Created a separate package for tracing-related stuff

Added mirroring of spans into Sentry
Tracer is a facade that redirects actions to tracing backends

cmapi/tracing/sentry.py

@@ -0,0 +1,65 @@
+import logging
+
+import sentry_sdk
+from sentry_sdk.integrations.logging import LoggingIntegration
+
+from cmapi_server import helpers
+from cmapi_server.constants import CMAPI_CONF_PATH
+from tracing.sentry_backend import SentryBackend
+from tracing.tracer import get_tracer
+
+SENTRY_ACTIVE = False
+
+logger = logging.getLogger(__name__)
+
+def maybe_init_sentry() -> bool:
+    """Initialize Sentry from CMAPI configuration.
+
+    Reads config and initializes Sentry only if dsn parameter is present
+      in corresponding section of cmapi config.
+    The initialization enables LoggingIntegration: it captures error-level logs as Sentry events
+      and uses lower-level logs as breadcrumbs.
+
+    Returns: True if Sentry is initialized, False otherwise.
+    """
+    global SENTRY_ACTIVE
+    try:
+        cfg_parser = helpers.get_config_parser(CMAPI_CONF_PATH)
+        dsn = helpers.dequote(
+            cfg_parser.get('Sentry', 'dsn', fallback='').strip()
+        )
+        if not dsn:
+            return False
+
+        environment = helpers.dequote(
+            cfg_parser.get('Sentry', 'environment', fallback='development').strip()
+        )
+    except Exception:
+        logger.exception('Failed to initialize Sentry.')
+        return False
+
+    try:
+        sentry_logging = LoggingIntegration(
+            level=logging.INFO,
+            event_level=logging.ERROR,
+        )
+
+        sentry_sdk.init(
+            dsn=dsn,
+            environment=environment,
+            sample_rate=1.0,
+            traces_sample_rate=1.0,
+            integrations=[sentry_logging],
+            debug=True,
+        )
+        SENTRY_ACTIVE = True
+        # Register backend to mirror our internal spans into Sentry
+        get_tracer().register_backend(SentryBackend())
+        logger.info('Sentry initialized for CMAPI via config.')
+    except Exception:
+        logger.exception('Failed to initialize Sentry.')
+        return False
+
+    logger.info('Sentry successfully initialized.')
+    return True
+