From a7206ec3d7029590f083b1286f7cf9e35230230c Mon Sep 17 00:00:00 2001
From: WilliButz <wbutz@cyberfnord.de>
Date: Mon, 5 Aug 2019 17:51:27 +0200
Subject: [PATCH 1/3] prometheus-nextcloud-exporter: init at 2019-10-12

---
 .../prometheus/nextcloud-exporter-deps.nix    | 300 ++++++++++++++++++
 .../prometheus/nextcloud-exporter.nix         |  27 ++
 pkgs/top-level/all-packages.nix               |   1 +
 3 files changed, 328 insertions(+)
 create mode 100644 pkgs/servers/monitoring/prometheus/nextcloud-exporter-deps.nix
 create mode 100644 pkgs/servers/monitoring/prometheus/nextcloud-exporter.nix

diff --git a/pkgs/servers/monitoring/prometheus/nextcloud-exporter-deps.nix b/pkgs/servers/monitoring/prometheus/nextcloud-exporter-deps.nix
new file mode 100644
index 00000000000..bca32bdeccf
--- /dev/null
+++ b/pkgs/servers/monitoring/prometheus/nextcloud-exporter-deps.nix
@@ -0,0 +1,300 @@
+# file generated from go.mod using vgo2nix (https://github.com/adisbladis/vgo2nix)
+[
+  {
+    goPackagePath = "github.com/beorn7/perks";
+    fetch = {
+      type = "git";
+      url = "https://github.com/beorn7/perks";
+      rev = "v1.0.1";
+      sha256 = "17n4yygjxa6p499dj3yaqzfww2g7528165cl13haj97hlx94dgl7";
+    };
+  }
+  {
+    goPackagePath = "github.com/davecgh/go-spew";
+    fetch = {
+      type = "git";
+      url = "https://github.com/davecgh/go-spew";
+      rev = "v1.1.1";
+      sha256 = "0hka6hmyvp701adzag2g26cxdj47g21x6jz4sc6jjz1mn59d474y";
+    };
+  }
+  {
+    goPackagePath = "github.com/go-kit/kit";
+    fetch = {
+      type = "git";
+      url = "https://github.com/go-kit/kit";
+      rev = "v0.8.0";
+      sha256 = "1rcywbc2pvab06qyf8pc2rdfjv7r6kxdv2v4wnpqnjhz225wqvc0";
+    };
+  }
+  {
+    goPackagePath = "github.com/go-logfmt/logfmt";
+    fetch = {
+      type = "git";
+      url = "https://github.com/go-logfmt/logfmt";
+      rev = "v0.4.0";
+      sha256 = "06smxc112xmixz78nyvk3b2hmc7wasf2sl5vxj1xz62kqcq9lzm9";
+    };
+  }
+  {
+    goPackagePath = "github.com/golang/protobuf";
+    fetch = {
+      type = "git";
+      url = "https://github.com/golang/protobuf";
+      rev = "v1.3.2";
+      sha256 = "1k1wb4zr0qbwgpvz9q5ws9zhlal8hq7dmq62pwxxriksayl6hzym";
+    };
+  }
+  {
+    goPackagePath = "github.com/google/go-cmp";
+    fetch = {
+      type = "git";
+      url = "https://github.com/google/go-cmp";
+      rev = "v0.3.0";
+      sha256 = "1hyxx3434zshl2m9ja78gwlkg1rx9yl6diqa7dnjb31xz5x4gbjj";
+    };
+  }
+  {
+    goPackagePath = "github.com/google/gofuzz";
+    fetch = {
+      type = "git";
+      url = "https://github.com/google/gofuzz";
+      rev = "v1.0.0";
+      sha256 = "0qz439qvccm91w0mmjz4fqgx48clxdwagkvvx89cr43q1d4iry36";
+    };
+  }
+  {
+    goPackagePath = "github.com/json-iterator/go";
+    fetch = {
+      type = "git";
+      url = "https://github.com/json-iterator/go";
+      rev = "v1.1.7";
+      sha256 = "0n79p4s67zl5zprxv7diayw3vavnmmfqkmd6snz0i9bxp825dsyz";
+    };
+  }
+  {
+    goPackagePath = "github.com/julienschmidt/httprouter";
+    fetch = {
+      type = "git";
+      url = "https://github.com/julienschmidt/httprouter";
+      rev = "v1.2.0";
+      sha256 = "1k8bylc9s4vpvf5xhqh9h246dl1snxrzzz0614zz88cdh8yzs666";
