[syslog-ng] Trouble configuring elasticsearch2 destination

[Fabien Wernli]

On Tue, Jul 03, 2018 at 04:02:32PM +0200, T4iga wrote:
> Hi,
> 
> I think ld.so.conf will not work for me. I think I have multiple Java
> versions installed.
> I tried to read up on how to implement this in a unit file. It seems
> extremely
> complicated to fully understand compared to what I need it for.
> 
> Would creating a file and setting the environment variable there as
> explained in the first answer here suffice?
> https://unix.stackexchange.com/questions/117467/how-to-permanently-set-environmental-variables
> 
> Is this universal amongst distributions using systemd?

I don't see any reference to systemd in the thread you pasted.
Chances are you can use /etc/sysconfig/ or /etc/default.
Just check if you've got the corresponding EnvironmentFile entry in your
systemd unit file. Here's what I have on my system:

    $ systemctl cat syslog-ng
    # /usr/lib/systemd/system/syslog-ng.service
    [Unit]
    Description=System Logger Daemon
    Documentation=man:syslog-ng(8)
    
    [Service]
    Type=notify
    ExecStart=/usr/sbin/syslog-ng -F $SYSLOGNG_OPTS -p /var/run/syslogd.pid
    ExecReload=/bin/kill -HUP $MAINPID
    EnvironmentFile=-/etc/default/syslog-ng
    EnvironmentFile=-/etc/sysconfig/syslog-ng
    StandardOutput=journal
    StandardError=journal
    Restart=on-failure

as you can see, either /etc/default/syslog-ng or /etc/sysconfig/syslog-ng can be used to
add the LD environment variable