merge shared into krebs

41 files changed, 1236 insertions, 9 deletions

diff --git a/krebs/1systems/test-all-krebs-modules/config.nix b/krebs/1systems/test-all-krebs-modules/config.nix
new file mode 100644
index 00000000..c0c14b71
--- /dev/null
+++ b/krebs/1systems/test-all-krebs-modules/config.nix
@@ -0,0 +1,55 @@
+{ config, pkgs, lib, ... }:
+let
+  en = { enable = true;};
+in {
+  imports = [
+    <stockholm/krebs>
+    <stockholm/krebs/2configs>
+  ];
+  krebs = {
+    enable = true;
+    build.user = config.krebs.users.krebs;
+    build.host = config.krebs.hosts.test-all-krebs-modules;
+    Reaktor.test = {};
+    apt-cacher-ng.enable = true;
+    backup.enable = true;
+    bepasty.enable = true;
+    # FIXME fast-tests / instantiate-test-all-modules fails at wolfbot
+    # http://wolf:8010/builders/fast-tests/builds/442
+    #buildbot.master.enable = true;
+    buildbot.worker = {
+      enable = true;
+      username = "lol";
+      password = "wut";
+    };
+    # XXX exim-retiolum and exim-smarthost are mutually exclusive
+    #exim-retiolum = {
+    #  enable = true;
+    #  primary_hostname = "test.r";
+    #};
+    exim-smarthost = {
+      enable = true;
+      primary_hostname = "test.r";
+      system-aliases = [ { from = "dick"; to = "butt"; } ];
+    };
+    go.enable = true;
+    iptables = {
+      enable = true;
+      tables = {};
+    };
+    realwallpaper.enable = true;
+    tinc.retiolum.enable = true;
+    retiolum-bootstrap.enable = true;
+    tinc_graphs.enable = true;
+    urlwatch.enable = true;
+    fetchWallpaper = {
+      enable = true;
+      url ="localhost";
+    };
+  };
+  # just get the system running
+  boot.loader.grub.devices = ["/dev/sda"];
+  fileSystems."/" = {
+    device = "/dev/lol";
+  };
+}
diff --git a/krebs/1systems/test-all-krebs-modules/source.nix b/krebs/1systems/test-all-krebs-modules/source.nix
new file mode 100644
index 00000000..66fdaa77
--- /dev/null
+++ b/krebs/1systems/test-all-krebs-modules/source.nix
@@ -0,0 +1,3 @@
+import <stockholm/krebs/source.nix> {
+  name = "test-all-krebs-modules";
+}
diff --git a/krebs/1systems/test-arch/config.nix b/krebs/1systems/test-arch/config.nix
new file mode 100644
index 00000000..b5a4234e
--- /dev/null
+++ b/krebs/1systems/test-arch/config.nix
@@ -0,0 +1,33 @@
+{ config, pkgs, ... }:
+
+{
+  imports = [
+    <stockholm/krebs>
+    <stockholm/krebs/2configs>
+    {
+      boot.loader.grub = {
+        device = "/dev/sda";
+        splashImage = null;
+      };
+
+      boot.initrd.availableKernelModules = [
+        "ata_piix"
+        "vmw_pvscsi"
+      ];
+
+      fileSystems."/" = {
+        device = "/dev/sda1";
+      };
+    }
+    {
+      networking.dhcpcd.allowInterfaces = [
+        "enp*"
+      ];
+    }
+    {
+      sound.enable = false;
+    }
+  ];
+
+  krebs.build.host = config.krebs.hosts.test-arch;
+}
diff --git a/krebs/1systems/test-arch/source.nix b/krebs/1systems/test-arch/source.nix
new file mode 100644
index 00000000..bff9d432
--- /dev/null
+++ b/krebs/1systems/test-arch/source.nix
@@ -0,0 +1,3 @@
+import <stockholm/krebs/source.nix> {
+  name = "test-arch";
+}
diff --git a/krebs/1systems/test-centos6/config.nix b/krebs/1systems/test-centos6/config.nix
new file mode 100644
index 00000000..968f8b8f
--- /dev/null
+++ b/krebs/1systems/test-centos6/config.nix
