Load balancer

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

Dva upstreama

[[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"]

Balancing kontrole

Kontrola	Uporabi kada
`upstream_weights`	Backend trebaju dobiti različne udjele traffic.
`backup_upstreams`	Neki backend trebaju se uporabljati samo kada primary izbori zakažu.
`drain_upstreams`	Backend treba završiti postojeći posao, ali ne primati novi traffic.
`disabled_upstreams`	Backend mora ostati izvan rotacije.
`upstream_max_in_flight`	Backend treba local concurrency cap.

Dinamički upstream file

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

Uporabi static upstream kada trebaš weights, aliases, backup, drain ali disabled state. File in DNS refreshed pool namjerno drže contract manjim.

Kaj dobivaš

Focused load-balancer release images are available.
Health check lahko držati neispravne backend izvan rotacije.
Drain in force-down operacije pomažu tijekom maintenance window.
Managed-cookie affinity dostupan je kada session treba stabilan backend.