Monitoring through Ganglia

5. Ganglia Architecture

7. Ganglia Customized Web Front-end

9. Gmond Gathering & Gmetad Aggregation Agents

15. Gmond – Configuration Example globals { daemonize = yes setuid = yes user = nobody debug_level = 0 max_udp_msg_len = 1472 mute = no deaf = no host_dmax = 0 /*secs */ cleanup_threshold = 300 /*secs */ gexec = no } cluster { name = “My Cluster" owner = “Administrator" latlong = “N37.37 W122.23" url = “http://www.moreinfo.org" } udp_send_channel { mcast_join = 239.2.11.71 port = 8649 ttl = 1 } udp_recv_channel { mcast_join = 239.2.11.71 port = 8649 bind = 239.2.11.71 } tcp_accept_channel { port = 8649 }

18. Gmond – Configuration Example collection_group { collect_once = yes time_threshold = 20 metric { name = "heartbeat" } } collection_group { collect_once = yes time_threshold = 1200 metric { name = "cpu_num" } metric { name = "cpu_speed" } metric { name = "mem_total" } metric { name = "swap_total" } … } collection_group { collect_every = 20 time_threshold = 90 metric { name = "load_one" value_threshold = "1.0" } metric { name = "load_five" value_threshold = "1.0" } … } collection_group { collect_every = 80 time_threshold = 950 metric { name = "proc_run" value_threshold = "1.0" } metric { name = "proc_total" value_threshold = "1.0" } }

21. Gmetad – Configuration Example data_source "my cluster" 10 localhost my.machine.edu:8649 1.2.3.5:8655 data_source "my grid" 50 1.3.4.7:8655 grid.org:8651 grid-backup.org:8651 data_source "another source" 1.3.4.7:8655 1.3.4.8 trusted_hosts 127.0.0.1 169.229.50.165 my.gmetad.org xml_port 8651 interactive_port 8652 rrd_rootdir "/var/lib/ganglia/rrds"

22. Round-Robin Database Storage

26. Extending the Ganglia Monitoring System

31. Gmond Example Module mmodule example_module; static int ex_metric_init (apr_pool_t *p) { apr_array_header_t *list_params = example_module.module_params_list srand(time(NULL)%99); return 0; } static void ex_metric_cleanup ( void ) { } static g_val_t ex_metric_handler ( int metric_index ) { g_val_t val; switch (metric_index) { case 0: val.int32 = rand()%99; return val; case 1: val.int32 = 50; return val; } /* default case */ val.int32 = 0; return val; } static const Ganglia_25metric ex_metric_info [] = { {0, "Random_Numbers", 90, GANGLIA_VALUE_UNSIGNED_INT, "s", both", "%u", UDP_HEADER_SIZE+8, "Example module metric (random numbers)"}, {0, "Constant_Number", 90, GANGLIA_VALUE_UNSIGNED_INT, "Num", "zero", "%hu", UDP_HEADER_SIZE+8, "Example module metric(constant number)"}, {0, NULL} }; mmodule example_module = { STD_MMODULE_STUFF, ex_metric_init, ex_metric_cleanup, ex_metric_info, ex_metric_handler, };

32. Gmond Example Module Configuration modules { module { name = "example_module" path = "/usr/lib/ganglia/modexample.so" Param RandomMax { Value = 75 } Param ConstantValue { Value = 25 } } } /* Define Collection Groups */ collection_group { collect_every = 10 time_threshold = 50 metric { name = "Random_Numbers" value_threshold = 30.0 } } collection_group { collect_once = yes time_threshold = 20 metric { name = "Constant_Number" } }

36. Gmond Python Module Development Curve_Max = 15 v = int(1) inc = int(1) count = 0 def metric_init(params): global Curve_Max if ‘CurveMax’ in params: Curve_Max = int(params[‘CurveMax’]) d = {‘name’: ‘Curve_Metric’, ‘ call_back’: curve_handler, ‘ time_max': int(60), ‘ value_type’: ‘uint’, ‘ units’: ‘Seconds’, ‘ slope’: ‘both’, ‘ format’: ‘%u’, ‘ description’: ‘ Shows a uniform curve’} return d def curve_handler(name): global v,count,inc,Curve_Max v += inc count += 1 if count > Curve_Max: count = 0 inc = -inc return int(v) def metric_cleanup(): pass

39. Questions