zfs-setup.nix

zfs-setup.nix

{
# configuration.nix

systemd.services.zfs-setup = {
    description = "ZFS Setup";
    after = [ "zfs-import.target" ];
    wants = [ "zfs-import.target" ];
    serviceConfig = {
      Type = "oneshot";
      ExecStart = "${pkgs.writeShellScriptBin "zfs-setup" ''
        LOGFILE=/tmp/zfs-setup.log
        echo "Starting..." >> $LOGFILE 2>&1
        echo "Path to zpool is ${pkgs.zfs}/bin/zpool" >> $LOGFILE 2>&1
        echo "Path to zfs is ${pkgs.zfs}/bin/zfs" >> $LOGFILE 2>&1

        echo "Checking zpool" >> $LOGFILE 2>&1
        if ! ${pkgs.zfs}/bin/zpool list pool-01 >> $LOGFILE 2>&1; then
          ${pkgs.zfs}/bin/zpool create pool-01 /dev/sda /dev/sdb /dev/sdc >> $LOGFILE 2>&1
        fi

        echo "Checking log device" >> $LOGFILE 2>&1
        if ! ${pkgs.zfs}/bin/zpool status pool-01 | grep -q 'log' >> $LOGFILE 2>&1; then
          ${pkgs.zfs}/bin/zpool add pool-01 log /dev/sdd >> $LOGFILE 2>&1
        fi

        echo "Checking cache device" >> $LOGFILE 2>&1
        if ! ${pkgs.zfs}/bin/zpool status pool-01 | grep -q 'cache' >> $LOGFILE 2>&1; then
          ${pkgs.zfs}/bin/zpool add pool-01 cache /dev/sde >> $LOGFILE 2>&1
        fi

        echo "Checking dataset" >> $LOGFILE 2>&1
        if ! ${pkgs.zfs}/bin/zfs list pool-01/apps >> $LOGFILE 2>&1; then
          ${pkgs.zfs}/bin/zfs create pool-01/apps >> $LOGFILE 2>&1
        fi
      ''}";
      RemainAfterExit = true;
      ExecStartPre = "${pkgs.coreutils}/bin/mkdir -p /tmp";
      RootDirectoryStartOnly = true;
    };
    wantedBy = [ "multi-user.target" ];
  };
  
  }