2 Gennaio 2017 / Ultimo aggiornamento : 2 Gennaio 2017 admin Study Notes

VCP 6 Study Note – Logs purposes and locations

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: […]

30 Dicembre 2016 / Ultimo aggiornamento : 30 Dicembre 2016 admin Study Notes

VCP 6 Study Note – Security Certificate

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 […]

28 Dicembre 2016 / Ultimo aggiornamento : 28 Dicembre 2016 admin Study Notes

VCP 6 Study Note – Numa system with ESXi

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 […]

27 Dicembre 2016 / Ultimo aggiornamento : 27 Dicembre 2016 admin Networking

VPN Client with pfSense

In some situations it could happens to use a client vpn to access in some lan or network segment to manage or interacts with systems that are isolated from external access. In this post I’ll show howto do it with pfSense. Installation and configuration new virtual machine GuestOS: Other FreeBSD 64bit Hardware (min): 1 vCPU […]

27 Dicembre 2016 / Ultimo aggiornamento : 27 Dicembre 2016 admin Study Notes

VCP 6 Study Note – Balancing resources DRS and SDRS

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 […]

26 Dicembre 2016 / Ultimo aggiornamento : 26 Dicembre 2016 admin Study Notes

VCP 6 Study Note – VM migration (Cold, vMotion, svMotion, EVC)

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 […]

23 Dicembre 2016 / Ultimo aggiornamento : 26 Dicembre 2016 admin Study Notes

VCP 6 Study Note – Multiple ways to install ESXi

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 […]

21 Dicembre 2016 / Ultimo aggiornamento : 26 Dicembre 2016 admin Networking

VCP 6 Study Note – Advanced Networking Concepts Part2 : Backup restore and recovery management

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 […]

20 Dicembre 2016 / Ultimo aggiornamento : 20 Agosto 2018 admin Networking

VCP 6 Study Note – Advanced Networking Concepts Part1 : Networking policies, LACP Support

I’m writing this post to highlight some advanced vSphere topics during my VCP6 Study. Sources for this post are: vSphere 6 Official Docs (https://pubs.vmware.com/vsphere-60/index.jsp#com.vmware.vsphere.networking.doc/GUID-35B40B0B-0C13-43B2-BC85-18C9C91BE2D4.html) KB 2051826 https://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=2051826 KB 2034277 https://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=2034277 Link aggregation and LACP Basics https://www.thomas-krenn.com/en/wiki/Link_Aggregation_and_LACP_basics Networking policies You apply networking policies differently on vSphere Standard Switches and vSphere Distributed Switches: vSphere Standard Network Switch […]

19 Dicembre 2016 / Ultimo aggiornamento : 19 Dicembre 2016 admin IT

Boring vSphere client issue on Windows 10

New vSphere version comes with a powerful web user interface, and this blog post could be “outdated”. But a great part of sysadmins, which use C# Client on Windows 10 could meet a strange graphical issue opening VM console: To solve this issue, according with some forum, and personally verified, you must uncheck the […]