#! /usr/bin/env bash # More info at: https://github.com/elitak/nixos-infect set -e -o pipefail makeConf() { # Skip everything if main config already present [[ -e /etc/nixos/configuration.nix ]] && return 0 # NB <<"EOF" quotes / $ ` in heredocs, < /etc/nixos/configuration.nix << EOF { pkgs, lib, ... }: { imports = [ ./hardware-configuration.nix $network_import $NIXOS_IMPORT ./files.nix ./mailserver/system/mailserver.nix ./letsencrypt/acme.nix ./backup/restic.nix ./passmgr/bitwarden.nix ./nginx/nginx.nix ./nextcloud/nextcloud.nix ./resources/limits.nix ./videomeet/jitsi.nix ./git/gitea.nix ]; boot.cleanTmpDir = true; networking = { hostName = "$(hostname)"; firewall = { allowedTCPPorts = lib.mkForce [ 22 443 80 143 587 480 8080 8222 6667 8448 8388 8404 ]; allowedUDPPorts = lib.mkForce [ 22 443 80 143 587 480 8080 8222 6667 8448 8388 ]; }; }; time.timeZone = "Europe/Uzhgorod"; i18n.defaultLocale = "en_GB.UTF-8"; users.users.root.openssh.authorizedKeys.keys = [$(while read -r line; do echo -n " \"$line\" "; done <<< "$keys") ]; services.openssh = { enable = true; passwordAuthentication = true; permitRootLogin = "yes"; openFirewall = false; }; programs.ssh = { pubkeyAcceptedKeyTypes = [ "ssh-ed25519" ]; hostKeyAlgorithms = [ "ssh-ed25519" ]; }; environment.systemPackages = with pkgs; [ letsencrypt mkpasswd git wget curl restic pwgen tmux sudo python3 ] ++ (with python38Packages; [ pip flask pandas ]); environment.variables = { DOMAIN = "$DOMAIN"; AWS_ACCESS_KEY_ID = "$AWS_ACCESS_KEY_ID"; AWS_SECRET_ACCESS_KEY = "$AWS_SECRET_ACCESS_KEY"; }; system.autoUpgrade.enable = true; system.autoUpgrade.allowReboot = false; system.autoUpgrade.channel = https://nixos.org/channels/nixos-20.09-small; nix = { optimise.automatic = true; gc = { automatic = true; options = "--delete-older-than 7d"; }; }; boot.kernel.sysctl = { "net.ipv4.ip_forward" = 1; }; swapDevices = [ { device = "/swapfile"; priority = 0; size = 2048; } ]; security = { sudo = { enable = true; wheelNeedsPassword = true; }; }; } EOF # If you rerun this later, be sure to prune the filesSystems attr cat > /etc/nixos/hardware-configuration.nix << EOF { ... }: { imports = [ ]; boot.loader.grub.device = "$grubdev"; fileSystems."/" = { device = "$rootfsdev"; fsType = "ext4"; }; } EOF cat > /etc/nixos/files.nix << EOF { pkgs, ... }: { systemd.tmpfiles.rules = let nextcloudDBPass = builtins.replaceStrings [ "\n" "\"" "\\" ] [ "\\n" "\\\"" "\\\\" ] '' irememberMyownvillagewhereiwasdrillingshit1 ''; nextcloudAdminPass = builtins.replaceStrings [ "\n" "\"" "\\" ] [ "\\n" "\\\"" "\\\\" ] '' irememberMyownvillagewhereiwasdrillingshit1 ''; resticPass = builtins.replaceStrings [ "\n" "\"" "\\" ] [ "\\n" "\\\"" "\\\\" ] '' irememberMyownvillagewhereiwasdrillingshit1 ''; in [ "d /var/restic 0660 restic - - -" "d /var/bitwarden 0777 bitwarden_rs bitwarden_rs -" "d /var/api 0775 unit unit -" "d /var/bitwarden/backup 0777 bitwarden_rs bitwarden_rs -" "f /var/api/app.py 0775 unit unit - ${apiEndpoints}" "f /var/api/requirements.txt 0664 unit unit - ${apiRequirements}" "f /var/restic/restic-repo-password 0660 restic - - ${resticPass}" "f /var/nextcloud-db-pass 0440 nextcloud nextcloud - ${nextcloudDBPass}" "f /var/nextcloud-admin-pass 0440 nextcloud nextcloud - ${nextcloudAdminPass}" ]; } EOF cat > /etc/nixos/mailserver/system/mailserver.nix << EOF { config, pkgs, lib, ... }: { imports = [ (builtins.fetchTarball { # Pick a commit from the branch you are interested in url = "https://gitlab.com/simple-nixos-mailserver/nixos-mailserver/-/archive/99f843de/nixos-mailserver-99f843de.tar.gz"; # And set its hash sha256 = "1af7phs8a2j26ywsm5mfhzvqmy0wdsph7ajs9s65c4r1bfq646fw"; }) ]; services.dovecot2 = { enablePAM = lib.mkForce true; showPAMFailure = lib.mkForce true; }; mailserver = { enable = true; fqdn = "$DOMAIM"; domains = [ "$DOMAIN" ]; # A list of all login accounts. To create the password hashes, use # mkpasswd -m sha-512 "super secret password" loginAccounts = { "$USER@$DOMAIN" = { hashedPassword = "$PASSWORD"; #aliases = [ # "mail@example.com" #]; # Make this user the catchAll address for domains blah.com and # example2.com catchAll = [ "$DOMAIN" ]; sieveScript = '' require ["fileinto", "mailbox"]; if header :contains "Chat-Version" "1.0" { fileinto :create "DeltaChat"; stop; } ''; }; }; # Extra virtual aliases. These are email addresses that are forwarded to # loginAccounts addresses. extraVirtualAliases = { # address = forward address; "admin@$DOMAIN" = "$USER@$DOMAIN"; }; # Use Let's Encrypt certificates. Note that this needs to set up a stripped # down nginx and opens port 80. certificateScheme = 3; # Enable IMAP and POP3 enableImap = true; enableImapSsl = true; enablePop3 = false; enablePop3Ssl = false; dkimSelector = "selector"; # Enable the ManageSieve protocol enableManageSieve = true; virusScanning = false; }; } EOF cat > /etc/nixos/letsencrypt/acme.nix << EOF { pkgs, ... }: { users.groups.acmerecievers = { members = [ "nginx" "dovecot2" "postfix" "virtualMail" "bitwarden_rs" "nextcloud" "uwsgi" ]; }; security.acme = { acceptTerms = true; email = "$USER@$DOMAIN"; certs = { "$DOMAIN" = { group = "acmerecievers"; }; "git.$DOMAIN" = { group = "acmerecievers"; }; "cloud.$DOMAIN" = { group = "acmerecievers"; }; "password.$DOMAIN" = { group = "acmerecievers"; }; "api.$DOMAIN" = { group = "acmerecievers"; }; "meet.$DOMAIN" = { group = "acmerecievers"; }; }; }; } EOF cat > /etc/nixos/backup/restic.nix << EOF { pkgs, ... }: { services.restic.backups = { options = { passwordFile = "/etc/restic/resticPasswd"; repository = "s3:s3.anazonaws.com/eec1ya-backup"; initialize = true; paths = [ "/var/dkim" "/var/vmail" ]; timerConfig = { OnCalendar = [ "daily" ]; }; user = "restic"; pruneOpts = [ "--keep-daily 5" ]; }; }; users.users.restic = { isNormalUser = false; }; environment.etc."restic/resticPasswd".text = '' sadihvkrgjkdf ''; environment.etc."restic/s3Passwd".text = '' AWS_ACCESS_KEY_ID=$AWS_ACCESS_KEY_ID AWS_SECRET_ACCESS_KEY=$AWS_SECRET_ACCESS_KEY ''; } EOF cat > /etc/nixos/passmgr/bitwarden.nix << EOF { pkgs, ... }: { services.bitwarden_rs = { enable = true; dbBackend = "sqlite"; backupDir = "/var/bitwarden/backup"; config = { domain = "https://password.$DOMAIN/"; signupsAllowed = true; rocketPort = 8222; rocketLog = "warning"; }; }; } EOF cat > /etc/nixos/nginx/nginx.nix << EOF { pkgs, ... }: { services.nginx = { enable = true; recommendedGzipSettings = true; recommendedOptimisation = true; recommendedProxySettings = true; recommendedTlsSettings = true; virtualHosts = { "$DOMAIN" = { enableACME = true; forceSSL = true; }; "git.$DOMAIN" = { enableACME = true; forceSSL = true; locations = { "/" = { proxyPass = "http://127.0.0.1:3000"; extraConfig = '' proxy_headers_hash_max_size 512; proxy_headers_hash_bucket_size 128; ''; }; }; }; "cloud.