FQDNs of ClickHouse® hosts
To connect to a cluster host, you need its fully qualified domain name (FQDN). You can obtain it in one of the following ways:
-
In the management console, copy the command for connecting to the cluster. This command contains the host FQDN. To get the command, go to the cluster page and click Connect.
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Look up the FQDN in the management console:
- Go to the cluster page.
- Go to Hosts.
- Copy the Host FQDN column value.
Cluster hosts also use special FQDNs.
Selecting an available host automatically
To avoid connecting to another host manually if the current one becomes unavailable, use a special FQDN. It can be in one of the following formats:
-
c-<cluster_ID>.rw.mdb.yandexcloud.net: To connect to an available cluster host. -
<shard_name>.c-<cluster_ID>.rw.mdb.yandexcloud.net: To connect to an available shard host.
If the host an FQDN points to becomes unavailable, there may be a slight delay before the FQDN starts pointing to another available host.
Warning
If, during cluster maintenance, a special FQDN points to a host without public access, the cluster will not be available for connection from the internet. To avoid this, enable public access for all cluster hosts.
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