118 lines
3.7 KiB
Nix
118 lines
3.7 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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options.services.backups = {
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enable = mkEnableOption "Backups service";
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with-bulk-data = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Whether to also backup Bitcoin blockchain and other bulk data.
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'';
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};
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destination = mkOption {
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type = types.str;
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default = "file:///var/lib/localBackups";
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description = ''
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Where to back up to.
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'';
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};
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frequency = mkOption {
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type = types.nullOr types.str;
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default = null;
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description = ''
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Run backup with the given frequency. If null, do not run automatically.
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'';
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};
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postgresqlDatabases = mkOption {
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type = types.listOf types.str;
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default = [];
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description = "List of database names to backup.";
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};
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extraFiles = mkOption {
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type = types.listOf types.str;
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default = [];
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example = [ "/var/lib/nginx" ];
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description = "Additional files to be appended to filelist.";
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};
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};
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cfg = config.services.backups;
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# Potential backup file paths are are matched against filelist
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# entries from top to bottom.
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# The first match determines inclusion or exclusion.
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filelist = builtins.toFile "filelist.txt" ''
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${builtins.concatStringsSep "\n" cfg.extraFiles}
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${optionalString (!cfg.with-bulk-data) ''
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- ${config.services.bitcoind.dataDir}/blocks
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- ${config.services.bitcoind.dataDir}/chainstate
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- ${config.services.bitcoind.dataDir}/indexes
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''}
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${config.services.bitcoind.dataDir}
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${config.services.clightning.dataDir}
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${config.services.lnd.dataDir}
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${optionalString (!cfg.with-bulk-data) ''
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- ${config.services.liquidd.dataDir}/*/blocks
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- ${config.services.liquidd.dataDir}/*/chainstate
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- ${config.services.liquidd.dataDir}/*/indexes
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''}
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${config.services.liquidd.dataDir}
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${optionalString cfg.with-bulk-data "${config.services.electrs.dataDir}"}
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${config.services.nbxplorer.dataDir}
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${config.services.btcpayserver.dataDir}
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${config.services.joinmarket.dataDir}
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${optionalString config.nix-bitcoin.generateSecrets "${config.nix-bitcoin.secretsDir}"}
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/var/lib/tor
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/var/lib/nixos
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${builtins.concatStringsSep "\n" postgresqlBackupPaths}
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# Exclude all unspecified files and directories
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- /
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'';
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postgresqlBackupDir = config.services.postgresqlBackup.location;
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postgresqlBackupPaths = map (db: "${postgresqlBackupDir}/${db}.sql.gz") cfg.postgresqlDatabases;
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postgresqlBackupServices = map (db: "postgresqlBackup-${db}.service") cfg.postgresqlDatabases;
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in {
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inherit options;
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config = mkIf cfg.enable {
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environment.systemPackages = [ pkgs.duplicity ];
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services.duplicity = {
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enable = true;
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extraFlags = [
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"--include-filelist" "${filelist}"
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"--full-if-older-than" "1M"
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];
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targetUrl = cfg.destination;
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frequency = cfg.frequency;
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secretFile = "${config.nix-bitcoin.secretsDir}/backup-encryption-env";
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};
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systemd.services.duplicity = {
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wants = postgresqlBackupServices;
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after = postgresqlBackupServices;
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};
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services.postgresqlBackup = {
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enable = mkIf (cfg.postgresqlDatabases != []) true;
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databases = cfg.postgresqlDatabases;
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};
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nix-bitcoin.secrets.backup-encryption-env.user = "root";
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nix-bitcoin.generateSecretsCmds.backups = ''
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makePasswordSecret backup-encryption-password
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if [[ backup-encryption-password -nt backup-encryption-env ]]; then
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echo "PASSPHRASE=$(cat backup-encryption-password)" > backup-encryption-env
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fi
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'';
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services.backups.postgresqlDatabases = mkIf config.services.btcpayserver.enable [ "btcpaydb" ];
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};
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}
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