Rahul Singhai Blog

Suppose we have a JSON payload (may be a stream coming from Kafka) that looks like this: {"regionName":"asia","nodes":[{"node":"router.dc1.singhaiuklimited.com","weight":"0"},{"node":"router.dc2.singhaiuklimited.com","weight":"100"}]} {"regionName":"asia","nodes":[{"node":"router.dc1.singhaiuklimited.com","weight":"0"},{"node":"router.dc1.singhaiuklimited.com","weight":"0"},{"node":"router.dc2.singhaiuklimited.com","weight":"100"},{"node":"router.dc2.singhaiuklimited.com","weight":"100"}]} To loop through the nested fields and generate extra fields from the calculations while using Logstash, we can do something like this: input { kafka { bootstrap_servers => "kafka.singhaiukl...

Refrences: 1. http://www.cyberciti.biz/tips/howto-linux-unix-bash-shell-setup-prompt.html 2. http://www.cyberciti.biz/faq/bash-shell-change-the-color-of-my-shell-prompt-under-linux-or-unix/ Add following in ~/.profile (or ~/.bash_profile, or ~/.bashrc, or /etc/profile if you have access): export JAVA_VERSION=1.8 export JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk1.8.0_40.jdk/Contents/Home export PATH=$PATH:$JAVA_HOME/bin alias ll='ls -al' # This alias recursively destroys all .DS_Store files in the folder I am currently in alias killDS='find . -name *.DS_Store -type f -delete' # This alias reloads this file alias reload_profile='. ~/.profile' # Mac get stuck very often and are extremely slow and unstable on shutdowns. This forces a shutdown. alias poweroff='sudo /sbin/shutdown -h now' # To ignore space changes while doing git diff alias gitdf='git diff --ignore-space-change' # Show Git branch in prompt parse_git_branch() { git bra...