how to escape %{ in hiera

[Simon]

Hi all

does anyone know how i can escape %{ in hiera without it trying to convert to variable?

i want to add the following to configure a syslog filter for logstash

match => { "message" => "<%{POSINT:syslog_pri}>%{SYSLOGTIMESTAMP:syslog_timestamp} %{SYSLOGHOST:syslog_hostname} %{DATA:syslog_program}(?:\[%{POSINT:syslog_pid}\])?: %{GREEDYDATA:syslog_message}"}

problem is it will try and convert to variables so only shows the following on the server

match => { "message" => "<>  (?:\[\])?: "}

i have tried all the methods i can think of,  any help would be appreciated.

cheers

S

[Christopher Wood]

I ran into this too, use the literal function.

$ grep -rh literal hieradata/
testing::cwood1::param3: "%{literal('%')}{::hostname}"
testing::cwood1::param3: "%{literal('%')}{::hostname}"

https://docs.puppet.com/hiera/3.1/variables.html#the-literal-lookup-function

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[Rob Nelson]

Literal works when there is only one literal percent sign; last I checked, you cannot use it twice in the same value. You can use "%%{::}{::hostname}" to return "%{::hostname}" - the middle "%{::}" returns nothing and splits the first percent from the variable name at the end, preventing interpolation there. 

The use of the two semi colons was to avoid a scoping issue that cropped up as a regression around the puppet 4.3 timeframe that "%%{}{::hostname}" would run into. It is possible this has been fixed by now and the naked semi colons in the braces are optional, but I have not tested this with the latest version of puppet myself. 

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[Simon]

Hi Rob,

That worked perfectly 

thanks!!