Brand Claim Brand Claim
by Kurt Garloff

Relocating VMs from one pool to another in OTC

Scope

When you need to scale vertically, i.e. change the available vCPUs or RAM assigned to a VM in OTC, you can use the resize (change specifications) feature and change the flavor of an existing VM. You can do this via the web interface or the API -- when you then restart the VM, it will come up with the new flavor type.

by Daniela Ebert & Kurt Garloff

Proposal for new Linux image registration policies

Executive Summary

Currently, for each Linux image, there are two series of images, one with a datestamp (e,g, _20180106_0) and one with a _latest name which gets renamed to _prevN and hidden upon a new _latest image registration. We have followed a roughly monthly update schedule (aligning with the Windows world) for the datestamp images and the _latest images while pushing out additional _latest images in between occasionally based on major improvements, bug fixes or security issues.

by Kurt Garloff

Root Cause Analysis and Improvements on OTC Network Outage 2017-11-08

About this document

The Open Telekom Cloud(OTC) had a broad network outage on 2017-11-08 from 13:44 CET until 14:41 CET. The OTC customers were informed about it an hour after the event and some details on what exactly happened were sent out in the morning of 2017-11-10.

by Kurt Garloff

Guide for using SNAT on OTC

Overview

The Open Telekom Cloud_ (OTC) allows customers to associate elastic IPs (floating IPs) with vNICs (ports) on Virtual Machines (VMs) to expose them to the internet and support in- and outgoing connections.

by Kurt Garloff

Public Services in OTC

The Open Telekom Cloud (OTC) offers a number of services to customer VMs that these can use without needing to have internet access.

While many of these are preconfigured in the public images from the OTC ImageFactory and thus will automatically be used, customers with private images will need to configure their images (and networks) to use these explicitly. Customers creating subnets via the API will also need to configure the name server (DNS) themselves.