@@ -0,0 +1,31 @@
+{ config, lib, pkgs, ... }:
+
+let
+  inherit (lib) head;
+
+  ip = "168.235.148.52";
+  gw = "168.235.148.1";
+in {
+  imports = [
+    <stockholm/krebs>
+    <stockholm/krebs/2configs>
+    <stockholm/krebs/2configs/os-templates/CAC-CentOS-6.5-64bit.nix>
+    {
+      networking.interfaces.enp11s0.ip4 = [
+        {
+          address = ip;
+          prefixLength = 24;
+        }
+      ];
+      networking.defaultGateway = gw;
+      networking.nameservers = [
+        "8.8.8.8"
+      ];
+    }
+    {
+      sound.enable = false;
+    }
+  ];
+
+  krebs.build.host = config.krebs.hosts.test-centos6;
+}
diff --git a/krebs/1systems/test-centos6/source.nix b/krebs/1systems/test-centos6/source.nix
new file mode 100644
index 00000000..3693bbb2
--- /dev/null
+++ b/krebs/1systems/test-centos6/source.nix
@@ -0,0 +1,3 @@
+import <stockholm/krebs/source.nix> {
+  name = "test-centos6";
+}
diff --git a/krebs/1systems/test-centos7/config.nix b/krebs/1systems/test-centos7/config.nix
new file mode 100644
index 00000000..732bc4f1
--- /dev/null
+++ b/krebs/1systems/test-centos7/config.nix
@@ -0,0 +1,17 @@
+{ config, lib, pkgs, ... }:
+
+let
+  inherit (lib) head;
+
+in {
+  imports = [
+    <stockholm/krebs>
+    <stockholm/krebs/2configs>
+    <stockholm/krebs/2configs/os-templates/CAC-CentOS-7-64bit.nix>
+    <stockholm/krebs/2configs/temp/networking.nix>
+    <stockholm/krebs/2configs/temp/dirs.nix>
+  ];
+
+  sound.enable = false;
+  krebs.build.host = config.krebs.hosts.test-centos7;
+}
diff --git a/krebs/1systems/test-centos7/source.nix b/krebs/1systems/test-centos7/source.nix
new file mode 100644
index 00000000..44230f08
--- /dev/null
+++ b/krebs/1systems/test-centos7/source.nix
@@ -0,0 +1,3 @@
+import <stockholm/krebs/source.nix> {
+  name = "test-centos7";
+}
diff --git a/krebs/1systems/test-failing/config.nix b/krebs/1systems/test-failing/config.nix
new file mode 100644
index 00000000..0dc8e6bf
--- /dev/null
+++ b/krebs/1systems/test-failing/config.nix
@@ -0,0 +1,10 @@
+{ config, pkgs, ... }:
+
+{
+  imports = [
+    <stockholm/krebs>
+    <stockholm/krebs/2configs>
+  ];
+  programs.ssh.startAgent = true;
+  programs.ssh.startAgent = false;
+}
diff --git a/krebs/1systems/test-failing/source.nix b/krebs/1systems/test-failing/source.nix
new file mode 100644
index 00000000..60b77a0a
--- /dev/null
+++ b/krebs/1systems/test-failing/source.nix
@@ -0,0 +1,3 @@
+import <stockholm/krebs/source.nix> {
+  name = "test-failing";
+}
diff --git a/krebs/1systems/test-minimal-deploy/config.nix b/krebs/1systems/test-minimal-deploy/config.nix
new file mode 100644
index 00000000..9974b4f7
--- /dev/null
+++ b/krebs/1systems/test-minimal-deploy/config.nix
@@ -0,0 +1,17 @@
+{ config, pkgs, lib, ... }:
+{
+  imports = [
+    <stockholm/krebs>
+    <stockholm/krebs/2configs>
+  ];
+  krebs = {
+    enable = true;
+    build.user = config.krebs.users.krebs;
+    build.host = config.krebs.hosts.test-all-krebs-modules;
+  };
+  # just get the system to eval in nixos without errors
+  boot.loader.grub.devices = ["/dev/sda"];
+  fileSystems."/" = {
+    device = "/dev/lol";
+  };
+}
diff --git a/krebs/1systems/test-minimal-deploy/source.nix b/krebs/1systems/test-minimal-deploy/source.nix
new file mode 100644
index 00000000..032ab12b
--- /dev/null