$DOMAIN" = { enableACME = true; forceSSL = true; locations = { "/" = { proxyPass = "http://127.0.0.1:80/"; extraConfig = '' proxy_headers_hash_max_size 512; proxy_headers_hash_bucket_size 128; ''; }; }; }; "password.$DOMAIN" = { enableACME = true; forceSSL = true; locations = { "/" = { proxyPass = "http://127.0.0.1:8222"; extraConfig = '' proxy_headers_hash_max_size 512; proxy_headers_hash_bucket_size 128; ''; }; }; }; "api.$DOMAIN" = { enableACME = true; forceSSL = true; locations = { "/" = { proxyPass = "http://127.0.0.1:1256"; extraConfig = '' proxy_headers_hash_max_size 512; proxy_headers_hash_bucket_size 128; ''; }; }; }; }; }; } EOF cat > /etc/nixos/nextcloud/nextcloud.nix << EOF { pkgs, ... }: { services.nextcloud = { enable = true; package = pkgs.nextcloud20; hostName = "cloud.$DOMAIN"; # Use HTTPS for links https = false; # Auto-update Nextcloud Apps autoUpdateApps.enable = true; # Set what time makes sense for you autoUpdateApps.startAt = "05:00:00"; config = { # Further forces Nextcloud to use HTTPS overwriteProtocol = "http"; # Nextcloud PostegreSQL database configuration, recommended over using SQLite dbtype = "sqlite"; dbuser = "nextcloud"; dbhost = "/run/postgresql"; # nextcloud will add /.s.PGSQL.5432 by itself dbname = "nextcloud"; dbpassFile = "/var/nextcloud-db-pass"; adminpassFile = "/var/nextcloud-admin-pass"; adminuser = "admin"; }; }; } EOF cat > /etc/nixos/git/gitea.nix << EOF { pkgs, ... }: { services = { gitea = { enable = true; stateDir = "/var/lib/gitea"; log = { rootPath = "/var/lib/gitea/log"; level = "Warn"; }; user = "gitea"; database = { type = "sqlite3"; host = "127.0.0.1"; name = "gitea"; user = "gitea"; path = "/var/lib/gitea/data/gitea.db"; createDatabase = true; }; ssh = { enable = true; clonePort = 22; }; lfs = { enable = true; contentDir = "/var/lib/gitea/lfs"; }; appName = "SelfPrivacy git Service"; repositoryRoot = "/var/lib/gitea/repositories"; domain = "git.$DOMAIN"; rootUrl = "https://$DOMAIN/"; httpAddress = "0.0.0.0"; httpPort = 3000; cookieSecure = true; settings = { mailer = { ENABLED = false; }; ui = { DEFAULT_THEME = "arc-green"; }; picture = { DISABLE_GRAVATAR = true; }; admin = { ENABLE_KANBAN_BOARD = true; }; repository = { FORCE_PRIVATE = false; }; }; }; }; } EOF cat > /etc/nixos/resources/limits.nix << EOF { pkgs, ... }: { systemd.services = { dovecot2 = { serviceConfig = { cpuAccounting = true; cpuQuota = "20%"; memoryAccounting = true; memoryMax = "256M"; startLimitIntervalSec = 500; startLimitBurst = 5; blockIOWeigth = 25; }; }; postfix = { serviceConfig = { cpuAccounting = true; cpuQuota = "20%"; memoryAccounting = true; memoryMax = "256M"; startLimitIntervalSec = 500; startLimitBurst = 5; blockIOWeigth = 25; }; }; ocserv = { serviceConfig = { cpuAccounting = true; cpuQuota = "70%"; memoryAccounting = true; memoryMax = "512M"; startLimitIntervalSec = 500; startLimitBurst = 5; }; }; nginx = { serviceConfig = { cpuAccounting = true; cpuQuota = "70%"; memoryAccounting = true; memoryMax = "768M"; startLimitIntervalSec = 500; startLimitBurst = 5; blockIOWeigth = 10; }; }; }; } EOF cat > /etc/nixos/videomeet/jitsi.nix << EOF { pkgs, ... }: { services.jitsi-meet = { enable = true; hostName = "meet.