LOG 归档 - 第4页共137页

Write Prometheus recording and alerting rules: rule group syntax, the level:metric:operations naming scheme, for and keep_firing_for behaviour.

admin 2026-10-08

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Design a vSAN stretched cluster: two data sites plus a witness host, fault domains, preferred site election and witness traffic separation explained.

admin 2026-10-08

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Configure the Ceph Object Gateway for S3: create realms, zonegroups and zones with radosgw-admin, then verify multisite sync and S3 API access.

admin 2026-10-08

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详解 Nginx limit_req_zone 与 limit_req 限流配置：漏桶算法、burst 突发缓冲、nodelay 与 delay 的区别，以及 503 状态码自定义。，含 limit_req_zone 内存区域定义、burst 与 nodelay 参数对突发流量的影响，以及 429

admin 2026-10-08

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Route HTTP traffic with HAProxy ACLs by host, path and source, then terminate TLS at the frontend with a combined PEM and HTTP-to-HTTPS redirect.

admin 2026-10-08

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Build a stateful nftables firewall using ct state: allow established and related traffic, drop invalid packets, and open specific ports per chain.

admin 2026-10-08

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Build ISP failover with Cisco IP SLA: icmp-echo probes, track objects, floating static routes with distance and NAT failover using route-maps.

admin 2026-10-08

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Diagnose jumbo frame failures: find the device with the low MTU using DF-bit pings, fix it, and understand why large pings fail only to some hosts.

admin 2026-10-08

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How DHCP Option 82 works per RFC 3046: the circuit-id and remote-id sub-options, insertion and stripping rules, and vendor configuration patterns.

admin 2026-10-08

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Build an EVPN-VXLAN fabric on Nokia SR Linux: MAC-VRF, IRB subinterface, vxlan-interface binding and BGP EVPN with real config examples.

admin 2026-10-08

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