Reference Samples: dubbo-go-samples/metrics
When the metrics: field is not specified, the pull mode prometheus data reporting is enabled by default, the default port is 9090, and the monitoring path defaults to /metrics. You can customize it by referring to the server configuration example below.
dubbo: application: version: 3.0.0-rc3 # version number metrics: enable: true # default is true path: /custom-metrics-path # default is /metrics port: 9091 # default is 9090 namespace: dubbo # default is dubbo as the prefix for data reporting metrics registries: myzk: protocol: zookeeper address: localhost:2181 protocols: triple: name: tri port: 20000 provider: services: GreeterProvider: group: dubbo-go # belongs to the group, need to be consistent with the client interface: com.apache.dubbo.HelloService # interface name
After starting the above server locally, you can collect default data metrics at localhost:9091/custom-metrics-path, including gc, goroutine number, memory usage, etc.
# HELP go_gc_duration_seconds A summary of the pause duration of garbage collection cycles. # TYPE go_gc_duration_seconds summary go_gc_duration_seconds{quantile="0"} 3.0916e-05 go_gc_duration_seconds{quantile="0.25"} 3.0916e-05 go_gc_duration_seconds{quantile="0.5"} 3.1167e-05 go_gc_duration_seconds{quantile="0.75"} 0.000164084 go_gc_duration_seconds{quantile="1"} 0.000164084 go_gc_duration_seconds_sum 0.000226167 go_gc_duration_seconds_count 3 # HELP go_goroutines Number of goroutines that currently exist. # TYPE go_goroutines gauge go_goroutines 25 # HELP go_info Information about the Go environment. # TYPE go_info gauge go_info{version="go1.17.2"} 1 # HELP go_memstats_alloc_bytes Number of bytes allocated and still in use. # TYPE go_memstats_alloc_bytes gauge go_memstats_alloc_bytes 6.195808e+06 # HELP go_memstats_alloc_bytes_total Total number of bytes allocated, even if freed. # TYPE go_memstats_alloc_bytes_total counter go_memstats_alloc_bytes_total 9.482768e+06 # HELP go_memstats_buck_hash_sys_bytes Number of bytes used by the profiling bucket hash table. # TYPE go_memstats_buck_hash_sys_bytes gauge go_memstats_buck_hash_sys_bytes 1.449179e+06 # HELP go_memstats_frees_total Total number of frees. # TYPE go_memstats_frees_total counter go_memstats_frees_total 29419 # HELP go_memstats_gc_cpu_fraction The fraction of this program's available CPU time used by the GC since the program started. # TYPE go_memstats_gc_cpu_fraction gauge go_memstats_gc_cpu_fraction 0.022937924367975027 # HELP go_memstats_gc_sys_bytes Number of bytes used for garbage collection system metadata. # TYPE go_memstats_gc_sys_bytes gauge go_memstats_gc_sys_bytes 5.235864e+06 # HELP go_memstats_heap_alloc_bytes Number of heap bytes allocated and still in use. # TYPE go_memstats_heap_alloc_bytes gauge go_memstats_heap_alloc_bytes 6.195808e+06 # HELP go_memstats_heap_idle_bytes Number of heap bytes waiting to be used. # TYPE go_memstats_heap_idle_bytes gauge go_memstats_heap_idle_bytes 3.792896e+06 # HELP go_memstats_heap_inuse_bytes Number of heap bytes that are in use. # TYPE go_memstats_heap_inuse_bytes gauge go_memstats_heap_inuse_bytes 8.036352e+06 # HELP go_memstats_heap_objects Number of allocated objects. # TYPE go_memstats_heap_objects gauge go_memstats_heap_objects 16489 # HELP go_memstats_heap_released_bytes Number of heap bytes released to OS. # TYPE go_memstats_heap_released_bytes gauge go_memstats_heap_released_bytes 3.416064e+06 # HELP go_memstats_heap_sys_bytes Number of heap bytes obtained from system. # TYPE go_memstats_heap_sys_bytes gauge go_memstats_heap_sys_bytes 1.1829248e+07 # HELP go_memstats_last_gc_time_seconds Number of seconds since 1970 of last garbage collection. # TYPE go_memstats_last_gc_time_seconds gauge go_memstats_last_gc_time_seconds 1.635778234064745e+09 # HELP go_memstats_lookups_total Total number of pointer lookups. # TYPE go_memstats_lookups_total counter go_memstats_lookups_total 0 # HELP go_memstats_mallocs_total Total number of mallocs. # TYPE go_memstats_mallocs_total counter go_memstats_mallocs_total 45908 # HELP go_memstats_mcache_inuse_bytes Number of bytes in use by mcache structures. # TYPE go_memstats_mcache_inuse_bytes gauge go_memstats_mcache_inuse_bytes 9600 # HELP go_memstats_mcache_sys_bytes Number of bytes used for mcache structures obtained from system. # TYPE go_memstats_mcache_sys_bytes gauge