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vmalert: mention -datasource.appendTypePrefix in README (#1052)

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4
app/vmalert/README.md
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@ -188,12 +188,16 @@ Used as alert source in AlertManager.
vmalert sends requests to `<-datasource.url>/render?format=json` during evaluation of alerting and recording rules
if the corresponding group or rule contains `type: "graphite"` config option. It is expected that the `<-datasource.url>/render`
implements [Graphite Render API](https://graphite.readthedocs.io/en/stable/render_api.html) for `format=json`.
When using vmalert with both `graphite` and `prometheus` rules configured against cluster version of VM do not forget
to set `-datasource.appendTypePrefix` flag to `true`, so vmalert can adjust URL prefix automatically based on query type.
### Configuration
The shortlist of configuration flags is the following:
```
-datasource.appendTypePrefix
Whether to add type prefix to -datasource.url based on the query type. Set to true if sending different query types to VMSelect URL.
-datasource.basicAuth.password string
Optional basic auth password for -datasource.url
-datasource.basicAuth.username string

4
docs/vmalert.md
View File

@ -188,12 +188,16 @@ Used as alert source in AlertManager.
vmalert sends requests to `<-datasource.url>/render?format=json` during evaluation of alerting and recording rules
if the corresponding group or rule contains `type: "graphite"` config option. It is expected that the `<-datasource.url>/render`
implements [Graphite Render API](https://graphite.readthedocs.io/en/stable/render_api.html) for `format=json`.
When using vmalert with both `graphite` and `prometheus` rules configured against cluster version of VM do not forget
to set `-datasource.appendTypePrefix` flag to `true`, so vmalert can adjust URL prefix automatically based on query type.
### Configuration
The shortlist of configuration flags is the following:
```
-datasource.appendTypePrefix
Whether to add type prefix to -datasource.url based on the query type. Set to true if sending different query types to VMSelect URL.
-datasource.basicAuth.password string
Optional basic auth password for -datasource.url
-datasource.basicAuth.username string