troubleshooting 归档 - 第9页 共26页 - 夜莺博客

标签：troubleshooting

ONTAP Volume Move: Cutover and Troubleshooting

ONTAP Volume Move: Cutover and Troubleshooting

Move an ONTAP FlexVol between aggregates safely: target-aggregate checks, volume move start and show, trigger-cutover, cutover windows and failure rec

admin admin 2026-09-14
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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

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OSPF Stub and NSSA Area Types: Configuration Guide

OSPF Stub and NSSA Area Types: Configuration Guide

OSPF area types compared: stub, totally stubby, NSSA and totally NSSA, how type-7 LSAs become type-5, translator election and multi-vendor CLI.

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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

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Nexus vPC: Peer-Gateway, Orphan Ports and Health Checks

Nexus vPC: Peer-Gateway, Orphan Ports and Health Checks

Cisco Nexus vPC beyond the basics: peer-gateway and ARP synchronize, orphan-port suspend behaviour, type-1 consistency checks and show vpc verificatio

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Optical Power Budget: How to Calculate a Fiber Link

Optical Power Budget: How to Calculate a Fiber Link

Calculate a fiber link loss budget before pulling cable: Tx power minus Rx sensitivity, dB/km, connector, splice and splitter values, with worked exam

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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

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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

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Ceph CRUSH Map: Device Classes and Custom Rules

Ceph CRUSH Map: Device Classes and Custom Rules

Use Ceph device classes (ssd, hdd, nvme) and CRUSH rules to land each pool on the right hardware, plus EC profiles, the upmap balancer and verificatio

admin admin 2026-09-14
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ZFS Send and Receive: Snapshot Replication Guide

ZFS Send and Receive: Snapshot Replication Guide

Replicate ZFS datasets end to end: recursive snapshots, incremental zfs send -R over SSH, raw sends for encrypted data, mbuffer tuning and stream veri

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