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|
{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.services.mongodb;
mongodb = cfg.package;
mongoCnf = cfg: pkgs.writeText "mongodb.conf"
''
net.bindIp: ${cfg.bind_ip}
${optionalString cfg.quiet "systemLog.quiet: true"}
systemLog.destination: syslog
storage.dbPath: ${cfg.dbpath}
${optionalString cfg.enableAuth "security.authorization: enabled"}
${optionalString (cfg.replSetName != "") "replication.replSetName: ${cfg.replSetName}"}
${cfg.extraConfig}
'';
in
{
###### interface
options = {
services.mongodb = {
enable = mkEnableOption "the MongoDB server";
package = mkOption {
default = pkgs.mongodb;
defaultText = literalExpression "pkgs.mongodb";
type = types.package;
description = "
Which MongoDB derivation to use.
";
};
user = mkOption {
type = types.str;
default = "mongodb";
description = "User account under which MongoDB runs";
};
bind_ip = mkOption {
type = types.str;
default = "127.0.0.1";
description = "IP to bind to";
};
quiet = mkOption {
type = types.bool;
default = false;
description = "quieter output";
};
enableAuth = mkOption {
type = types.bool;
default = false;
description = "Enable client authentication. Creates a default superuser with username root!";
};
initialRootPassword = mkOption {
type = types.nullOr types.str;
default = null;
description = "Password for the root user if auth is enabled.";
};
dbpath = mkOption {
type = types.str;
default = "/var/db/mongodb";
description = "Location where MongoDB stores its files";
};
pidFile = mkOption {
type = types.str;
default = "/run/mongodb.pid";
description = "Location of MongoDB pid file";
};
replSetName = mkOption {
type = types.str;
default = "";
description = ''
If this instance is part of a replica set, set its name here.
Otherwise, leave empty to run as single node.
'';
};
extraConfig = mkOption {
type = types.lines;
default = "";
example = ''
storage.journal.enabled: false
'';
description = "MongoDB extra configuration in YAML format";
};
initialScript = mkOption {
type = types.nullOr types.path;
default = null;
description = ''
A file containing MongoDB statements to execute on first startup.
'';
};
};
};
###### implementation
config = mkIf config.services.mongodb.enable {
assertions = [
{ assertion = !cfg.enableAuth || cfg.initialRootPassword != null;
message = "`enableAuth` requires `initialRootPassword` to be set.";
}
];
users.users.mongodb = mkIf (cfg.user == "mongodb")
{ name = "mongodb";
isSystemUser = true;
group = "mongodb";
description = "MongoDB server user";
};
users.groups.mongodb = mkIf (cfg.user == "mongodb") {};
environment.systemPackages = [ mongodb ];
systemd.services.mongodb =
{ description = "MongoDB server";
wantedBy = [ "multi-user.target" ];
after = [ "network.target" ];
serviceConfig = {
ExecStart = "${mongodb}/bin/mongod --config ${mongoCnf cfg} --fork --pidfilepath ${cfg.pidFile}";
User = cfg.user;
PIDFile = cfg.pidFile;
Type = "forking";
TimeoutStartSec=120; # intial creating of journal can take some time
PermissionsStartOnly = true;
};
preStart = let
cfg_ = cfg // { enableAuth = false; bind_ip = "127.0.0.1"; };
in ''
rm ${cfg.dbpath}/mongod.lock || true
if ! test -e ${cfg.dbpath}; then
install -d -m0700 -o ${cfg.user} ${cfg.dbpath}
# See postStart!
touch ${cfg.dbpath}/.first_startup
fi
if ! test -e ${cfg.pidFile}; then
install -D -o ${cfg.user} /dev/null ${cfg.pidFile}
fi '' + lib.optionalString cfg.enableAuth ''
if ! test -e "${cfg.dbpath}/.auth_setup_complete"; then
systemd-run --unit=mongodb-for-setup --uid=${cfg.user} ${mongodb}/bin/mongod --config ${mongoCnf cfg_}
# wait for mongodb
while ! ${mongodb}/bin/mongo --eval "db.version()" > /dev/null 2>&1; do sleep 0.1; done
${mongodb}/bin/mongo <<EOF
use admin
db.createUser(
{
user: "root",
pwd: "${cfg.initialRootPassword}",
roles: [
{ role: "userAdminAnyDatabase", db: "admin" },
{ role: "dbAdminAnyDatabase", db: "admin" },
{ role: "readWriteAnyDatabase", db: "admin" }
]
}
)
EOF
touch "${cfg.dbpath}/.auth_setup_complete"
systemctl stop mongodb-for-setup
fi
'';
postStart = ''
if test -e "${cfg.dbpath}/.first_startup"; then
${optionalString (cfg.initialScript != null) ''
${mongodb}/bin/mongo ${optionalString (cfg.enableAuth) "-u root -p ${cfg.initialRootPassword}"} admin "${cfg.initialScript}"
''}
rm -f "${cfg.dbpath}/.first_startup"
fi
'';
};
};
}
|