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{ config, lib, pkgs, ... }:
let
cfg = config.services.clickhouse;
confDir = "/etc/clickhouse-server";
stateDir = "/var/lib/clickhouse";
in
with lib;
{
###### interface
options = {
services.clickhouse = {
enable = mkOption {
default = false;
description = "Whether to enable ClickHouse database server.";
};
};
};
###### implementation
config = mkIf cfg.enable {
users.users.clickhouse = {
name = "clickhouse";
uid = config.ids.uids.clickhouse;
group = "clickhouse";
description = "ClickHouse server user";
};
users.groups.clickhouse.gid = config.ids.gids.clickhouse;
systemd.services.clickhouse = {
description = "ClickHouse server";
wantedBy = [ "multi-user.target" ];
after = [ "network.target" ];
preStart = ''
mkdir -p ${stateDir}
chown clickhouse:clickhouse ${confDir} ${stateDir}
'';
script = ''
cd "${confDir}"
exec ${pkgs.clickhouse}/bin/clickhouse-server
'';
serviceConfig = {
User = "clickhouse";
Group = "clickhouse";
PermissionsStartOnly = true;
};
};
environment.etc = {
"clickhouse-server/config.xml" = {
source = "${pkgs.clickhouse}/etc/clickhouse-server/config.xml";
};
"clickhouse-server/users.xml" = {
source = "${pkgs.clickhouse}/etc/clickhouse-server/users.xml";
};
};
environment.systemPackages = [ pkgs.clickhouse ];
# startup requires a `/etc/localtime` which only if exists if `time.timeZone != null`
time.timeZone = mkDefault "UTC";
};
}
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