Mounting certificates/CAs for elasticsearch pods in k8s for custom configurations – ECK

When you deploy elasticsearch in k8s via ECK by default it takes care of the transport certificates/http certificates/CA creation if you don’t use your own custom ones. Lets say that your cluster is up and running and now you are trying to configure something like SAML/LDAP/OIDC or something else that requires content to be made available to the elasticsearch pod but its a bit sensitive so you need it to be stored as a secret such as CA, certificates, etc. How would you go about doing this? Following example will add a custom certificate authority to be used with your… Continue Reading


Fleet server with logstash output – elastic-agent

I think one of the biggest issue with fleet and elastic-agent was that it was limited on the outputs so if you had tons and tons of elastic-agents in the wild it would all connect back to your elasticsearch and can overwhelm the cluster. Starting 8.2 of elasticsearch logstash output type was introduced.. it is still in BETA at this time but I just tried it and it worked very nicely! The steps to setup the logstash output is listed on https://www.elastic.co/guide/en/fleet/8.2/secure-logstash-connections.html but I wanted to try it out and document it. Install & configure logstash Install yum install logstash-8.2.2… Continue Reading


Updated deploy-elastic script – version 8

Last update to version 7 is listed here The original post for the deploy-elastic.sh script is here. Changes: fully tested from 6.x-8.2(will most likely work with future 8.x versions) decoupled non stack modes from checking versions so that you can add the secondary components like monitoring/fleet/apm/enterprise-search using different version than the stack version. Just install the stack first then install the secondary components with different versions. Secondary versions can not be higher than the stack version. This will allow you to test using different versions fleet setting is now auto-populated. The script will gather the machines external IP and set… Continue Reading


Creating a custom CA and certificates with SAN signed by the CA for testing

There are endless guides on the internet that uses endless methods to generate certificates and CA but I have not found one that is simple to use to create a custom CA and CA signed certificate with SAN (Subject Alternative Name) to perform some testing. So I created simple set of steps: Create a ca.key ❯ openssl genrsa -out ca.key 2048 Generating RSA private key, 2048 bit long modulus …………………………………………………………………………….+++ …………….+++ e is 65537 (0x10001) ❯ ls ca.key ❯ cat ca.key —–BEGIN RSA PRIVATE KEY—– MIIEowIBAAKCAQEArTBn8M9NBHmmVKOCcKl75EYZqv2LvNvNQjSJ0YDHLrXt2CpL x3N7IDgriLU4TbFVb13yQCPXESQOOBuzNJMqG8Ca5K56RYNBY6QP5k8z195385Qd QJODgut3A+ACjkWB9iVMHuN+KVXyEcPhl4/UFvYW6+ybvSSmUgfZJ/u3fCh6YaWN 15nVWRI40yDAgvM8EKuPew734ENF1GdSVF+S+m2QhDKR2gn8NkpdvYjKDtKFN2Rh VjREEb3TuQqttZNykkCira93dr3/ILdTGVxOIkXhdESFdiRMZ9dXOUqozQSALGfw cXKY2MlrkN+20F/ojoh3IqZs2gJS05udJOaarQIDAQABAoIBADdnBckmN6gX1lq7 F848mZJzzmBBzcLzuZzVO8VWYeGSd2ywUx+R1LCA54RLHKDV+tOuhQF5taIZG6dd TR2jelP4cFR5cEnubCuY3zE44wfKdiroldcDmY13D9KghZDHsYRxeAFlmwVUJiUC uZcHfrx9quV8AnImWEJjmldNEexYa94tLM+SahbNEG3H6s2hQE+GvshoVp+IoPPg sIVZo7AyEj/Z6sdY67YX92aNHeFr1TvSO/knxAryBW1knui8ZlmpFIroEZ8eR/Cn 1SYIWaJZpzz5pmbKIOWHc2uM7rUJzW3Rm8hFzjOCiUgmmYjQROVvLKFMTtiV6mcl IATnsqECgYEA0pR5fjqdf9NG3C+k8bh/PxKX2MzBmaFMjMdini081l9oN6D1Hjiz Pw3NZ0iVb+pQceeVLss8v/mX/zhkQ0P+rbiz4Lh191few5/uAxhqVJUVbMPjCYMz qxTTK3pcpui4PPM8pfFOBFbuXc4QqUf5HYW6HUq0eWWy86U9cB0W0wUCgYEA0otU r8LlxclOYZkcxqbYe+0/8xxCXaYw5slTbyxlh40wX2vgjmSkeOli8peGfMD07Cfm… Continue Reading


wildcard certificates

How to create wildcard certificate the right way to use for home so that you wouldn’t get the not trusted thingy for your site. Use my script on https://github.com/jlim0930/scripts/blob/master/wildcard.sh to generate the CA,CA key, & the certificate. Use the certificate to encrypt your devices and sites like synology,esxi,others and import the CA into your computer so that it will verify the cert! enjoy!