# mempool.space v2 production website hosting These instructions are for setting up a serious production mempool website for Mainnet, Testnet, and Liquid. For home users, follow the main instructions instead. ### Server Hardware Mempool V2 is powered by electrs, which is a beast. I recommend a beefy server: * 16C CPU (more is better) * 64G RAM (more is better) * 2TB SSD (NVMe is better) ### HDD vs SSD vs NVMe If you don't have a fast SSD or NVMe backed disk, that's fine. What you do is, go online and buy some fast new NVMe drives and wait for them to arrive. After you install them, throw away your old HDDs and then proceed with the rest of this guide. ## FreeBSD 12 The mempool.space site is powered by FreeBSD with ZFS root and ARC cache for maximum performance. Linux probably works fine too, but why settle? ### Filesystem For maximum performance, I use 2x 1TB NVMe SSDs in a RAID 0 using ZFS with lots of RAM for the ARC L2 cache. ``` # zpool list -v nvmraid NAME SIZE ALLOC FREE CKPOINT EXPANDSZ FRAG CAP DEDUP HEALTH ALTROOT nvmraid 1.81T 1.04T 787G - - 0% 57% 1.00x ONLINE - nvd0 928G 535G 393G - - 0% 57% nvd1 928G 534G 394G - - 0% 57% ``` For maximum flexibility of configuration, I configure the partitions separately for each data folder: ``` Filesystem Size Used Avail Capacity Mounted on nvmraid/mempool 732G 3.0G 729G 0% /mempool nvmraid/mysql 730G 618M 729G 0% /mysql nvmraid/bisq 729G 88K 729G 0% /bisq nvmraid/elements 731G 1.8G 729G 0% /elements nvmraid/elements/liquidv1 737G 7.2G 729G 1% /elements/liquidv1 nvmraid/elements/electrs 730G 434M 729G 0% /elements/electrs nvmraid/bitcoin 730G 694M 729G 0% /bitcoin nvmraid/bitcoin/chainstate 733G 3.9G 729G 1% /bitcoin/chainstate nvmraid/bitcoin/indexes 757G 27G 729G 4% /bitcoin/indexes nvmraid/bitcoin/electrs 730G 853M 729G 0% /bitcoin/electrs nvmraid/bitcoin/blocks 1.0T 306G 729G 30% /bitcoin/blocks nvmraid/bitcoin/testnet3 729G 13M 729G 0% /bitcoin/testnet3 nvmraid/bitcoin/testnet3/blocks 756G 26G 729G 3% /bitcoin/testnet3/blocks nvmraid/bitcoin/testnet3/chainstate 731G 1.3G 729G 0% /bitcoin/testnet3/chainstate nvmraid/bitcoin/testnet3/indexes 733G 3.8G 729G 1% /bitcoin/testnet3/indexes nvmraid/electrs/liquid/cache 729G 39M 729G 0% /electrs/liquid/newindex/cache nvmraid/electrs/liquid/history 730G 737M 729G 0% /electrs/liquid/newindex/history nvmraid/electrs/liquid/txstore 736G 6.2G 729G 1% /electrs/liquid/newindex/txstore nvmraid/electrs/mainnet/cache 729G 44M 729G 0% /electrs/mainnet/newindex/cache nvmraid/electrs/mainnet/history 964G 234G 729G 24% /electrs/mainnet/newindex/history nvmraid/electrs/mainnet/txstore 1.1T 392G 729G 35% /electrs/mainnet/newindex/txstore nvmraid/electrs/testnet/cache 729G 40M 729G 0% /electrs/testnet/newindex/cache nvmraid/electrs/testnet/history 747G 18G 729G 2% /electrs/testnet/newindex/history nvmraid/electrs/testnet/txstore 764G 34G 729G 4% /electrs/testnet/newindex/txstore ``` ### Build Dependencies You'll probably need these: ``` pkg install -y zsh sudo git screen vim-console curl wget neovim rsync pkg install -y openssl openssh-portable open-vm-tools-nox11 py37-pip pkg install -y boost-libs autoconf automake gmake gcc libevent libtool pkgconf pkg install -y mariadb55-server mariadb55-client nginx py37-certbot-nginx npm ``` ### Rust I recommend to build rust from latest source: ``` curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh ``` ### Tor Install tor, add Bitcoin to _tor group: ``` pkg install -y tor pw user mod bitcoin -G _tor ``` Then configure `/usr/local/etc/tor/torrc` as follows: ``` RunAsDaemon 1 SOCKSPort 9050 ControlPort 9051 Log notice syslog CookieAuthentication 1 CookieAuthFileGroupReadable 1 DataDirectoryGroupReadable 1 HiddenServiceDir /var/db/tor/mempool HiddenServicePort 80 127.0.0.1:81 HiddenServiceVersion 3 ``` ### Bitcoin Build [Bitcoin Core](https://github.com/bitcoin/bitcoin) from source. Alternatively, install the OS packages: ``` pkg install -y bitcoin-daemon bitcoin-utils ``` Configure your bitcoin.conf like this: ``` server=1 daemon=1 listen=1 discover=1 txindex=1 par=16 dbcache=3700 maxconnections=1337 timeout=30000 onion=127.0.0.1:9050 rpcallowip=127.0.0.1 rpcuser=0cd862dce678b830bd2aa36f10b9b6b2 rpcpassword=2d89d36cac4a13c87b5d19ef8f577e37 rpcworkqueue=128 rpcthreads=32 rpctimeout=60 [main] bind=127.0.0.1:8333 rpcbind=127.0.0.1:8332 [test] bind=127.0.0.1:18333 rpcbind=127.0.0.1:18332 ``` ### Elements Build [Elements Core](https://github.com/ElementsProject/elements) from source: ``` ./autogen.sh MAKE=gmake CC=cc CXX=c++ CPPFLAGS=-I/usr/local/include \ ./configure --with-gui=no --disable-wallet gmake -j19 gmake install ``` Configure your elements.conf like this: ``` server=1 daemon=1 listen=1 chain=liquidv1 rpcuser=liquiduser rpcpassword=liquidpass validatepegin=1 mainchainrpchost=127.0.0.1 mainchainrpcport=8332 mainchainrpcuser=user mainchainrpcpassword=pass txindex=1 ``` Start elementsd and wait for it to sync the Liquid blockchain. ### Electrs Install [Electrs](https://github.com/Blockstream/electrs) from source: ``` git clone https://github.com/Blockstream/electrs cd electrs git checkout new-index ``` You'll need 3 instances, one for each network. Build one at a time: ``` ./electrs-start-mainnet ./electrs-start-testnet ./electrs-start-liquid ``` ### MariaDB Import historical mempool fee database snapshot, or the blank mariadb structure if none: ``` mysql -u root create database mempool; grant all on mempool.* to 'mempool'@'localhost' identified by 'mempool'; create database tmempool; grant all on tmempool.* to 'tmempool'@'localhost' identified by 'tmempool'; create database lmempool; grant all on lmempool.* to 'lmempool'@'localhost' identified by 'lmempool'; ``` Then import ``` mysql -u mempool -p mempool < /mempool/mempool/mariadb-structure.sql mysql -u tmempool -p tmempool < /mempool/mempool/mariadb-structure.sql mysql -u lmempool -p lmempool < /mempool/mempool/mariadb-structure.sql ``` ### Mempool After all 3 electrs instances are fully indexed, install your 3 mempool nodes: ``` ./mempool-install-all ./mempool-upgrade-all ``` Finally, start your 3 mempool backends: ``` ./mempool-start-all ``` ### Nginx Get SSL certificate using certbot: ``` certbot --nginx -d mempool.space ``` Install nginx.conf from this repo, edit as necessary: ``` cp nginx.conf /usr/local/etc/nginx/nginx.conf vi /usr/local/etc/nginx/nginx.conf ``` Restart nginx ``` service nginx restart ``` ### Done Your site should look like https://mempool.space/ If it doesn't ask wiz on Keybase DM or Twitter for help.