A Blog of the ZHAW Zurich University of Applied Sciences
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 […]
(Part 1/3 – Installation – Part 2/3 – troubleshooting) This part of the tutorial describes how to setup a simple Ceph client using librados (for C++). The only information that the client requires for the cephx authentication is Endpoint of the monitor node Keyring containing the pre-shared secret (we will use the admin keyring) Install librados APIs On Ubuntu, […]
(Part 1/3 – Installation – Part 3/3 – librados client) It is quite common that after the initial installation, the Ceph cluster reports health warnings. Before using the cluster for storage (e.g., allow clients to access it), a HEALTH_OK state should be reached: cluster-admin@ceph-mon0:~/ceph-cluster$ ceph health HEALTH_OK This part of the tutorial provides some troubleshooting hints that I […]
With the advent of large scale architectures came a need to improve the distribution of requests to optimize the throughput of the system while keeping a minimum response time. This is especially true for large web services. Load balancing is the ability to make many servers participate in the same service and do the same […]