Reduced set: Safe-deployment enhancements (#223)

* Reduced set - safe-deployment enhancements

* Informational message requested added.

* Increased test coverage

* Test coverage and retry exhaustion throw

* Minor comments

src/core/src/bootstrap/Constants.py

@@ -270,6 +270,7 @@ class PatchOperationTopLevelErrorCode(EnumBackport):
         ERROR = 1
 
     class PatchOperationErrorCodes(EnumBackport):
+        INFORMATIONAL = "INFORMATIONAL"
         DEFAULT_ERROR = "ERROR"  # default error code
         OPERATION_FAILED = "OPERATION_FAILED"
         PACKAGE_MANAGER_FAILURE = "PACKAGE_MANAGER_FAILURE"
@@ -310,6 +311,7 @@ class TelemetryTaskName(EnumBackport):
     TELEMETRY_NOT_COMPATIBLE_ERROR_MSG = "Unsupported older Azure Linux Agent version. To resolve: http://aka.ms/UpdateLinuxAgent"
     TELEMETRY_COMPATIBLE_MSG = "Minimum Azure Linux Agent version prerequisite met"
     PYTHON_NOT_COMPATIBLE_ERROR_MSG = "Unsupported older Python version. Minimum Python version required is 2.7. [DetectedPythonVersion={0}]"
+    INFO_STRICT_SDP_SUCCESS = "Success: Safely patched your VM in a AzGPS-coordinated global rollout. https://aka.ms/AzGPS/StrictSDP [Target={0}]"
     UTC_DATETIME_FORMAT = "%Y-%m-%dT%H:%M:%SZ"
 
     # EnvLayer Constants

src/core/src/core_logic/ExecutionConfig.py

@@ -59,6 +59,7 @@ def __init__(self, env_layer, composite_logger, execution_parameters):
         self.excluded_package_name_mask_list = self.__get_execution_configuration_value_safely(self.config_settings, Constants.ConfigSettings.PATCHES_TO_EXCLUDE, [])
         self.maintenance_run_id = self.__get_execution_configuration_value_safely(self.config_settings, Constants.ConfigSettings.MAINTENANCE_RUN_ID)
         self.health_store_id = self.__get_execution_configuration_value_safely(self.config_settings, Constants.ConfigSettings.HEALTH_STORE_ID)
+        self.max_patch_publish_date = self.__get_max_patch_publish_date(self.health_store_id)
         if self.operation == Constants.INSTALLATION:
             self.reboot_setting = self.config_settings[Constants.ConfigSettings.REBOOT_SETTING]     # expected to throw if not present
         else:
@@ -99,6 +100,18 @@ def __transform_execution_config_for_auto_assessment(self):
         self.patch_mode = None
         self.composite_logger.log_debug("Setting execution configuration values for auto assessment. [GeneratedActivityId={0}][StartTime={1}]".format(self.activity_id, str(self.start_time)))
 
+    def __get_max_patch_publish_date(self, health_store_id):
+        # type: (str) -> object
+        """ Obtains implicit date ceiling for published date - converts pub_off_sku_2024.04.01 to 20240401T000000Z """
+        max_patch_publish_date = str()
+        if health_store_id is not None and health_store_id != "":
+            split = health_store_id.split("_")
+            if len(split) == 4 and len(split[3]) == 10:
+                max_patch_publish_date = "{0}T000000Z".format(split[3].replace(".", ""))
+
+        self.composite_logger.log_debug("[EC] Getting max patch publish date. [MaxPatchPublishDate={0}][HealthStoreId={1}]".format(str(max_patch_publish_date), str(health_store_id)))
+        return max_patch_publish_date
+
     @staticmethod
     def __get_value_from_argv(argv, key, default_value=Constants.DEFAULT_UNSPECIFIED_VALUE):
         """ Discovers the value associated with a specific parameter in input arguments. """

src/core/src/core_logic/PatchInstaller.py

@@ -81,8 +81,20 @@ def start_installation(self, simulate=False):
                 self.composite_logger.log_debug("Attempting to reboot the machine prior to patch installation as there is a reboot pending...")
                 reboot_manager.start_reboot_if_required_and_time_available(maintenance_window.get_remaining_time_in_minutes(None, False))
 
