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|
{ config, lib, pkgs, ...}:
with lib;
let
cfg = config.services.hadoop;
hadoopConf = "${import ./conf.nix { inherit cfg pkgs lib; }}/";
mkIfNotNull = x: mkIf (x != null) x;
# generic hbase role options
hbaseRoleOption = name: extraOpts: {
enable = mkEnableOption (mdDoc "HBase ${name}");
openFirewall = mkOption {
type = types.bool;
default = false;
description = mdDoc "Open firewall ports for HBase ${name}.";
};
restartIfChanged = mkOption {
type = types.bool;
default = false;
description = mdDoc "Restart ${name} con config change.";
};
extraFlags = mkOption {
type = with types; listOf str;
default = [];
example = literalExpression ''[ "--backup" ]'';
description = mdDoc "Extra flags for the ${name} service.";
};
environment = mkOption {
type = with types; attrsOf str;
default = {};
example = literalExpression ''
{
HBASE_MASTER_OPTS = "-Dcom.sun.management.jmxremote.ssl=true";
}
'';
description = mdDoc "Environment variables passed to ${name}.";
};
} // extraOpts;
# generic hbase role configs
hbaseRoleConfig = name: ports: (mkIf cfg.hbase."${name}".enable {
services.hadoop.gatewayRole = {
enable = true;
enableHbaseCli = mkDefault true;
};
systemd.services."hbase-${toLower name}" = {
description = "HBase ${name}";
wantedBy = [ "multi-user.target" ];
path = with cfg; [ hbase.package ] ++ optional
(with cfg.hbase.master; enable && initHDFS) package;
preStart = mkIf (with cfg.hbase.master; enable && initHDFS)
(concatStringsSep "\n" (
map (x: "HADOOP_USER_NAME=hdfs hdfs --config /etc/hadoop-conf ${x}")[
"dfsadmin -safemode wait"
"dfs -mkdir -p ${cfg.hbase.rootdir}"
"dfs -chown hbase ${cfg.hbase.rootdir}"
]
));
inherit (cfg.hbase."${name}") environment;
script = concatStringsSep " " (
[
"hbase --config /etc/hadoop-conf/"
"${toLower name} start"
]
++ cfg.hbase."${name}".extraFlags
++ map (x: "--${toLower x} ${toString cfg.hbase.${name}.${x}}")
(filter (x: hasAttr x cfg.hbase.${name}) ["port" "infoPort"])
);
serviceConfig = {
User = "hbase";
SyslogIdentifier = "hbase-${toLower name}";
Restart = "always";
};
};
services.hadoop.hbaseSiteInternal."hbase.rootdir" = cfg.hbase.rootdir;
networking = {
firewall.allowedTCPPorts = mkIf cfg.hbase."${name}".openFirewall ports;
hosts = mkIf (with cfg.hbase.regionServer; enable && overrideHosts) {
"127.0.0.2" = mkForce [ ];
"::1" = mkForce [ ];
};
};
});
in
{
options.services.hadoop = {
gatewayRole.enableHbaseCli = mkEnableOption (mdDoc "HBase CLI tools");
hbaseSiteDefault = mkOption {
default = {
"hbase.regionserver.ipc.address" = "0.0.0.0";
"hbase.master.ipc.address" = "0.0.0.0";
"hbase.master.info.bindAddress" = "0.0.0.0";
"hbase.regionserver.info.bindAddress" = "0.0.0.0";
"hbase.cluster.distributed" = "true";
};
type = types.attrsOf types.anything;
description = mdDoc ''
Default options for hbase-site.xml
'';
};
hbaseSite = mkOption {
default = {};
type = with types; attrsOf anything;
example = literalExpression ''
{
"hbase.hregion.max.filesize" = 20*1024*1024*1024;
"hbase.table.normalization.enabled" = "true";
}
'';
description = mdDoc ''
Additional options and overrides for hbase-site.xml
<https://github.com/apache/hbase/blob/rel/2.4.11/hbase-common/src/main/resources/hbase-default.xml>
'';
};
hbaseSiteInternal = mkOption {
default = {};
type = with types; attrsOf anything;
internal = true;
description = mdDoc ''
Internal option to add configs to hbase-site.xml based on module options
'';
};
hbase = {
package = mkPackageOption pkgs "hbase" { };
rootdir = mkOption {
description = mdDoc ''
This option will set "hbase.rootdir" in hbase-site.xml and determine
the directory shared by region servers and into which HBase persists.
The URL should be 'fully-qualified' to include the filesystem scheme.
If a core-site.xml is provided, the FS scheme defaults to the value
of "fs.defaultFS".
Filesystems other than HDFS (like S3, QFS, Swift) are also supported.
'';
type = types.str;
example = "hdfs://nameservice1/hbase";
default = "/hbase";
};
zookeeperQuorum = mkOption {
description = mdDoc ''
This option will set "hbase.zookeeper.quorum" in hbase-site.xml.
Comma separated list of servers in the ZooKeeper ensemble.
'';
type = with types; nullOr commas;
example = "zk1.internal,zk2.internal,zk3.internal";
default = null;
};
} // (let
ports = port: infoPort: {
port = mkOption {
type = types.int;
default = port;
description = mdDoc "RPC port";
};
infoPort = mkOption {
type = types.int;
default = infoPort;
description = mdDoc "web UI port";
};
};
in mapAttrs hbaseRoleOption {
master.initHDFS = mkEnableOption (mdDoc "initialization of the hbase directory on HDFS");
regionServer.overrideHosts = mkOption {
type = types.bool;
default = true;
description = mdDoc ''
Remove /etc/hosts entries for "127.0.0.2" and "::1" defined in nixos/modules/config/networking.nix
Regionservers must be able to resolve their hostnames to their IP addresses, through PTR records
or /etc/hosts entries.
'';
};
thrift = ports 9090 9095;
rest = ports 8080 8085;
});
};
config = mkMerge ([
(mkIf cfg.gatewayRole.enable {
environment.systemPackages = mkIf cfg.gatewayRole.enableHbaseCli [ cfg.hbase.package ];
services.hadoop.hbaseSiteInternal = with cfg.hbase; {
"hbase.zookeeper.quorum" = mkIfNotNull zookeeperQuorum;
};
users.users.hbase = {
description = "Hadoop HBase user";
group = "hadoop";
isSystemUser = true;
};
})
] ++ (mapAttrsToList hbaseRoleConfig {
master = [ 16000 16010 ];
regionServer = [ 16020 16030 ];
thrift = with cfg.hbase.thrift; [ port infoPort ];
rest = with cfg.hbase.rest; [ port infoPort ];
}));
}
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