nixops/modules/databases/postgresql.nix

   1 { lib, pkgs, config, myconfig, mylibs, ... }:
   2 let
   3     cfg = config.services.myDatabases;
   4 in {
   5   options.services.myDatabases = {
   6     postgresql = {
   7       enable = lib.mkOption {
   8         default = cfg.enable;
   9         example = true;
  10         description = "Whether to enable postgresql database";
  11         type = lib.types.bool;
  12       };
  13     };
  14   };
  15
  16   config = lib.mkIf cfg.enable {
  17     nixpkgs.overlays = [ (self: super: rec {
  18       postgresql = postgresql_11;
  19       postgresql_11 = super.postgresql_11.overrideAttrs(old: rec {
  20         passthru = old.passthru // { psqlSchema = "11.0"; };
  21         configureFlags = old.configureFlags ++ [ "--with-pam" ];
  22         buildInputs = (old.buildInputs or []) ++ [ self.pam ];
  23         patches = old.patches ++ [
  24           ./postgresql_run_socket_path.patch
  25         ];
  26       });
  27     }) ];
  28
  29     networking.firewall.allowedTCPPorts = [ 5432 ];
  30
  31     security.acme.certs."postgresql" = config.services.myCertificates.certConfig // {
  32       user = "postgres";
  33       group = "postgres";
  34       plugins = [ "fullchain.pem" "key.pem" "account_key.json" ];
  35       domain = "db-1.immae.eu";
  36       postRun = ''
  37         systemctl reload postgresql.service
  38       '';
  39     };
  40
  41     system.activationScripts.postgresql = ''
  42       install -m 0755 -o postgres -g postgres -d ${myconfig.env.databases.postgresql.socket}
  43       '';
  44
  45     systemd.services.postgresql.serviceConfig.SupplementaryGroups = "keys";
  46     services.postgresql = rec {
  47       enable = cfg.postgresql.enable;
  48       package = pkgs.postgresql;
  49       enableTCPIP = true;
  50       extraConfig = ''
  51         max_connections = 100
  52         wal_level = logical
  53         shared_buffers = 512MB
  54         work_mem = 10MB
  55         max_wal_size = 1GB
  56         min_wal_size = 80MB
  57         log_timezone = 'Europe/Paris'
  58         datestyle = 'iso, mdy'
  59         timezone = 'Europe/Paris'
  60         lc_messages = 'en_US.UTF-8'
  61         lc_monetary = 'en_US.UTF-8'
  62         lc_numeric = 'en_US.UTF-8'
  63         lc_time = 'en_US.UTF-8'
  64         default_text_search_config = 'pg_catalog.english'
  65         ssl = on
  66         ssl_cert_file = '/var/lib/acme/postgresql/fullchain.pem'
  67         ssl_key_file = '/var/lib/acme/postgresql/key.pem'
  68         '';
  69       authentication = ''
  70         local   all     postgres                                ident
  71         local   all     all                                     md5
  72         hostssl all     all     188.165.209.148/32              md5
  73         hostssl all     all     178.33.252.96/32                md5
  74         hostssl all     all     all                             pam
  75         hostssl replication     backup-1        2001:41d0:302:1100::9:e5a9/128  pam pamservice=postgresql_replication
  76         hostssl replication     backup-1        54.37.151.137/32                pam pamservice=postgresql_replication
  77       '';
  78     };
  79
  80     mySecrets.keys = [
  81       {
  82         dest = "postgresql/pam";
  83         permissions = "0400";
  84         group = "postgres";
  85         user = "postgres";
  86         text =  with myconfig.env.databases.postgresql.pam; ''
  87           host ${myconfig.env.ldap.host}
  88           base ${myconfig.env.ldap.base}
  89           binddn ${dn}
  90           bindpw ${password}
  91           pam_filter ${filter}
  92           ssl start_tls
  93         '';
  94       }
  95       {
  96         dest = "postgresql/pam_replication";
  97         permissions = "0400";
  98         group = "postgres";
  99         user = "postgres";
 100         text = ''
 101           host ${myconfig.env.ldap.host}
 102           base ${myconfig.env.ldap.base}
 103           binddn ${myconfig.env.ldap.host_dn}
 104           bindpw ${myconfig.env.ldap.password}
 105           pam_login_attribute cn
 106           ssl start_tls
 107         '';
 108       }
 109     ];
 110
 111     security.pam.services = let
 112       pam_ldap = "${pkgs.pam_ldap}/lib/security/pam_ldap.so";
 113     in [
 114       {
 115         name = "postgresql";
 116         text = ''
 117           auth    required ${pam_ldap} config=/var/secrets/postgresql/pam
 118           account required ${pam_ldap} config=/var/secrets/postgresql/pam
 119           '';
 120       }
 121       {
 122         name = "postgresql_replication";
 123         text = ''
 124           auth    required ${pam_ldap} config=/var/secrets/postgresql/pam_replication
 125           account required ${pam_ldap} config=/var/secrets/postgresql/pam_replication
 126           '';
 127       }
 128     ];
 129   };
 130 }
 131