Move databases configs to modules

[perso/Immae/Config/Nix.git] / modules / private / databases / postgresql.nix

diff --git a/modules/private/databases/postgresql.nix b/modules/private/databases/postgresql.nix
new file mode 100644 (file)
index 0000000..26242a8
--- /dev/null
+++ b/modules/private/databases/postgresql.nix
@@ -0,0 +1,141 @@
+{ lib, pkgs, config, myconfig,  ... }:
+let
+    cfg = config.myServices.databases.postgresql;
+in {
+  options.myServices.databases = {
+    postgresql = {
+      enable = lib.mkOption {
+        default = cfg.enable;
+        example = true;
+        description = "Whether to enable postgresql database";
+        type = lib.types.bool;
+      };
+      # Output variables
+      socketsDir = lib.mkOption {
+        type = lib.types.path;
+        default = "/run/postgresql";
+        description = ''
+          The directory where Postgresql puts sockets.
+          '';
+        readOnly = true;
+      };
+      systemdRuntimeDirectory = lib.mkOption {
+        type = lib.types.str;
+        # Use ReadWritePaths= instead if socketsDir is outside of /run
+        default = assert lib.strings.hasPrefix "/run/" cfg.socketsDir;
+          lib.strings.removePrefix "/run/" cfg.socketsDir;
+        description = ''
+        Adjusted Postgresql sockets directory for systemd
+        '';
+        readOnly = true;
+      };
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    nixpkgs.overlays = [ (self: super: rec {
+      postgresql = self.postgresql_11_custom;
+    }) ];
+
+    networking.firewall.allowedTCPPorts = [ 5432 ];
+
+    security.acme.certs."postgresql" = config.myServices.databasesCerts // {
+      user = "postgres";
+      group = "postgres";
+      plugins = [ "fullchain.pem" "key.pem" "account_key.json" ];
+      domain = "db-1.immae.eu";
+      postRun = ''
+        systemctl reload postgresql.service
+      '';
+    };
+
+    systemd.services.postgresql.serviceConfig = {
+      SupplementaryGroups = "keys";
+      RuntimeDirectory = cfg.systemdRuntimeDirectory;
+    };
+    services.postgresql = rec {
+      enable = true;
+      package = pkgs.postgresql;
+      enableTCPIP = true;
+      extraConfig = ''
+        max_connections = 100
+        wal_level = logical
+        shared_buffers = 512MB
+        work_mem = 10MB
+        max_wal_size = 1GB
+        min_wal_size = 80MB
+        log_timezone = 'Europe/Paris'
+        datestyle = 'iso, mdy'
+        timezone = 'Europe/Paris'
+        lc_messages = 'en_US.UTF-8'
+        lc_monetary = 'en_US.UTF-8'
+        lc_numeric = 'en_US.UTF-8'
+        lc_time = 'en_US.UTF-8'
+        default_text_search_config = 'pg_catalog.english'
+        ssl = on
+        ssl_cert_file = '/var/lib/acme/postgresql/fullchain.pem'
+        ssl_key_file = '/var/lib/acme/postgresql/key.pem'
+        '';
+      authentication = ''
+        local  all     postgres                                ident
+        local  all     all                                     md5
+        hostssl        all     all     188.165.209.148/32              md5
+        hostssl        all     all     178.33.252.96/32                md5
+        hostssl        all     all     all                             pam
+        hostssl        replication     backup-1        2001:41d0:302:1100::9:e5a9/128  pam pamservice=postgresql_replication
+        hostssl        replication     backup-1        54.37.151.137/32                pam pamservice=postgresql_replication
+      '';
+    };
+
+    secrets.keys = [
+      {
+        dest = "postgresql/pam";
+        permissions = "0400";
+        group = "postgres";
+        user = "postgres";
+        text =  with myconfig.env.databases.postgresql.pam; ''
+          host ${myconfig.env.ldap.host}
+          base ${myconfig.env.ldap.base}
+          binddn ${dn}
+          bindpw ${password}
+          pam_filter ${filter}
+          ssl start_tls
+        '';
+      }
+      {
+        dest = "postgresql/pam_replication";
+        permissions = "0400";
+        group = "postgres";
+        user = "postgres";
+        text = ''
+          host ${myconfig.env.ldap.host}
+          base ${myconfig.env.ldap.base}
+          binddn ${myconfig.env.ldap.host_dn}
+          bindpw ${myconfig.env.ldap.password}
+          pam_login_attribute cn
+          ssl start_tls
+        '';
+      }
+    ];
+
+    security.pam.services = let
+      pam_ldap = "${pkgs.pam_ldap}/lib/security/pam_ldap.so";
+    in [
+      {
+        name = "postgresql";
+        text = ''
+          auth    required ${pam_ldap} config=${config.secrets.location}/postgresql/pam
+          account required ${pam_ldap} config=${config.secrets.location}/postgresql/pam
+          '';
+      }
+      {
+        name = "postgresql_replication";
+        text = ''
+          auth    required ${pam_ldap} config=${config.secrets.location}/postgresql/pam_replication
+          account required ${pam_ldap} config=${config.secrets.location}/postgresql/pam_replication
+          '';
+      }
+    ];
+  };
+}
+