November 26, 2018 Vignesh Sathiyanantham

Install python-pip $ yum install -y python-pip Then install Docker Compose: $ pip install docker-compose To verify a successful Docker Compose installation, run: $ docker-compose version

November 19, 2018 Vignesh Sathiyanantham

Backup applications for the Virtualized environment back up the Virtual Machine at the image level and are not aware of what is going on inside the installed guest operating system. So before you back up your Virtual Machines you should ensure they are quiesced so they are in a consistent state to be backed up. Quiesce is to pause or alter a device or application to achieve a consistent state, usually in preparation for a backup. The quiesce operation is handled inside the guest OS, and for Windows VMs, the Volume Shadow Copy Service (VSS) handles this. If you don’t…

November 16, 2018 Vignesh Sathiyanantham

VMware Virtual Machine snapshots should not be used as a primary backup, Virtual Machine snapshots are good for the shorter period. you can create VM snapshot before applying hotfix and delete after successful patching. When VM snapshots are created the state of the virtual disk at the time the snapshot is taken will be preserved and all writes to the VMDK are redirected to a new delta disk file (The delta disk represents the difference between the current state of the virtual disk and the state that existed at the time the previous snapshot was taken), and the original VMDK…

May 10, 2018 Vignesh Sathiyanantham

With vSphere 6.7 web services SOAP API  includes the creation date of a Virtual Machine and will be persisted with the life-cycle of the VM itself. You can get it from Virtual Machine -> Config -> createDate. Earlier to 6.7, we can track the VM Creation Time using EventManager. We should create an EventFilterSpec to filter the events by Virtual Machine creation or deployed, Registered or Cloned Events. new String[]{“VmCreatedEvent”, “VmBeingDeployedEvent”, “VmRegisteredEvent”, “VmClonedEvent”} Get Virtual Machine Creation Time earlier to vSphere 6.7 Java https://gist.github.com/asvignesh/fd97f4cbc41ac55e5b289c3424c0f09a vSphere Power CLI https://gist.github.com/asvignesh/327169f8456bbd613eebfad3d9768fa8

May 5, 2018 Vignesh Sathiyanantham

I recently had a demand to deploy an OVF (Open Virtualization Format is an open-source standard for packaging and distributing software applications for virtual machines) which is located on Datastore of ESXi Server. When you try to deploy from vSphere web client ( Flash / HTML) you can specify the OVF URL or the location accessible from my computer. Specifying the path from the local computer is simple if browser detects the VMware Client Integration tool. But you cant see the option to deploy from Datastore. How to Deploy an OVF from ESXi Datastore In vSphere, you have an option to…

January 22, 2018 Vignesh Sathiyanantham 1Comment

Recently, An Indiana hospital paid a ransom of $55,000 to get rid of ransomware that had infected its systems and was hindering operations. when attackers breached the network of Hancock Health, a regional hospital in the city of Greenfield, Indiana. Hancock Health CEO Steve Long said the hackers are believed to be in eastern Europe and may have used a type of ransomware called SamSam, SamSam encrypted files and renamed them with the phrase “I’m sorry”, according to a local newspaper who broke the news. The hospital said that despite having backups it opted to pay the ransom demand of…

January 15, 2018 Vignesh Sathiyanantham

Today’s developers and organizations are migrating large, monolithic legacy applications to microservice-based architectures to improve scalability and developer velocity. However, these benefits come at a cost, namely integration complexity. Additionally, developers still often interact directly with the infrastructure, whether it be virtual machines (VMs) or containers via Kubernetes or another container orchestrator. Serverless is the next evolution of application and system design and deployment. Serverless applications are built upon functions—small code artifacts, which are compact and specific to a discrete task. Serverless doesnt means servers are no more required to run workloads, it simply means that developers no longer has…

January 6, 2018 Vignesh Sathiyanantham

Amazon Linux a free, very up-to-date OS, complete with all AWS tools, Amazon has made it pretty compelling to use their OS over any others. But it was not open source. Now Amazon released Amazon Linux 2 an open source* Linux operating system. It provides a high performance, stable, and secure execution environment for cloud and enterprise applications. Amazon Linux 2 will offer the extended availability of software updates for the core operating system through 5 years of long-term support and provides access to the latest software packages through the Amazon Linux Extras repository. Earlier Amazon Linux was available only as AMI…

September 8, 2015 Vignesh Sathiyanantham 2Comment

Recently My client have been having some issues with the vSphere web client plugins, they were getting #1009 error often Initially i googled and try to find the solution and root cause, many blogs are suggesting disable the installed plugins and try again. Later i read somewhere ( forget the link) , clearing cache would help This issue is because of the cached objects and it happened when you are navigating through the inventory in the vSphere 6.0, usually this error message pops up, you have to refresh your full web page Error 1009, click yes…

October 9, 2014 Vignesh Sathiyanantham

VMware vCenter 5.1 and before the default behavior was to allow all domain admins to login and administrate your ESXi hosts. Once the 5.5 vCenter installed if you try and connect using a domain account you will get the error :The vSphere Client could not connect to “FQDN / IP”. You do not have permission to login to the server: FQDN / IP   To get domain credentials to work you need to login to the VMware vSphere Web Client and setup the relevant permissions. So how to login to vCenter using web client if domain users are not allowed?…