lnd, joinmarket: don't write to secrets dir
Keeping the secrets dir read-only is more simple and robust. - lnd seed mnemonic creation and joinmarket wallet creation can be run as the regular service user instead of root. - It is easier to switch to a third-party secrets deployment method in the future. Don't create a seed mnemonic for lnd when a wallet exists. This avoids creating unused mnemonics and helps simplifying the migration command in `versioning.nix`.
This commit is contained in:
Erik Arvstedt
parent
55d87490ec
commit
03db1a61b1
@ -71,11 +71,13 @@
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## WARNING
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# If you use lnd, you should manually backup your wallet mnemonic
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# seed. This will allow you to recover on-chain funds. You can run the
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# following command after the lnd service starts:
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# scp bitcoin-node:/secrets/lnd-seed-mnemonic ./secrets/lnd-seed-mnemonic
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# following commands after the lnd service starts:
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# mkdir -p ./backups/lnd/
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# scp bitcoin-node:/var/lib/lnd/lnd-seed-mnemonic ./backups/lnd/
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#
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# You should also backup your channel state after opening new channels.
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# This will allow you to recover off-chain funds, by force-closing channels.
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# scp bitcoin-node:/var/lib/lnd/chain/bitcoin/mainnet/channel.backup /my-backup-path/channel.backup
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# scp bitcoin-node:/var/lib/lnd/chain/bitcoin/mainnet/channel.backup ./backups/lnd/
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### SPARK WALLET
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# Enable this module to use spark-wallet, a minimalistic wallet GUI for
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@ -229,5 +231,6 @@
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# The nix-bitcoin release version that your config is compatible with.
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# When upgrading to a backwards-incompatible release, nix-bitcoin will display an
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# an error and provide hints for migrating your config to the new release.
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nix-bitcoin.configVersion = "0.0.30";
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nix-bitcoin.configVersion = "0.0.41";
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}
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@ -4,7 +4,6 @@ with lib;
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let
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cfg = config.services.backups;
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secretsDir = config.nix-bitcoin.secretsDir;
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filelist = pkgs.writeText "filelist.txt" ''
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${optionalString (!cfg.with-bulk-data) "- ${config.services.bitcoind.dataDir}/blocks"}
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@ -12,7 +11,6 @@ let
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${config.services.bitcoind.dataDir}
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${config.services.clightning.dataDir}
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${config.services.lnd.dataDir}
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${secretsDir}/lnd-seed-mnemonic
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${optionalString (!cfg.with-bulk-data) "- ${config.services.liquidd.dataDir}/*/blocks"}
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${optionalString (!cfg.with-bulk-data) "- ${config.services.liquidd.dataDir}/*/chainstate"}
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${config.services.liquidd.dataDir}
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@ -20,8 +18,8 @@ let
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${config.services.nbxplorer.dataDir}
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${config.services.btcpayserver.dataDir}
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${config.services.joinmarket.dataDir}
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${secretsDir}/jm-wallet-seed
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${config.services.postgresqlBackup.location}/btcpaydb.sql.gz
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${optionalString config.nix-bitcoin.generateSecrets "${config.nix-bitcoin.secretsDir}"}
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/var/lib/tor
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# Extra files
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${cfg.extraFiles}
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@ -240,20 +240,19 @@ in {
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'';
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# Generating wallets (jmclient/wallet.py) is only supported for mainnet or testnet
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ExecStartPost = mkIf (bitcoind.network == "mainnet")
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(nbLib.privileged "joinmarket-create-wallet" ''
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(nbLib.script "joinmarket-create-wallet" ''
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walletname=wallet.jmdat
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wallet=${cfg.dataDir}/wallets/$walletname
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if [[ ! -f $wallet ]]; then
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echo "Create wallet"
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pw=$(cat "${secretsDir}"/jm-wallet-password)
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cd ${cfg.dataDir}
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if ! ${pkgs.utillinux}/bin/runuser -u ${cfg.user} -- \
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${nbPkgs.joinmarket}/bin/jm-genwallet --datadir=${cfg.dataDir} $walletname $pw \
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if ! ${nbPkgs.joinmarket}/bin/jm-genwallet --datadir=${cfg.dataDir} $walletname $pw \
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| grep 'recovery_seed' \
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| cut -d ':' -f2 \
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| (umask u=r,go=; cat > "${secretsDir}/jm-wallet-seed"); then
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| (umask u=r,go=; cat > jm-wallet-seed); then
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echo "wallet creation failed"
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rm -f "$wallet" "${secretsDir}/jm-wallet-seed"
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rm -f "$wallet" jm-wallet-seed
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exit 1
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fi
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fi
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@ -200,32 +200,28 @@ in {
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ExecStartPost = let
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restUrl = "https://${cfg.restAddress}:${toString cfg.restPort}/v1";
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in [
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# Run fully privileged for secrets dir write access
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(nbLib.privileged "lnd-create-mnemonic" ''
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(nbLib.script "lnd-create-wallet" ''
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attempts=250
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while ! { exec 3>/dev/tcp/${cfg.restAddress}/${toString cfg.restPort} && exec 3>&-; } &>/dev/null; do