+    };
+  }
+  {
+    goPackagePath = "github.com/konsorten/go-windows-terminal-sequences";
+    fetch = {
+      type = "git";
+      url = "https://github.com/konsorten/go-windows-terminal-sequences";
+      rev = "v1.0.1";
+      sha256 = "1lchgf27n276vma6iyxa0v1xds68n2g8lih5lavqnx5x6q5pw2ip";
+    };
+  }
+  {
+    goPackagePath = "github.com/kr/logfmt";
+    fetch = {
+      type = "git";
+      url = "https://github.com/kr/logfmt";
+      rev = "b84e30acd515";
+      sha256 = "02ldzxgznrfdzvghfraslhgp19la1fczcbzh7wm2zdc6lmpd1qq9";
+    };
+  }
+  {
+    goPackagePath = "github.com/matttproud/golang_protobuf_extensions";
+    fetch = {
+      type = "git";
+      url = "https://github.com/matttproud/golang_protobuf_extensions";
+      rev = "v1.0.1";
+      sha256 = "1d0c1isd2lk9pnfq2nk0aih356j30k3h1gi2w0ixsivi5csl7jya";
+    };
+  }
+  {
+    goPackagePath = "github.com/modern-go/concurrent";
+    fetch = {
+      type = "git";
+      url = "https://github.com/modern-go/concurrent";
+      rev = "bacd9c7ef1dd";
+      sha256 = "0s0fxccsyb8icjmiym5k7prcqx36hvgdwl588y0491gi18k5i4zs";
+    };
+  }
+  {
+    goPackagePath = "github.com/modern-go/reflect2";
+    fetch = {
+      type = "git";
+      url = "https://github.com/modern-go/reflect2";
+      rev = "v1.0.1";
+      sha256 = "06a3sablw53n1dqqbr2f53jyksbxdmmk8axaas4yvnhyfi55k4lf";
+    };
+  }
+  {
+    goPackagePath = "github.com/mwitkow/go-conntrack";
+    fetch = {
+      type = "git";
+      url = "https://github.com/mwitkow/go-conntrack";
+      rev = "cc309e4a2223";
+      sha256 = "0nbrnpk7bkmqg9mzwsxlm0y8m7s9qd9phr1q30qlx2qmdmz7c1mf";
+    };
+  }
+  {
+    goPackagePath = "github.com/pkg/errors";
+    fetch = {
+      type = "git";
+      url = "https://github.com/pkg/errors";
+      rev = "v0.8.0";
+      sha256 = "001i6n71ghp2l6kdl3qq1v2vmghcz3kicv9a5wgcihrzigm75pp5";
+    };
+  }
+  {
+    goPackagePath = "github.com/pmezard/go-difflib";
+    fetch = {
+      type = "git";
+      url = "https://github.com/pmezard/go-difflib";
+      rev = "v1.0.0";
+      sha256 = "0c1cn55m4rypmscgf0rrb88pn58j3ysvc2d0432dp3c6fqg6cnzw";
+    };
+  }
+  {
+    goPackagePath = "github.com/prometheus/client_golang";
+    fetch = {
+      type = "git";
+      url = "https://github.com/prometheus/client_golang";
+      rev = "v1.1.0";
+      sha256 = "1r0irxkmfnj6ininb06w6ybknini5lz02idawrbkk2i5lq1qcvvf";
+    };
+  }
+  {
+    goPackagePath = "github.com/prometheus/client_model";
+    fetch = {
+      type = "git";
+      url = "https://github.com/prometheus/client_model";
+      rev = "14fe0d1b01d4";
+      sha256 = "0zdmk6rbbx39cvfz0r59v2jg5sg9yd02b4pds5n5llgvivi99550";
+    };
+  }
+  {
+    goPackagePath = "github.com/prometheus/common";
+    fetch = {
+      type = "git";
+      url = "https://github.com/prometheus/common";
+      rev = "v0.6.0";
+      sha256 = "1q16br348117ffycxdwsldb0i39p34miclfa8z93k6vjwnrqbh2l";
+    };
+  }
+  {
+    goPackagePath = "github.com/prometheus/procfs";
+    fetch = {
+      type = "git";
+      url = "https://github.com/prometheus/procfs";
+      rev = "v0.0.3";
+      sha256 = "18c4m795fwng8f8qa395f3crvamlbk5y5afk8b5rzyisnmjq774y";
