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nixos/options/custom/settings/storage.nix

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{
config,
lib,
...
}:
with lib; let
cfg = config.custom.settings.storage;
in {
options.custom.settings.storage = {
enable = mkOption {default = false;};
mnt = mkOption {default = [];};
remote = mkOption {default = false;};
};
config = mkIf cfg.enable {
# Enforce permissions for mountpoint directory
systemd.tmpfiles.settings."10-storage" = {
"/mnt/remote" = {
d = {
mode = "0755";
user = "root";
group = "root";
};
};
};
#!! FUSE does not support remount, sometimes causing activation errors on switch
# https://github.com/libfuse/libfuse/issues/717
#?? sudo umount /mnt/remote && sudo mount /mnt/remote
# https://wiki.nixos.org/wiki/SSHFS
# https://man.archlinux.org/man/sshfs.1
fileSystems = let
#?? "/mnt/PATH" = remote "PATH" UID GID "UMASK"
remote = path: uid: gid: umask: {
# https://robot.hetzner.com/storage
device = "u415778@u415778.your-storagebox.de:/home/${path}";
fsType = "sshfs";
options = [
"noatime" # Do not modify access time
"reconnect" # Gracefully handle network issues
"default_permissions" # Check local permissions
"allow_other" # Grant other users access
"umask=${umask}" # Set permissions mask
"uid=${toString uid}" # Set user id
"gid=${toString gid}" # Set group id
"idmap=user" # Map local users to remote
"transform_symlinks" # Convert absolute symlinks to relative
"compression=no" # Save CPU cycles at the cost of transfer speed
"port=23"
"IdentityFile=/etc/ssh/id_ed25519" # !! SSH key configured imperatively
"ServerAliveInterval=15" # Prevent application hangs on reconnect
];
};
in
# Map list of disk labels to /mnt/LABEL with user defaults
mergeAttrsList (forEach cfg.mnt (label: {
"/mnt/${label}" = {
device = "/dev/disk/by-label/${label}";
options = [
"defaults"
"noatime"
"nofail"
"user"
"exec"
"x-gvfs-show"
];
};
}))
// optionalAttrs cfg.remote {
# Use umask to set sshfs permissions
#!! Up to 10 simultaneous connections with Hetzner
#?? docker compose exec CONTAINER cat /etc/passwd
#// "/mnt/remote/conduwuit" = remote "conduwuit" 300 300 "0077"; # conduit:conduit @ 0700
#// "/mnt/remote/nextcloud" = remote "nextcloud" 33 33 "0007"; # www-data:www-data @ 0700
#// "/mnt/remote/syncthing" = remote "syncthing" 237 237 "0077"; # syncthing:syncthing @ 0700
};
};
}