Clickhouse warnings about <listen_host>

[rmens]

After upgrading to clickhouse/clickhouse-server:24.3.3.102-alpine there's a lot more warnings in the logs. It seems to relate to the <listen_host> but I'm not sure what to do.

root@statstestbk:~/hosting-master# docker logs hosting-master_plausible_events_db_1
ClickHouse Database directory appears to contain a database; Skipping initialization
Processing configuration file '/etc/clickhouse-server/config.xml'.
Merging configuration file '/etc/clickhouse-server/config.d/docker_related_config.xml'.
Merging configuration file '/etc/clickhouse-server/config.d/logging.xml'.
Logging warning to /var/log/clickhouse-server/clickhouse-server.log
Logging errors to /var/log/clickhouse-server/clickhouse-server.err.log
2024.06.16 17:43:20.598839 [ 1 ] {} <Warning> Application: Listen [::]:9009 failed: Poco::Exception. Code: 1000, e.code() = 0, DNS error: EAI: Address family for hostname not supported (version 24.3.3.102 (official build)). If it is an IPv6 or IPv4 address and your host has disabled IPv6 or IPv4, then consider to specify not disabled IPv4 or IPv6 address to listen in <listen_host> element of configuration file. Example for disabled IPv6: <listen_host>0.0.0.0</listen_host> . Example for disabled IPv4: <listen_host>::</listen_host>
2024.06.16 17:43:20.897257 [ 1 ] {} <Warning> Application: Listen [::]:8123 failed: Poco::Exception. Code: 1000, e.code() = 0, DNS error: EAI: Address family for hostname not supported (version 24.3.3.102 (official build)). If it is an IPv6 or IPv4 address and your host has disabled IPv6 or IPv4, then consider to specify not disabled IPv4 or IPv6 address to listen in <listen_host> element of configuration file. Example for disabled IPv6: <listen_host>0.0.0.0</listen_host> . Example for disabled IPv4: <listen_host>::</listen_host>
2024.06.16 17:43:20.897614 [ 1 ] {} <Warning> Application: Listen [::]:9000 failed: Poco::Exception. Code: 1000, e.code() = 0, DNS error: EAI: Address family for hostname not supported (version 24.3.3.102 (official build)). If it is an IPv6 or IPv4 address and your host has disabled IPv6 or IPv4, then consider to specify not disabled IPv4 or IPv6 address to listen in <listen_host> element of configuration file. Example for disabled IPv6: <listen_host>0.0.0.0</listen_host> . Example for disabled IPv4: <listen_host>::</listen_host>
2024.06.16 17:43:20.897806 [ 1 ] {} <Warning> Application: Listen [::]:9004 failed: Poco::Exception. Code: 1000, e.code() = 0, DNS error: EAI: Address family for hostname not supported (version 24.3.3.102 (official build)). If it is an IPv6 or IPv4 address and your host has disabled IPv6 or IPv4, then consider to specify not disabled IPv4 or IPv6 address to listen in <listen_host> element of configuration file. Example for disabled IPv6: <listen_host>0.0.0.0</listen_host> . Example for disabled IPv4: <listen_host>::</listen_host>
2024.06.16 17:43:20.897951 [ 1 ] {} <Warning> Application: Listen [::]:9005 failed: Poco::Exception. Code: 1000, e.code() = 0, DNS error: EAI: Address family for hostname not supported (version 24.3.3.102 (official build)). If it is an IPv6 or IPv4 address and your host has disabled IPv6 or IPv4, then consider to specify not disabled IPv4 or IPv6 address to listen in <listen_host> element of configuration file. Example for disabled IPv6: <listen_host>0.0.0.0</listen_host> . Example for disabled IPv4: <listen_host>::</listen_host>

[ruslandoga]

👋 @rmens

These logs have been present in all ClickHouse versions I ever used, it's not unique to 24.3.3.102-alpine. They can be ignored, all they say is that IPv6 is not available. IPv6 is usually isn't in available in Docker containers by default and requires extra setup: https://docs.docker.com/config/daemon/ipv6/

[rmens]

Okay that makes sense. Since IPv6 is usually not available in Docker this turned out to be a pretty easy fix to have Clickhouse only listen on IPv4. I submitted a pull request.