+    };
+  }
+  {
+    goPackagePath = "github.com/sirupsen/logrus";
+    fetch = {
+      type = "git";
+      url = "https://github.com/sirupsen/logrus";
+      rev = "v1.2.0";
+      sha256 = "0r6334x2bls8ddznvzaldx4g88msjjns4mlks95rqrrg7h0ijigg";
+    };
+  }
+  {
+    goPackagePath = "github.com/spf13/pflag";
+    fetch = {
+      type = "git";
+      url = "https://github.com/spf13/pflag";
+      rev = "v1.0.3";
+      sha256 = "1cj3cjm7d3zk0mf1xdybh0jywkbbw7a6yr3y22x9sis31scprswd";
+    };
+  }
+  {
+    goPackagePath = "github.com/stretchr/objx";
+    fetch = {
+      type = "git";
+      url = "https://github.com/stretchr/objx";
+      rev = "v0.1.1";
+      sha256 = "0iph0qmpyqg4kwv8jsx6a56a7hhqq8swrazv40ycxk9rzr0s8yls";
+    };
+  }
+  {
+    goPackagePath = "github.com/stretchr/testify";
+    fetch = {
+      type = "git";
+      url = "https://github.com/stretchr/testify";
+      rev = "v1.3.0";
+      sha256 = "0wjchp2c8xbgcbbq32w3kvblk6q6yn533g78nxl6iskq6y95lxsy";
+    };
+  }
+  {
+    goPackagePath = "golang.org/x/crypto";
+    fetch = {
+      type = "git";
+      url = "https://go.googlesource.com/crypto";
+      rev = "c2843e01d9a2";
+      sha256 = "01xgxbj5r79nmisdvpq48zfy8pzaaj90bn6ngd4nf33j9ar1dp8r";
+    };
+  }
+  {
+    goPackagePath = "golang.org/x/net";
+    fetch = {
+      type = "git";
+      url = "https://go.googlesource.com/net";
+      rev = "d28f0bde5980";
+      sha256 = "18xj31h70m7xxb7gc86n9i21w6d7djbjz67zfaljm4jqskz6hxkf";
+    };
+  }
+  {
+    goPackagePath = "golang.org/x/sync";
+    fetch = {
+      type = "git";
+      url = "https://go.googlesource.com/sync";
+      rev = "37e7f081c4d4";
+      sha256 = "1bb0mw6ckb1k7z8v3iil2qlqwfj408fvvp8m1cik2b46p7snyjhm";
+    };
+  }
+  {
+    goPackagePath = "golang.org/x/sys";
+    fetch = {
+      type = "git";
+      url = "https://go.googlesource.com/sys";
+      rev = "4e8604ab3aff";
+      sha256 = "1y4nvb8xqk3gzmkk3pc0bdphxbnphz71cld9i6f75js01pggaspc";
+    };
+  }
+  {
+    goPackagePath = "golang.org/x/text";
+    fetch = {
+      type = "git";
+      url = "https://go.googlesource.com/text";
+      rev = "v0.3.0";
+      sha256 = "0r6x6zjzhr8ksqlpiwm5gdd7s209kwk5p4lw54xjvz10cs3qlq19";
+    };
+  }
+  {
+    goPackagePath = "gopkg.in/alecthomas/kingpin.v2";
+    fetch = {
+      type = "git";
+      url = "https://gopkg.in/alecthomas/kingpin.v2";
+      rev = "v2.2.6";
+      sha256 = "0mndnv3hdngr3bxp7yxfd47cas4prv98sqw534mx7vp38gd88n5r";
+    };
+  }
+  {
+    goPackagePath = "gopkg.in/check.v1";
+    fetch = {
+      type = "git";
+      url = "https://gopkg.in/check.v1";
+      rev = "20d25e280405";
+      sha256 = "0k1m83ji9l1a7ng8a7v40psbymxasmssbrrhpdv2wl4rhs0nc3np";
+    };
+  }
+  {
+    goPackagePath = "gopkg.in/yaml.v2";
+    fetch = {
+      type = "git";
+      url = "https://gopkg.in/yaml.v2";
+      rev = "v2.2.1";
+      sha256 = "0dwjrs2lp2gdlscs7bsrmyc5yf6mm4fvgw71bzr9mv2qrd2q73s1";
+    };
+  }
+]
diff --git a/pkgs/servers/monitoring/prometheus/nextcloud-exporter.nix b/pkgs/servers/monitoring/prometheus/nextcloud-exporter.nix
new file mode 100644
index 00000000000..61b891fa3a9
--- /dev/null
