docs/_docs/extensions-and-integrations/zookeeper-ip-finder-ext.adoc

// Licensed to the Apache Software Foundation (ASF) under one or more
// contributor license agreements.  See the NOTICE file distributed with
// this work for additional information regarding copyright ownership.
// The ASF licenses this file to You under the Apache License, Version 2.0
// (the "License"); you may not use this file except in compliance with
// the License.  You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
= ZooKeeper IP Finder Extension

:javaFile: {javaCodeDir}/TcpIpDiscovery.java

NOTE: Not supported in .NET/C#.

Apache Ignite ZooKeeper Ip Finder module provides a TCP Discovery IP Finder that uses a ZooKeeper
directory to locate other Ignite nodes to connect to.

== Install

Depending on how you use Ignite, you can an extension using one of the following methods:

- If you use the binary distribution, move the `ignite-zookeeper-ip-finder-ext` to the `lib` directory before starting the node.
- Add libraries from `ignite-zookeeper-ip-finder-ext` to the classpath of your application.
- Add a module as a Maven dependency to your project.

== Configuration

To set up ZooKeeper IP finder use `TcpDiscoveryZookeeperIpFinder`:

[tabs]
--
tab:XML[]
[source,xml]
----
<bean class="org.apache.ignite.configuration.IgniteConfiguration">
    <property name="discoverySpi">
        <bean class="org.apache.ignite.spi.discovery.tcp.TcpDiscoverySpi">
            <property name="ipFinder">
                <bean class="org.apache.ignite.spi.discovery.tcp.ipfinder.zk.TcpDiscoveryZookeeperIpFinder">
                    <property name="zkConnectionString" value="127.0.0.1:2181"/>
                </bean>
            </property>
        </bean>
    </property>
</bean>
----
tab:Java[]
[source,java]
----
include::{javaFile}[tag=zk,indent=0]
----
tab:C#/.NET[unsupported]
tab:C++[unsupported]
--

The module depends on third-party libraries that use the slf4j facade for logging.
You can set up an underlying logging framework yourself.