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Category Archives: Cloud computing
Smart Grid Research with the ELK Stack. You Know, For Science.
The Elasticsearch tagline is “you know, for search”. But in our case, also for science. At Servicelab, we’re using Elasticsearch, Logstash and Kibana to monitor and analyze a Smart Grid pilot. Read on for the why and how.
Posted in Cloud computing, DevOps, internet of things
Tagged devops, elasticsearch, elk, kibana, logstash, powermatcher, smartgrid
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Installing a Storm cluster on CentOS hosts
Storm is a distributed, realtime computation system to reliably process unbounded streams of data. The following picture shows how data is processed in Storm: This tutorial will show you how to install Storm on a cluster of CentOS hosts. A … Continue reading
Installing Apache Libcloud on CentOS
Apache Libcloud is a standard Python library that abstracts away differences among multiple cloud provider APIs. At the moment it can be used to manage four different kinds of cloud services: servers, storage, loadbalancers and DNS. Here are the steps … Continue reading
Changing CPU and memory settings on XenServer VMs
You can change the CPU and memory settings of XenServer virtual machines using the API. XenServer allows you to set the priority of the virtual machine CPU (called weight), set a limit on the amount of CPU the virtual machine … Continue reading
Getting CPU, memory, disk and network metrics from XenServer
In a previous article we looked at getting CPU and memory metrics from XenServer. As noted in that article, as of version 5.5 of XenServer, the preferred way of getting virtual machine metrics is through HTTP calls to get RRD … Continue reading
Getting XenServer VM metrics in Java
XenServer is a product of Citrix that can run virtual machines on a set of physical hosts called a pool. There is an API that allows you to create programs that interact with the XenServer pool. There are some function … Continue reading
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