go_memstats_mcache_sys_bytes 16384 # HELP go_memstats_mspan_inuse_bytes Number of bytes in use by mspan structures. # TYPE go_memstats_mspan_inuse_bytes gauge go_memstats_mspan_inuse_bytes 116144 # HELP go_memstats_mspan_sys_bytes Number of bytes used for mspan structures obtained from system. # TYPE go_memstats_mspan_sys_bytes gauge go_memstats_mspan_sys_bytes 131072 # HELP go_memstats_next_gc_bytes Number of heap bytes when next garbage collection will take place. # TYPE go_memstats_next_gc_bytes gauge go_memstats_next_gc_bytes 7.935184e+06 # HELP go_memstats_other_sys_bytes Number of bytes used for other system allocations. # TYPE go_memstats_other_sys_bytes gauge go_memstats_other_sys_bytes 1.426069e+06 # HELP go_memstats_stack_inuse_bytes Number of bytes in use by the stack allocator. # TYPE go_memstats_stack_inuse_bytes gauge go_memstats_stack_inuse_bytes 753664 # HELP go_memstats_stack_sys_bytes Number of bytes obtained from system for stack allocator. # TYPE go_memstats_stack_sys_bytes gauge go_memstats_stack_sys_bytes 753664 # HELP go_memstats_sys_bytes Number of bytes obtained from system. # TYPE go_memstats_sys_bytes gauge go_memstats_sys_bytes 2.084148e+07 # HELP go_threads Number of OS threads created. # TYPE go_threads gauge go_threads 12
Start the client in the example. After several calls, you will find that the corresponding data indicators have been added, prefixed with the default namespace dubbo.
# HELP dubbo_provider_service_rt # TYPE dubbo_provider_service_rt gauge dubbo_provider_service_rt{group="dubbo-go", method="SayHello", service="com.apache.dubbo.HelloService", timeout="", version="3.0.0-rc3"} 127542
You can see the request rt time corresponding to the interface name and method name. This part of the calling indicators is to be improved later.
The API can be called in the business code for manual data reporting. Supports Counter, Summary, Gauge types, and supports multiple labels. It can be collected after reporting.
import "dubbo.apache.org/dubbo-go/v3/metrics/prometheus" for { // metrics refresh per second time. Sleep(time. Second) prometheus.IncSummary("test_summary", rand.Float64()) prometheus.IncSummaryWithLabel("test_summary_with_label", rand.Float64(), map[string]string{ "summarylabel1": "value1", // label and value for this summary "summarylabel2": "value2", }) prometheus. IncCounter("test_counter") prometheus.IncCounterWithLabel("test_counter_with_label", map[string]string{ "counterlabel1": "value1", // label and value for this counter "counterlabel2": "value2", }) prometheus. SetGauge("test_gauge", rand. Float64()) prometheus.SetGaugeWithLabel("test_gauge_with_label", rand.Float64(), map[string]string{ "gaugelabel1": "value1", "gaugelabel2": "value2", }) }
After running for a period of time, the following user-defined indicators can be collected
# HELP dubbo_test_counter # TYPE dubbo_test_counter counter dubbo_test_counter 463 # HELP dubbo_test_counter_with_label # TYPE dubbo_test_counter_with_label counter dubbo_test_counter_with_label{counterlabel1="value1", counterlabel2="value2"} 463 # HELP dubbo_test_gauge # TYPE dubbo_test_gauge gauge dubbo_test_gauge 0.7402836247772934 # HELP dubbo_test_gauge_with_label # TYPE dubbo_test_gauge_with_label gauge dubbo_test_gauge_with_label{gaugelabel1="value1", gaugelabel2="value2"} 0.8360973807546456 # HELP dubbo_test_summary # TYPE dubbo_test_summary summary dubbo_test_summary_sum 228.1800106582441 dubbo_test_summary_count 463 # HELP dubbo_test_summary_with_label # TYPE dubbo_test_summary_with_label summary dubbo_test_summary_with_label{summarylabel1="value1",summarylabel2="value2",quantile="0.5"} 0.5174757569778469 dubbo_test_summary_with_label{summarylabel1="value1",summarylabel2="value2",quantile="0.75"} 0.734268575017709 dubbo_test_summary_with_label{summarylabel1="value1",summarylabel2="value2",quantile="0.9"} 0.9059918694279894 dubbo_test_summary_with_label{summarylabel1="value1",summarylabel2="value2",quantile="0.98"} 0.9761803018478838 dubbo_test_summary_with_label{summarylabel1="value1",summarylabel2="value2",quantile="0.99"} 0.9820270046489341 dubbo_test_summary_with_label{summarylabel1="value1",summarylabel2="value2",quantile="0.999"} 0.9986025122460248 dubbo_test_summary_with_label_sum{summarylabel1="value1",summarylabel2="value2"} 233.609026131067 dubbo_test_summary_with_label_count{summarylabel1="value1",summarylabel2="value2"} 463