Only five years ago I started my journey into IT certification and the first certificate of my life was VMware Certified Professional. From that moment my life changed becoming more and more involved in design and technical decision. My company position started growing and now I’m the head of virtualization and cloud specialist at LineaCOM, […]
vCenter is primary management tool for vSphere admins. It provides: point of control for all components in vDC management functionalities and services rights, permission and roles management storage and resource requirements management unification view of all resources provided by every ESXi host Components in vCenter Server PSC (Platform Services Controller) Components and feartures: SSO Licensing […]
Source: KB 2051652 https://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=2051652 Version 11 (>= Esxi 6.0) Version 10 (>= Esxi 5.5) Version 9 (>= ESXi 5.1) Max memory (GB) 4080 1011 1011 Max logical processors 128 64 64 max cores (vCPU) per socket 128 64 64 Max SCSI adapted 4 4 4 Supported SCSI adapter Bus logic LSI logic LSI-logic SAS […]
This is not only a study, this could be a rapid guide to identify logs locations and their purposes. Sources: KB 1021806 https://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1021806 ESXi Source: https://pubs.vmware.com/vsphere-60/index.jsp#com.vmware.vsphere.security.doc/GUID-F35D7005-58EB-48AC-99D5-B9942EB2A8EF.html VMkernel Location: /var/log/vmkernel.log Purpose: ESXi and VM activities VMKernel warnings Location: /var/log/vmkwarning.log Purpose: VM activities VMkernel summary Location:/var/log/vmksummary.log Purpose: uptime and statistics about ESXi Host Agent Location: […]
vSphere components use SSL to communicate securely with each other and with ESXi and is also used by vCenter services such as the vSphere Web Client for initial authentication to vCenter Single Sign-On. In vSphere >= 6.0, the VMware Certificate Authority (VMCA) provisions each ESXi host and each vCenter Server service with a certificate that […]
Sources: wikipedia (numa available in many languages) https://pubs.vmware.com/vsphere-60/index.jsp#com.vmware.vsphere.resmgmt.doc/GUID-7E0C6311-5B27-408E-8F51-E4F1FC997283.html ESXi supports memory access optimization for Intel and AMD Opteron processors in server architectures that support NUMA (non-uniform memory access). NUMA architecture developed in multiprocessor system where time to access to a single data by a processor depending on the processor position from memory. In NUMA a […]
Workload balancing is another vSphere feature that using vMotion and sVmotion increase the system efficiency and in some cases could be a cost savings solution. Sources: https://pubs.vmware.com/vsphere-60/index.jsp#com.vmware.vsphere.resmgmt.doc/GUID-98BD5A8A-260A-494F-BAAE-74781F5C4B87.html https://blogs.vmware.com/vsphere/2016/05/load-balancing-vsphere-clusters-with-drs.html (thx to Matthew Meyer) https://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1007485 Resource management Resource type are: CPU Memory Power Storage Network Resource providers are: Host Clusters Datastore cluster Resource consumers are VMs. Goals […]
The added value for a server to be virtualized in a vSphere environment is the agility to move itself across physical environment with near zero downtime. vSphere started talking about vMotion and storage vMotion to give back to customer the agility to minimize planned downtime for maintenance. Sources: Official doc: https://pubs.vmware.com/vsphere-60/index.jsp#com.vmware.vsphere.vcenterhost.doc/GUID-FE2B516E-7366-4978-B75C-64BF0AC676EB.html It is possible to […]
All of us know the direct installation via media, which is the most used by many folks during “poor” cluster installation (up to 6 nodes installation). But in this post I would highlight other installation methods, extracting pieces of infos from official docs: https://pubs.vmware.com/vsphere-60/index.jsp#com.vmware.vsphere.install.doc/GUID-D0A72192-ED00-4A5D-970F-E44B1ED586C7.html Scripted installation It’s possible to perform scripted way to install and […]
Backup and restore network configuration vSphere 5.1 and later enables you to backup and restore the configuration of a vSphere Distributed Switch. It’s possible to restore the virtual network configuration in cases of database or upgrade failure or use backup as template to create a copy to the same vSwitch in new vSphere environment. Export […]
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