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authortv <tv@shackspace.de>2015-07-10 20:58:55 +0200
committertv <tv@shackspace.de>2015-07-10 20:58:55 +0200
commitfe7f9a1f3187d2558a9269f8b0abfb89ba5981c9 (patch)
treec28976195faf0659c06865e870cd033c136ea42b /modules/tv/consul/default.nix
parent310c857e3bb71ac950bea6c9b94f76f1cd5dcf3d (diff)
tv.consul: init
Diffstat (limited to 'modules/tv/consul/default.nix')
-rw-r--r--modules/tv/consul/default.nix123
1 files changed, 123 insertions, 0 deletions
diff --git a/modules/tv/consul/default.nix b/modules/tv/consul/default.nix
new file mode 100644
index 000000000..c7a3da2b7
--- /dev/null
+++ b/modules/tv/consul/default.nix
@@ -0,0 +1,123 @@
+{ config, lib, pkgs, ... }:
+
+# if quorum gets lost, then start any node with a config that doesn't contain bootstrap_expect
+# but -bootstrap
+# TODO consul-bootstrap HOST that actually does is
+# TODO tools to inspect state of a cluster in outage state
+
+with builtins;
+with lib;
+let
+ service-name = "consul";
+
+ cfg = config.tv.consul;
+
+ out = {
+ imports = [ ../../tv/iptables ];
+ options.tv.consul = api;
+ config = mkIf cfg.enable (mkMerge [
+ imp
+ { tv.iptables.input-retiolum-accept-new-tcp = [ "8300" "8301" ]; }
+ # TODO udp for 8301
+ ]);
+ };
+
+ api = {
+ # TODO inherit (lib) api.options.enable; oder so
+ enable = mkOption {
+ type = types.bool;
+ default = false;
+ description = "enable tv.consul";
+ };
+ dc = mkOption {
+ type = types.unspecified;
+ };
+ hosts = mkOption {
+ type = with types; listOf unspecified;
+ };
+ encrypt-file = mkOption {
+ type = types.str; # TODO path (but not just into store)
+ default = "/etc/consul/encrypt.json";
+ };
+ data-dir = mkOption {
+ type = types.str; # TODO path (but not just into store)
+ default = "/var/lib/consul";
+ };
+ self = mkOption {
+ type = types.unspecified;
+ };
+ server = mkOption {
+ type = types.bool;
+ default = false;
+ };
+ GOMAXPROCS = mkOption {
+ type = types.int;
+ default = cfg.self.cores;
+ };
+ };
+
+ consul-config = {
+ datacenter = cfg.dc;
+ data_dir = cfg.data-dir;
+ log_level = "INFO";
+ #node_name =
+ server = cfg.server;
+ bind_addr = cfg.self.addr; # TODO cfg.addr
+ enable_syslog = true;
+ retry_join = map (getAttr "addr") (filter (host: host.fqdn != cfg.self.fqdn) cfg.hosts);
+ leave_on_terminate = true;
+ } // optionalAttrs cfg.server {
+ bootstrap_expect = length cfg.hosts;
+ leave_on_terminate = false;
+ };
+
+ imp = {
+ environment.systemPackages = with pkgs; [
+ consul
+ ];
+
+ systemd.services.consul = {
+ after = [ "network.target" ];
+ wantedBy = [ "multi-user.target" ];
+ path = with pkgs; [
+ consul
+ ];
+ environment = {
+ GOMAXPROCS = toString cfg.GOMAXPROCS;
+ };
+ serviceConfig = {
+ PermissionsStartOnly = "true";
+ SyslogIdentifier = "consul";
+ User = user.name;
+ PrivateTmp = "true";
+ Restart = "always";
+ ExecStartPre = pkgs.writeScript "consul-init" ''
+ #! /bin/sh
+ mkdir -p ${cfg.data-dir}
+ chown consul: ${cfg.data-dir}
+ '';
+ ExecStart = pkgs.writeScript "consul-service" ''
+ #! /bin/sh
+ set -euf
+ exec >/dev/null
+ exec consul agent \
+ -config-file=${toFile "consul.json" (toJSON consul-config)} \
+ -config-file=${cfg.encrypt-file} \
+ '';
+ #-node=${cfg.self.fqdn} \
+ #ExecStart = "${tinc}/sbin/tincd -c ${confDir} -d 0 -U ${user} -D";
+ };
+ };
+
+ users.extraUsers = singleton {
+ inherit (user) name uid;
+ };
+ };
+
+ user = {
+ name = "consul";
+ uid = 2983239726; # genid consul
+ };
+
+in
+out