Koevn
Infrastructure & DevOps Engineer
Infrastructure & DevOps engineer. Writing about what I build, break, and fix.
I'm Koevn — an infrastructure and DevOps engineer who works with Linux systems, cloud platforms, and container orchestration day in and day out. This site is where I log what I learn on the job: the configurations that worked, the troubleshooting rabbit holes, and the automation patterns that saved me (and might save you) hours of debugging.
What I Work With
Linux & Storage
CentOS/RHEL/Ubuntu, LVM, disk partitioning, RAID, filesystem tuning (XFS/ext4), boot troubleshooting, systemd service hardening
Kubernetes & Containers
K8s cluster deployment (kubeadm/binary), container networking (CNI), Helm, Docker, Podman, container runtime troubleshooting
Networking
Nginx/HAProxy/Keepalived, network bonding/bridge/VLAN, Open vSwitch, BGP, SSL VPN, iptables/nftables, DNS (Bind/PowerDNS)
Cloud & Virtualization
Proxmox VE, KVM/qemu, public cloud (AWS/Cloudflare), Proxmox backup strategies, VM migration
Monitoring & Logging
Prometheus + Grafana, Zabbix, ELK/EFK stack (Elasticsearch, Logstash, Filebeat, Kibana), alerting pipelines
Automation & Tooling
Shell scripting, Ansible, Jenkins CI/CD, Git workflows, Terraform, Infrastructure as Code
Data & Middleware
MySQL/MariaDB, Redis, Kafka (topic management, consumer groups, partitioning), NFS, Samba AD
Security & Access
SSL/TLS certificate management (acme.sh, Let's Encrypt), SSH hardening, firewall policies, PAM authentication