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{ config, lib, ... }:
let
inherit (lib.attrsets) hasAttr;
inherit (lib.modules) mkDefault mkIf;
inherit (lib.options) mkEnableOption mkOption;
inherit (lib.types) nullOr strMatching;
options.services.tsmBackup = {
enable = mkEnableOption ''
automatic backups with the
IBM Spectrum Protect (Tivoli Storage Manager, TSM) client.
This also enables
<option>programs.tsmClient.enable</option>
'';
command = mkOption {
type = strMatching ".+";
default = "backup";
example = "incr";
description = ''
The actual command passed to the
<literal>dsmc</literal> executable to start the backup.
'';
};
servername = mkOption {
type = strMatching ".+";
example = "mainTsmServer";
description = ''
Create a systemd system service
<literal>tsm-backup.service</literal> that starts
a backup based on the given servername's stanza.
Note that this server's
<option>passwdDir</option> will default to
<filename>/var/lib/tsm-backup/password</filename>
(but may be overridden);
also, the service will use
<filename>/var/lib/tsm-backup</filename> as
<literal>HOME</literal> when calling
<literal>dsmc</literal>.
'';
};
autoTime = mkOption {
type = nullOr (strMatching ".+");
default = null;
example = "12:00";
description = ''
The backup service will be invoked
automatically at the given date/time,
which must be in the format described in
<citerefentry><refentrytitle>systemd.time</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
The default <literal>null</literal>
disables automatic backups.
'';
};
};
cfg = config.services.tsmBackup;
cfgPrg = config.programs.tsmClient;
assertions = [
{
assertion = hasAttr cfg.servername cfgPrg.servers;
message = "TSM service servername not found in list of servers";
}
{
assertion = cfgPrg.servers.${cfg.servername}.genPasswd;
message = "TSM service requires automatic password generation";
}
];
in
{
inherit options;
config = mkIf cfg.enable {
inherit assertions;
programs.tsmClient.enable = true;
programs.tsmClient.servers."${cfg.servername}".passwdDir =
mkDefault "/var/lib/tsm-backup/password";
systemd.services.tsm-backup = {
description = "IBM Spectrum Protect (Tivoli Storage Manager) Backup";
# DSM_LOG needs a trailing slash to have it treated as a directory.
# `/var/log` would be littered with TSM log files otherwise.
environment.DSM_LOG = "/var/log/tsm-backup/";
# TSM needs a HOME dir to store certificates.
environment.HOME = "/var/lib/tsm-backup";
# for exit status description see
# https://www.ibm.com/support/knowledgecenter/en/SSEQVQ_8.1.8/client/c_sched_rtncode.html
serviceConfig.SuccessExitStatus = "4 8";
# The `-se` option must come after the command.
# The `-optfile` option suppresses a `dsm.opt`-not-found warning.
serviceConfig.ExecStart =
"${cfgPrg.wrappedPackage}/bin/dsmc ${cfg.command} -se='${cfg.servername}' -optfile=/dev/null";
serviceConfig.LogsDirectory = "tsm-backup";
serviceConfig.StateDirectory = "tsm-backup";
serviceConfig.StateDirectoryMode = "0750";
startAt = mkIf (cfg.autoTime!=null) cfg.autoTime;
};
};
meta.maintainers = [ lib.maintainers.yarny ];
}
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