+++ /dev/null
-{ lib, pkgs, config, ... }:
-let
- partModule = lib.types.submodule {
- options = {
- remote_folder = lib.mkOption {
- type = lib.types.path;
- description = ''
- Path to backup
- '';
- };
- exclude_from = lib.mkOption {
- type = lib.types.listOf lib.types.path;
- default = [];
- description = ''
- Paths to exclude from the backup
- '';
- };
- files_from = lib.mkOption {
- type = lib.types.listOf lib.types.path;
- default = [];
- description = ''
- Paths to take for the backup
- (if empty: whole folder minus exclude_from)
- '';
- };
- args = lib.mkOption {
- type = lib.types.nullOr lib.types.str;
- default = null;
- description = ''
- additional arguments for rsync
- '';
- };
- };
- };
- profileModule = lib.types.submodule {
- options = {
- keep = lib.mkOption {
- type = lib.types.int;
- default = 7;
- description = ''
- Number of backups to keep
- '';
- };
- check_command = lib.mkOption {
- type = lib.types.str;
- default = "backup";
- description = ''
- command to check if backup needs to be done
- '';
- };
- login = lib.mkOption {
- type = lib.types.str;
- description = ''
- login to connect to
- '';
- };
- host = lib.mkOption {
- type = lib.types.str;
- description = ''
- host to connect to
- '';
- };
- port = lib.mkOption {
- type = lib.types.str;
- default = "22";
- description = ''
- port to connect to
- '';
- };
- host_key = lib.mkOption {
- type = lib.types.str;
- description = ''
- Host key to use as known host
- '';
- };
- host_key_type = lib.mkOption {
- type = lib.types.str;
- description = ''
- Host key type
- '';
- };
- parts = lib.mkOption {
- type = lib.types.attrsOf partModule;
- description = ''
- folders to backup in the host
- '';
- };
- };
- };
- cfg = config.services.rsyncBackup;
-
- ssh_key = config.secrets.fullPaths."rsync_backup/identity";
-
- backup_head = ''
- #!${pkgs.stdenv.shell}
- EXCL_FROM=`mktemp`
- FILES_FROM=`mktemp`
- TMP_STDERR=`mktemp`
-
- on_exit() {
- if [ -s "$TMP_STDERR" ]; then
- cat "$TMP_STDERR"
- fi
- rm -f $TMP_STDERR $EXCL_FROM $FILES_FROM
- }
-
- trap "on_exit" EXIT
-
- exec 2> "$TMP_STDERR"
- exec < /dev/null
-
- set -e
- '';
-
- backup_profile = name: profile: builtins.concatStringsSep "\n" (
- [(backup_profile_head name profile)]
- ++ lib.mapAttrsToList (backup_part name) profile.parts
- ++ [(backup_profile_tail name profile)]);
-
- backup_profile_head = name: profile: ''
- ##### ${name} #####
- PORT="${profile.port}"
- DEST="${profile.login}@${profile.host}"
- BASE="${cfg.mountpoint}/${name}"
- OLD_BAK_BASE=$BASE/older/j
- BAK_BASE=''${OLD_BAK_BASE}0
- RSYNC_OUTPUT=$BASE/rsync_output
- NBR=${builtins.toString profile.keep}
-
- if ! ssh \
- -o PreferredAuthentications=publickey \
- -o StrictHostKeyChecking=yes \
- -o ClearAllForwardings=yes \
- -o UserKnownHostsFile=/dev/null \
- -o CheckHostIP=no \
- -p $PORT \
- -i ${ssh_key} \
- $DEST ${profile.check_command}; then
- echo "Fichier de verrouillage backup sur $DEST ou impossible de se connecter" >&2
- skip=$DEST
- fi
-
- rm -rf ''${OLD_BAK_BASE}''${NBR}
- for j in `seq -w $(($NBR-1)) -1 0`; do
- [ ! -d ''${OLD_BAK_BASE}$j ] && continue
- mv ''${OLD_BAK_BASE}$j ''${OLD_BAK_BASE}$(($j+1))
- done
- mkdir $BAK_BASE