+++ b/krebs/1systems/test-minimal-deploy/source.nix
@@ -0,0 +1,3 @@
+import <stockholm/krebs/source.nix> {
+  name = "test-minimal-deploy";
+}
diff --git a/krebs/1systems/wolf/config.nix b/krebs/1systems/wolf/config.nix
new file mode 100644
index 00000000..b8cc1b4a
--- /dev/null
+++ b/krebs/1systems/wolf/config.nix
@@ -0,0 +1,108 @@
+{ config, pkgs, ... }:
+let
+  shack-ip = config.krebs.build.host.nets.shack.ip4.addr;
+in
+{
+  imports = [
+    <stockholm/krebs>
+    <stockholm/krebs/2configs>
+    <nixpkgs/nixos/modules/profiles/qemu-guest.nix>
+    <stockholm/krebs/2configs/collectd-base.nix>
+    <stockholm/krebs/2configs/central-stats-client.nix>
+    <stockholm/krebs/2configs/save-diskspace.nix>
+
+    <stockholm/krebs/2configs/cgit-mirror.nix>
+    <stockholm/krebs/2configs/graphite.nix>
+    <stockholm/krebs/2configs/repo-sync.nix>
+    <stockholm/krebs/2configs/shared-buildbot.nix>
+
+    <stockholm/krebs/2configs/shack/worlddomination.nix>
+    <stockholm/krebs/2configs/shack/drivedroid.nix>
+    # <stockholm/krebs/2configs/shack/nix-cacher.nix>
+    <stockholm/krebs/2configs/shack/mqtt_sub.nix>
+    <stockholm/krebs/2configs/shack/muell_caller.nix>
+    <stockholm/krebs/2configs/shack/radioactive.nix>
+    <stockholm/krebs/2configs/shack/share.nix>
+
+  ];
+  # use your own binary cache, fallback use cache.nixos.org (which is used by
+  # apt-cacher-ng in first place)
+
+  services.influxdb.enable = true;
+
+  # local discovery in shackspace
+  nixpkgs.config.packageOverrides = pkgs: { tinc = pkgs.tinc_pre; };
+  krebs.tinc.retiolum.extraConfig = "TCPOnly = yes";
+  services.grafana = {
+    enable = true;
+    addr = "0.0.0.0";
+    users.allowSignUp = true;
+    users.allowOrgCreate = true;
+    users.autoAssignOrg = true;
+    auth.anonymous.enable = true;
+    security = import <secrets/grafana_security.nix>;
+  };
+
+  nix = {
+    # use the up to date prism cache
+    binaryCaches = [
+      "http://cache.prism.r"
+      "https://cache.nixos.org/"
+    ];
+    binaryCachePublicKeys = [
+      "cache.prism-1:+S+6Lo/n27XEtvdlQKuJIcb1yO5NUqUCE2lolmTgNJU="
+      "hydra.nixos.org-1:CNHJZBh9K4tP3EKF6FkkgeVYsS3ohTl+oS0Qa8bezVs="
+    ];
+  };
+
+  networking = {
+    firewall.enable = false;
+    firewall.allowedTCPPorts = [ 8088 8086 8083 ];
+    interfaces.enp0s3.ip4 = [{
+      address = shack-ip;
+      prefixLength = 20;
+    }];
+
+    defaultGateway = "10.42.0.1";
+    nameservers = [ "10.42.0.100" "10.42.0.200" ];
+  };
+
+  #####################
+  # uninteresting stuff
+  #####################
+  krebs.build.host = config.krebs.hosts.wolf;
+
+  boot.kernel.sysctl = {
+    # Enable IPv6 Privacy Extensions
+    "net.ipv6.conf.all.use_tempaddr" = 2;
+    "net.ipv6.conf.default.use_tempaddr" = 2;
+  };
+
+  boot.initrd.availableKernelModules = [
+    "ata_piix" "uhci_hcd" "ehci_pci" "virtio_pci" "virtio_blk"
+  ];
+  boot.kernelModules = [ ];
+  boot.extraModulePackages = [ ];
+
+  boot.loader.grub.enable = true;
+  boot.loader.grub.version = 2;
+  boot.loader.grub.device = "/dev/vda";
+
+  fileSystems."/" = { device = "/dev/disk/by-label/nixos"; fsType = "ext4"; };
+
+  swapDevices = [
+    { device = "/dev/disk/by-label/swap";  }
+  ];
+  # fallout of ipv6calypse
+  networking.extraHosts = ''
+    hass.shack    10.42.2.191
+    heidi.shack   10.42.2.135
