Various Tech.

With the dramatically increasing demand for container orchestration specifically Kubernetes, demand to template K8S manifests(Json/Yaml) also came to light. To handle increasing manifests, new CRDs(Custom resource definition), etc… it became obvious that we need a package manager somewhat like yum, apt, etc… However, the nature of Kubernetes manifest is very different than what one used to have with Yum and Apt. These manifests required a lot of templates which is now supported by Helm, a tool written in GoLang with custom helm functions and pipelines. Neutral background on templating Templating has been a driver for configuration management for a long time. While it may seem trivial for users coming from Ansible, Chef, Puppet, Salt, etc…, it is not. Once one moves to Kubernetes, the very first realization is hard declarative approach that Kubernetes follows. It is difficult to make generic templating with declarative form since each application may have some unique feature and r...

I've used a few techniques for this kind of reading but gets failed until I've read this fine blog . http://www.bashguru.com/2010/05/how-to-read-file-line-by-line-in-shell.html this helps a lot and i have developed a trick for me. Refer to the following example to examine the script : #!/bin/bash #SCRIPT: method2.sh #PURPOSE: Process a file line by line with redirected while-read loop . FILENAME=$1 count=0 while read LINE do let count++ echo "$count $LINE" done < $FILENAME echo -e "\nTotal $count Lines read" I have passed the file in the end of the loop so i didn't need  to use pipe that is why i process the file in fastest manner and gives  the required output in a quick manner. However i can use one more thing the File Descriptors. The File Descriptors are similar to the normal file pointers however in  more analogue way.If you have used C then you will have familier with the  the default file openers in C "st...

Edit your Publish settings for Flash SWFs and HTML to reflect how you want your Flash SWF to appear in your web page. Export your Flash movie as HTML. Locate your HTML file on your computer, right-click, and select "Open With". Choose either NotePad or another text editor. Copy the source code from the HTML file. Paste it into your web page's source code in the appropriate location where you want your SWF file to display. Edit the file path to reflect the location of the SWF file on your web server, and upload both your HTML and SWF file to the appropriate directories on your server. ( Note:  this also applies if you're using PHP, JSP, ASP, CGI, or other web page extensions.) Your code should look something like this: <OBJECT classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,0,0" WIDTH="320" HEIGHT="240" id="You...

Start mysql in Ubuntu without having root privilege:- If you want to use mysql in Ubutu you can use following command which will use a root level privilege   $ mysql -u root -p Enter password: Welcome to the MySQL monitor.  Commands end with ; or \g. Your MySQL connection id is 147 Server version: 5.1.49-1ubuntu8.1-log (Ubuntu) When it demands to enter the password fill it with 'root' and hopefully you'll get logged in .   Last_insert_id():- (with no argument) returns the first automatically generated value that was set for an AUTO_INCREMENT column by the most recently executed INSERT statement to affect such a column. For example, after inserting a row that generates an AUTO_INCREMENT value, you can get the value like this:   mysql> SELECT LAST_INSERT_ID(); Database():- Database() method returns the current selected database and you can use it in your communication and your queries. The syntax is :   mysql>select Database (); User():- It a...

Hipchat Notify 2.0 Hipchat notification with API 2.0 to be used with ICINGA/Nagios Table of Contents Table of Contents Author Audience Introduction Ruby Script Script used on server Service notification Host notification Change in command.conf for Icinga server Example notification Roadmap Author Shubhamkr619@gmail.com Audience System Engineers and operation engineers Introduction Change the default mail notification of Icinga server to hipchat notification using ruby code. This will allow a single place of management of all the notification and alerts across organization. Let that be service,host or business level alerts all can be managed and monitored using hipchat and hubot will give certain advantage over traditional alerting system. Proactive and reactive alerting Managed monitoring Single place of all the alerts Better communication and collaboration Integration with multiple tools in CI cycle Jenkins Chef ...