+++ b/pkgs/servers/monitoring/prometheus/nextcloud-exporter.nix
@@ -0,0 +1,27 @@
+{ lib, fetchFromGitHub, buildGoPackage }:
+
+buildGoPackage {
+  pname = "prometheus-nextcloud-exporter";
+  version = "unstable-2019-10-12";
+
+  src = fetchFromGitHub {
+    owner = "xperimental";
+    repo = "nextcloud-exporter";
+    rev = "215c8b6b2daa3125798d883fe222bc419240e7ab";
+    sha256 = "1xpc6q6zp92ckkyd24cfl65vyzjv60qwh44ys6mza4k6yrxhacv4";
+  };
+
+  goPackagePath = "github.com/xperimental/nextcloud-exporter";
+
+  goDeps = ./nextcloud-exporter-deps.nix;
+
+  doCheck = true;
+
+  meta = with lib; {
+    description = "Prometheus exporter for Nextcloud servers.";
+    homepage = "https://github.com/xperimental/nextcloud-exporter";
+    license = licenses.mit;
+    maintainers = with maintainers; [ willibutz ];
+    platforms = platforms.unix;
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 34dc13fcdab..4872e4cd9ab 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -15173,6 +15173,7 @@ in
   prometheus-mesos-exporter = callPackage ../servers/monitoring/prometheus/mesos-exporter.nix { };
   prometheus-minio-exporter = callPackage ../servers/monitoring/prometheus/minio-exporter { };
   prometheus-mysqld-exporter = callPackage ../servers/monitoring/prometheus/mysqld-exporter.nix { };
+  prometheus-nextcloud-exporter = callPackage ../servers/monitoring/prometheus/nextcloud-exporter.nix { };
   prometheus-nginx-exporter = callPackage ../servers/monitoring/prometheus/nginx-exporter.nix { };
   prometheus-node-exporter = callPackage ../servers/monitoring/prometheus/node-exporter.nix { };
   prometheus-openvpn-exporter = callPackage ../servers/monitoring/prometheus/openvpn-exporter.nix { };

From d953d328ca9025c7e06a9acd0fe37e7ea341ed00 Mon Sep 17 00:00:00 2001
From: WilliButz <wbutz@cyberfnord.de>
Date: Sat, 12 Oct 2019 22:35:15 +0200
Subject: [PATCH 2/3] nixos/prometheus-nextcloud-exporter: add module

---
 .../monitoring/prometheus/exporters.nix       |  1 +
 .../prometheus/exporters/nextcloud.nix        | 58 +++++++++++++++++++
 2 files changed, 59 insertions(+)
 create mode 100644 nixos/modules/services/monitoring/prometheus/exporters/nextcloud.nix

diff --git a/nixos/modules/services/monitoring/prometheus/exporters.nix b/nixos/modules/services/monitoring/prometheus/exporters.nix
index 84486aa98a4..35b513bac57 100644
--- a/nixos/modules/services/monitoring/prometheus/exporters.nix
+++ b/nixos/modules/services/monitoring/prometheus/exporters.nix
@@ -30,6 +30,7 @@ let
     "json"
     "mail"
     "minio"
+    "nextcloud"
     "nginx"
     "node"
     "postfix"
diff --git a/nixos/modules/services/monitoring/prometheus/exporters/nextcloud.nix b/nixos/modules/services/monitoring/prometheus/exporters/nextcloud.nix
new file mode 100644
index 00000000000..5f9a52053f7
--- /dev/null
+++ b/nixos/modules/services/monitoring/prometheus/exporters/nextcloud.nix
@@ -0,0 +1,58 @@
+{ config, lib, pkgs, options }:
+
+with lib;
+
+let
+  cfg = config.services.prometheus.exporters.nextcloud;
+in
+{
+  port = 9205;
+  extraOpts = {
+    url = mkOption {
+      type = types.str;
+      example = "https://domain.tld";
+      description = ''
+        URL to the Nextcloud serverinfo page.
