Add environment variable to check_by_ssh

Icinga 2
1

I need to run something like this LANG=C ls via check_by_ssh and I’m struggling how to define by_ssh_command and/or by_ssh_arguments. Could anyone provide the correct syntax?

2

Hallo @rsx , here are a few examples how to do it right, you can have a look.

I hope this helps you further!

Best,
Yonas

3

Hi, thanks for that blog entry. However, it does not contain any hints regarding additional environment variables.

4

Hi.

You can add the environment variable as prefix to the ssh-command.

Example:

vars.by_ssh_command = "LC_ALL=en_US.utf8 /usr/lib/nagios/plugins/your_script"
# Would set LC_ALL to en_US.utf8

Additional notes:

  1. If you use the LC_ALL, it has to exist on the target system, otherwise it fails
  2. SSH-daemon: On the target system (ssh-Daemon), the environment variable has to be accepted.
    Example:
AcceptEnv LANG LC_* FOO BAR

This would accept environment variables named LANG, FOO and BAR and additionally those starting with LC_

Hope this helps

5 
vars.by_ssh_command = "NLS_LANG=AMERICAN_AMERICA.AL32UTF8 /usr/lib/nagios/plugins/your_script"

result in

Remote command execution failed: sh: NLS_LANG=AMERICAN_AMERICA.AL32UTF8 /usr/lib/nagios/plugins/your_script: No such file or directory

Running the same command directly work as expected:

ssh 192.168.188.153 -C 'NLS_LANG=AMERICAN_AMERICA.AL32UTF8 /usr/lib/nagios/plugins/your_script'
OK

Any other idea?

6

Hi again.

Sorry that it didn’t help.

I tried it with your required environment-variable and it worked:

vars.by_ssh_command = "NLS_LANG=AMERICAN_AMERICA.AL32UTF8 /usr/lib/nagios/plugins/whatever_your_scriptname_is.sh"

My example script outputs all environment-variables, also:
NLS_LANG=AMERICAN_AMERICA.AL32UTF8

Edit:
Maybe you could check what arrives at the target-host.
I captured the executed ssh command and it should look like this:

NLS_LANG=AMERICAN_AMERICA.AL32UTF8 /usr/lib/nagios/plugins/show_env.sh

(But with the correct scriptname and path)

Greetings.