Sometimes VM volume snapshots in ACS can stuck in exotic states like ‘Allocated’, ‘BackingUp’. They can not be removed through API in those states. Unfortunately, the problem occurs from time to time in every ACS version and last time we met it in ACS 4.9.2. Administrator must remove them somehow from ACS. The article provides the step-by-step guide how to address the problem.
On August 17th, 2017 we took a part in European CloudStack users group meetup in London, which was held by the company ShapeBlue. Among the event attendants were several leading European developers and main CloudStack users, such as ShapeBlue, Nuage Networks, NetApp SolidFire, Itelligence AG, PCExtreme and others.
The meetup covered the CloudStack release 4.10, the developers presented their new and updated developments for CloudStack, as well as several conceptual reports on new ACS topologies based on the concept of Network Function Virtualization
This article discusses a theoretical foundation for code coverage analysis as well as a practical implementation approach based on the Travis-CI continuous integration system and the Coveralls code coverage analysis tool.
Code quality is the cornerstone of any project. Poor code imposes more and more overhead for its maintenance over time, while adding new features takes more time and effort than it would for the quality code. It goes without saying, that criteria for code quality are not universal, they are defined and modified throughout the life cycle of the code.
There are many ways and tools for managing code quality from technical, as well as from organizational perspectives. These tools, when applied by experienced professionals, can ensure compliance with high standards and make the developers proud of their code. These very same tools may in other cases completely paralyze the team by encouraging the developers to dovetail their code for passing excessive checks, at the same time ignoring its more important quality-defining properties.
On August 8, 2017 we released Cloudstack-UI 1.0.7. During the work on the current release the team’s
main efforts were directed to the implementation of plugin functionality that is absent in the native CloudStack API,
namely we created two new plugins — WebShell and Pulse.
Our company develops distributed software applications. In order to provide cooperation between components, these applications employ different methods of inter-process communication. The most of the complexity arises during the implementation of the algorithms for distributed processing of interconnected data. These problems require utilization of a special purpose distributed coordination system. The most popular and widely used coordination system is Apache Zookeeper.