Mercurial > prosody-modules

annotate mod_pubsub_alertmanager/mod_pubsub_alertmanager.lua @ 4764:a754f7e380b2

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mod_dnsupdate: Rewrite port config vs DNS comparison code I'm not sure if it was correct, which means it was hard to understand and thus needed to be simplified. Hope this accomplishes that.
author Kim Alvefur <zash@zash.se>
date Mon, 08 Nov 2021 23:03:14 +0100
parents adda872fa9e1
children 67190744b1eb
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43c54a27bab2 mod_pubsub_post: Module to publish to pubsub nodes from a simple HTTP POST
Matthew Wild <mwild1@gmail.com>
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1 local st = require "util.stanza";
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2 local json = require "util.json";
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3 local filters = { --[[ TODO what's useful? ]] };
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4 local render = require "util.interpolation".new("%b{}", tostring, filters);
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5 local uuid_generate = require "util.uuid".generate;
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6
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7 -- TODO alertmanager supports inclusion of HTTP auth and OAuth, worth looking
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8 -- into for using instead of request IP
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9
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10 module:depends("http");
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12 local pubsub_service = module:depends("pubsub").service;
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13
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14 local error_mapping = {
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15 ["forbidden"] = 403;
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16 ["item-not-found"] = 404;
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17 ["internal-server-error"] = 500;
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18 ["conflict"] = 409;
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19 };
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20
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21 local function publish_payload(node, actor, item_id, payload)
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22 local post_item = st.stanza("item", { xmlns = "http://jabber.org/protocol/pubsub", id = item_id, })
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23 :add_child(payload);
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24 local ok, err = pubsub_service:publish(node, actor, item_id, post_item);
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25 module:log("debug", ":publish(%q, true, %q, %s) -> %q", node, item_id, payload:top_tag(), err or "");
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26 if not ok then
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27 return error_mapping[err] or 500;
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28 end
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29 return 202;
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30 end
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31
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32 local node_template = module:get_option_string("alertmanager_node_template", "{path?alerts}");
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33
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34 function handle_POST(event, path)
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35 local request = event.request;
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36
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37 local payload = json.decode(event.request.body);
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38 if type(payload) ~= "table" then return 400; end
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39 if payload.version ~= "4" then return 501; end
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40
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41 for _, alert in ipairs(payload.alerts) do
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42 local item = st.stanza("alerts", {xmlns = "urn:uuid:e3bec775-c607-4e9b-9a3f-94de1316d861:v4", status=alert.status});
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43 for k, v in pairs(alert.annotations) do
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44 item:text_tag("annotation", v, { name=k });
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45 end
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46 for k, v in pairs(alert.labels) do
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47 item:text_tag("label", v, { name=k });
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48 end
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49 item:tag("starts", { at = alert.startsAt}):up();
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50 if alert.endsAt and alert.status == "resolved" then
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51 item:tag("ends", { at = alert.endsAt }):up();
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52 end
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53 if alert.generatorURL then
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54 item:tag("link", { href=alert.generatorURL }):up();
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55 end
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56
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57 local node = render(node_template, {alert = alert, path = path, payload = payload, request = request});
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58 local ret = publish_payload(node, request.ip, uuid_generate(), item);
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59 if ret ~= 202 then
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60 return ret
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61 end
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62 end
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63 return 202;
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64 end
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65
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66 local template = module:get_option_string("alertmanager_body_template", [[
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67 *ALARM!*
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68 Status: {status}
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69 Starts at: {startsAt}{endsAt&
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70 Ends at: {endsAt}}
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71 Labels: {labels%
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72 {idx}: {item}}
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73 Annotations: {annotations%
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74 {idx}: {item}}
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75 ]]);
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76
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77 module:hook("pubsub-summary/urn:uuid:e3bec775-c607-4e9b-9a3f-94de1316d861:v4", function(event)
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78 local payload = event.payload;
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79
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80 local data = {
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81 status = payload.attr.status,
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82 firing = "firing" == payload.attr.status,
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83 resolved = "resolved" == payload.attr.status,
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84 annotations = {},
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85 labels = {},
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86 endsAt = payload:find("ends/@at"),
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87 startsAt = payload:find("starts/@at"),
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88 };
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89 for label in payload:childtags("label") do
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90 data.labels[tostring(label.attr.name)] = label:get_text();
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91 end
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92 for annotation in payload:childtags("annotation") do
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93 data.annotations[tostring(annotation.attr.name)] = annotation:get_text();
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94 end
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95
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96 return render(template, data);
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97 end);
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98
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99 module:provides("http", {
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100 route = {
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101 ["POST /*"] = handle_POST;
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102 ["POST"] = handle_POST;
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103 };
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104 });