--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/mod_munin/mod_munin.lua Tue Mar 10 16:39:08 2015 +0100
@@ -0,0 +1,123 @@
+module:set_global();
+
+local s_format = string.format;
+local array = require"util.array";
+local it = require"util.iterators";
+local mt = require"util.multitable";
+local set = require"util.set";
+
+local meta = mt.new(); meta.data = module:shared"meta";
+local data = mt.new(); data.data = module:shared"data";
+
+local munin_listener = {};
+local munin_commands = {};
+
+local node_name = module:get_option_string("munin_node_name", "localhost");
+local ignore_stats = module:get_option_set("munin_ignored_stats", { });
+
+local function clean_fieldname(name)
+ return (name:gsub("[^A-Za-z0-9_]", "_"):gsub("^[^A-Za-z_]", "_%1"));
+end
+
+function munin_listener.onconnect(conn)
+ -- require"core.statsmanager".collect();
+ conn:write("# munin node at "..node_name.."\n");
+end
+
+function munin_listener.onincoming(conn, line)
+ line = line and line:match("^[^\r\n]+");
+ if type(line) ~= "string" then return end
+ -- module:log("debug", "incoming: %q", line);
+ local command = line:match"^%w+";
+ command = munin_commands[command];
+ if not command then
+ conn:write("# Unknown command.\n");
+ return;
+ end
+ local ok, err = pcall(command, conn, line);
+ if not ok then
+ module:log("error", "Error running %q: %s", line, err);
+ conn:close();
+ end
+end
+
+function munin_listener.ondisconnect() end
+
+function munin_commands.cap(conn)
+ conn:write("cap\n");
+end
+
+function munin_commands.list(conn, line)
+ conn:write(array(it.keys(data.data)):concat(" ") .. "\n");
+end
+
+function munin_commands.config(conn, line)
+ -- TODO what exactly?
+ local stat = line:match("%s(%S+)");
+ if not stat then conn:write("# Unknown service\n.\n"); return end
+ for key, name, k, value in meta:iter(stat, "", nil) do
+ conn:write(s_format("%s %s\n", k, value));
+ end
+ for key, name, k, value in meta:iter(stat, nil, nil) do
+ if name ~= "" then
+ conn:write(s_format("%s.%s %s\n", name, k, value));
+ end
+ end
+ conn:write(".\n");
+end
+
+function munin_commands.fetch(conn, line)
+ local stat = line:match("%s(%S+)");
+ if not stat then conn:write("# Unknown service\n.\n"); return end
+ for key, name, value in data:iter(stat, nil) do
+ conn:write(s_format("%s.value %s\n", name, tostring(value)));
+ end
+ conn:write(".\n");
+end
+
+function munin_commands.quit(conn)
+ conn:close();
+end
+
+module:hook("stats-updated", function (event)
+ local all_stats, this = event.stats_extra;
+ local host, sect, name, typ, key;
+ for stat, value in pairs(event.changed_stats) do
+ if not ignore_stats:contains(stat) then
+ this = all_stats[stat];
+ -- module:log("debug", "changed_stats[%q] = %s", stat, tostring(value));
+ host, sect, name, typ = stat:match("^/([^/]+)/([^/]+)/(.+):(%a+)$");
+ if host == nil then
+ sect, name, typ, host = stat:match("^([^.]+)%.([^:]+):(%a+)$");
+ elseif host == "*" then
+ host = nil;
+ end
+ key = clean_fieldname(s_format("%s_%s_%s", host or "global", sect, typ));
+
+ if not meta:get(key) then
+ if host then
+ meta:set(key, "", "graph_title", s_format("%s %s on %s", sect, typ, host));
+ else
+ meta:set(key, "", "graph_title", s_format("Global %s %s", sect, typ, host));
+ end
+ meta:set(key, "", "graph_vlabel", this and this.units or typ);
+ meta:set(key, "", "graph_category", sect);
+
+ meta:set(key, name, "label", name);
+ elseif not meta:get(key, name, "label") then
+ meta:set(key, name, "label", name);
+ end
+
+ data:set(key, name, value);
+ else
+ -- module:log("debug", "Ignoring stat %q", stat);
+ end
+ end
+end);
+
+module:provides("net", {
+ listener = munin_listener;
+ default_mode = "*l";
+ default_port = 4949;
+});
+