- mv $RSYNC_OUTPUT $BAK_BASE
- mkdir $RSYNC_OUTPUT
-
- if [ "$skip" != "$DEST" ]; then
- '';
-
- backup_profile_tail = name: profile: ''
- ssh -o UserKnownHostsFile=/dev/null -o CheckHostIP=no -i ${ssh_key} -p $PORT $DEST sh -c "date > .cache/last_backup"
- fi # [ "$skip" != "$DEST" ]
- ##### End ${name} #####
- '';
-
- backup_part = profile_name: part_name: part: ''
- ### ${profile_name} ${part_name} ###
- LOCAL="${part_name}"
- REMOTE="${part.remote_folder}"
-
- if [ ! -d "$BASE/$LOCAL" ]; then
- mkdir $BASE/$LOCAL
- fi
- cd $BASE/$LOCAL
- cat > $EXCL_FROM <<EOF
- ${builtins.concatStringsSep "\n" part.exclude_from}
- EOF
- cat > $FILES_FROM <<EOF
- ${builtins.concatStringsSep "\n" part.files_from}
- EOF
-
- OUT=$RSYNC_OUTPUT/$LOCAL
- ${pkgs.rsync}/bin/rsync --new-compress -XAavbr --fake-super -e "ssh -o UserKnownHostsFile=/dev/null -o CheckHostIP=no -i ${ssh_key} -p $PORT" --numeric-ids --delete \
- --backup-dir=$BAK_BASE/$LOCAL \${
- lib.optionalString (part.args != null) "\n ${part.args} \\"}${
- lib.optionalString (builtins.length part.exclude_from > 0) "\n --exclude-from=$EXCL_FROM \\"}${
- lib.optionalString (builtins.length part.files_from > 0) "\n --files-from=$FILES_FROM \\"}
- $DEST:$REMOTE . > $OUT || true
- ### End ${profile_name} ${part_name} ###
- '';
-in
-{
- options.services.rsyncBackup = {
- mountpoint = lib.mkOption {
- type = lib.types.path;
- description = "Path to the base folder for backups";
- };
- profiles = lib.mkOption {
- type = lib.types.attrsOf profileModule;
- default = {};
- description = ''
- Profiles to backup
- '';
- };
- ssh_key_public = lib.mkOption {
- type = lib.types.str;
- description = "Public key for the backup";
- };
- ssh_key_private = lib.mkOption {
- type = lib.types.str;
- description = "Private key for the backup";
- };
- };
-
- config = lib.mkIf (builtins.length (builtins.attrNames cfg.profiles) > 0) {
- users.users.backup = {
- isSystemUser = true;
- uid = config.ids.uids.backup;
- group = "backup";
- extraGroups = [ "keys" ];
- };
-
- users.groups.backup = {
- gid = config.ids.gids.backup;
- };
-
- services.cron.systemCronJobs = let
- backup = pkgs.writeScript "backup.sh" (builtins.concatStringsSep "\n" ([
- backup_head
- ] ++ lib.mapAttrsToList backup_profile cfg.profiles));
- in [
- ''
- 25 3,15 * * * backup ${backup}
- ''
- ];
-
- programs.ssh.knownHosts = lib.attrsets.mapAttrs' (name: profile: lib.attrsets.nameValuePair name {
- hostNames = [ profile.host ];
- publicKey = "${profile.host_key_type} ${profile.host_key}";
- }) cfg.profiles;
-
- system.activationScripts.rsyncBackup = {
- deps = [ "users" ];
- text = builtins.concatStringsSep "\n" (map (v: ''
- install -m 0700 -o backup -g backup -d ${cfg.mountpoint}/${v} ${cfg.mountpoint}/${v}/older ${cfg.mountpoint}/${v}/rsync_output
- '') (builtins.attrNames cfg.profiles)
- );
- };
-
- secrets.keys = [
- {
- dest = "rsync_backup/identity";
- user = "backup";
- group = "backup";
- permissions = "0400";
- text = cfg.ssh_key_private;
- }
- {
- dest = "rsync_backup/identity.pub";
- user = "backup";
- group = "backup";
- permissions = "0444";
- text = cfg.ssh_key_public;
- }
- ];
- };
-}
projects / perso / Immae / Config / Nix.git / blobdiff