$DOMAIN"; nginx.enable = true; interfaceConfig = { SHOW_JITSI_WATERMARK = false; SHOW_WATERMARK_FOR_GUESTS = false; }; }; } EOF [[ -n "$doNetConf" ]] && makeNetworkingConf } makeNetworkingConf() { # XXX It'd be better if we used procfs for all this... local IFS=$'\n' eth0_name=$(ip address show | grep '^2:' | awk -F': ' '{print $2}') eth0_ip4s=$(ip address show dev "$eth0_name" | grep 'inet ' | sed -r 's|.*inet ([0-9.]+)/([0-9]+).*|{ address="\1"; prefixLength=\2; }|') eth0_ip6s=$(ip address show dev "$eth0_name" | grep 'inet6 ' | sed -r 's|.*inet6 ([0-9a-f:]+)/([0-9]+).*|{ address="\1"; prefixLength=\2; }|' || '') gateway=$(ip route show dev "$eth0_name" | grep default | sed -r 's|default via ([0-9.]+).*|\1|') gateway6=$(ip -6 route show dev "$eth0_name" | grep default | sed -r 's|default via ([0-9a-f:]+).*|\1|' || true) ether0=$(ip address show dev "$eth0_name" | grep link/ether | sed -r 's|.*link/ether ([0-9a-f:]+) .*|\1|') eth1_name=$(ip address show | grep '^3:' | awk -F': ' '{print $2}')||true if [ -n "$eth1_name" ];then eth1_ip4s=$(ip address show dev "$eth1_name" | grep 'inet ' | sed -r 's|.*inet ([0-9.]+)/([0-9]+).*|{ address="\1"; prefixLength=\2; }|') eth1_ip6s=$(ip address show dev "$eth1_name" | grep 'inet6 ' | sed -r 's|.*inet6 ([0-9a-f:]+)/([0-9]+).*|{ address="\1"; prefixLength=\2; }|' || '') ether1=$(ip address show dev "$eth1_name" | grep link/ether | sed -r 's|.*link/ether ([0-9a-f:]+) .*|\1|') interfaces1=<< EOF $eth1_name = { ipv4.addresses = [$(for a in "${eth1_ip4s[@]}"; do echo -n " $a"; done) ]; ipv6.addresses = [$(for a in "${eth1_ip6s[@]}"; do echo -n " $a"; done) ]; EOF extraRules1="ATTR{address}==\"${ether1}\", NAME=\"${eth1_name}\"" else interfaces1="" extraRules1="" fi readarray nameservers < <(grep ^nameserver /etc/resolv.conf | sed -r 's/^nameserver[[:space:]]+([0-9.a-fA-F]+).*/"\1"/') if [[ "$eth0_name" = eth* ]]; then predictable_inames="usePredictableInterfaceNames = lib.mkForce false;" else predictable_inames="usePredictableInterfaceNames = lib.mkForce true;" fi cat > /etc/nixos/networking.nix << EOF { lib, ... }: { # This file was populated at runtime with the networking # details gathered from the active system. networking = { nameservers = [ ${nameservers[@]} ]; defaultGateway = "${gateway}"; defaultGateway6 = "${gateway6}"; dhcpcd.enable = false; $predictable_inames interfaces = { $eth0_name = { ipv4.addresses = [$(for a in "${eth0_ip4s[@]}"; do echo -n " $a"; done) ]; ipv6.addresses = [$(for a in "${eth0_ip6s[@]}"; do echo -n " $a"; done) ]; ipv4.routes = [ { address = "${gateway}"; prefixLength = 32; } ]; ipv6.routes = [ { address = "${gateway6}"; prefixLength = 32; } ]; }; $interfaces1 }; }; services.udev.extraRules = '' ATTR{address}=="${ether0}", NAME="${eth0_name}" $extraRules1 ''; } EOF } makeSwap() { # TODO check currently available swapspace first swapFile=$(mktemp /tmp/nixos-infect.XXXXX.swp) dd if=/dev/zero "of=$swapFile" bs=1M count=$((1*1024)) chmod 0600 "$swapFile" mkswap "$swapFile" swapon -v "$swapFile" } removeSwap() { swapoff -a rm -vf /tmp/nixos-infect.