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kube-proxy Modes: iptables vs IPVS vs nftables

kube-proxy Modes: iptables vs IPVS vs nftables

Compare kube-proxy iptables, IPVS and nftables modes: data structures, performance at scale, deprecation status and how to check what your cluster run

admin admin 2026-09-15
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Prometheus relabel_configs: Target Labels Guide

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 admin 2026-09-15
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nftables Migration: iptables and ipset to Sets

nftables Migration: iptables and ipset to Sets

Migrate iptables and ipset rules to nftables: translate sets into native sets and verdict maps, keep NAT working, and persist the ruleset.

admin admin 2026-09-15
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Alertmanager Routing, Grouping and Silences That Work

Alertmanager Routing, Grouping and Silences That Work

A working Alertmanager: routing trees, group_by tuning, inhibit_rules with equal, mute timings, amtool silences, clustered peers and end-to-end verifi

admin admin 2026-09-14
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smartctl and smartd: Catch Failing Disks Early

smartctl and smartd: Catch Failing Disks Early

SMART done properly: the attribute columns that matter, HDD, SAS and NVMe failure predictors, smartd scheduling, Prometheus export and safe RAID repla

admin admin 2026-09-14
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VictoriaMetrics: Single-Node vs Cluster Deployment

VictoriaMetrics: Single-Node vs Cluster Deployment

Choose between VictoriaMetrics single-node and cluster: series cardinality sizing, retention and downsampling, vmctl migration, vmbackup restore and t

admin admin 2026-09-14
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systemd-resolved and resolvectl: DNS Troubleshooting

systemd-resolved and resolvectl: DNS Troubleshooting

Fix DNS on systemd hosts: the stub on 127.0.0.53, resolvectl status, query and per-link route-only domains, DNSSEC pitfalls and why resolv.conf keeps

admin admin 2026-09-14
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NVMe over TCP: Target and Initiator Setup Guide

NVMe over TCP: Target and Initiator Setup Guide

Set up NVMe over TCP end to end: nvmet kernel target via nvmetcli, host NQN access control, nvme-cli discovery and connect, multipath failover and jum

admin admin 2026-09-14
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WireGuard MTU and Handshake Failures: Fix Guide

WireGuard MTU and Handshake Failures: Fix Guide

Diagnose WireGuard tunnels that ping but stall: path MTU maths, PersistentKeepalive for NAT, AllowedIPs mistakes, forwarding, MASQUERADE and verificat

admin admin 2026-09-14
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NGINX stream Module: TCP and UDP Load Balancing

NGINX stream Module: TCP and UDP Load Balancing

NGINX stream module: proxy and load balance TCP and UDP. Build listeners, upstreams, balancing methods, timeouts, TLS passthrough, logs and health che

admin admin 2026-09-14
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