+  '';
+
+  users.extraUsers.root.openssh.authorizedKeys.keys = [
+    config.krebs.users.ulrich.pubkey
+  ];
+
+  time.timeZone = "Europe/Berlin";
+  sound.enable = false;
+}
diff --git a/krebs/1systems/wolf/source.nix b/krebs/1systems/wolf/source.nix
new file mode 100644
index 00000000..c292bfa6
--- /dev/null
+++ b/krebs/1systems/wolf/source.nix
@@ -0,0 +1,3 @@
+import <stockholm/krebs/source.nix> {
+  name = "wolf";
+}
diff --git a/krebs/2configs/central-stats-client.nix b/krebs/2configs/central-stats-client.nix
new file mode 100644
index 00000000..0412eba9
--- /dev/null
+++ b/krebs/2configs/central-stats-client.nix
@@ -0,0 +1,68 @@
+{pkgs, config, ...}:
+{
+  services.collectd = {
+    enable = true;
+    autoLoadPlugin = true;
+    extraConfig = ''
+      Hostname ${config.krebs.build.host.name}
+      LoadPlugin load
+      LoadPlugin disk
+      LoadPlugin memory
+      LoadPlugin df
+      Interval 30.0
+
+      LoadPlugin interface
+      <Plugin "interface">
+        Interface "*Link"
+        Interface "lo"
+        Interface "vboxnet*"
+        Interface "virbr*"
+        IgnoreSelected true
+      </Plugin>
+
+      LoadPlugin df
+      <Plugin "df">
+        MountPoint "/nix/store"
+        # MountPoint "/run*"
+        # MountPoint "/sys*"
+        # MountPoint "/dev"
+        # MountPoint "/dev/shm"
+        # MountPoint "/tmp"
+        FSType "tmpfs"
+        FSType "binfmt_misc"
+        FSType "debugfs"
+        FSType "mqueue"
+        FSType "hugetlbfs"
+        FSType "systemd-1"
+        FSType "cgroup"
+        FSType "securityfs"
+        FSType "ramfs"
+        FSType "proc"
+        FSType "devpts"
+        FSType "devtmpfs"
+        MountPoint "/var/lib/docker/devicemapper"
+        IgnoreSelected true
+      </Plugin>
+
+      LoadPlugin cpu
+      <Plugin cpu>
+        ReportByCpu true
+        ReportByState true
+        ValuesPercentage true
+      </Plugin>
+
+      LoadPlugin network
+      <Plugin "network">
+          Server "stats.makefu.r" "25826"
+      </Plugin>
+
+      LoadPlugin curl
+      <Plugin curl>
+        <Page "smarthome">
+          URL "http://smarthome.shack/";
+          MeasureResponseTime true
+        </Page>
+      </Plugin>
+    '';
+  };
+}
diff --git a/krebs/2configs/cgit-mirror.nix b/krebs/2configs/cgit-mirror.nix
new file mode 100644
index 00000000..c2326a5c
--- /dev/null
+++ b/krebs/2configs/cgit-mirror.nix
@@ -0,0 +1,45 @@
+{ config, lib, pkgs, ... }:
+
+with import <stockholm/lib>;
+let
+  rules = with git; singleton {
+    user = [ wolf-repo-sync ];
+    repo = [ stockholm-mirror ];
+    perm = push ''refs/*'' [ non-fast-forward create delete merge ];
+  };
+
+  stockholm-mirror = {
+    public = true;
+    name = "stockholm-mirror";
+    cgit.desc = "mirror for all stockholm branches";
+    hooks = {
+      post-receive = pkgs.git-hooks.irc-announce {
+        nick = config.networking.hostName;
+        verbose = false;
+        channel = "#retiolum";
+        server = "ni.r";
+      };
+    };
+  };
+
+  wolf-repo-sync = {
+    name = "wolf-repo-sync";
+    mail = "spam@krebsco.de";
+    # TODO put git-sync pubkey somewhere more appropriate
