What was done:- migration from puppet to ansible- automation of bare metal servers setup- installation/configuration/operation of HDFS, Yarn, Spark, Kafka, Scylladb- automated deployment of clickhouse clusters on bare metal servers- automated deployment of clickhouse clusters in gcp (ansible, terraform)

Administration of a large number of 400+ bare metal servers - puppet (hierra) configuration management system - ci/cd jenkins (install/configure/pipelines) - prometheus monitoring

What was done:- Creation of a fault-tolerant cluster to run microservices. Based on docker + hashicorp nomad- Centralized logging using elk- Monitoring microservices with prometheus + alertmanager. - Visualization of technical and business metrics in grafana and kibana - Automation of infrastructure deployment using ansible

Administration of the server and network infrastructure of the hosting provider. What did you have to work with:- Setup and operation of bare metal servers OS Ubuntu, Centos, FreeBSD- Setup and operation of virtualization hosts KVM, LXC, FreeBSD Jail- Setup and operating exim, postfix mail systems- Configure apache, nginx, php-fpm web servers- Configure L2-L3 switches cisco, juniper

Technical support for web hosting users.