68 lines
2.1 KiB
Markdown
68 lines
2.1 KiB
Markdown
# TODO -- RateLimit
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Protection from Too Many Calls
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{: .subtitle }
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The RateLimit middleware ensures that services will receive a _fair_ number of requests, and allows you define what is fair.
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## Configuration Example
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??? example "Limit to 100 requests every 10 seconds (with a possible burst of 200)"
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```toml
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[http.middlewares]
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[http.middlewares.fair-ratelimit.ratelimit]
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extractorfunc = "client.ip"
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[http.middlewares.fair-ratelimit.ratelimit.rateset1]
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period = "10s"
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average = 100
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burst = 200
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```
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??? example "Combine multiple limits"
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```toml
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[http.middlewares]
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[http.middlewares.fair-ratelimit.ratelimit]
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extractorfunc = "client.ip"
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[http.middlewares.fair-ratelimit.ratelimit.rateset1]
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period = "10s"
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average = 100
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burst = 200
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[http.middlewares.fair-ratelimit.ratelimit.rateset2]
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period = "3s"
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average = 5
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burst = 10
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```
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Here, an average of 5 requests every 3 seconds is allowed and an average of 100 requests every 10 seconds. These can "burst" up to 10 and 200 in each period, respectively.
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## Configuration Options
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### extractorfunc
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The `extractorfunc` option defines the strategy used to categorize requests.
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The possible values are:
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- `request.host` categorizes requests based on the request host.
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- `client.ip` categorizes requests based on the client ip.
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- `request.header.ANY_HEADER` categorizes requests based on the provided `ANY_HEADER` value.
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### ratelimit (multiple values)
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You can combine multiple ratelimit.
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The ratelimit will trigger with the first reached limit.
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Each ratelimit has 3 options, `period`, `average`, and `burst`.
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The rate limit will allow an average of `average` requests every `period`, with a maximum of `burst` request on that period.
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!!! note "Period Format"
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Period is to be given in a format understood by [time.ParseDuration](https://golang.org/pkg/time/#ParseDuration).
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