+    pubkey = ''ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCwuAZB3wtAvBJFYh+gWdyGaZU4mtqM2dFXmh2rORlbXeh02msu1uv07ck1VKkQ4LgvCBcBsAOeVa1NTz99eLqutwgcqMCytvRNUCibcoEWwHObsK53KhDJj+zotwlFhnPPeK9+EpOP4ngh/tprJikttos5BwBwe2K+lfiid3fmVPZcTTYa77nCwijimMvWEx6CEjq1wiXMUc4+qcEn8Swbwomz/EEQdNE2hgoC3iMW9RqduTFdIJWnjVi0KaxenX9CvQRGbVK5SSu2gwzN59D/okQOCP6+p1gL5r3QRHSLSSRiEHctVQTkpKOifrtLZGSr5zArEmLd/cOVyssHQPCX repo-sync@wolf'';
+  };
+
+in {
+  krebs.users.wolf-repo-sync = wolf-repo-sync;
+  krebs.git = {
+    enable = true;
+    cgit = {
+      settings = {
+        root-title = "Shared Repos";
+        root-desc = "keep on krebsing";
+      };
+    };
+    inherit rules;
+    repos.stockholm-mirror = stockholm-mirror;
+  };
+}
diff --git a/krebs/2configs/collectd-base.nix b/krebs/2configs/collectd-base.nix
new file mode 100644
index 00000000..440f83fc
--- /dev/null
+++ b/krebs/2configs/collectd-base.nix
@@ -0,0 +1,41 @@
+{ config, lib, pkgs, ... }:
+
+# TODO: krebs.collectd.plugins
+with import <stockholm/lib>;
+let
+  connect-time-cfg = with pkgs; writeText "collectd-connect-time.conf" ''
+    LoadPlugin python
+    <Plugin python>
+      ModulePath "${collectd-connect-time}/lib/${python.libPrefix}/site-packages/"
+      Import "collectd_connect_time"
+      <Module collectd_connect_time>
+        target "localhost:22" "google.com" "google.de" "gum.r:22" "gum.krebsco.de" "heidi.shack:22" "10.42.0.1:22" "heise.de" "t-online.de"
+        interval 10
+      </Module>
+    </Plugin>
+  '';
+  graphite-cfg = pkgs.writeText "collectd-graphite.conf" ''
+    LoadPlugin write_graphite
+    <Plugin "write_graphite">
+      <Carbon>
+        Host "heidi.shack"
+        Port "2003"
+        Prefix "retiolum."
+        EscapeCharacter "_"
+        StoreRates false
+        AlwaysAppendDS false
+      </Carbon>
+    </Plugin>
+  '';
+in {
+  imports = [ ];
+
+  nixpkgs.config.packageOverrides = pkgs: with pkgs; {
+    collectd = pkgs.collectd.override { python= pkgs.python; };
+  };
+  services.collectd = {
+    enable = true;
+    include = [ (toString connect-time-cfg) (toString graphite-cfg) ];
+  };
+
+}
diff --git a/krebs/2configs/default.nix b/krebs/2configs/default.nix
new file mode 100644
index 00000000..53ad56d6
--- /dev/null
+++ b/krebs/2configs/default.nix
@@ -0,0 +1,51 @@
+{ config, lib, pkgs, ... }:
+
+with import <stockholm/lib>;
+{
+  krebs.enable = true;
+  krebs.tinc.retiolum.enable = true;
+
+  krebs.build.user = mkDefault config.krebs.users.krebs;
+
+  networking.hostName = config.krebs.build.host.name;
+
+  nix.maxJobs = 1;
+  nix.trustedBinaryCaches = [
+    "https://cache.nixos.org"
+    "http://cache.nixos.org"
+    "http://hydra.nixos.org"
+  ];
+  nix.useSandbox = true;
+
+  environment.systemPackages = with pkgs; [
+    git
+    rxvt_unicode.terminfo
+  ];
+
+  programs.ssh.startAgent = false;
+
+  services.openssh = {
+    enable = true;
+    hostKeys = [
+      { type = "ed25519"; path = "/etc/ssh/ssh_host_ed25519_key"; }
+    ];
+  };
+  services.cron.enable = false;
+  services.nscd.enable = false;
+  services.ntp.enable = false;
+
+  users.mutableUsers = false;
+  users.extraUsers.root.openssh.authorizedKeys.keys = [
+    # TODO
+    config.krebs.users.lass.pubkey
+    config.krebs.users.makefu.pubkey
+    # TODO HARDER:
+    config.krebs.users.makefu-omo.pubkey
+    config.krebs.users.tv.pubkey
+  ];
+
+
+  # The NixOS release to be compatible with for stateful data such as databases.
