負載平衡器

Run several upstreams behind one public endpoint. Start simple, then add health checks and runtime controls.

兩個上游

[[vhosts.routes]]
name = "app"
path_prefix = "/"
action = "proxy"

[vhosts.routes.proxy]
upstreams = [
  "10.0.0.11:8080",
  "10.0.0.12:8080",
]
upstream_weights = [100, 50]
upstream_aliases = ["app-a", "app-b"]

平衡控制

控制	以下情況使用
`upstream_weights`	後端s should receive different 流量 shares.
`backup_upstreams`	部分後端只應該喺主要選擇失效嗰陣先使用。
`drain_upstreams`	A 後端 should finish existing work but receive no new 流量.
`disabled_upstreams`	A 後端 must be kept out of rotation.
`upstream_max_in_flight`	A 後端 needs a local concurrency cap.

Dynamic 上游 file

[vhosts.routes.proxy]
upstreams_file = "/run/fluxheim/backends/app.txt"
upstreams_file_refresh_secs = 5

需要 weight、alias、backup、drain 或 disabled 狀態時，請用 static upstream。由 file 同 DNS 更新嘅 pool 會刻意維持較少功能。

你會得到啲乜

Focused load-balancer release images are available.
health check 可以將故障 backend 移出 rotation。
排空和強制關閉操作有助於維護視窗。
Managed-cookie affinity is available when sessions need a stable 後端.