ClickHouse多集群配置

<zookeeper>
    <node index="1">
        <host>zk1</host>
        <port>2181</port>
    </node>
    <node index="2">
        <host>zk2</host>
        <port>2181</port>
    </node>
    <node index="3">
        <host>zk3</host>
        <port>2181</port>
    </node>
</zookeeper>

<remote_servers>
    <ck_cluster>
        <shard>
            <weight>1</weight>
            <internal_replication>true</internal_replication>
            <replica>
                <host>ck1</host>
                <port>9000</port>
            </replica>
            <replica>
                <host>ck2</host>
                <port>9000</port>
            </replica>
        </shard>
        <shard>
            <weight>1</weight>
            <internal_replication>true</internal_replication>
            <replica>
                <host>ck2</host>
                <port>9000</port>
            </replica>
            <replica>
                <host>ck3</host>
                <port>9000</port>
            </replica>
        </shard>
        <shard>
            <weight>1</weight>
            <internal_replication>true</internal_replication>
            <replica>
                <host>ck3</host>
                <port>9000</port>
            </replica>
            <replica>
                <host>ck1</host>
                <port>9000</port>
            </replica>
        </shard>
    </ck_cluster>
</remote_servers>

删除以上两个配置信息，新增以下内容

<remote_servers incl="clickhouse_remote_servers" />
<zookeeper incl="zookeeper-servers" optional="true" />

<include_from>/etc/clickhouse-server/ck-cluster.xml</include_from>

remote_servers 标志我们在外部文件中引用的集群配置节点是clickhouse_remote_servers
zookeeper 标志我们在外部文件引用的ZK集群配置节点是zookeeper-servers
include_from 标志我们引用的外部配置文件，指定文件的绝对路径

新建集群配置文件

刚刚我们指定了/etc/clickhouse-server/ck-cluster.xml配置文件，此时我们需要去对该文件做配置

创建新的配置文件

touch /etc/clickhouse-server/ck-cluster.xml

在新的配置文件中增加zookeeper和clickhouse集群信息

<yandex>
    <zookeeper-servers>
        <node index="1">
            <host>zk1</host>
            <port>2181</port>
        </node>
        <node index="2">
            <host>zk2</host>
            <port>2181</port>
        </node>
        <node index="3">
            <host>zk3</host>
            <port>2181</port>
        </node>
    </zookeeper-servers>
    
    <clickhouse_remote_servers>
        <ck_cluster>
            <shard_1>
                <weight>1</weight>
                <internal_replication>true</internal_replication>
                <replica>
                    <host>ck1</host>
                    <port>9000</port>
                </replica>
                <replica>
                    <host>ck2</host>
                    <port>9000</port>
                </replica>
            </shard_1>
            <shard_2>
                <weight>1</weight>
                <internal_replication>true</internal_replication>
                <replica>
                    <host>ck2</host>
                    <port>9000</port>
                </replica>
                <replica>
                    <host>ck3</host>
                    <port>9000</port>
                </replica>
            </shard_2>
            <shard_3>
                <weight>1</weight>
                <internal_replication>true</internal_replication>
                <replica>
                    <host>ck3</host>
                    <port>9000</port>
                </replica>
                <replica>
                    <host>ck1</host>
                    <port>9000</port>
                </replica>
            </shard_3>
        </ck_cluster>
    </clickhouse_remote_servers> 

    <networks>
        <ip>::/0</ip>
    </networks>
</yandex>

此处需要注意的是在yandex中配置的相关节点一定到和config.xml中的<remote_servers incl="clickhouse_remote_servers" /> <zookeeper incl="zookeeper-servers" optional="true" />这两个属性的incl一致，否则会扫描不到集群标志修改配置后我们不需要重启服务，ClickHouse会自动加载修改后的配置信息我们配置多个集群使用多个配置文件即可，多个replica节点配置多个也是可以的

目录

修改集群配置

新建集群配置文件