Metrics

[nilekhc]

Reason for Change:

Adds otel instrumentation for custom metrics. Following custom metrics are added

kms_request

Issue Fixed:

fixes #96
Notes for Reviewers:

[nilekhc]

Sample metrics output:

# HELP decrypt_duration_sec Distribution of how long it took to decrypt request
# TYPE decrypt_duration_sec histogram
decrypt_duration_sec_bucket{os_type="darwin",service_name="unknown_service:__debug_bin",telemetry_sdk_language="go",telemetry_sdk_name="opentelemetry",telemetry_sdk_version="0.20.0",le="0.1"} 97
decrypt_duration_sec_bucket{os_type="darwin",service_name="unknown_service:__debug_bin",telemetry_sdk_language="go",telemetry_sdk_name="opentelemetry",telemetry_sdk_version="0.20.0",le="0.2"} 100
decrypt_duration_sec_bucket{os_type="darwin",service_name="unknown_service:__debug_bin",telemetry_sdk_language="go",telemetry_sdk_name="opentelemetry",telemetry_sdk_version="0.20.0",le="0.3"} 100
decrypt_duration_sec_bucket{os_type="darwin",service_name="unknown_service:__debug_bin",telemetry_sdk_language="go",telemetry_sdk_name="opentelemetry",telemetry_sdk_version="0.20.0",le="0.4"} 100
decrypt_duration_sec_bucket{os_type="darwin",service_name="unknown_service:__debug_bin",telemetry_sdk_language="go",telemetry_sdk_name="opentelemetry",telemetry_sdk_version="0.20.0",le="0.5"} 100
decrypt_duration_sec_bucket{os_type="darwin",service_name="unknown_service:__debug_bin",telemetry_sdk_language="go",telemetry_sdk_name="opentelemetry",telemetry_sdk_version="0.20.0",le="1"} 100
decrypt_duration_sec_bucket{os_type="darwin",service_name="unknown_service:__debug_bin",telemetry_sdk_language="go",telemetry_sdk_name="opentelemetry",telemetry_sdk_version="0.20.0",le="1.5"} 100
decrypt_duration_sec_bucket{os_type="darwin",service_name="unknown_service:__debug_bin",telemetry_sdk_language="go",telemetry_sdk_name="opentelemetry",telemetry_sdk_version="0.20.0",le="2"} 100
decrypt_duration_sec_bucket{os_type="darwin",service_name="unknown_service:__debug_bin",telemetry_sdk_language="go",telemetry_sdk_name="opentelemetry",telemetry_sdk_version="0.20.0",le="2.5"} 100
decrypt_duration_sec_bucket{os_type="darwin",service_name="unknown_service:__debug_bin",telemetry_sdk_language="go",telemetry_sdk_name="opentelemetry",telemetry_sdk_version="0.20.0",le="3"} 100
decrypt_duration_sec_bucket{os_type="darwin",service_name="unknown_service:__debug_bin",telemetry_sdk_language="go",telemetry_sdk_name="opentelemetry",telemetry_sdk_version="0.20.0",le="5"} 100
decrypt_duration_sec_bucket{os_type="darwin",service_name="unknown_service:__debug_bin",telemetry_sdk_language="go",telemetry_sdk_name="opentelemetry",telemetry_sdk_version="0.20.0",le="10"} 100
decrypt_duration_sec_bucket{os_type="darwin",service_name="unknown_service:__debug_bin",telemetry_sdk_language="go",telemetry_sdk_name="opentelemetry",telemetry_sdk_version="0.20.0",le="15"} 100
decrypt_duration_sec_bucket{os_type="darwin",service_name="unknown_service:__debug_bin",telemetry_sdk_language="go",telemetry_sdk_name="opentelemetry",telemetry_sdk_version="0.20.0",le="30"} 100
decrypt_duration_sec_bucket{os_type="darwin",service_name="unknown_service:__debug_bin",telemetry_sdk_language="go",telemetry_sdk_name="opentelemetry",telemetry_sdk_version="0.20.0",le="+Inf"} 100
decrypt_duration_sec_sum{os_type="darwin",service_name="unknown_service:__debug_bin",telemetry_sdk_language="go",telemetry_sdk_name="opentelemetry",telemetry_sdk_version="0.20.0"} 4.4068910269999995
decrypt_duration_sec_count{os_type="darwin",service_name="unknown_service:__debug_bin",telemetry_sdk_language="go",telemetry_sdk_name="opentelemetry",telemetry_sdk_version="0.20.0"} 100
# HELP encrypt_duration_sec Distribution of how long it took to encrypt request
# TYPE encrypt_duration_sec histogram
encrypt_duration_sec_bucket{os_type="darwin",service_name="unknown_service:__debug_bin",telemetry_sdk_language="go",telemetry_sdk_name="opentelemetry",telemetry_sdk_version="0.20.0",le="0.1"} 93