*.swp } prepareEnv() { # $grubdev is used in makeConf() for grubdev in /dev/vda /dev/sda; do [[ -e $grubdev ]] && break; done # Retrieve root fs block device # (get root mount) (get partition or logical volume) rootfsdev=$(mount | grep "on / type" | awk '{print $1;}') # DigitalOcean doesn't seem to set USER while running user data export USER="root" export HOME="/root" # Nix installer tries to use sudo regardless of whether we're already uid 0 #which sudo || { sudo() { eval "$@"; }; export -f sudo; } # shellcheck disable=SC2174 mkdir -p -m 0755 /nix } fakeCurlUsingWget() { # Use adapted wget if curl is missing which wget && { \ curl() { eval "wget $( (local isStdout=1 for arg in "$@"; do case "$arg" in "-o") echo "-O"; isStdout=0 ;; "-O") isStdout=0 ;; "-L") ;; *) echo "$arg" ;; esac done; [[ $isStdout -eq 1 ]] && echo "-O-" )| tr '\n' ' ' )" }; export -f curl; } } req() { type "$1" > /dev/null 2>&1 || which "$1" > /dev/null 2>&1 } checkEnv() { # Perform some easy fixups before checking # TODO prevent multiple calls to apt-get update which dnf && dnf install -y perl-Digest-SHA # Fedora 24 which bzcat || (which yum && yum install -y bzip2) \ || (which apt-get && apt-get update && apt-get install -y bzip2) \ || true which xzcat || (which yum && yum install -y xz-utils) \ || (which apt-get && apt-get update && apt-get install -y xz-utils) \ || true which curl || fakeCurlUsingWget \ || (which apt-get && apt-get update && apt-get install -y curl) \ || true [[ "$(whoami)" == "root" ]] || { echo "ERROR: Must run as root"; return 1; } req curl || req wget || { echo "ERROR: Missing both curl and wget"; return 1; } req bzcat || { echo "ERROR: Missing bzcat"; return 1; } req xzcat || { echo "ERROR: Missing xzcat"; return 1; } req groupadd || { echo "ERROR: Missing groupadd"; return 1; } req useradd || { echo "ERROR: Missing useradd"; return 1; } req ip || { echo "ERROR: Missing ip"; return 1; } req awk || { echo "ERROR: Missing awk"; return 1; } req cut || { echo "ERROR: Missing cut"; return 1; } } infect() { # Add nix build users # FIXME run only if necessary, rather than defaulting true groupadd nixbld -g 30000 || true for i in {1..10}; do useradd -c "Nix build user $i" -d /var/empty -g nixbld -G nixbld -M -N -r -s "$(which nologin)" "nixbld$i" || true done # TODO use addgroup and adduser as fallbacks #addgroup nixbld -g 30000 || true #for i in {1..10}; do adduser -DH -G nixbld nixbld$i || true; done curl -L https://nixos.org/nix/install | $SHELL # shellcheck disable=SC1090 source ~/.nix-profile/etc/profile.d/nix.sh [[ -z "$NIX_CHANNEL" ]] && NIX_CHANNEL="nixos-19.09" nix-channel --remove nixpkgs nix-channel --add "https://nixos.org/channels/$NIX_CHANNEL" nixos nix-channel --update export NIXOS_CONFIG=/etc/nixos/configuration.nix nix-env --set \ -I nixpkgs=$HOME/.nix-defexpr/channels/nixos \ -f '' \ -p /nix/var/nix/profiles/system \ -A system # Remove nix installed with curl | bash rm -fv /nix/var/nix/profiles/default* /nix/var/nix/profiles/system/sw/bin/nix-collect-garbage # Reify resolv.conf [[ -L /etc/resolv.conf ]] && mv -v /etc/resolv.conf /etc/resolv.conf.lnk && cat /etc/resolv.conf.lnk > /etc/resolv.conf # Stage the Nix coup d'état touch /etc/NIXOS echo etc/nixos > /etc/NIXOS_LUSTRATE echo etc/resolv.conf >> /etc/NIXOS_LUSTRATE echo root/.nix-defexpr/channels >> /etc/NIXOS_LUSTRATE rm -rf /boot.bak mv -v /boot /boot.bak /nix/var/nix/profiles/system/bin/switch-to-configuration boot } [ "$PROVIDER" = "digitalocean" ] && doNetConf=y # digitalocean requires detailed network config to be generated prepareEnv makeSwap # smallest (512MB) droplet needs extra memory! checkEnv makeConf infect removeSwap if [[ -z "$NO_REBOOT" ]]; then reboot fi