It is unclear for me how to change running user. All modern manuals are for systemd. I tried to edit /etc/defaults/tomcat in tomcat7 style, but it is not working fine. I tried to edit /etc/init.d/tomcat9, but... Deviuan is not LFS.

2. It is unclear for me how tomcat security is working now. In systemd based systems I usually need only to put RW paths in unit file. In devuan I tried ro use tomcat9 security switch in /etc/defaults/tomcat and additional configs in policy.d. It is working now, but I found no documentation about it.

3. It is unclear for me how to run tomcat in 80 port on modern devuan. I want to find a silution wothout firewalls anp proxies. Solutions form tomcat7 and systemd based solutions are not working.

3. "Too many open files". Now i see 1024 when run "ulimit -n". I can run "ulimit -n 4096", but i can not store 4096 after reboot. I tried to add in /etc/security/limits.conf something like this

* soft nofile 2048
* hard nofile 2048

But i see 1024 after reboot. I need to change this option only for "tomcat" process or "tomcat" user. All manuals are about how to edit systemd unit to make another limit value.