These days I had to troubleshoot a problem with system time within a VMware vSphere VM. During backup VM freezes for more than 30 seconds. When this happens, system time in VM also stops and resets to current time after the freeze. And this behavior causes massive problems in the application-layer. During troubleshooting we found a very slow VM snapshot deletion on NFS volumes on […]
Using PowerCLI to set mail recipient for a bulk of alarms
In this post I will describe how to use PowerCLI to add a trigger and a mail recipient to selected vSphere alarms. This is an excellent example of how PowerCLI can easily be used to do a task in a few moments while needing maybe hours when doing in GUI. A use-case for assigning a trigger and recipient to many alerts can be the implementation […]
Errors when installing SimpliVity Deployment Manager
To deploy new HPE SimpliVity nodes, you need to run Deployment Manager. Current version at writing: 3.7.6.244. Requirements to run Deployment Manager are: .NET 4.7.1 and Java 1.8. When .NET is not installed during installation, wizard links to Microsoft and starts the download. When Java is not installed or too old, an message is shown at first start. Sounds very simple. Anyway I had some […]
Public CA do not allow internal names and reserved IP address any more
With November 2015 public CAs do not issue new certificates that uses internal names or reserved IP addresses in subjectAltName or in commonName. Furthermore such certificates will be revoked on October 1st, 2016. Internal names are hostnames that do not end with an Top Level Domain ending (.com, .de, …). For example: .local, .internal. Also NetBIOS names without any domain extension are affected. Reserved IP addresses are defined […]
Stuff about SimpliVity
General Information First Hardware Partner is Dell (OmniCube), second is Cisco (OmniStack). These two are certified, but more manufacturer can become a partner in future. HW (Dell): two mirrored disks (rear, uses a separated Raid-controller) used for ESXi, 2x10Gbit, 2x1Gbit, Accelerator Card (NIC Port for diagnosis) Accelerator contains transistors that keeps electric current for 3 minutes. In case of power loss, RAM can be written […]
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