Working with Prometheus Alert Manager tutorials

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DevOps Training Online – Class Recordings – January 2020

Dear Participants, Here are the consolidated URLs of DevOps training videos/class recordings/tutorials AWS Video Tutorial – January 2020 – (PDF – Notes) Docker Video Tutorial – January 2020 Part –…

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How to install and activate plugins in Moodle?

Moodle is an open source platform which is used for managing your course and it is also called CMS ( Course management system). Here I want to say you about…

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PHP Tutorial for Beginners

What is PHP? It is an open-source general-purpose scripting language that is especially suited for web development. Code executed on the server. It can be embedded in HTML. You should…

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SonarQube Interview Questions and Answer Part – 1

Is it right definition of Sonarqube? SonarQube (formerly Sonar) is a quality management platform focusing on continuous analysis of source code quality. YES (Ans) NO Which is not a severities…

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DevOps Training – Class Recordings/Tutorials – November 2019

AWS Session – Class recording – Tutorials Docker Session – Class recording – Tutorials Jira Session – Class recording – Tutorials Git Session – Class recording – Tutorials SonarQube Session…

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All about AWS Certified Cloud Practitioner- Foundation

This certification path is meant for individuals who are seeking to build and validate overall understanding of the AWS Cloud in spite of their specific technical roles. It provides a…

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Kubernetes – How to Generate yaml files to produce the existing kubernetes resources of cluster?

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Gradle Tasks are exaplained in 10 mins!

Task in Gradle is a code that Gradle execute. Everything such a each type features is powered in Gradle using Plugin. Plugins add new tasks domain objects (e.g. SourceSet), conventions…

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How to buy Reserved Instance and verify if Reserved Instances are being used in AWS?

This article give 2 most important information about Reserved Instance. How to buy Reserved Instance in aws? Verify if Reserved Instances are being used? How do I buy Reserved Instances…

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How to install Ansible in Centos 7/RHEL 7?

How to install Ansible in Centos 7/RHEL 7? Install Ansible via Pip in RHEL/CENTOS

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Kibana 7.2 Install and configuration in RHEL 7/Centos

Install and Setup JDK 8+ Download and Install Kibana 7.X Configure Kibana 7.X How to start kibana service?

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How to use elastic search EC2 discovery plugin?

Problem To increase the performance in Elasticsearch, many times we add new nodes to Elasticsearch cluster and manually change the configuration file with new IP address, etc. so that it…

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Elastic Search Error – Node is started with, but has shard data

[2019-07-11T09:59:18,013][ERROR][o.e.b.Bootstrap ] [es-master01] Exception java.lang.IllegalStateException: Node is started with, but has shard data: [/home/ec2-user/elasticsearch-7.2.0/data/nodes/0/indices/6XsNftnbSbOnzPK3wOKc 0w/0]. Use ‘elasticsearch-node repurpose’ tool to clean up at org.elasticsearch.env.NodeEnvironment.ensureNoShardData( ~[elasticsearch-7.2.0.jar:7.2.0] at org.elasticsearch.env.NodeEnvironment.( ~[elasticsearch-7.2.0.jar:7.2.0] Solution

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Elastic Search Error – max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]

Errors [2]: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144] Solution To make it persistent, you can add this line: $ sudo vi /etc/sysctl.conf…

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Elastic Search Error – max file descriptors [4096] for elasticsearch process is too low, increase to at least [65535]

Elastic Search Error – max file descriptors [4096] for elasticsearch process is too low, increase to at least [65535] Solution Temporary to the current login session To set ulimit value…

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What is difference between application/x-ndjson and application/json?

Lets understand what is json? JSON stands for JavaScript Object Notation JSON is a lightweight format for storing and transporting data JSON is often used when data is sent from…

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ElasticSearch Error – Content-Type header [application/x-www-form-urlencoded] is not supported

To fix this, add curl option -H ‘Content-Type: application/json’. This error is due to strict content-type checking introduced in ElasticSearch 6.0 Solution

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Understading Octopus Deploy Backup and restore process

Your Master Key When an Octopus Server is installed, we generate a special key used for encryption, called the master key. The master key is then encrypted asymmetrically, using DPAPI,…

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How to create a subscribe form for your rss feed

  Create a subscribe form for your rss feed   Joomla Website with K2 Content   RSS To email using mailchimp   RSS To email using hubspot…

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