traefik/docs/content/middlewares/ratelimit.md

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# RateLimit
Protection from Too Many Calls
{: .subtitle }
![RateLimit](../assets/img/middleware/ratelimit.png)
The RateLimit middleware ensures that services will receive a _fair_ number of requests, and allows you define what is fair.
## Configuration Example
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```yaml tab="Docker"
# 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.
labels:
- "traefik.http.middlewares.test-ratelimit.ratelimit.extractorfunc=client.ip"
- "traefik.http.middlewares.test-ratelimit.ratelimit.rateset.rate0.period=10s"
- "traefik.http.middlewares.test-ratelimit.ratelimit.rateset.rate0.average=100"
- "traefik.http.middlewares.test-ratelimit.ratelimit.rateset.rate0.burst=200"
- "traefik.http.middlewares.test-ratelimit.ratelimit.rateset.rate1.period=3s"
- "traefik.http.middlewares.test-ratelimit.ratelimit.rateset.rate1.average=5"
- "traefik.http.middlewares.test-ratelimit.ratelimit.rateset.rate1.burst=10"
```
```yaml tab="Kubernetes"
# 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.
apiVersion: traefik.containo.us/v1alpha1
kind: Middleware
metadata:
name: test-ratelimit
spec:
rateLimit:
extractorfunc = "client.ip"
rate0:
period = "10s"
average = 100
burst = 200
rate1:
period = "3s"
average = 5
burst = 10
```
```json tab="Marathon"
"labels": {
"traefik.http.middlewares.test-ratelimit.ratelimit.extractorfunc": "client.ip",
"traefik.http.middlewares.test-ratelimit.ratelimit.rateset.rate0.period": "10s",
"traefik.http.middlewares.test-ratelimit.ratelimit.rateset.rate0.average": "100",
"traefik.http.middlewares.test-ratelimit.ratelimit.rateset.rate0.burst": "200",
"traefik.http.middlewares.test-ratelimit.ratelimit.rateset.rate1.period": "3s",
"traefik.http.middlewares.test-ratelimit.ratelimit.rateset.rate1.average": "5",
"traefik.http.middlewares.test-ratelimit.ratelimit.rateset.rate1.burst": "10"
}
```
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```yaml tab="Rancher"
# 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.
labels:
- "traefik.http.middlewares.test-ratelimit.ratelimit.extractorfunc=client.ip"
- "traefik.http.middlewares.test-ratelimit.ratelimit.rateset.rate0.period=10s"
- "traefik.http.middlewares.test-ratelimit.ratelimit.rateset.rate0.average=100"
- "traefik.http.middlewares.test-ratelimit.ratelimit.rateset.rate0.burst=200"
- "traefik.http.middlewares.test-ratelimit.ratelimit.rateset.rate1.period=3s"
- "traefik.http.middlewares.test-ratelimit.ratelimit.rateset.rate1.average=5"
- "traefik.http.middlewares.test-ratelimit.ratelimit.rateset.rate1.burst=10"
```
```toml tab="File"
# 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.
[http.middlewares]
[http.middlewares.test-ratelimit.ratelimit]
extractorfunc = "client.ip"
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[http.middlewares.test-ratelimit.ratelimit.rate0]
period = "10s"
average = 100
burst = 200
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[http.middlewares.test-ratelimit.ratelimit.rate1]
period = "3s"
average = 5
burst = 10
```
## Configuration Options
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### `extractorfunc`
The `extractorfunc` option defines the strategy used to categorize requests.
The possible values are:
- `request.host` categorizes requests based on the request host.
- `client.ip` categorizes requests based on the client ip.
- `request.header.ANY_HEADER` categorizes requests based on the provided `ANY_HEADER` value.
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### `ratelimit`
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You can combine multiple rate limits.
The rate limit will trigger with the first reached limit.
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Each rate limit has 3 options, `period`, `average`, and `burst`.
The rate limit will allow an average of `average` requests every `period`, with a maximum of `burst` request on that period.
!!! note "Period Format"
Period is to be given in a format understood by [time.ParseDuration](https://golang.org/pkg/time/#ParseDuration).