Skip to main content

What is Docker Containers?

Docker, a new container technology, is hotter than hot because it makes it possible to get far more apps running on the same old servers 

Containers, use shared operating systems. That means they are much more efficient than hypervisors in system resource terms. Instead of virtualizing hardware, containers rest on top of a single Linux instance. This in turn means you can “leave behind the useless 99.9% VM junk, leaving you with a small, neat capsule containing your application,”
Therefore ,  with a perfectly tuned container system, you can have as many as four-to-six times the number of server application instances as you can using Xen or KVM VMs on the same hardware
Docker, however, is built on top of LXC. Like with any container technology, as far as the program is concerned, it has its own file system, storage, CPU, RAM, and so on. The key difference between containers and VMs is that while the hypervisor abstracts an entire device, containers just abstract the operating system kernel.

This, in turn, means that one thing hypervisors can do that containers can’t is to use different operating systems or kernels. So, for example, you can use Microsoft Azure to run both instances of Windows Server 2012 and SUSE Linux Enterprise Server, at the same time. With Docker, all containers must use the same operating system and kernel.
On the other hand, if all you want to do is get the most server application instances running on the least amount of hardware, you couldn't care less about running multiple operating system VMs. If multiple copies of the same application are what you want, then you'll love containers.
Docker brings several new things to the table that the earlier technologies didn't. The first is that it's made containers easier and safer to deploy and use than previous approaches. In addition, because Docker's partnering with the other container powers, including Canonical, Google, Red Hat, and Parallels, on its key open-source component libcontainer , it's brought much-needed standardization to containers.

Docker containers are easy to deploy in a cloud. Docker has been designed in a way that it can be incorporated into most DevOps applications, including Puppet, Chef, Vagrant, and Ansible, or it can be used on its own to manage development environments. The primary selling point is that it simplifies many of the tasks typically done by these other applications. 

Popular posts from this blog

HP CSA Implementation

I know the above picture is little confusing but don’t worry I break it down and explain in detail. By the time I am done explaining you all will be happy. HARDWARE AND SOFTWARE REQUIREMENTS 1.VMware vSphere infrastructure / Microsoft Hyper V: For the sake of Simplicity we will use VMware vSphere. We Need vSphere 4.0 /5/5.5 and above and vCenter 4.0 and above ready and installed. This is the first step. 2.We need Software medias for HP Cloud Service Automation, 2.00, HP Server Automation, 9.02, HP Operations Orchestration (OO)9.00.04, HP Universal CMDB 9.00.02, HP Software Site Scope, 11.01,HP Insight Software6.2 Update 1 3.DNS, DHCP and NTP systems are already installed and configured. NTP information should be part of VM templates 4.SQL Server 2005 or Microsoft® SQL Server 2008 or Microsoft® SQL Server 2012 , Oracle 11g, both 32-bit and 64-bit versions may be used for CSA database.
5.We will install  HP Cloud Service Automation, 2.00, HP Server Automation, 9.02, HP Operations Orchestra…

Data Center Migration

Note: This blog is written with the help of my friend Rajanikanth
Data Center Migrations / Data Center Consolidations
Data Center Consolidations, Migrations are complex projects which impact entire orgnization they support. They usually dont happen daily but once in a decade or two. It is imperative to plan carefully, leverage technology improvements, virtualization, optimizations.
The single most important factor for any migration project is to have high caliber, high performing, experienced technical team in place. You are migrating business applications from one data center to another and there is no scope for failure or broken application during migration. So testing startegy should be in place for enterprise business applications to be migrated.
Typical DCC and Migrations business objectives
Business Drivers
·Improve utilization of IT assets ·DC space & power peaked out - business growth impacted ·Improve service levels and responsiveness to new applications ·Reduce support complexi…

Openstack- Its importance in Cloud. The HP Helion Boost

Every enterprise expects few things from cloud computing, mainly:

· Auto scaling: The workload should increase and decrease as needed by the IT environment.

· Automatic repair: If there is any fault or crash of the application or the server, it automatically fix it

· Fault tolerant: The application or underlying technology is intelligent enough to make itself fault torrent

· Integrated lifecycle: It should have integrated lifecycle

· Unified management: Its easy to manage all different aspects of technology

· Less cost

· Speed

Its year 2014. till now only 5% to 7% enterprises are using cloud computing. Such a small number. Its a huge opportunity and a vast majority for anyone who is interested in providing cloud computing services.
Current IT environment is very complex. You just cant solve all your problems with cloud computing.
There are legacy systems, databases, data processors, different hardware and software. You name it , there are so many technology available in just o…