systems/backup-2/base.nix

   1 { config, pkgs, resources, name, lib, nixpkgs, secrets, ... }:
   2 {
   3   # ssh-keyscan backup-2 | nix-shell -p ssh-to-age --run ssh-to-age
   4   secrets.ageKeys = [ "age1kk3nr27qu42j28mcfdag5lhq0zu2pky7gfanvne8l4z2ctevjpgskmw0sr" ];
   5   secrets.keys = {
   6     "rsync_backup/identity" = {
   7       user = "backup";
   8       group = "backup";
   9       permissions = "0400";
  10       text = config.myEnv.rsync_backup.ssh_key.private;
  11     };
  12     "rsync_backup/identity.pub" = {
  13       user = "backup";
  14       group = "backup";
  15       permissions = "0444";
  16       text = config.myEnv.rsync_backup.ssh_key.public;
  17     };
  18   };
  19   boot.kernelPackages = pkgs.linuxPackages_latest;
  20
  21   nixpkgs.config.permittedInsecurePackages = [
  22     "python-2.7.18.6" # for nagios-cli
  23   ];
  24
  25   imports =
  26     [
  27       secrets.nixosModules.users-config-backup-2
  28       (nixpkgs + "/nixos/modules/profiles/qemu-guest.nix")
  29       ./databases/mariadb_replication.nix
  30       ./databases/openldap_replication.nix
  31       ./databases/postgresql_replication.nix
  32       ./databases/redis_replication.nix
  33       ./mail/relay.nix
  34       ./monitoring.nix
  35     ];
  36
  37   fileSystems = {
  38     "/backup2" = {
  39       fsType = "ext4";
  40       device = "UUID=b9425333-f567-435d-94d8-b26c22d93426";
  41     };
  42     "/" = { device = "/dev/sda1"; fsType = "ext4"; };
  43   };
  44
  45   networking = {
  46     firewall.enable = true;
  47     interfaces."ens3".ipv4.addresses = pkgs.lib.flatten (pkgs.lib.attrsets.mapAttrsToList
  48       (n: ips: map (ip: { address = ip; prefixLength = 32; }) (ips.ip4 or []))
  49       (pkgs.lib.attrsets.filterAttrs (n: v: n != "main") config.hostEnv.ips));
  50     interfaces."ens3".ipv6.addresses = pkgs.lib.flatten (pkgs.lib.attrsets.mapAttrsToList
  51       (n: ips: map (ip: { address = ip; prefixLength = (if n == "main" && ip == pkgs.lib.head ips.ip6 then 64 else 128); }) (ips.ip6 or []))
  52       config.hostEnv.ips);
  53     defaultGateway6 = { address = "fe80::1"; interface = "ens3"; };
  54   };
  55
  56   boot.loader.grub.device = "nodev";
  57
  58   security.acme.certs."${name}" = {
  59     group = config.services.nginx.group;
  60   };
  61   services.nginx = {
  62     enable = true;
  63     recommendedOptimisation = true;
  64     recommendedGzipSettings = true;
  65     recommendedProxySettings = true;
  66   };
  67   networking.firewall.allowedTCPPorts = [ 80 443 ];
  68
  69   services.cron = {
  70     mailto = "cron@immae.eu";
  71     enable = true;
  72   };
  73
  74   myServices.chatonsProperties.hostings.rsync-backup = {
  75     file.datetime = "2022-08-27T16:00:00";
  76     hosting = {
  77       name = "Rsync backups";
  78       description = "Remote initiated rsync backups";
  79       website = "backup-2.v.immae.eu";
  80       status.level = "OK";
  81       status.description = "OK";
  82       registration.load = "OPEN";
  83       install.type = "PACKAGE";
  84     };
  85     software = {
  86       name = "rsync";
  87       website = "https://rsync.samba.org/";
  88       license.url = "https://rsync.samba.org/GPL.html";
  89       license.name = "GNU General Public License version 3";
  90       version = pkgs.rsync.version;
  91       source.url = "https://github.com/WayneD/rsync";
  92     };
  93   };
  94
  95   services.rsyncBackup = {
  96     mountpoint = "/backup2";
  97     profiles = config.myEnv.rsync_backup.profiles;
  98     ssh_key_public = config.secrets.fullPaths."rsync_backup/identity.pub";
  99     ssh_key_private = config.secrets.fullPaths."rsync_backup/identity";
 100   };
 101
 102   myServices.mailRelay.enable = true;
 103   myServices.mailBackup.enable = true;
 104   myServices.monitoring.enable = true;
 105   myServices.databasesReplication = {
 106     postgresql = {
 107       enable = true;
 108       base = "/backup2";
 109       mainPackage = pkgs.postgresql;
 110       hosts = {
 111         eldiron = {
 112           slot = "backup_2";
 113           connection = "postgresql://backup-2:${config.hostEnv.ldap.password}@eldiron.immae.eu";
 114           package = pkgs.postgresql;
 115         };
 116       };
 117     };
 118     mariadb = {
 119       enable = true;
 120       base = "/backup2";
 121       hosts = {
 122         eldiron = {
 123           serverId = 2;
 124           # mysql resolves "backup-2" host and checks the ip, but uses /etc/hosts which only contains ip4
 125           host = lib.head config.myEnv.servers.eldiron.ips.main.ip4;
 126           port = config.myEnv.databases.mysql.port;
 127           user = "backup-2";
 128           password = config.hostEnv.ldap.password;
 129           dumpUser = "root";
 130           dumpPassword = config.myEnv.databases.mysql.systemUsers.root;
 131         };
 132       };
 133     };
 134     redis = {
 135       enable = true;
 136       base = "/backup2";
 137       hosts = {
 138         eldiron = {
 139           host = "127.0.0.1";
 140           port = "16379";
 141         };
 142       };
 143     };
 144     openldap = {
 145       enable = true;
 146       base = "/backup2";
 147       hosts = {
 148         eldiron = {
 149           url = "ldaps://${config.myEnv.ldap.host}:636";
 150           dn = config.myEnv.ldap.replication_dn;
 151           password = config.myEnv.ldap.replication_pw;
 152           base = config.myEnv.ldap.base;
 153         };
 154       };
 155     };
 156   };
 157
 158   # This value determines the NixOS release with which your system is
 159   # to be compatible, in order to avoid breaking some software such as
 160   # database servers. You should change this only after NixOS release
 161   # notes say you should.
 162   # https://nixos.org/nixos/manual/release-notes.html
 163   system.stateVersion = "23.05"; # Did you read the comment?
 164 }