Ansible is a popular configuration management and IT automation tool, it’s created by Michael DeHaan in 2012, unlike most of the configuration management tools Ansible doesn’t require agent at client server, it is an agentless tool that just requires only ssh access to the remote...
Continuing our quest for a replacement for OpsView, we stumbled upon Packetbeat monitoring system. Although it's not exactly a fully fledged monitoring system, since it doesn't include any method for alerting, it could provide excellent insights when troubleshooting complex issues involving a lot of moving...
We are still going through monitoring tools to find a replacement for Opsview. This time we are going to discover some features with the ELK stack (elasticsearch - Logstash - Kibana). ELK stack is considered one of the important logging solutions, that can store and analyze various...
A few days ago, one of our clients presented an interesting problem. They had several editions of an application with each edition being served for a specific client through his own subdomain. There exists a client(subdomain)-edition(document root) mapping in the database. They need to be able to map each client...
In the previous post, we talked about service discovery and how it become an important component of modern environments, and we tried to set up a Consul cluster and to register/deregister a python application with Consul and saw how to use Consul-template to update the...
Service Discovery became an important component to most environments who can’t be satisfied with static and manual configuration of components. Modern service discovery tools can provide a way for components in production environments to find and communicate with each other, so that it allows the service...
Ever since Opsview officially announced the deprecation of Opsview Core, the Nagios based monitoring and alerting system we use for monitoring applications and services on all servers that we manage, we have been looking for alternative monitoring solutions. Last week, we started exploring Prometheus, a newly released open...
Gunicorn is a simple yet powerful python WSGI HTTP server, it supports some python frameworks natively. It has many features like server hooks, SSL support, multiple worker types, and integeration with Django and Paster. Gunicorn is a pre-fork model server, which means that a master process...
Passenger is one of the most popular application servers. It is not just limited to Ruby applications, but it also supports Python WSGI so it can run for example Flask and Bottle applications. Passenger I/O Model Passenger 4 uses the evented I/O model, just like Nginx. While...
InnoDB Buffer Pool InnoDB buffer pool is one of the most important options for improving InnoDB performance. InnoDB buffer pool is a space reserved in memory which is used to save data and indexes that are frequently accessed. When MySQL server receives a query, if the...
