Databases are often the most critical part of an infrastructure. Failure of a database server often leads to a failure of other components because a database server is required for their functionality.
Continue reading “How to Make High Available Mysql Cluster with Galera”Safe database master-master setup
At first let’s remind ourselves what master-master setup means. Master-master method belongs to Multi-master replication method, in database replications you have 2 types on nodes – master and slave.
Continue reading “Safe database master-master setup”Linux Systemd Services
Systemd is a fairly recent part of linux operating system – RedHat started developing systemd in 2010 and it was added to version 15 of ubuntu linux back in the year 2015. It is responsible for booting the system correctly and maintaining all its services in its proper state.
Continue reading “Linux Systemd Services”Openstack Heat Orchestration
On hot summer days when the heat is in the air, my mind starts to think about vacation and the time passing by, but business never stops and it’s nice to have all things nicely prepared before you leave the office. Especially when you can use OpenStack instrument called Heat. So, let’s take look at it a bit.
Continue reading “Openstack Heat Orchestration”Automating Builds of Prometheus Exporters via Jenkins Pipeline
Let’s say you have just finished installing Prometheus, full of enthusiasm you want to take another step, create the structure of exporters and sort out from which exact services you want to harvest metrics.
Continue reading “Automating Builds of Prometheus Exporters via Jenkins Pipeline”