always pass secrets as files
This commit is contained in:
Jeffrey C. Ollie
parent
fd6abfc50d
commit
a302112120
202
flake.nix
202
flake.nix
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@ -88,12 +88,7 @@
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options = {
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enable = lib.options.mkEnableOption "Restic";
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passwordFile = lib.options.mkOption {
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type = lib.types.nullOr lib.types.str;
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default = null;
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};
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password = lib.options.mkOption {
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type = lib.types.nullOr lib.types.str;
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default = null;
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type = lib.types.path;
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};
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storage = lib.options.mkOption {
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type = lib.types.enum [
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@ -105,10 +100,10 @@
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type = lib.types.submodule {
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options = {
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enable = lib.options.mkEnableOption "use healthcheck";
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api_url = lib.options.mkOption {
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apiUrl = lib.options.mkOption {
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type = lib.types.str;
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};
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api_key = lib.options.mkOption {
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apiKeyFile = lib.options.mkOption {
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type = lib.types.str;
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};
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timeout = lib.options.mkOption {
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@ -128,10 +123,10 @@
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bucket = lib.options.mkOption {
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type = lib.types.str;
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};
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account_id = lib.options.mkOption {
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accountId = lib.options.mkOption {
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type = lib.types.str;
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};
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account_key = lib.options.mkOption {
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accountKeyFile = lib.options.mkOption {
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type = lib.types.str;
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};
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};
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@ -140,11 +135,12 @@
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azure = lib.options.mkOption {
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type = lib.types.submodule {
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options = {
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account_name = lib.options.mkOption {
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accountName = lib.options.mkOption {
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type = lib.types.str;
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};
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account_key = lib.options.mkOption {
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type = lib.types.str;
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accountKeyFile = lib.options.mkOption {
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type = lib.types.nullOr lib.types.str;
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default = null;
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};
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};
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};
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@ -153,7 +149,7 @@
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type = lib.types.listOf (
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lib.types.submodule {
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options = {
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one-file-system = lib.options.mkOption {
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oneFileSystem = lib.options.mkOption {
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type = lib.types.bool;
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default = false;
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};
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@ -180,131 +176,61 @@
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};
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};
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};
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config =
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let
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bucket = {
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"b2" = cfg.b2.bucket;
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"azure" = builtins.replaceStrings [ "." ] [ "-" ] "${config.networking.hostName}.${config.networking.domain}";
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}.${cfg.storage};
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directory = {
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"b2" = "${config.networking.hostName}.${config.networking.domain}";
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"azure" = "/";
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}.${cfg.storage};
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in
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lib.mkIf cfg.enable {
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assertions = [
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{
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assertion = !(cfg.passwordFile == null && cfg.password == null);
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message = "Must specifiy either passwordFile or password";
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}
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];
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warnings =
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if cfg.password != null then [
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''Restic encryption password will be stored world readable in the Nix store.''
