mirror of
https://github.com/ClusterCockpit/cc-metric-collector.git
synced 2024-09-20 07:27:25 +02:00
305 lines
10 KiB
Go
305 lines
10 KiB
Go
package sinks
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/*
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#cgo CFLAGS: -DGM_PROTOCOL_GUARD
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#cgo LDFLAGS: -L. -lganglia -Wl,--unresolved-symbols=ignore-in-object-files
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#include <stdlib.h>
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// This is a copy&paste snippet of ganglia.h (BSD-3 license)
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// See https://github.com/ganglia/monitor-core
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// for further information
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enum ganglia_slope {
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GANGLIA_SLOPE_ZERO = 0,
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GANGLIA_SLOPE_POSITIVE,
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GANGLIA_SLOPE_NEGATIVE,
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GANGLIA_SLOPE_BOTH,
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GANGLIA_SLOPE_UNSPECIFIED,
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GANGLIA_SLOPE_DERIVATIVE,
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GANGLIA_SLOPE_LAST_LEGAL_VALUE=GANGLIA_SLOPE_DERIVATIVE
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};
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typedef enum ganglia_slope ganglia_slope_t;
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typedef struct Ganglia_pool* Ganglia_pool;
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typedef struct Ganglia_gmond_config* Ganglia_gmond_config;
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typedef struct Ganglia_udp_send_channels* Ganglia_udp_send_channels;
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struct Ganglia_metric {
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Ganglia_pool pool;
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struct Ganglia_metadata_message *msg;
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char *value;
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void *extra;
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};
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typedef struct Ganglia_metric * Ganglia_metric;
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#ifdef __cplusplus
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extern "C" {
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#endif
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Ganglia_gmond_config Ganglia_gmond_config_create(char *path, int fallback_to_default);
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//void Ganglia_gmond_config_destroy(Ganglia_gmond_config config);
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Ganglia_udp_send_channels Ganglia_udp_send_channels_create(Ganglia_pool p, Ganglia_gmond_config config);
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void Ganglia_udp_send_channels_destroy(Ganglia_udp_send_channels channels);
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int Ganglia_udp_send_message(Ganglia_udp_send_channels channels, char *buf, int len );
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Ganglia_metric Ganglia_metric_create( Ganglia_pool parent_pool );
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int Ganglia_metric_set( Ganglia_metric gmetric, char *name, char *value, char *type, char *units, unsigned int slope, unsigned int tmax, unsigned int dmax);
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int Ganglia_metric_send( Ganglia_metric gmetric, Ganglia_udp_send_channels send_channels );
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//int Ganglia_metadata_send( Ganglia_metric gmetric, Ganglia_udp_send_channels send_channels );
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//int Ganglia_metadata_send_real( Ganglia_metric gmetric, Ganglia_udp_send_channels send_channels, char *override_string );
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void Ganglia_metadata_add( Ganglia_metric gmetric, char *name, char *value );
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//int Ganglia_value_send( Ganglia_metric gmetric, Ganglia_udp_send_channels send_channels );
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void Ganglia_metric_destroy( Ganglia_metric gmetric );
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Ganglia_pool Ganglia_pool_create( Ganglia_pool parent );
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void Ganglia_pool_destroy( Ganglia_pool pool );
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//ganglia_slope_t cstr_to_slope(const char* str);
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//const char* slope_to_cstr(unsigned int slope);
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#ifdef __cplusplus
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}
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#endif
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*/
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import "C"
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import (
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"encoding/json"
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"errors"
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"fmt"
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"unsafe"
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lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
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"github.com/NVIDIA/go-nvml/pkg/dl"
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)
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const (
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GANGLIA_LIB_NAME = "libganglia.so"
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GANGLIA_LIB_DL_FLAGS = dl.RTLD_LAZY | dl.RTLD_GLOBAL
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GMOND_CONFIG_FILE = `/etc/ganglia/gmond.conf`
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)
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type LibgangliaSinkSpecialMetric struct {
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MetricName string `json:"metric_name,omitempty"`
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NewName string `json:"new_name,omitempty"`
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Slope string `json:"slope,omitempty"`
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}
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type LibgangliaSinkConfig struct {
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defaultSinkConfig
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GangliaLib string `json:"libganglia_path,omitempty"`
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GmondConfig string `json:"gmond_config,omitempty"`
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AddGangliaGroup bool `json:"add_ganglia_group,omitempty"`
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AddTypeToName bool `json:"add_type_to_name,omitempty"`
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AddUnits bool `json:"add_units,omitempty"`
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ClusterName string `json:"cluster_name,omitempty"`
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SpecialMetrics map[string]LibgangliaSinkSpecialMetric `json:"rename_metrics,omitempty"` // Map to rename metric name from key to value
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//AddTagsAsDesc bool `json:"add_tags_as_desc,omitempty"`
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}
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type LibgangliaSink struct {
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sink
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config LibgangliaSinkConfig
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global_context C.Ganglia_pool
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gmond_config C.Ganglia_gmond_config
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send_channels C.Ganglia_udp_send_channels
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cstrCache map[string]*C.char
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}
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func (s *LibgangliaSink) Init(config json.RawMessage) error {
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var err error = nil
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s.name = "LibgangliaSink"
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//s.config.AddTagsAsDesc = false
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s.config.AddGangliaGroup = false
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s.config.AddTypeToName = false
