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|
{ config, lib, pkgs, ...}:
let
cfg = config.services.hadoop;
hadoopConf = import ./conf.nix { hadoop = cfg; pkgs = pkgs; };
in
with lib;
{
options.services.hadoop.hdfs = {
namenode.enabled = mkOption {
type = types.bool;
default = false;
description = ''
Whether to run the Hadoop YARN NameNode
'';
};
datanode.enabled = mkOption {
type = types.bool;
default = false;
description = ''
Whether to run the Hadoop YARN DataNode
'';
};
};
config = mkMerge [
(mkIf cfg.hdfs.namenode.enabled {
systemd.services."hdfs-namenode" = {
description = "Hadoop HDFS NameNode";
wantedBy = [ "multi-user.target" ];
environment = {
HADOOP_HOME = "${cfg.package}";
};
preStart = ''
${cfg.package}/bin/hdfs --config ${hadoopConf} namenode -format -nonInteractive || true
'';
serviceConfig = {
User = "hdfs";
SyslogIdentifier = "hdfs-namenode";
ExecStart = "${cfg.package}/bin/hdfs --config ${hadoopConf} namenode";
};
};
})
(mkIf cfg.hdfs.datanode.enabled {
systemd.services."hdfs-datanode" = {
description = "Hadoop HDFS DataNode";
wantedBy = [ "multi-user.target" ];
environment = {
HADOOP_HOME = "${cfg.package}";
};
serviceConfig = {
User = "hdfs";
SyslogIdentifier = "hdfs-datanode";
ExecStart = "${cfg.package}/bin/hdfs --config ${hadoopConf} datanode";
};
};
})
(mkIf (
cfg.hdfs.namenode.enabled || cfg.hdfs.datanode.enabled
) {
users.users.hdfs = {
description = "Hadoop HDFS user";
group = "hadoop";
uid = config.ids.uids.hdfs;
};
})
];
}
|