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|
{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.services.mesos.slave;
mkAttributes =
attrs: concatStringsSep ";" (mapAttrsToList
(k: v: "${k}:${v}")
(filterAttrs (k: v: v != null) attrs));
attribsArg = optionalString (cfg.attributes != {})
"--attributes=${mkAttributes cfg.attributes}";
containerizersArg = concatStringsSep "," (
lib.unique (
cfg.containerizers ++ (optional cfg.withDocker "docker")
)
);
imageProvidersArg = concatStringsSep "," (
lib.unique (
cfg.imageProviders ++ (optional cfg.withDocker "docker")
)
);
isolationArg = concatStringsSep "," (
lib.unique (
cfg.isolation ++ (optionals cfg.withDocker [ "filesystem/linux" "docker/runtime"])
)
);
in {
options.services.mesos = {
slave = {
enable = mkOption {
description = "Whether to enable the Mesos Slave.";
default = false;
type = types.bool;
};
ip = mkOption {
description = "IP address to listen on.";
default = "0.0.0.0";
type = types.str;
};
port = mkOption {
description = "Port to listen on.";
default = 5051;
type = types.int;
};
advertiseIp = mkOption {
description = "IP address advertised to reach this agent.";
default = null;
type = types.nullOr types.str;
};
advertisePort = mkOption {
description = "Port advertised to reach this agent.";
default = null;
type = types.nullOr types.int;
};
containerizers = mkOption {
description = ''
List of containerizer implementations to compose in order to provide
containerization. Available options are mesos and docker.
The order the containerizers are specified is the order they are tried.
'';
default = [ "mesos" ];
type = types.listOf types.str;
};
imageProviders = mkOption {
description = "List of supported image providers, e.g., APPC,DOCKER.";
default = [ ];
type = types.listOf types.str;
};
imageProvisionerBackend = mkOption {
description = ''
Strategy for provisioning container rootfs from images,
e.g., aufs, bind, copy, overlay.
'';
default = "copy";
type = types.str;
};
isolation = mkOption {
description = ''
Isolation mechanisms to use, e.g., posix/cpu,posix/mem, or
cgroups/cpu,cgroups/mem, or network/port_mapping, or `gpu/nvidia` for nvidia
specific gpu isolation.
'';
default = [ "posix/cpu" "posix/mem" ];
type = types.listOf types.str;
};
master = mkOption {
description = ''
May be one of:
zk://host1:port1,host2:port2,.../path
zk://username:password@host1:port1,host2:port2,.../path
'';
type = types.str;
};
withHadoop = mkOption {
description = "Add the HADOOP_HOME to the slave.";
default = false;
type = types.bool;
};
withDocker = mkOption {
description = "Enable the docker containerizer.";
default = config.virtualisation.docker.enable;
type = types.bool;
};
dockerRegistry = mkOption {
description = ''
The default url for pulling Docker images.
It could either be a Docker registry server url,
or a local path in which Docker image archives are stored.
'';
default = null;
type = types.nullOr (types.either types.str types.path);
};
workDir = mkOption {
description = "The Mesos work directory.";
default = "/var/lib/mesos/slave";
type = types.str;
};
extraCmdLineOptions = mkOption {
description = ''
Extra command line options for Mesos Slave.
See https://mesos.apache.org/documentation/latest/configuration/
'';
default = [ "" ];
type = types.listOf types.str;
example = [ "--gc_delay=3days" ];
};
logLevel = mkOption {
description = ''
The logging level used. Possible values:
'INFO', 'WARNING', 'ERROR'
'';
default = "INFO";
type = types.str;
};
attributes = mkOption {
description = ''
Machine attributes for the slave instance.
Use caution when changing this; you may need to manually reset slave
metadata before the slave can re-register.
'';
default = {};
type = types.attrsOf types.str;
example = { rack = "aa";
host = "aabc123";
os = "nixos"; };
};
executorEnvironmentVariables = mkOption {
description = ''
The environment variables that should be passed to the executor, and thus subsequently task(s).
'';
default = {
PATH = "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin";
};
type = types.attrsOf types.str;
};
};
};
config = mkIf cfg.enable {
systemd.tmpfiles.rules = [
"d '${cfg.workDir}' 0701 - - - -"
];
systemd.services.mesos-slave = {
description = "Mesos Slave";
wantedBy = [ "multi-user.target" ];
after = [ "network.target" ] ++ optionals cfg.withDocker [ "docker.service" ] ;
path = [ pkgs.runtimeShellPackage ];
serviceConfig = {
ExecStart = ''
${pkgs.mesos}/bin/mesos-slave \
--containerizers=${containerizersArg} \
--image_providers=${imageProvidersArg} \
--image_provisioner_backend=${cfg.imageProvisionerBackend} \
--isolation=${isolationArg} \
--ip=${cfg.ip} \
--port=${toString cfg.port} \
${optionalString (cfg.advertiseIp != null) "--advertise_ip=${cfg.advertiseIp}"} \
${optionalString (cfg.advertisePort != null) "--advertise_port=${toString cfg.advertisePort}"} \
--master=${cfg.master} \
--work_dir=${cfg.workDir} \
--logging_level=${cfg.logLevel} \
${attribsArg} \
${optionalString cfg.withHadoop "--hadoop-home=${pkgs.hadoop}"} \
${optionalString cfg.withDocker "--docker=${pkgs.docker}/libexec/docker/docker"} \
${optionalString (cfg.dockerRegistry != null) "--docker_registry=${cfg.dockerRegistry}"} \
--executor_environment_variables=${lib.escapeShellArg (builtins.toJSON cfg.executorEnvironmentVariables)} \
${toString cfg.extraCmdLineOptions}
'';
};
};
};
}
|