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nixos/lxd: add recommendedSysctlSettings

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* nixos/lxd: add productionSetup option
* nixos/lxd: enable some settings by default
* nixos/lxd: rename option
This commit is contained in:
mt_caret 2019-12-14 23:29:08 +09:00 committed by Lassulus
parent 9b2b17253a
commit 7358e4f93c
1 changed files with 27 additions and 1 deletions
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28
nixos/modules/virtualisation/lxd.nix
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@ -35,6 +35,18 @@ in
with nixos.
'';
};
recommendedSysctlSettings = mkOption {
type = types.bool;
default = false;
description = ''
enables various settings to avoid common pitfalls when
running containers requiring many file operations.
Fixes errors like "Too many open files" or
"neighbour: ndisc_cache: neighbor table overflow!".
See https://lxd.readthedocs.io/en/latest/production-setup/
for details.
'';
};
};
};
@ -69,8 +81,11 @@ in
ExecStart = "@${pkgs.lxd.bin}/bin/lxd lxd --group lxd";
Type = "simple";
KillMode = "process"; # when stopping, leave the containers alone
LimitMEMLOCK = "infinity";
LimitNOFILE = "1048576";
LimitNPROC = "infinity";
TasksMax = "infinity";
};
};
users.groups.lxd.gid = config.ids.gids.lxd;
@ -79,5 +94,16 @@ in
subUidRanges = [ { startUid = 1000000; count = 65536; } ];
subGidRanges = [ { startGid = 1000000; count = 65536; } ];
};
boot.kernel.sysctl = mkIf cfg.recommendedSysctlSettings {
"fs.inotify.max_queued_events" = 1048576;
"fs.inotify.max_user_instances" = 1048576;
"fs.inotify.max_user_watches" = 1048576;
"vm.max_map_count" = 262144;
"kernel.dmesg_restrict" = 1;
"net.ipv4.neigh.default.gc_thresh3" = 8192;
"net.ipv6.neigh.default.gc_thresh3" = 8192;
"kernel.keys.maxkeys" = 2000;
};
};
}