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69 lines
2.0 KiB
Markdown
69 lines
2.0 KiB
Markdown
---
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title: "Traefik HTTP Retry Documentation"
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description: "Configure Traefik Proxy's HTTP Retry middleware, so you can retry requests to a backend server until it succeeds. Read the technical documentation."
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---
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The `retry` middleware retries requests a given number of times to a backend server if that server does not reply.
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As soon as the server answers, the middleware stops retrying, regardless of the response status.
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The Retry middleware has an optional configuration to enable an exponential backoff.
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## Configuration Examples
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```yaml tab="Structured (YAML)"
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# Retry 4 times with exponential backoff
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http:
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middlewares:
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test-retry:
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retry:
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attempts: 4
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initialInterval: 100ms
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```
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```toml tab="Structured (TOML)"
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# Retry 4 times with exponential backoff
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[http.middlewares]
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[http.middlewares.test-retry.retry]
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attempts = 4
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initialInterval = "100ms"
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```
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```yaml tab="Labels"
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# Retry 4 times with exponential backoff
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labels:
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- "traefik.http.middlewares.test-retry.retry.attempts=4"
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- "traefik.http.middlewares.test-retry.retry.initialinterval=100ms"
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```
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```json tab="Tags"
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// Retry 4 times with exponential backoff
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{
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// ...
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"Tags" : [
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"traefik.http.middlewares.test-retry.retry.attempts=4",
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"traefik.http.middlewares.test-retry.retry.initialinterval=100ms"
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]
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}
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```
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```yaml tab="Kubernetes"
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# Retry 4 times with exponential backoff
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apiVersion: traefik.io/v1alpha1
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kind: Middleware
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metadata:
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name: test-retry
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spec:
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retry:
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attempts: 4
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initialInterval: 100ms
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```
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## Configuration Options
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| Field | Description | Default | Required |
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|:------|:------------|:--------|:---------|
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| `attempts` | number of times the request should be retried. | | Yes |
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| `initialInterval` | First wait time in the exponential backoff series. <br />The maximum interval is calculated as twice the `initialInterval`. <br /> If unspecified, requests will be retried immediately.<br /> Defined in seconds or as a valid duration format, see [time.ParseDuration](https://golang.org/pkg/time/#ParseDuration). | 0 | No |
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