ansible-error

Ansible Error while executing adhoc commands/playbook in windows remote

Error – Failed to connect to the host via ssh Solution – You need to set ansible_connection=winrm to connect to windows [windows] 13.233.160.153 [windows:vars] ansible_connection=winrm Error – auth method ssl…

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ansible-install-centos-rhel

How to install Ansible in Centos 7/RHEL 7?

How to install Ansible in Centos 7/RHEL 7?

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kibana-7-2-install-and-configuration-in-rhel-7-centos

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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elasticsearch-plugin

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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elasticsearch-error-node

Elastic Search Error – Node is started with node.data=false, 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 node.data=false, 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(NodeEnvironment.java:1065) ~[elasticsearch-7.2.0.jar:7.2.0] at org.elasticsearch.env.NodeEnvironment.(NodeEnvironment.java:324) ~[elasticsearch-7.2.0.jar:7.2.0] Solution

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elastic-search-error-max-virtual-memory-areas

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-max-file-descriptors

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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sample-data-elastic-search

How to create sample data to perform searches using elastic search?

Step 1 – Go to: http://www.json-generator.com/ Step 2 – Download and save as customers_full.json Step 3 – Open customers_full.json in sublimetext Remove the array brackets Find-Replace },{ with }\n{ in…

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application-x-ndjson-and-application-json

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-bulk-request

Elastic Search Error – The bulk request must be terminated by a newline

FIX – Add a New line in customers_full.json

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elasticsearch-error-illegal

ElasticSearch Error – illegal_argument_exception – Rejecting mapping update to type

########### COMMAND ################# ########### OUTPUT ########### Solution Multiple mapping types are not supported in indices created in 6.0 The ability to have multiple mapping types per index has been removed…

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elasticsearch-error-content-type-header

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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octopus-deploy-backup-and-restore

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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Prevent direct download of photos/video files from amazon s3

You can restrict access based on the HTTP referrer. It’s not bulletproof (Referrer can be spoofed) but it will stop casual downloads. Suppose you have a website with domain name…

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Ansible Include and Import with differences explanined!

This is one of the most frequest questions being asked in my workshop is that differences between using import or include in Ansible. For example import_role or include_role, what should…

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Understanding Ansible Architecture using diagram

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Understanding Ansible playbook using diagram

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Order of operations during Ansible playbook parsing explained!

We will delve into some specifics of how a playbook is parsed for Order of operations. Ansible can be assumed to be executed in a top to bottom order; that…

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How can I pass variable to ansible playbook in the command line?

It is possible to set variables at the command line using the –extra-vars (or -e) argument. Variables can be defined using a single quoted string (containing one or more variables)…

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Ansible include scnario with list of plays or tasks

Are you trying to use include in your playbook and coming across a error somthing like “A playbook must be a list of plays”. That means you are at right…

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How to specifying multiple groups in a playbook hosts specification?

By design, Ansible executes just one play at a time. Your playbook consists of two plays (the two items in the root-level YAML list defined by the playbook file). Method…

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Octopus deploy Package Deployment Feature Ordering

When Octopus deploys packages, it runs a series of actions implementing the conventions or features enabled for that step. The order of evaluation once the package is extracted is: BeforePreDeploy.*…

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Difference between ansible vars_files vs include_vars

Both of them have some commonalities but they solve different purposes. vars_files are read when the play starts. include_vars are read when the play reaches the task. Format vars_files: directive…

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Configuration Transforms in Octopus Deploy explained!

Before understanding “Configuration Transforms” in octopus deploy, lets understand what is “Web.config Transformation” in visual studio. What is Web.config? Web.config is an application configuration file of The Official Microsoft ASP.NET…

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How to create a Nuget Package using NuGet Package Explorer?

What is NuGet Package Explorer? NuGet Package Explorer (NPE) is an application that makes it easy to create and explore NuGet packages. You can load a .nupkg or .snupkg file…

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Understanding a world of DevOps from Richard Seroter

Introduction and Goals Hi, my name is Richard Seroter and welcome to this course on DevOps. We’re going to be covering the Big Picture of DevOps, hence the title, really…

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Octopus Deploy – How to handle deployment errors and script failure response.

Each of your scripts will be bootstrapped by the open-source Calamari project to provide access to variables and helper functions. You can see how your scripts are bootstrapped in the…

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Octopus Deploy – Send a Notification When Deployments Fail

If you are using Octopus Deploy as part of a continuous delivery pipeline, you’ll probably find that deployments don’t fail very often. This means, you need to send an email…

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Octopus Deploy – Deployment Examples and Sample Projects

Deploying software with Octopus Deploy involves packaging your applications and configuring your infrastructure. With those two steps completed, you need to define your deployment process by creating a project, adding steps and configuration variables, and creating releases. The section goes…

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Octopus Deploy – Run Multiple Processes steps on a Tentacle Simultaneously and Parallel

For each step that you define in you deployment processes, you can set conditions for greater control over the step’s execution. You can set conditions to: Run the step on…

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