Use puppetmaster to fetch facts (JSON) from all puppet nodes without puppetdb

get_releases.sh

#!/bin/bash

NODES=`sudo puppet cert list --all|awk '{print $2}'` # Get all node names
echo '{"facts": [' > facts_tmp.json
# for node in node: get facts
echo -n $NODES | xargs -d " " -i sh -c 'sudo puppet facts find {} --terminus rest | tr "\n" "," >> facts_tmp.json'
sed -ie 's/,$//' facts_tmp.json # Remove last comma
echo ']}' >> facts_tmp.json

# optionally format and filter json (requires jq)
cat facts_tmp.json | jq -r '.facts[] | { name: .name, osrelease: .values.lsbdistrelease }' > facts_releases.json