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s.config.AddUnits = true
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s.config.GmondConfig = string(GMOND_CONFIG_FILE)
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s.config.GangliaLib = string(GANGLIA_LIB_NAME)
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if len(config) > 0 {
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err = json.Unmarshal(config, &s.config)
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if err != nil {
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fmt.Println(s.name, "Error reading config for", s.name, ":", err.Error())
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return err
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}
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}
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lib := dl.New(s.config.GangliaLib, GANGLIA_LIB_DL_FLAGS)
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if lib == nil {
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return fmt.Errorf("error instantiating DynamicLibrary for %s", s.config.GangliaLib)
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}
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// Set up cache for the C strings
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s.cstrCache = make(map[string]*C.char)
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// s.cstrCache["globals"] = C.CString("globals")
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// s.cstrCache["override_hostname"] = C.CString("override_hostname")
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// s.cstrCache["override_ip"] = C.CString("override_ip")
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// Add some constant strings
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s.cstrCache["GROUP"] = C.CString("GROUP")
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s.cstrCache["CLUSTER"] = C.CString("CLUSTER")
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s.cstrCache[""] = C.CString("")
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// Add cluster name for lookup in Write()
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if len(s.config.ClusterName) > 0 {
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s.cstrCache[s.config.ClusterName] = C.CString(s.config.ClusterName)
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}
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// Add supported types for later lookup in Write()
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s.cstrCache["double"] = C.CString("double")
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s.cstrCache["int32"] = C.CString("int32")
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s.cstrCache["string"] = C.CString("string")
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// Create Ganglia pool
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s.global_context = C.Ganglia_pool_create(nil)
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// Load Ganglia configuration
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s.cstrCache[s.config.GmondConfig] = C.CString(s.config.GmondConfig)
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s.gmond_config = C.Ganglia_gmond_config_create(s.cstrCache[s.config.GmondConfig], 0)
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//globals := C.cfg_getsec(gmond_config, s.cstrCache["globals"])
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//override_hostname := C.cfg_getstr(globals, s.cstrCache["override_hostname"])
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//override_ip := C.cfg_getstr(globals, s.cstrCache["override_ip"])
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s.send_channels = C.Ganglia_udp_send_channels_create(s.global_context, s.gmond_config)
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return nil
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}
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func (s *LibgangliaSink) Write(point lp.CCMetric) error {
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var err error = nil
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var c_name *C.char
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var c_value *C.char
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var c_type *C.char
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var c_unit *C.char
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// helper function for looking up C strings in the cache
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lookup := func(key string) *C.char {
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if _, exist := s.cstrCache[key]; !exist {
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s.cstrCache[key] = C.CString(key)
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}
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return s.cstrCache[key]
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}
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// Get metric name
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metricname := GangliaMetricRename(point)
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if s.config.AddTypeToName {
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c_name = lookup(GangliaMetricName(point))
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} else {
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c_name = lookup(metricname)
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}
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// Get the value C string and lookup the type string in the cache
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value, ok := point.GetField("value")
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if !ok {
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return fmt.Errorf("metric %s has no 'value' field", metricname)
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}
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switch real := value.(type) {
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case float64:
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c_value = C.CString(fmt.Sprintf("%f", real))
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c_type = lookup("double")
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case float32:
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c_value = C.CString(fmt.Sprintf("%f", real))
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c_type = lookup("float")
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case int64:
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c_value = C.CString(fmt.Sprintf("%d", real))
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c_type = lookup("int32")
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case int32:
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c_value = C.CString(fmt.Sprintf("%d", real))
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c_type = lookup("int32")
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case int:
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c_value = C.CString(fmt.Sprintf("%d", real))
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c_type = lookup("int32")
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case string:
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c_value = C.CString(real)
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c_type = lookup("string")
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default:
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return fmt.Errorf("metric %s has invalid 'value' type for %s", point.Name(), s.name)
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}
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// Add unit
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if s.config.AddUnits {
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if tagunit, tagok := point.GetTag("unit"); tagok {
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c_unit = lookup(tagunit)
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} else if metaunit, metaok := point.GetMeta("unit"); metaok {
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c_unit = lookup(metaunit)
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} else {
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c_unit = lookup("")
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}
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} else {
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c_unit = lookup("")
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}
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// Determine the slope of the metric. Ganglia's own collector mostly use
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// 'both' but the mem and swap total uses 'zero'.
