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Add support for DATA_SOURCE_NAME_FILE #580

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Add support for DATA_SOURCE_NAME_FILE #580

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3 changes: 3 additions & 0 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -93,6 +93,9 @@ The following environment variables configure the exporter:
* `DATA_SOURCE_NAME`
the default legacy format. Accepts URI form and key=value form arguments. The
URI may contain the username and password to connect with.

* `DATA_SOURCE_NAME_FILE`
The same as above but reads the URI from a file.

* `DATA_SOURCE_URI`
an alternative to `DATA_SOURCE_NAME` which exclusively accepts the hostname
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10 changes: 10 additions & 0 deletions cmd/postgres_exporter/datasource.go
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Expand Up @@ -126,6 +126,16 @@ func getDataSources() ([]string, error) {
return strings.Split(dsn, ","), nil
}

dataSourceNameFile := os.Getenv("DATA_SOURCE_NAME_FILE")
if len(dataSourceNameFile) != 0 {
fileContents, err := ioutil.ReadFile(dataSourceNameFile)
if err != nil {
return nil, fmt.Errorf("failed loading data source name file %s: %s", dataSourceNameFile, err.Error())
}
dsnContent := strings.TrimSpace(string(fileContents))
return strings.Split(dsnContent, ","), nil
}

var user, pass, uri string

dataSourceUserFile := os.Getenv("DATA_SOURCE_USER_FILE")
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