+        Adding the path to the serverinfo API is optional, it defaults
+        to <literal>/ocs/v2.php/apps/serverinfo/api/v1/info</literal>.
+      '';
+    };
+    username = mkOption {
+      type = types.str;
+      default = "nextcloud-exporter";
+      description = ''
+        Username for connecting to Nextcloud.
+        Note that this account needs to have admin privileges in Nextcloud.
+      '';
+    };
+    passwordFile = mkOption {
+      type = types.path;
+      example = "/path/to/password-file";
+      description = ''
+        File containing the password for connecting to Nextcloud.
+        Make sure that this file is readable by the exporter user.
+      '';
+    };
+    timeout = mkOption {
+      type = types.str;
+      default = "5s";
+      description = ''
+        Timeout for getting server info document.
+      '';
+    };
+  };
+  serviceOpts = {
+    serviceConfig = {
+      DynamicUser = false;
+      ExecStart = ''
+        ${pkgs.prometheus-nextcloud-exporter}/bin/nextcloud-exporter \
+          -a ${cfg.listenAddress}:${toString cfg.port} \
+          -u ${cfg.username} \
+          -t ${cfg.timeout} \
+          -l ${cfg.url} \
+          -p @${cfg.passwordFile} \
+          ${concatStringsSep " \\\n  " cfg.extraFlags}
+      '';
+    };
+  };
+}

From 91b2c844dffc2ee57dcf5121714d295652251f7c Mon Sep 17 00:00:00 2001
From: WilliButz <wbutz@cyberfnord.de>
Date: Sat, 12 Oct 2019 22:35:30 +0200
Subject: [PATCH 3/3] nixos/tests/prometheus-exporters: add nextcloud exporter

---
 nixos/tests/prometheus-exporters.nix | 34 ++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/nixos/tests/prometheus-exporters.nix b/nixos/tests/prometheus-exporters.nix
index 9826b56b74d..676183f6356 100644
--- a/nixos/tests/prometheus-exporters.nix
+++ b/nixos/tests/prometheus-exporters.nix
@@ -229,6 +229,40 @@ let
       '';
     };
 
+    nextcloud = {
+      exporterConfig = {
+        enable = true;
+        passwordFile = "/var/nextcloud-pwfile";
+        url = "http://localhost/negative-space.xml";
+      };
+      metricProvider = {
+        systemd.services.nc-pwfile = let
+          passfile = (pkgs.writeText "pwfile" "snakeoilpw");
+        in {
+          requiredBy = [ "prometheus-nextcloud-exporter.service" ];
+          before = [ "prometheus-nextcloud-exporter.service" ];
+          serviceConfig.ExecStart = ''
+            ${pkgs.coreutils}/bin/install -o nextcloud-exporter -m 0400 ${passfile} /var/nextcloud-pwfile
+          '';
+        };
+        services.nginx = {
+          enable = true;
+          virtualHosts."localhost" = {
+            basicAuth.nextcloud-exporter = "snakeoilpw";
+            locations."/" = {
+              root = "${pkgs.prometheus-nextcloud-exporter.src}/serverinfo/testdata";
+            };
+          };
+        };
+      };
+      exporterTest = ''
+        waitForUnit("nginx.service")
+        waitForUnit("prometheus-nextcloud-exporter.service")
+        waitForOpenPort(9205)
+        succeed("curl -sSf http://localhost:9205/metrics | grep -q 'nextcloud_up 1'")
+      '';
+    };
+
     nginx = {
       exporterConfig = {
         enable = true;