+  system.stateVersion = "15.09";
+
+}
diff --git a/krebs/2configs/graphite.nix b/krebs/2configs/graphite.nix
new file mode 100644
index 00000000..64222e43
--- /dev/null
+++ b/krebs/2configs/graphite.nix
@@ -0,0 +1,93 @@
+{ config, lib, pkgs, ... }:
+
+# graphite-web on port 8080
+# carbon cache on port 2003 (tcp/udp)
+
+# TODO: krebs.graphite.minimal.enable
+# TODO: configure firewall
+with import <stockholm/lib>;
+{
+  imports = [ ];
+
+  services.graphite = {
+    api = {
+      enable = true;
+      listenAddress = "0.0.0.0";
+    };
+    carbon = {
+      enableCache = true;
+      # save disk usage by restricting to 1 bulk update per second
+      config = ''
+        [cache]
+        MAX_CACHE_SIZE = inf
+        MAX_UPDATES_PER_SECOND = 1
+        MAX_CREATES_PER_MINUTE = 50
+        MAX_UPDATES_PER_SECOND_ONSHUTDOWN = 9001
+
+        LOG_CACHE_HITS = False
+        LOG_CACHE_QUEUE_SORTS = False
+        LOG_UPDATES = False
+        LOG_LISTENER_CONNECTIONS = False
+        LOG_CREATES = True
+        '';
+      storageAggregation = ''
+      '';
+      storageSchemas = ''
+        [carbon]
+        pattern = ^carbon\.
+        retentions = 60:90d
+
+
+        [radiation_sensor]
+        pattern = ^sensors\.radiation\.
+        retentions = 1m:30d,5m:180d,10m:3y
+
+        [motion_sensors]
+        pattern = ^sensors\.motion\.
+        retentions = 1s:1h,60s:30d,300s:1y
+
+        [motion_sensors]
+        pattern = ^retiolum\.
+        retentions = 10s:1h,30s:30d,300s:1y
+
+        [homeassistant]
+        pattern = ^homeassistant\.
+        retentions = 10s:24h,30s:30d,300s:1y,3600s:5y
+
+        [ara]
+        pattern = ^ara\.
+        retentions = 60s:30d,300s:1y
+
+        [openweathermap]
+        pattern = ^weather\.openweathermap
+        retentions = 30m:30d,1h:5y
+
+        [stadtklima]
+        pattern = ^weather\.stadtklima-stuttgart
+        retentions = 15m:30d,30m:5y
+
+        [sensebox]
+        pattern = ^weather\.sensebox
+        retentions = 1m:90d,30m:5y
+
+        [elchos]
+        pattern = ^elchos\.