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] else [ ];
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environment.systemPackages = [
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package
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];
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environment.etc."restic/password" = lib.mkIf (cfg.password != null) {
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text = cfg.password;
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user = "root";
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group = "root";
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mode = "0400";
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};
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environment.etc."restic/environment" =
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let
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hcConfig =
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if cfg.healthcheck.enable
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then ''
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HC_API_KEY=${cfg.healthcheck.api_key}
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HC_API_URL=${cfg.healthcheck.api_url}
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''
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else
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"";
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storageConfig = {
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"b2" = ''
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B2_ACCOUNT_ID=${cfg.b2.account_id}
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B2_ACCOUNT_KEY=${cfg.b2.account_key}
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'';
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"azure" = ''
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AZURE_ACCOUNT_NAME=${cfg.azure.account_name}
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AZURE_ACCOUNT_KEY=${cfg.azure.account_key}
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'';
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}.${cfg.storage};
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repositoryConfig = {
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"b2" = "b2:${bucket}:${directory}";
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"azure" = "azure:${bucket}:${directory}";
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}.${cfg.storage};
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in
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{
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text = ''
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${hcConfig}
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RESTIC_CACHE_DIR=/var/cache/restic
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RESTIC_PASSWORD_FILE=${if cfg.passwordFile != null then cfg.passwordFile else "/etc/restic/password"}
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RESTIC_REPOSITORY=${repositoryConfig}
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${storageConfig}
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'';
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user = "root";
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group = "root";
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mode = "0400";
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};
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environment.etc."restic/rclone" = {
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text = {
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"b2" = ''
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[b2]
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type = b2
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account = ${cfg.b2.account_id}
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key = ${cfg.b2.account_key}
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'';
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"azure" = ''
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[azure]
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type = azureblob
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account = ${cfg.azure.account_name}
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key = ${cfg.azure.account_key}
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'';
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}.${cfg.storage};
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user = "root";
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group = "root";
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mode = "0400";
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};
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systemd.services.restic =
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let
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curlOptions = "--fail --silent --show-error --max-time 10 --retry 5";
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hcPayload =
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if cfg.healthcheck.enable
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then
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builtins.toJSON
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{
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name = "${config.networking.hostName}.${config.networking.domain}";
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timeout = cfg.healthcheck.timeout;
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grace = cfg.healthcheck.grace;
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unique = [ "name" ];
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channels = "*";
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}
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(
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pkgs.writeText "healthcheck-payload"
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(
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builtins.toJSON
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{
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name = "${config.networking.hostName}.${config.networking.domain}";
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timeout = cfg.healthcheck.timeout;
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grace = cfg.healthcheck.grace;
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unique = [ "name" ];
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channels = "*";
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}
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)
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)
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else
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"";
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null;
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hcSetup =
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if cfg.healthcheck.enable
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then ''
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HC_PAYLOAD='${hcPayload}'
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HC_URL=$(${pkgs.curl}/bin/curl ${curlOptions} --request POST --header "X-Api-Key: $HC_API_KEY" --data "$HC_PAYLOAD" $HC_API_URL | ${pkgs.jq}/bin/jq -r .ping_url)
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HC_URL=''$(${pkgs.curl}/bin/curl ${curlOptions} --request POST --header 'Content-Type: application/json' --header "X-Api-Key: ''$(<${cfg.healthcheck.apiKeyFile})" --data @${hcPayload} "${cfg.healthcheck.apiUrl}" | ${pkgs.jq}/bin/jq -r .ping_url)
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''
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else
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"";
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hcStart =
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if cfg.healthcheck.enable
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then ''
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if [ ! -z "$HC_URL" ]
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if [ ! -z "''${HC_URL}" ]
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then
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${pkgs.curl}/bin/curl ${curlOptions} --output /dev/null $HC_URL/start || true
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${pkgs.curl}/bin/curl ${curlOptions} --output /dev/null "''${HC_URL}/start" || true
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fi
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''
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else
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@ -312,36 +238,56 @@
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hcStop =