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((attempts-- == 0)) && { echo "lnd REST service unreachable"; exit 1; }
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sleep 0.1
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done
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mnemonic=${secretsDir}/lnd-seed-mnemonic
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if [[ ! -f $mnemonic ]]; then
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echo Create lnd seed
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umask u=r,go=
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${pkgs.curl}/bin/curl -s \
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--cacert ${secretsDir}/lnd-cert \
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-X GET ${restUrl}/genseed | ${pkgs.jq}/bin/jq -c '.cipher_seed_mnemonic' > "$mnemonic"
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fi
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chown ${cfg.user}: "$mnemonic"
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'')
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(nbLib.script "lnd-create-wallet" ''
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if [[ ! -f ${networkDir}/wallet.db ]]; then
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echo Create lnd wallet
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mnemonic="${cfg.dataDir}/lnd-seed-mnemonic"
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if [[ ! -f "$mnemonic" ]]; then
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echo Create lnd seed
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umask u=r,go=
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${pkgs.curl}/bin/curl -s \
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--cacert ${secretsDir}/lnd-cert \
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-X GET ${restUrl}/genseed | ${pkgs.jq}/bin/jq -c '.cipher_seed_mnemonic' > "$mnemonic"
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fi
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echo Create lnd wallet
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${pkgs.curl}/bin/curl -s --output /dev/null --show-error \
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--cacert ${secretsDir}/lnd-cert \
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-X POST -d "{\"wallet_password\": \"$(cat ${secretsDir}/lnd-wallet-password | tr -d '\n' | base64 -w0)\", \
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\"cipher_seed_mnemonic\": $(cat ${secretsDir}/lnd-seed-mnemonic | tr -d '\n')}" \
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\"cipher_seed_mnemonic\": $(cat "$mnemonic" | tr -d '\n')}" \
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${restUrl}/initwallet
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# Guarantees that RPC calls with cfg.cli succeed after the service is started
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@ -248,9 +244,8 @@ in {
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while ! { exec 3>/dev/tcp/${cfg.rpcAddress}/${toString cfg.rpcPort}; } &>/dev/null; do
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sleep 0.1
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done
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'')
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# Run fully privileged for chown
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# Setting macaroon permission for other users needs root permissions
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(nbLib.privileged "lnd-create-macaroons" ''
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umask ug=r,o=
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${lib.concatMapStrings (macaroon: ''
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@ -69,6 +69,28 @@ let
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(mkOnionServiceChange "clightning")
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(mkOnionServiceChange "lnd")
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(mkOnionServiceChange "btcpayserver")
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{
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version = "0.0.41";
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condition = config.services.lnd.enable || config.services.joinmarket.enable;
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message = let
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secretsDir = config.nix-bitcoin.secretsDir;
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lnd = config.services.lnd;
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jm = config.services.joinmarket;
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in ''
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Secret files generated by services at runtime are now stored in the service
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data dirs instead of the global secrets dir.
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To migrate, run the following Bash script as root on your nix-bitcoin node:
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if [[ -e ${secretsDir}/lnd-seed-mnemonic ]]; then
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install -o ${lnd.user} -g ${lnd.group} -m400 "${secretsDir}/lnd-seed-mnemonic" "${lnd.dataDir}"
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fi
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if [[ -e ${secretsDir}/jm-wallet-seed ]]; then
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install -o ${jm.user} -g ${jm.group} -m400 "${secretsDir}/jm-wallet-seed" "${jm.dataDir}"
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fi
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rm -f "${secretsDir}"/{lnd-seed-mnemonic,jm-wallet-seed}
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'';
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}
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];
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incompatibleChanges = optionals
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@ -326,16 +326,22 @@ def _():
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files = {
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"bitcoind": "var/lib/bitcoind/test/wallet.dat",
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"clightning": "var/lib/clightning/bitcoin/hsm_secret",
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"lnd": "secrets/lnd-seed-mnemonic",
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"joinmarket": "secrets/jm-wallet-seed",
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"lnd": "var/lib/lnd/lnd-seed-mnemonic",
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"joinmarket": "var/lib/joinmarket/jm-wallet-seed",
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"btcpayserver": "var/backup/postgresql/btcpaydb.sql.gz",
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}
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actual_files = succeed(f"{run_duplicity} list-current-files file:///var/lib/localBackups")
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for test, file in files.items():
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if test in enabled_tests and file not in actual_files:
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def assert_file_exists(file):
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if file not in actual_files:
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raise Exception(f"Backup file '{file}' is missing.")
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for test, file in files.items():
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if test in enabled_tests:
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assert_file_exists(file)
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assert_file_exists("secrets/lnd-wallet-password")
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# Impure: restarts services
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@test("banlist-and-restart")
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