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mod_pubsub_alertmanager/mod_pubsub_alertmanager.lua @ 4670:1b81b7269858
mod_http_oauth2: Gracefully handle cache write failure
Would previously have thrown an error and probably returned a traceback.
This would only happen if a *lot* of authorization codes were requested
in a short interval.
author | Kim Alvefur <zash@zash.se> |
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date | Thu, 02 Sep 2021 23:06:58 +0200 |
parent | 4627:adda872fa9e1 |
child | 5485:67190744b1eb |
rev | line source |
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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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11 |
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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 }); |