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configuring load balancing per ingress (#2167)

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* configure load balancing through a ingress annotation

* update docs
This commit is contained in:
Elvin Efendi 2018-03-09 13:09:41 -08:00 • committed by Manuel Alejandro de Brito Fontes
parent 4a49d67adc
commit 36cce00fdd
11 changed files with 156 additions and 10 deletions
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docs/user-guide/annotations.md
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@ -58,6 +58,7 @@ The following annotations are supported:
|[nginx.ingress.kubernetes.io/upstream-max-fails](#custom-nginx-upstream-checks)|number|
|[nginx.ingress.kubernetes.io/upstream-fail-timeout](#custom-nginx-upstream-checks)|number|
|[nginx.ingress.kubernetes.io/upstream-hash-by](#custom-nginx-upstream-hashing)|string|
|[nginx.ingress.kubernetes.io/load-balance](#custom-nginx-load-balancing)|string|
|[nginx.ingress.kubernetes.io/upstream-vhost](#custom-nginx-upstream-vhost)|string|
|[nginx.ingress.kubernetes.io/whitelist-source-range](#whitelist-source-range)|CIDR|
|[nginx.ingress.kubernetes.io/proxy-buffering](#proxy-buffering)|string|
@ -137,6 +138,11 @@ To enable consistent hashing for a backend:
`nginx.ingress.kubernetes.io/upstream-hash-by`: the nginx variable, text value or any combination thereof to use for consistent hashing. For example `nginx.ingress.kubernetes.io/upstream-hash-by: "$request_uri"` to consistently hash upstream requests by the current request URI.
### Custom NGINX load balancing
This is similar to https://github.com/kubernetes/ingress-nginx/blob/master/docs/user-guide/configmap.md#load-balance but configures load balancing algorithm per ingress.
Note that `nginx.ingress.kubernetes.io/upstream-hash-by` takes preference over this. If this and `nginx.ingress.kubernetes.io/upstream-hash-by` are not set then we fallback to using globally configured load balancing algorithm.
### Custom NGINX upstream vhost
This configuration setting allows you to control the value for host in the following statement: `proxy_set_header Host $host`, which forms part of the location block. This is useful if you need to call the upstream server by something other than `$host`.