Openhab 2 - correct place to set environment variables

Setup, Configuration and Use Runtime
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1

Hi,

I’m running OH2 on Linux using the apt-get installer.

I’ve amended /usr/share/openhab2/runtime/bin/setenv to change the ports and add symlinks for USB devices; I’ve also amended /etc/init.d/openhab2 to change the default user. However both get overwritten each time I update.

In OH1.8 I fixed this by editing etc/default/openhab, but /etc/default/openhab2 seems to have a different format. If anyone has an example that would be most helpful

thanks,

Dan

2

I set the ports for USB devices in /etc/default/openhab2. Hope this helps.

3

Hi @dan12345, the correct place to set environment variables is indeed /etc/default/openhab, this file gets called before openHAB starts, so you should be free to set variables used by openHAB on a new line. A common configuration is:

EXTRA_JAVA_OPTS="-Dgnu.io.rxtx.SerialPorts=/dev/ttyUSB0:/dev/ttyS0:/dev/ttyAMA0"

Hope that helps!

4

Thank you! Can I include other items, like this:

EXTRA_JAVA_OPTS="-Dgnu.io.rxtx.SerialPorts=/dev/ttyUSB0:/dev/ttyS0:/dev/ttyAMA0"
OPENHAB_HTTP_PORT=8081
OPENHAB_HTTPS_PORT=8444
USER_AND_GROUP="dan:dan"

Dan

5

You should be able to, the start script will only set all of those if they have not been set previously e.g.:

if [ -z "$USER_AND_GROUP" ]; then
        USER_AND_GROUP="openhab:openhab"
fi

and /etc/openhab2/defaults will get called first so the above code shouldn’t run.

6

smashing - than you. I see the variables are slightly different from OH1.8 - i.e. OPENHAB_HTTP_PORT instead of HTTP_PORT

7

That’s correct, whilst i’m not sure on the reasoning it’s probably due to HTTP_PORT being a fairly common thing to set as an environment variable.

8

oddly this works to set the openhab user, and to set the symlinks, but it doesn’t work to change the ports - I have to manually edit /usr/share/openhab2/runtime/bin/setenv . Am I doing something subtly wrong?

9

My best guess is that the test “-z” is failing when 8081 isn’t a string.

Have you expressed the variable as a string? i.e:

OPENHAB_HTTP_PORT="8081"

And does this work?

10

it doesn’t, unfortunately.

11

This is my /etc/default/openhab2 file (I use it to change the ports and it does not get overwritten after a apt-get upgrade):

EXTRA_JAVA_OPTS=""
OPENHAB_HTTP_PORT=8081
OPENHAB_HTTPS_PORT=8444

and it works fine