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Kafka KRaft Mode: Single-Node Setup and Operations

Run Apache Kafka without ZooKeeper: KRaft single-node setup, broker and controller roles, topic creation, retention settings and the commands you use

admin 2026-09-19

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Kubernetes Ingress TLS with cert-manager and Let's Encrypt

Automate Kubernetes TLS with cert-manager: install via Helm, create staging and production ClusterIssuers, HTTP-01 vs DNS-01 challenges and expiry mon

admin 2026-09-19

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systemd Timers vs Cron: Scheduling Jobs Properly

Replace cron with systemd timers: OnCalendar expressions, Persistent catch-up runs, journal logging, dependency handling and safe migration rules.

admin 2026-09-19

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YANG and OpenConfig Models: A Practical pyang Workflow

Work with YANG and OpenConfig models before automating: install models, render trees with pyang, validate JSON/XML payloads and map NETCONF paths.

admin 2026-09-19

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cloud-init Network Configuration v2: Static IPs and Bonds

Write cloud-init network config v2 for static IPs, multiple NICs, VLANs and bonds: netplan syntax, match rules, routes, and how to debug first-boot fa

admin 2026-09-19

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Redis Persistence: RDB vs AOF Configuration

Choose and tune Redis persistence: RDB snapshot triggers, AOF fsync policies, the hybrid RDB-preamble format and how to verify recovery behaviour.

admin 2026-09-15

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Prometheus relabel_configs: Target Labels Guide

Master Prometheus relabeling: pick the right relabel stage, use replace, keep, drop and hashmod, and debug why a target never gets scraped.

admin 2026-09-15

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Ansible Jinja2 Templates for Network Device Configs

Switch configuration becomes reviewable when Jinja2 templates render device variables and a two-phase Ansible deploy diffs the result before it is app

admin 2026-09-14

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Kubernetes Gateway API vs Ingress: Migration Guide

Migrate from Ingress to Gateway API: GatewayClass, Gateway and HTTPRoute ownership, TLS with ReferenceGrant, weighted canaries and policy attachment c

admin 2026-09-14

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ArubaOS-CX NAE: Scripts, Agents and Alerting

ArubaOS-CX Network Analytics Engine explained: monitors, rules, conditions and actions, plus how to upload scripts, run agents and debug the common NA

admin 2026-09-14

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标签：automation