encrypt_duration_sec_bucket{os_type="darwin",service_name="unknown_service:__debug_bin",telemetry_sdk_language="go",telemetry_sdk_name="opentelemetry",telemetry_sdk_version="0.20.0",le="0.2"} 99
encrypt_duration_sec_bucket{os_type="darwin",service_name="unknown_service:__debug_bin",telemetry_sdk_language="go",telemetry_sdk_name="opentelemetry",telemetry_sdk_version="0.20.0",le="0.3"} 99
encrypt_duration_sec_bucket{os_type="darwin",service_name="unknown_service:__debug_bin",telemetry_sdk_language="go",telemetry_sdk_name="opentelemetry",telemetry_sdk_version="0.20.0",le="0.4"} 99
encrypt_duration_sec_bucket{os_type="darwin",service_name="unknown_service:__debug_bin",telemetry_sdk_language="go",telemetry_sdk_name="opentelemetry",telemetry_sdk_version="0.20.0",le="0.5"} 99
encrypt_duration_sec_bucket{os_type="darwin",service_name="unknown_service:__debug_bin",telemetry_sdk_language="go",telemetry_sdk_name="opentelemetry",telemetry_sdk_version="0.20.0",le="1"} 100
encrypt_duration_sec_bucket{os_type="darwin",service_name="unknown_service:__debug_bin",telemetry_sdk_language="go",telemetry_sdk_name="opentelemetry",telemetry_sdk_version="0.20.0",le="1.5"} 100
encrypt_duration_sec_bucket{os_type="darwin",service_name="unknown_service:__debug_bin",telemetry_sdk_language="go",telemetry_sdk_name="opentelemetry",telemetry_sdk_version="0.20.0",le="2"} 100
encrypt_duration_sec_bucket{os_type="darwin",service_name="unknown_service:__debug_bin",telemetry_sdk_language="go",telemetry_sdk_name="opentelemetry",telemetry_sdk_version="0.20.0",le="2.5"} 100
encrypt_duration_sec_bucket{os_type="darwin",service_name="unknown_service:__debug_bin",telemetry_sdk_language="go",telemetry_sdk_name="opentelemetry",telemetry_sdk_version="0.20.0",le="3"} 100
encrypt_duration_sec_bucket{os_type="darwin",service_name="unknown_service:__debug_bin",telemetry_sdk_language="go",telemetry_sdk_name="opentelemetry",telemetry_sdk_version="0.20.0",le="5"} 100
encrypt_duration_sec_bucket{os_type="darwin",service_name="unknown_service:__debug_bin",telemetry_sdk_language="go",telemetry_sdk_name="opentelemetry",telemetry_sdk_version="0.20.0",le="10"} 100
encrypt_duration_sec_bucket{os_type="darwin",service_name="unknown_service:__debug_bin",telemetry_sdk_language="go",telemetry_sdk_name="opentelemetry",telemetry_sdk_version="0.20.0",le="15"} 100
encrypt_duration_sec_bucket{os_type="darwin",service_name="unknown_service:__debug_bin",telemetry_sdk_language="go",telemetry_sdk_name="opentelemetry",telemetry_sdk_version="0.20.0",le="30"} 100
encrypt_duration_sec_bucket{os_type="darwin",service_name="unknown_service:__debug_bin",telemetry_sdk_language="go",telemetry_sdk_name="opentelemetry",telemetry_sdk_version="0.20.0",le="+Inf"} 100
encrypt_duration_sec_sum{os_type="darwin",service_name="unknown_service:__debug_bin",telemetry_sdk_language="go",telemetry_sdk_name="opentelemetry",telemetry_sdk_version="0.20.0"} 5.661030241000001
encrypt_duration_sec_count{os_type="darwin",service_name="unknown_service:__debug_bin",telemetry_sdk_language="go",telemetry_sdk_name="opentelemetry",telemetry_sdk_version="0.20.0"} 100
# HELP total_decrypt Total number of Decrypt requests
# TYPE total_decrypt counter
total_decrypt{os_type="darwin",service_name="unknown_service:__debug_bin",telemetry_sdk_language="go",telemetry_sdk_name="opentelemetry",telemetry_sdk_version="0.20.0"} 100
# HELP total_encrypt Total number of Encrypt requests
# TYPE total_encrypt counter
total_encrypt{os_type="darwin",service_name="unknown_service:__debug_bin",telemetry_sdk_language="go",telemetry_sdk_name="opentelemetry",telemetry_sdk_version="0.20.0"} 100

[aramase]

Just few small nits, but otherwise lgtm!