Skip to main content

Benefits of Docker Containers

Docker Container has many benefits over physical and virtualized systems, here we are mentioning some points.
Portability: let’s suppose in the case of Linux you have your own customized Nginx container. You can run that Nginx container anywhere, no matter it’s a cloud or Data Center on even your own laptop as long as you have a docker engine running Linux OS.
Rollback: you can just run your previous build image and all charges will automatically roll back.
Image Simplicity: Every image has a tree hierarchy and all the child images depend upon its parent image. For example, let’s suppose there is a vulnerability in docker container, you can easily identify and patch that parent image and when you will rebuild child, variability will automatically remove from all child.
Container Registry: You can store all images at a central location, you can apply ACLs, you can do vulnerability scanning and image signing.
Runtime: No matter you want to run thousand of container you can start all within five seconds.
Isolation: We can run hundred of the process in one Os and all will be isolated to each other.

Comments

Post a Comment

Popular posts from this blog

Troubleshooting Tomcat using Catalina log

Troubleshooting Tomcat using Catalina log We can get the  catalina  logs in  $CATALINA_HOME/logs Here we'll have a  catalina.out We can see some huge info in that log file. If we want to what exactly happens since the start of tomcat then we need to log that into a new file. By default we have log rotation enabled on this logs. For now let us stop tomcat and nullify the catalina.out file and then start tomcat to have some new info in the catalina.out # service tomcat stop # cd $CATALINA_HOME/logs # :> catalina.out (or) cat /dev/null > catalina.out # ll catalina.out -rw-r----- 1 root root 0 Feb 18 16:19 catalina.out # service tomcat start # ll catalina.out -rw-r----- 1 root root 17341 Feb 18 16:21 catalina.out We can see the log being written after the start of tomcat. Now we can notice the instance giving some information about the starting of tomcat, about the configuration for the startup, path of the servlet instance for which the log is re...
Post a Comment
Read more

Managing tomcat application

Tomcat is a servlet application which is ready to use after download. There is no need of installing this application. We can directly start or stop it from the bin directory.  So in such case we should go to the bin directory in the CATALINA_HOME or else we need to use the startup script along with its absolute path. And the same is needed to shut it down. We can use the below script to manage the tomcat application and we neither need to go to the CATALINA_HOME nor to use the absolute path. All we need to do is to change the permissions to make it executable and copy that to /sbin and /etc/init.d/ directories. If we copy this into /etc/init.d/ then also we need to mention the absolute path but we can easily memorize it as we know all the startup scripts exists there. But if we copy that into /sbin then there is absolutely no need of mentioning the path of the file. We can use this like below: # tomcat start|stop|restart|status #!/bin/bash # Author : Arjun S...
Post a Comment
Read more

Red Hat Enterprise Virtualization Manager RHEL 7 – Part 2

I have just published  what is RHEV  is the first article to understand RHEV Better. In order to maintain multiple RHEV-Hosts from central place RHEV-Manager is required. RHEV-M will be used as central place to manage all RHEV-Hosts. In this Article We are going to see HowTo Install RHEV-M Red Hat Enterprise Virtualization Manager RHEL 7. Red Hat Enterprise Virtualization Management (RHEV-M) is a virtual management console built on Red Hat Enterprise Linux (RHEL). It interacts with individual RHEV-Hosts using the Virtual Desktop Server Manager (VDSM). A VDSM agent is running on each of the RHEV-H nodes. RHEV-M allows administrators to manage/control number of data centers and their network, compute and storage resources. In addition RHEV-M provides a central repository for storing virtual machines, disks, images and virtual machine snapshots. Install RHEV-M Hardware Requirements Hard Disk Space Minimum 50GB RAM Minimum 4GB – Max 2TB Dual Core or High Processor 1Gb...
Post a Comment
Read more