-        # Install Updates
-        installed_update_count, update_run_successful, maintenance_window_exceeded = self.install_updates(maintenance_window, package_manager, simulate)
+        if self.execution_config.max_patch_publish_date != str():
+            self.package_manager.set_max_patch_publish_date(self.execution_config.max_patch_publish_date)
+
+        if self.package_manager.max_patch_publish_date != str():
+            """ Strict SDP with the package manager that supports it """
+            installed_update_count, update_run_successful, maintenance_window_exceeded = self.install_updates_azgps_coordinated(maintenance_window, package_manager, simulate)
+            package_manager.set_package_manager_setting(Constants.PACKAGE_MGR_SETTING_REPEAT_PATCH_OPERATION, bool(not update_run_successful))
+            if update_run_successful:
+                self.composite_logger.log_debug(Constants.INFO_STRICT_SDP_SUCCESS.format(self.execution_config.max_patch_publish_date))
+                self.status_handler.add_error_to_status(Constants.INFO_STRICT_SDP_SUCCESS.format(self.execution_config.max_patch_publish_date), error_code=Constants.PatchOperationErrorCodes.INFORMATIONAL)
+        else:
+            """ Regular patch installation flow - non-AzGPS-coordinated and (AzGPS-coordinated without strict SDP)"""
+            installed_update_count, update_run_successful, maintenance_window_exceeded = self.install_updates(maintenance_window, package_manager, simulate)
+
         retry_count = 1
         # Repeat patch installation if flagged as required and time is available
         if not maintenance_window_exceeded and package_manager.get_package_manager_setting(Constants.PACKAGE_MGR_SETTING_REPEAT_PATCH_OPERATION, False):
@@ -148,6 +160,66 @@ def raise_if_min_python_version_not_met(self):
             self.status_handler.set_installation_substatus_json(status=Constants.STATUS_ERROR)
             raise Exception(error_msg)
 
+    def install_updates_azgps_coordinated(self, maintenance_window, package_manager, simulate=False):
+        """ Special-casing installation as it meets the following criteria:
+            - Maintenance window is always guaranteed to be nearly 4 hours (235 minutes). Customer-facing maintenance windows are much larger (system limitation).
+            - Barring reboot, the core Azure customer-base moving to coordinated, unattended upgrades is currently on a 24x7 MW.
+            - Built in service-level retries and management of outcomes. Reboot will only happen within the core maintenance window (and won't be delayed).
+            - Corner-case transient failures are immaterial to the overall functioning of AzGPS coordinated upgrades (eventual consistency).
+            - Only security updates (no other configuration) - simplistic execution flow; no advanced evaluation is desired or necessary.
+        """
+        installed_update_count = 0  # includes dependencies
+        patch_installation_successful = True
+        maintenance_window_exceeded = False
+        remaining_time = maintenance_window.get_remaining_time_in_minutes()
+
+        try:
+            all_packages, all_package_versions = package_manager.get_all_updates(True)
+            packages, package_versions = package_manager.get_security_updates()
+            self.last_still_needed_packages = list(all_packages)
+            self.last_still_needed_package_versions = list(all_package_versions)
+
+            not_included_packages, not_included_package_versions = self.get_not_included_updates(package_manager, packages)
+            packages, package_versions, self.skipped_esm_packages, self.skipped_esm_package_versions, self.esm_packages_found_without_attach = package_manager.separate_out_esm_packages(packages, package_versions)
+
+            self.status_handler.set_package_install_status(not_included_packages, not_included_package_versions, Constants.NOT_SELECTED)
+            self.status_handler.set_package_install_status(packages, package_versions, Constants.PENDING)
+            self.status_handler.set_package_install_status(self.skipped_esm_packages, self.skipped_esm_package_versions, Constants.FAILED)
+
+            self.status_handler.set_package_install_status_classification(packages, package_versions, classification="Security")
+            package_manager.set_security_esm_package_status(Constants.INSTALLATION, packages)
+
+            installed_update_count = 0  # includes dependencies
+            patch_installation_successful = True
+            maintenance_window_exceeded = False
+
+            install_result = Constants.FAILED
+            for i in range(0, Constants.MAX_INSTALLATION_RETRY_COUNT):
+                code, out = package_manager.install_security_updates_azgps_coordinated()
+                installed_update_count += self.perform_status_reconciliation_conditionally(package_manager)
+
+                remaining_time = maintenance_window.get_remaining_time_in_minutes()
+                if remaining_time < 120:
+                    raise Exception("Not enough safety-buffer to continue strict safe deployment.")
+
+                if code != 0:   # will need to be modified for other package managers
+                    if i < Constants.MAX_INSTALLATION_RETRY_COUNT - 1:
+                        time.sleep(i * 5)
+                        self.composite_logger.log_warning("[PI][AzGPS-Coordinated] Non-zero return. Retrying. [RetryCount={0}][TimeRemainingInMins={1}][Code={2}][Output={3}]".format(str(i), str(remaining_time), str(code), out))
+                    else:
+                        raise Exception("AzGPS Strict SDP retries exhausted. [RetryCount={0}]".format(str(i)))
+                else:
+                    patch_installation_successful = True
+                    break
+        except Exception as error:
+            error_msg = "AzGPS strict safe deployment to target date hit a failure. Defaulting to regular upgrades. [MaxPatchPublishDate={0}]".format(self.execution_config.max_patch_publish_date)
+            self.composite_logger.log_error(error_msg + "[Error={0}]".format(repr(error)))
+            self.status_handler.add_error_to_status(error_msg)
+            self.package_manager.set_max_patch_publish_date()   # fall-back
+            patch_installation_successful = False
+
+        return installed_update_count, patch_installation_successful, maintenance_window_exceeded
+
     def install_updates(self, maintenance_window, package_manager, simulate=False):
         """wrapper function of installing updates"""
         self.composite_logger.log("\n\nGetting available updates...")
@@ -576,20 +648,10 @@ def mark_installation_completed(self):
             self.status_handler.set_installation_substatus_json(status=Constants.STATUS_WARNING)
 
