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Update doctest client with latest v4 release (#2844)

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Shaya Potter
2024-09-29 13:19:06 +03:00
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docs/clustering.md
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@@ -35,35 +35,70 @@ const value = await cluster.get('key');
| rootNodes | | An array of root nodes that are part of the cluster, which will be used to get the cluster topology. Each element in the array is a client configuration object. There is no need to specify every node in the cluster, 3 should be enough to reliably connect and obtain the cluster configuration from the server |
| defaults | | The default configuration values for every client in the cluster. Use this for example when specifying an ACL user to connect with |
| useReplicas | `false` | When `true`, distribute load by executing readonly commands (such as `GET`, `GEOSEARCH`, etc.) across all cluster nodes. When `false`, only use master nodes |
| minimizeConnections | `false` | When `true`, `.connect()` will only discover the cluster topology, without actually connecting to all the nodes. Useful for short-term or Pub/Sub-only connections. |
| maxCommandRedirections | `16` | The maximum number of times a command will be redirected due to `MOVED` or `ASK` errors |
| nodeAddressMap | | Defines the [node address mapping](#node-address-map) |
| modules | | Included [Redis Modules](../README.md#packages) |
| scripts | | Script definitions (see [Lua Scripts](../README.md#lua-scripts)) |
| functions | | Function definitions (see [Functions](../README.md#functions)) |
## Auth with password and username
## Node Address Map
A node address map is required when a Redis cluster is configured with addresses that are inaccessible by the machine running the Redis client.
This is a mapping of addresses and ports, with the values being the accessible address/port combination. Example:
Specifying the password in the URL or a root node will only affect the connection to that specific node. In case you want to set the password for all the connections being created from a cluster instance, use the `defaults` option.
```javascript
createCluster({
rootNodes: [{
url: 'external-host-1.io:30001'
url: 'redis://10.0.0.1:30001'
}, {
url: 'external-host-2.io:30002'
url: 'redis://10.0.0.2:30002'
}],
defaults: {
username: 'username',
password: 'password'
}
});
```
## Node Address Map
A mapping between the addresses in the cluster (see `CLUSTER SHARDS`) and the addresses the client should connect to.
Useful when the cluster is running on a different network to the client.
```javascript
const rootNodes = [{
url: 'external-host-1.io:30001'
}, {
url: 'external-host-2.io:30002'
}];
// Use either a static mapping:
createCluster({
rootNodes,
nodeAddressMap: {
'10.0.0.1:30001': {
host: 'external-host-1.io',
host: 'external-host.io',
port: 30001
},
'10.0.0.2:30002': {
host: 'external-host-2.io',
host: 'external-host.io',
port: 30002
}
}
});
// or create the mapping dynamically, as a function:
createCluster({
rootNodes,
nodeAddressMap(address) {
const indexOfDash = address.lastIndexOf('-'),
indexOfDot = address.indexOf('.', indexOfDash),
indexOfColons = address.indexOf(':', indexOfDot);
return {
host: `external-host-${address.substring(indexOfDash + 1, indexOfDot)}.io`,
port: Number(address.substring(indexOfColons + 1))
};
}
});
```
> This is a common problem when using ElastiCache. See [Accessing ElastiCache from outside AWS](https://docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/accessing-elasticache.html) for more information on that.