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Merge pull request #4363 from antontroshin/resiliency-error-code-retries-docs 

Add HTTP and gRPC error codes retries to the resiliency policies documentation
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Hannah Hunter 2024-12-02 12:38:39 -05:00 committed by GitHub
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daprdocs/content/en/operations/resiliency/policies.md
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@ -49,6 +49,15 @@ The following retry options are configurable:
| `duration` | Determines the time interval between retries. Only applies to the `constant` policy.<br/>Valid values are of the form `200ms`, `15s`, `2m`, etc.<br/> Defaults to `5s`.|
| `maxInterval` | Determines the maximum interval between retries to which the `exponential` back-off policy can grow.<br/>Additional retries always occur after a duration of `maxInterval`. Defaults to `60s`. Valid values are of the form `5s`, `1m`, `1m30s`, etc |
| `maxRetries` | The maximum number of retries to attempt. <br/>`-1` denotes an unlimited number of retries, while `0` means the request will not be retried (essentially behaving as if the retry policy were not set).<br/>Defaults to `-1`. |
| `matching.httpStatusCodes` | Optional: a comma-separated string of HTTP status codes or code ranges to retry. Status codes not listed are not retried.<br/>Valid values: 100-599, [Reference](https://developer.mozilla.org/en-US/docs/Web/HTTP/Status)<br/>Format: `<code>` or range `<start>-<end>`<br/>Example: "429,501-503"<br/>Default: empty string `""` or field is not set. Retries on all HTTP errors. |
| `matching.gRPCStatusCodes` | Optional: a comma-separated string of gRPC status codes or code ranges to retry. Status codes not listed are not retried.<br/>Valid values: 0-16, [Reference](https://grpc.io/docs/guides/status-codes/)<br/>Format: `<code>` or range `<start>-<end>`<br/>Example: "1,501-503"<br/>Default: empty string `""` or field is not set. Retries on all gRPC errors. |
{{% alert title="httpStatusCodes and gRPCStatusCodes format" color="warning" %}}
The field values should follow the format as specified in the field description or in the "Example 2" below.
An incorrectly formatted value will produce an error log ("Could not read resiliency policy") and `daprd` startup sequence will proceed.
{{% /alert %}}
The exponential back-off window uses the following formula:
@ -77,7 +86,20 @@ spec:
maxRetries: -1 # Retry indefinitely
```
Example 2:
```yaml
spec:
policies:
retries:
retry5xxOnly:
policy: constant
duration: 5s
maxRetries: 3
matches:
httpStatusCodes: "429,500-599" # retry the HTTP status codes in this range. All others are not retried.
gRPCStatusCodes: "1-4,8-11,13,14" # retry gRPC status codes in these ranges and separate single codes.
```
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