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if cfg.healthcheck.enable
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then ''
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if [ ! -z "$HC_URL" ]
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if [ ! -z "''${HC_URL}" ]
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then
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${pkgs.curl}/bin/curl ${curlOptions} --output /dev/null $HC_URL || true
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${pkgs.curl}/bin/curl ${curlOptions} --output /dev/null "''${HC_URL}" || true
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fi
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''
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else
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"";
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repositoryConfig = {
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"b2" = "b2:${bucket}:${directory}";
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"azure" = "azure:${bucket}:${directory}";
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}.${cfg.storage};
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resticConfig = ''
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export RESTIC_CACHE_DIR=/var/cache/restic
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export RESTIC_PASSWORD_FILE=${cfg.passwordFile}
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export RESTIC_REPOSITORY=${repositoryConfig}
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''
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+ {
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"b2" = ''
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export B2_ACCOUNT_ID='${cfg.b2.accountId}'
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export B2_ACCOUNT_KEY="''$(<${cfg.b2.accountKeyFile})"
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'';
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"azure" = ''
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export AZURE_ACCOUNT_NAME='${cfg.azure.accountName}'
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export AZURE_ACCOUNT_KEY="''$(<${cfg.azure.accountKeyFile})"
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'';
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}.${cfg.storage};
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backupCommands = lib.strings.concatStringsSep "\n" (
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map
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(
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backup:
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let
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one-file-system =
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if backup.one-file-system
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oneFileSystem =
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if backup.oneFileSystem
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then
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" --one-file-system"
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else
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"";
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excludes = lib.strings.concatMapStrings
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(
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arg: " --exclude=${arg}"
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arg: '' --exclude="${arg}"''
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)
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backup.excludes;
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paths = lib.strings.concatStringsSep " " backup.paths;
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in
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''
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${backup.preCommand}
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${package}/bin/restic backup${one-file-system}${excludes} ${paths}
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${package}/bin/restic backup${oneFileSystem}${excludes} ${paths}
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${backup.postCommand}
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''
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)
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@ -349,22 +295,35 @@
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);
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initCheck = {
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"b2" = ''
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config=$(${pkgs.rclone}/bin/rclone --config /etc/restic/rclone lsjson "b2:${bucket}/${directory}/config" | ${pkgs.jq}/bin/jq -r '. | length | . > 0')
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export RCLONE_CONFIG=/dev/null
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export RCLONE_CONFIG_B2_TYPE=b2
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export RCLONE_CONFIG_B2_ACCOUNT='${cfg.b2.accountId}'
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export RCLONE_CONFIG_B2_KEY="''$(<${cfg.b2.accountKeyFile})"
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if [ "$config" != "true" ]
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config=''$(${pkgs.rclone}/bin/rclone lsjson 'b2:${bucket}/${directory}/config' | ${pkgs.jq}/bin/jq -r '. | length | . > 0')
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if [ "''${config}" != 'true' ]
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then
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${package}/bin/restic init
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fi
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'';
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"azure" = ''
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container=$(${pkgs.rclone}/bin/rclone --config /etc/restic/rclone lsjson "azure:" | ${pkgs.jq}/bin/jq -r 'map(select(.Path=="${bucket}" and .IsBucket)) | length | . > 0')
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if [ "$container" != "true" ]
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export RCLONE_CONFIG=/dev/null
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export RCLONE_CONFIG_AZURE_TYPE=azureblob
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export RCLONE_CONFIG_AZURE_ACCOUNT='${cfg.azure.accountName}'
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export RCLONE_CONFIG_AZURE_KEY="''$(<${cfg.azure.accountKeyFile})"
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container=''$(${pkgs.rclone}/bin/rclone lsjson 'azure:' | ${pkgs.jq}/bin/jq -r 'map(select(.Path=="${bucket}" and .IsBucket)) | length | . > 0')
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if [ "''${container}" != 'true' ]
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then
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${pkgs.rclone}/bin/rclone --config /etc/restic/rclone mkdir "azure:${bucket}"
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${pkgs.rclone}/bin/rclone mkdir 'azure:${bucket}'
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fi
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config=$(${pkgs.rclone}/bin/rclone --config /etc/restic/rclone lsjson "azure:${bucket}/config" | ${pkgs.jq}/bin/jq -r '. | length | . > 0')
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if [ "$config" != "true" ]
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config=$(${pkgs.rclone}/bin/rclone lsjson 'azure:${bucket}/config' | ${pkgs.jq}/bin/jq -r '. | length | . > 0')
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if [ "''${config}" != 'true' ]
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then
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${package}/bin/restic init
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fi
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@ -375,12 +334,13 @@
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serviceConfig = {
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Type = "oneshot";
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CacheDirectory = "restic";
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EnvironmentFile = "/etc/restic/environment";
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};
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script = ''
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${hcSetup}
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${hcStart}
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${resticConfig}
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${initCheck}
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${backupCommands}
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