cloudera-hosts.sh

#!/bin/bash

read -p "environment: " env
read -p "user: " user
read -s -p "password: " password

if [ "$env" == "prod" ] ; then
  url=http://manager.hadoop.werally.in:7180/api/v10/hosts
elif [ "$env" == "blue" ] ; then 
  url=http://manager.hadoop-bluesteel.werally.in:7180/api/v10/hosts
elif [ "$env" == "int" ] ; then 
  url=http://manager.hadoop-integration.werally.in:7180/api/v10/hosts
elif [ "$env" == "dev" ] ; then 
  url=http://manager.hadoop-dev.werally.in:7180/api/v10/hosts
else
  echo -e "\nenv must be one of {prod|blue|int|dev}"
  exit 1
fi

curl -u $user:$password $url \
| jq -r --arg env "$env" '.items | map({hostname:.hostname, alias:(.hostname | capture("(?<prefix>[a-z]*)").prefix)}) | sort_by(.hostname) | group_by(.alias) | map(to_entries | map({hostname:.value.hostname, alias:(.value.alias + ((.key+1) | tostring))})) | flatten | .[] | ("Host " + .alias + "-" + $env + "\n" + "  HostName " + .hostname + "\n")'