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- add a performance-tuned media/containers dataset - store Docker and NixOS container state on the dataset - prepare storage directories after ZFS mounts - bind NixOS container state to its required path - configure snapshot retention for container storage
72 lines
1.8 KiB
Nix
72 lines
1.8 KiB
Nix
{ pkgs, ... }:
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let
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vars = import ./vars.nix;
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in
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{
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virtualisation.docker.daemon.settings."data-root" = "${vars.containers}/docker";
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# nixos-container hardcodes its state directory to /var/lib/nixos-containers,
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# so route it to the shared container dataset with a bind mount.
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fileSystems."/var/lib/nixos-containers" = {
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device = "${vars.containers}/nixos-containers";
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fsType = "none";
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options = [ "bind" ];
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};
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systemd.services = {
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prepare-docker-storage = {
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description = "Create Docker storage directory";
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requiredBy = [ "docker.service" ];
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before = [ "docker.service" ];
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requires = [ "zfs-mount.service" ];
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after = [ "zfs-mount.service" ];
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path = [
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pkgs.coreutils
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pkgs.util-linux
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];
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unitConfig = {
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DefaultDependencies = false;
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RequiresMountsFor = [ "/nix" ];
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};
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serviceConfig = {
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Type = "oneshot";
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RemainAfterExit = true;
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};
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script = ''
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mountpoint -q ${vars.containers}
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install -d -m 0710 ${vars.containers}/docker
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'';
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};
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prepare-nixos-container-storage = {
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description = "Create NixOS container storage directory";
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requiredBy = [ "var-lib-nixos\\x2dcontainers.mount" ];
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before = [ "var-lib-nixos\\x2dcontainers.mount" ];
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requires = [ "zfs-mount.service" ];
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after = [ "zfs-mount.service" ];
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path = [
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pkgs.coreutils
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pkgs.util-linux
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];
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unitConfig = {
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DefaultDependencies = false;
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RequiresMountsFor = [ "/nix" ];
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};
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serviceConfig = {
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Type = "oneshot";
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RemainAfterExit = true;
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};
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script = ''
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mountpoint -q ${vars.containers}
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install -d -m 0755 ${vars.containers}/nixos-containers
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'';
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};
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};
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}
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