         # Update patch metadata in status for auto patching request, to be reported to healthStore
-        # When available, HealthStoreId always takes precedence over the 'overriden' Maintenance Run Id that is being re-purposed for other reasons
-        # In the future, maintenance run id will be completely deprecated for health store reporting.
-        patch_version_raw = self.execution_config.health_store_id if self.execution_config.health_store_id is not None else self.execution_config.maintenance_run_id
-        self.composite_logger.log_debug("Patch version raw value set. [Raw={0}][HealthStoreId={1}][MaintenanceRunId={2}]".format(str(patch_version_raw), str(self.execution_config.health_store_id), str(self.execution_config.maintenance_run_id)))
-
-        if patch_version_raw is not None:
-            try:
-                patch_version = datetime.datetime.strptime(patch_version_raw.split(" ")[0], "%m/%d/%Y").strftime('%Y.%m.%d')
-            except ValueError as e:
-                patch_version = str(patch_version_raw) # CRP is supposed to guarantee that healthStoreId is always in the correct format; (Legacy) Maintenance Run Id may not be; what happens prior to this is just defensive coding
-                self.composite_logger.log_debug("Patch version _may_ be in an incorrect format. [CommonFormat=DateTimeUTC][Actual={0}][Error={1}]".format(str(self.execution_config.maintenance_run_id), repr(e)))
-
+        self.composite_logger.log_debug("[PI] Reviewing final healthstore record write. [HealthStoreId={0}][MaintenanceRunId={1}]".format(str(self.execution_config.health_store_id), str(self.execution_config.maintenance_run_id)))
+        if self.execution_config.health_store_id is not None:
             self.status_handler.set_patch_metadata_for_healthstore_substatus_json(
-                patch_version=patch_version if patch_version is not None and patch_version != "" else Constants.PATCH_VERSION_UNKNOWN,
+                patch_version=self.execution_config.health_store_id,
                 report_to_healthstore=True,
                 wait_after_update=False)
 
@@ -602,7 +664,7 @@ def perform_status_reconciliation_conditionally(self, package_manager, condition
         if not condition:
             return 0
 
-        self.composite_logger.log_debug("\nStarting status reconciliation...")
+        self.composite_logger.log_verbose("\nStarting status reconciliation...")
         start_time = time.time()
         still_needed_packages, still_needed_package_versions = package_manager.get_all_updates(False)  # do not use cache
         successful_packages = []
@@ -615,7 +677,7 @@ def perform_status_reconciliation_conditionally(self, package_manager, condition
         self.status_handler.set_package_install_status(successful_packages, successful_package_versions, Constants.INSTALLED)
         self.last_still_needed_packages = still_needed_packages
         self.last_still_needed_package_versions = still_needed_package_versions
-        self.composite_logger.log_debug("Completed status reconciliation. Time taken: " + str(time.time() - start_time) + " seconds.")
+        self.composite_logger.log_verbose("Completed status reconciliation. Time taken: " + str(time.time() - start_time) + " seconds.")
         return len(successful_packages)
     # endregion