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authorChristian Pointner <equinox@helsinki.at>2014-03-25 22:04:32 (GMT)
committerChristian Pointner <equinox@helsinki.at>2014-03-25 22:04:32 (GMT)
commitb98afc20e6788df9a6f8ebd2c143cebfd4baf5bc (patch)
treeb3202de2cf9ed68820ff59bd8a05cdc79e034734 /health-watch.lua
parentc4989d4bd8821e3ff853a41b3ff235adcc4fe925 (diff)
added health watch client
Diffstat (limited to 'health-watch.lua')
-rw-r--r--health-watch.lua107
1 files changed, 107 insertions, 0 deletions
diff --git a/health-watch.lua b/health-watch.lua
new file mode 100644
index 0000000..082c19d
--- /dev/null
+++ b/health-watch.lua
@@ -0,0 +1,107 @@
+--
+-- rhctl
+--
+-- Copyright (C) 2009-2014 Christian Pointner <equinox@helsinki.at>
+--
+-- This file is part of rhctl.
+--
+-- rhctl is free software: you can redistribute it and/or modify
+-- it under the terms of the GNU General Public License as published by
+-- the Free Software Foundation, either version 3 of the License, or
+-- any later version.
+--
+-- rhctl is distributed in the hope that it will be useful,
+-- but WITHOUT ANY WARRANTY; without even the implied warranty of
+-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+-- GNU General Public License for more details.
+--
+-- You should have received a copy of the GNU General Public License
+-- along with rhctl. If not, see <http://www.gnu.org/licenses/>.
+--
+
+package.path = package.path .. ';/usr/share/rhctl/?.lua'
+
+socket = require("socket")
+utils = require("utils")
+
+old_state = {}
+current_state = {}
+
+function state_changed()
+ for k,v in pairs(old_state) do
+ if v ~= current_state[k] then
+ return true
+ end
+ end
+ for k,v in pairs(current_state) do
+ if old_state[k] == nil then
+ return true
+ end
+ end
+ return false
+end
+
+function process_cmd(message)
+ local exps = { hs = "^Health: (%a+)$", mc = "^Master: (%a+)$", sc = "^Standby: (%a+)$", hbm = "^Hearbeat Master: (%a+, %a+)$", hbs = "^Hearbeat Standby: (%a+, %a+)$" }
+ for key, exp in pairs(exps) do
+ local state = string.match(message, exp)
+ if(state) then
+ if(key == 'hs') then
+ current_state = {}
+ end
+ current_state[key] = state
+ end
+ end
+
+ if(current_state['hbs'] ~= nil) then
+ if(state_changed()) then
+ body = "RHCTL Health Output:\n\n"
+ body = body .. "Health: " .. current_state['hs'] .. "\n"
+ body = body .. "Master: " .. current_state['mc'] .. "\n"
+ body = body .. "Standby: " .. current_state['sc'] .. "\n"
+ body = body .. "Master Hearbeat: " .. current_state['hbm'] .. "\n"
+ body = body .. "Standby Hearbeat: " .. current_state['hbs'] .. "\n"
+ utils.send_mail("logs@helsinki.at", "[RHCTL] health: " .. current_state['hs'], body)
+ old_state = current_state
+ end
+ end
+
+ return 0
+end
+
+function main_loop(opt)
+ log.printf(log.NOTICE, "main_loop started")
+ local sig = signal.init()
+ local cmdfd = cmd.init()
+
+ cmd.send_string("listen health");
+ cmd.send_string("health");
+
+ local return_value = 0
+ while return_value == 0 do
+ local readable, _, err = socket.select({ sig , cmdfd }, nil)
+ if(err) then
+ log.printf(log.ERROR, "select returned with error: %s", err)
+ return_value = -1
+ else
+ for _, input in ipairs(readable) do
+ if(input == sig) then
+ return_value = signal.handle()
+ if(return_value == 1) then break end
+ else
+ if(input == cmdfd) then
+ return_value = cmd.recv_data(process_cmd)
+ if(return_value ~= 0) then break end
+ else
+ log.printf(log.ERROR, "select returned invalid handle??")
+ return_value = -1
+ break;
+ end
+ end
+ end
+ end
+ end
+
+ signal.stop()
+ return return_value
+end