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Signed-off-by: xuweiwei <xuweiwei_yewu@cmss.chinamobile.com> Co-authored-by: xuweiwei <xuweiwei_yewu@cmss.chinamobile.com>
74 lines
3.2 KiB
Markdown
74 lines
3.2 KiB
Markdown
# geoip
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## Name
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*geoip* - Lookup maxmind geoip2 databases using the client IP, then add associated geoip data to the context request.
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## Description
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The *geoip* plugin add geo location data associated with the client IP, it allows you to configure a [geoIP2 maxmind database](https://dev.maxmind.com/geoip/docs/databases) to add the geo location data associated with the IP address.
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The data is added leveraging the *metadata* plugin, values can then be retrieved using it as well, for example:
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```go
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import (
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"strconv"
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"github.com/coredns/coredns/plugin/metadata"
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)
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// ...
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if getLongitude := metadata.ValueFunc(ctx, "geoip/longitude"); getLongitude != nil {
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if longitude, err := strconv.ParseFloat(getLongitude(), 64); err == nil {
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// Do something useful with longitude.
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}
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} else {
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// The metadata label geoip/longitude for some reason, was not set.
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}
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// ...
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```
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## Databases
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The supported databases use city schema such as `City` and `Enterprise`. Other databases types with different schemas are not supported yet.
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You can download a [free and public City database](https://dev.maxmind.com/geoip/geolite2-free-geolocation-data).
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## Syntax
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```txt
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geoip [DBFILE]
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```
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* **DBFILE** the mmdb database file path.
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## Examples
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The following configuration configures the `City` database.
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```txt
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. {
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geoip /opt/geoip2/db/GeoLite2-City.mmdb
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metadata # Note that metadata plugin must be enabled as well.
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}
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```
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## Metadata Labels
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A limited set of fields will be exported as labels, all values are stored using strings **regardless of their underlying value type**, and therefore you may have to convert it back to its original type, note that numeric values are always represented in base 10.
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| Label | Type | Example | Description
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| :----------------------------------- | :-------- | :-------------- | :------------------
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| `geoip/city/name` | `string` | `Cambridge` | Then city name in English language.
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| `geoip/country/code` | `string` | `GB` | Country [ISO 3166-1](https://en.wikipedia.org/wiki/ISO_3166-1) code.
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| `geoip/country/name` | `string` | `United Kingdom` | The country name in English language.
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| `geoip/country/is_in_european_union` | `bool` | `false` | Either `true` or `false`.
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| `geoip/continent/code` | `string` | `EU` | See [Continent codes](#ContinentCodes).
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| `geoip/continent/name` | `string` | `Europe` | The continent name in English language.
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| `geoip/latitude` | `float64` | `52.2242` | Base 10, max available precision.
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| `geoip/longitude` | `float64` | `0.1315` | Base 10, max available precision.
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| `geoip/timezone` | `string` | `Europe/London` | The timezone.
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| `geoip/postalcode` | `string` | `CB4` | The postal code.
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## Continent Codes
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| Value | Continent (EN) |
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| :---- | :------------- |
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| AF | Africa |
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| AN | Antarctica |
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| AS | Asia |
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| EU | Europe |
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| NA | North America |
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| OC | Oceania |
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| SA | South America |
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