+        retentions = 10s:14d,1m:90d,10m:5y
+
+        [icinga_default]
+        pattern = ^icinga
+        retentions = 10s:14d,5m:90d,10m:5y
+
+        [icinga_internals]
+        pattern = ^icinga.*\.(max_check_attempts|reachable|current_attempt|execution_time|latency|state|state_type)
+        retentions = 5m:7d
+
+        [default]
+        pattern = .*
+        retentions = 60s:30d,300s:1y
+        '';
+    };
+  };
+  systemd.services.carbonCache.serviceConfig.Restart="always";
+  systemd.services.graphiteApi.serviceConfig.Restart="always";
+}
diff --git a/krebs/2configs/os-templates/CAC-CentOS-6.5-64bit.nix b/krebs/2configs/os-templates/CAC-CentOS-6.5-64bit.nix
new file mode 100644
index 00000000..b5ec722a
--- /dev/null
+++ b/krebs/2configs/os-templates/CAC-CentOS-6.5-64bit.nix
@@ -0,0 +1,47 @@
+_:
+
+{
+  boot.loader.grub = {
+    device = "/dev/sda";
+    splashImage = null;
+  };
+
+  boot.initrd.availableKernelModules = [
+    "ata_piix"
+    "vmw_pvscsi"
+  ];
+
+  fileSystems."/" = {
+    device = "/dev/VolGroup/lv_root";
+    fsType = "ext4";
+  };
+
+  fileSystems."/boot" = {
+    device = "/dev/sda1";
+    fsType = "ext4";
+  };
+
+  swapDevices = [
+    { device = "/dev/VolGroup/lv_swap"; }
+  ];
+
+  users.extraGroups = {
+    # ● systemd-tmpfiles-setup.service - Create Volatile Files and Directories
+    #    Loaded: loaded (/nix/store/2l33gg7nmncqkpysq9f5fxyhlw6ncm2j-systemd-217/example/systemd/system/systemd-tmpfiles-setup.service)
+    #    Active: failed (Result: exit-code) since Mon 2015-03-16 10:29:18 UTC; 4s ago
+    #      Docs: man:tmpfiles.d(5)
+    #            man:systemd-tmpfiles(8)
+    #   Process: 19272 ExecStart=/nix/store/2l33gg7nmncqkpysq9f5fxyhlw6ncm2j-systemd-217/bin/systemd-tmpfiles --create --remove --boot --exclude-prefix=/dev (code=exited, status=1/FAILURE)
+    #  Main PID: 19272 (code=exited, status=1/FAILURE)
+    #
+    # Mar 16 10:29:17 cd systemd-tmpfiles[19272]: [/usr/lib/tmpfiles.d/legacy.conf:26] Unknown group 'lock'.
+    # Mar 16 10:29:18 cd systemd-tmpfiles[19272]: Two or more conflicting lines for /var/log/journal configured, ignoring.
+    # Mar 16 10:29:18 cd systemd-tmpfiles[19272]: Two or more conflicting lines for /var/log/journal/7b35116927d74ea58785e00b47ac0f0d configured, ignoring.
+    # Mar 16 10:29:18 cd systemd[1]: systemd-tmpfiles-setup.service: main process exited, code=exited, status=1/FAILURE
+    # Mar 16 10:29:18 cd systemd[1]: Failed to start Create Volatile Files and Directories.
+    # Mar 16 10:29:18 cd systemd[1]: Unit systemd-tmpfiles-setup.service entered failed state.
+    # Mar 16 10:29:18 cd systemd[1]: systemd-tmpfiles-setup.service failed.
+    # warning: error(s) occured while switching to the new configuration
+    lock.gid = 10001;
+  };
+}
diff --git a/krebs/2configs/os-templates/CAC-CentOS-7-64bit.nix b/krebs/2configs/os-templates/CAC-CentOS-7-64bit.nix
new file mode 100644
index 00000000..168d1d97
--- /dev/null
+++ b/krebs/2configs/os-templates/CAC-CentOS-7-64bit.nix
@@ -0,0 +1,47 @@
+_:
+
+{
+  boot.loader.grub = {
+    device = "/dev/sda";
+    splashImage = null;
+  };
+
+  boot.initrd.availableKernelModules = [
+    "ata_piix"
+    "vmw_pvscsi"
+  ];
+
+  fileSystems."/" = {
+    device = "/dev/centos/root";
+    fsType = "xfs";
+  };
+
+  fileSystems."/boot" = {
+    device = "/dev/sda1";
+    fsType = "xfs";
+  };
+
+  swapDevices = [
+    { device = "/dev/centos/swap"; }
+  ];
+
+  users.extraGroups = {
+    # ● systemd-tmpfiles-setup.service - Create Volatile Files and Directories
+    #    Loaded: loaded (/nix/store/2l33gg7nmncqkpysq9f5fxyhlw6ncm2j-systemd-217/example/systemd/system/systemd-tmpfiles-setup.service)
+    #    Active: faile