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slope := GangliaSlopeType(point)
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slope_type := C.GANGLIA_SLOPE_BOTH
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switch slope {
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case 0:
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slope_type = C.GANGLIA_SLOPE_ZERO
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}
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// Create a new Ganglia metric
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gmetric := C.Ganglia_metric_create(s.global_context)
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// Set name, value, type and unit in the Ganglia metric
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// Since we don't have this information from the collectors,
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// we assume that the metric value can go up and down (slope),
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// and there is no maximum for 'dmax' and 'tmax'.
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// Ganglia's collectors set 'tmax' but not 'dmax'
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rval := C.int(0)
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rval = C.Ganglia_metric_set(gmetric, c_name, c_value, c_type, c_unit, C.uint(slope_type), 0, 0)
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switch rval {
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case 1:
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C.free(unsafe.Pointer(c_value))
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return errors.New("invalid parameters")
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case 2:
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C.free(unsafe.Pointer(c_value))
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return errors.New("one of your parameters has an invalid character '\"'")
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case 3:
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C.free(unsafe.Pointer(c_value))
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return fmt.Errorf("the type parameter \"%s\" is not a valid type", C.GoString(c_type))
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case 4:
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C.free(unsafe.Pointer(c_value))
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return fmt.Errorf("the value parameter \"%s\" does not represent a number", C.GoString(c_value))
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default:
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}
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// Set the cluster name, otherwise it takes it from the configuration file
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if len(s.config.ClusterName) > 0 {
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C.Ganglia_metadata_add(gmetric, lookup("CLUSTER"), lookup(s.config.ClusterName))
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}
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// Set the group metadata in the Ganglia metric if configured
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if group, ok := point.GetMeta("group"); ok && s.config.AddGangliaGroup {
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c_group := lookup(group)
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C.Ganglia_metadata_add(gmetric, lookup("GROUP"), c_group)
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}
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// Now we send the metric
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// gmetric does provide some more options like description and other options
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// but they are not provided by the collectors
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rval = C.Ganglia_metric_send(gmetric, s.send_channels)
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if rval != 0 {
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err = fmt.Errorf("there was an error sending metric %s to %d of the send channels ", point.Name(), rval)
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// fall throuph to use Ganglia_metric_destroy from common cleanup
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}
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// Cleanup Ganglia metric
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C.Ganglia_metric_destroy(gmetric)
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// Free the value C string, the only one not stored in the cache
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C.free(unsafe.Pointer(c_value))
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return err
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}
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func (s *LibgangliaSink) Flush() error {
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return nil
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}
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func (s *LibgangliaSink) Close() {
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// Destroy Ganglia configration struct
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// (not done by gmetric, I thought I am more clever but no...)
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//C.Ganglia_gmond_config_destroy(s.gmond_config)
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// Destroy Ganglia pool
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C.Ganglia_pool_destroy(s.global_context)
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// Cleanup C string cache
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for _, cstr := range s.cstrCache {
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C.free(unsafe.Pointer(cstr))
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}
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}
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