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Add anycast_healthchecker module

This commit is contained in:
clerie 2020-12-09 22:44:59 +01:00
parent 6b863caa45
commit 66d21a9688
1 changed files with 122 additions and 0 deletions

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@ -0,0 +1,122 @@
{ config, pkgs, lib, ... }:
with lib;
let
cfg = config.clerie.anycast_healthchecker;
configFile = pkgs.writeText "anycast-healthchecker.conf" ''
[DEFAULT]
interface = lo
[daemon]
pidfile = /run/anycast-healthchecker/anycast-healthchecker.pid
ipv4 = true
ipv6 = true
bird_conf = /var/lib/anycast-healthchecker/anycast-prefixes.conf
bird6_conf = /var/lib/anycast-healthchecker/anycast-prefixes6.conf
bird_variable = ACAST_PS_ADVERTISE
bird6_variable = ACAST6_PS_ADVERTISE
bird_reconfigure_cmd = birdc configure
bird6_reconfigure_cmd = birdc configure
dummy_ip_prefix = 10.189.200.255/32
dummy_ip6_prefix = 2001:db8::1/128
bird_keep_changes = false
bird6_keep_changes = false
bird_changes_counter = 128
bird6_changes_counter = 128
purge_ip_prefixes = false
loglevel = debug
log_maxbytes = 104857600
log_backups = 8
json_stdout = false
json_log_file = false
json_log_server = false
'';
checksDir = pkgs.writeTextDir "checks.conf" (
concatStringsSep "\n" (
mapAttrsToList (
name: check: ''
[${name}]
ip_prefix = ${check.ip_prefix}
check_cmd = ${check.cmd}
'' + (
concatStringsSep "\n" (
optional (check.timeout != null) "check_timeout = ${toString check.timeout}"
++ optional (check.rise != null) "check_rise = ${toString check.rise}"
++ optional (check.fail != null) "check_fail = ${toString check.fail}"
++ optional (check.interval != null) "check_interval = ${toString check.interval}"
)
)
) cfg.checks
)
);
checkOpts = { config, ... }@moduleAttrs: {
options = {
enable = mkOption {
type = types.bool;
default = true;
};
timeout = mkOption {
type = with types; nullOr int;
default = null;
};
rise = mkOption {
type = with types; nullOr int;
default = null;
};
fail = mkOption {
type = with types; nullOr int;
default = null;
};
interval = mkOption {
type = with types; nullOr int;
default = null;
};
ip_prefix = mkOption {
type = types.str;
};
cmd = mkOption {
type = types.str;
default = "${pkgs.curl}/bin/curl --fail --silent http://${moduleAttrs.config.ip_prefix}";
};
};
};
in {
options = {
clerie.anycast_healthchecker = {
enable = mkEnableOption "anycast healthchecker";
checks = mkOption {
type = with types; attrsOf (submodule checkOpts);
};
};
};
config = mkIf cfg.enable {
systemd.services.anycast_healthchecker = {
wantedBy = [ "multi-user.target" ];
serviceConfig = {
RuntimeDirectory = "anycast-healthchecker";
StateDirectory = "anycast-healthchecker";
User = "bird2";
Group = "bird2";
ExecStart = "${pkgs.anycast_healthchecker}/bin/anycast-healthchecker -f ${configFile} -d ${checksDir}";
};
path = with pkgs; [ bird2 ];
};
};
}