HowTos Archive

Setup a Kubernetes Cluster on OpenStack with Heat

In this post we take a look at Kubernetes and help you setup a Kubernetes Cluster on your existing OpenStack Cloud using its Orchestration Service Heat. This Kubernetes Cluster should only be used as a Proof of Concept. Technology involved: Kubernetes: https://github.com/GoogleCloudPlatform/kubernetes CoreOS: https://coreos.com/ etcd: https://github.com/coreos/etcd fleet: https://github.com/coreos/fleet flannel: https://github.com/coreos/flannel kube-register: https://github.com/kelseyhightower/kube-register The Heat Template used in this Post is available on […]

23.10.2014 Michael Erne

Kategorie: Articles, HowTos, OpenStack

A Web Application to Monitor and Understand Energy Consumption in an Openstack Cloud

In one of our projects we need to understand the energy consumption of our servers. Our initial work in this direction involved collecting energy consumption data using Kwapi and storing it in Ceilometer for further study. The data stored in Ceilometer is valuable; however, it is insufficient to really understand energy consumption in detail. Consequently, […]

07.10.2014 Bruno Grazioli

Kategorie: Articles, Education, HowTos, News, Open Source, OpenStack, Standards

Profiling the Ceilometer API to Identify Performance Bottlenecks

We are using ceilometer to collect data energy from our servers. As noted previously we were having some performance issues and we needed to investigate further. In this blog post we will cover our approach to performing profiling on ceilometer API to determine where the problems arose. Of course, the first step was to take […]

05.08.2014 Bruno Grazioli

Kategorie: Articles, HowTos, News, Open Source

Ceph: OSD “down” and “out” of the cluster – An obvious case

When setting up a cluster with ceph-deploy, just after the ceph-deploy osd activate phase and the distribution of keys, the OSDs should be both “up” and “in” the cluster. One thing that is not mentioned in the quick-install documentation with ceph-deploy or the OSDs monitoring or troubleshooting page (or at least I didn’t find it), is that, upon (re-)boot, mounting […]

04.06.2014 piiv

Kategorie: Articles, HowTos

Ceilometer Performance issues

Update: This does not apply to Icehouse. This flag was to activate an experimental feature -this option no longer exists in Icehouse. (It is in Havana, however). There have been some criticisms of the implementation of Ceilometer (or Telemetry as of Icehouse) – however, it’s still the main show in town for understanding what’s going […]

27.05.2014 Sean Murphy

Kategorie: *.*, Articles, HowTos

Benchmarking OpenStack by using Rally – part 1

As system administrators it is difficult to gather performance data before going productive. Benchmarking tools offer a comfortable way to gather performance data by simulating usage of a productive system. In the OpenStack world we can employ the Mirantis Rally tool to benchmark VM performance of our cloud environment. Rally comes with some predefined benchmarking […]

12.05.2014 benn

Kategorie: Articles, HowTos

Manage instance startup order in OpenStack Heat Templates

In many applications it is necessary to create virtual resources in a certain order. As an orchestration engine, Heat is able to support such a requirement, but how it is actually done in a template can be tricky. Recently I had to write such a Heat template, which seemed pretty easy as there is a number […]

02.05.2014 dudo