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How to use docker_image_for_lambda method in localstack

Best Python code snippet using localstack_python
lambda_executors.py
Source:lambda_executors.py
...706            func_arn = lambda_function.arn()707            container_name = self.get_container_name(func_arn)708            status = self.get_docker_container_status(func_arn)709            LOG.debug('Priming Docker container (status "%s"): %s' % (status, container_name))710            docker_image = Util.docker_image_for_lambda(lambda_function)711            # Container is not running or doesn't exist.712            if status < 1:713                # Make sure the container does not exist in any form/state.714                self.destroy_docker_container(func_arn)715                # get container startup command and run it716                LOG.debug("Creating container: %s" % container_name)717                self.create_container(lambda_function, env_vars, lambda_cwd, docker_flags)718                if config.LAMBDA_REMOTE_DOCKER:719                    LOG.debug(720                        'Copying files to container "%s" from "%s".' % (container_name, lambda_cwd)721                    )722                    DOCKER_CLIENT.copy_into_container(723                        container_name, "%s/." % lambda_cwd, DOCKER_TASK_FOLDER724                    )725                LOG.debug("Starting docker-reuse Lambda container: %s", container_name)726                DOCKER_CLIENT.start_container(container_name)727                # give the container some time to start up728                time.sleep(1)729            container_network = self.get_docker_container_network(func_arn)730            entry_point = DOCKER_CLIENT.get_image_entrypoint(docker_image)731            LOG.debug(732                'Using entrypoint "%s" for container "%s" on network "%s".'733                % (entry_point, container_name, container_network)734            )735            return ContainerInfo(container_name, entry_point)736    def create_container(737        self,738        lambda_function: LambdaFunction,739        env_vars: Dict,740        lambda_cwd: str,741        docker_flags: str = None,742    ):743        docker_image = Util.docker_image_for_lambda(lambda_function)744        container_name = self.get_container_name(lambda_function.arn())745        # make sure we set LOCALSTACK_HOSTNAME746        Util.inject_endpoints_into_env(env_vars)747        # make sure AWS_LAMBDA_EVENT_BODY is not set (otherwise causes issues with "docker exec ..." above)748        env_vars.pop("AWS_LAMBDA_EVENT_BODY", None)749        network = config.LAMBDA_DOCKER_NETWORK750        additional_flags = docker_flags751        dns = config.LAMBDA_DOCKER_DNS752        mount_volumes = not config.LAMBDA_REMOTE_DOCKER753        lambda_cwd_on_host = Util.get_host_path_for_path_in_docker(lambda_cwd)754        if ":" in lambda_cwd and "\\" in lambda_cwd:755            lambda_cwd_on_host = Util.format_windows_path(lambda_cwd_on_host)756        mount_volumes = [(lambda_cwd_on_host, DOCKER_TASK_FOLDER)] if mount_volumes else None757        if os.environ.get("HOSTNAME"):758            env_vars["HOSTNAME"] = os.environ.get("HOSTNAME")759        env_vars["EDGE_PORT"] = config.EDGE_PORT760        LOG.debug(761            "Creating docker-reuse Lambda container %s from image %s", container_name, docker_image762        )763        return DOCKER_CLIENT.create_container(764            image_name=docker_image,765            remove=True,766            interactive=True,767            name=container_name,768            entrypoint="/bin/bash",769            network=network,770            env_vars=env_vars,771            dns=dns,772            mount_volumes=mount_volumes,773            additional_flags=additional_flags,774        )775    def destroy_docker_container(self, func_arn):776        """777        Stops and/or removes a docker container for a specific lambda function ARN.778        :param func_arn: The ARN of the lambda function.779        :return: None780        """781        with self.docker_container_lock:782            status = self.get_docker_container_status(func_arn)783            # Get the container name and id.784            container_name = self.get_container_name(func_arn)785            if status == 1:786                LOG.debug("Stopping container: %s" % container_name)787                DOCKER_CLIENT.stop_container(container_name)788                status = self.get_docker_container_status(func_arn)789            if status == -1:790                LOG.debug("Removing container: %s" % container_name)791                rm_docker_container(container_name, safe=True)792            # clean up function invoke times, as some init logic depends on this793            self.function_invoke_times.pop(func_arn, None)794    def get_all_container_names(self):795        """796        Returns a list of container names for lambda containers.797        :return: A String[] localstack docker container names for each function.798        """799        with self.docker_container_lock:800            LOG.debug("Getting all lambda containers names.")801            list_result = DOCKER_CLIENT.list_containers(802                filter=f"name={self.get_container_prefix()}*"803            )804            container_names = list(map(lambda container: container["name"], list_result))805            return container_names806    def destroy_existing_docker_containers(self):807        """808        Stops and/or removes all lambda docker containers for localstack.809        :return: None810        """811        with self.docker_container_lock:812            container_names = self.get_all_container_names()813            LOG.debug("Removing %d containers." % len(container_names))814            for container_name in container_names:815                DOCKER_CLIENT.remove_container(container_name)816    def get_docker_container_status(self, func_arn):817        """818        Determine the status of a docker container.819        :param func_arn: The ARN of the lambda function.820        :return: 1 If the container is running,821        -1 if the container exists but is not running822        0 if the container does not exist.823        """824        with self.docker_container_lock:825            # Get the container name and id.826            container_name = self.get_container_name(func_arn)827            container_status = DOCKER_CLIENT.get_container_status(container_name)828            return container_status.value829    def get_docker_container_network(self, func_arn):830        """831        Determine the network of a docker container.832        :param func_arn: The ARN of the lambda function.833        :return: name of the container network834        """835        with self.docker_container_lock:836            status = self.get_docker_container_status(func_arn)837            # container does not exist838            if status == 0:839                return ""840            # Get the container name.841            container_name = self.get_container_name(func_arn)842            container_network = DOCKER_CLIENT.get_network(container_name)843            return container_network844    def idle_container_destroyer(self):845        """846        Iterates though all the lambda containers and destroys any container that has847        been inactive for longer than MAX_CONTAINER_IDLE_TIME_MS.848        :return: None849        """850        LOG.debug("Checking if there are idle containers ...")851        current_time = int(time.time() * 1000)852        for func_arn, last_run_time in dict(self.function_invoke_times).items():853            duration = current_time - last_run_time854            # not enough idle time has passed855            if duration < MAX_CONTAINER_IDLE_TIME_MS:856                continue857            # container has been idle, destroy it.858            self.destroy_docker_container(func_arn)859    def start_idle_container_destroyer_interval(self):860        """861        Starts a repeating timer that triggers start_idle_container_destroyer_interval every 60 seconds.862        Thus checking for idle containers and destroying them.863        :return: None864        """865        self.idle_container_destroyer()866        threading.Timer(60.0, self.start_idle_container_destroyer_interval).start()867    def get_container_prefix(self) -> str:868        """869        Returns the prefix of all docker-reuse lambda containers for this LocalStack instance870        :return: Lambda container name prefix871        """872        return f"{bootstrap.get_main_container_name()}_lambda_"873    def get_container_name(self, func_arn):874        """875        Given a function ARN, returns a valid docker container name.876        :param func_arn: The ARN of the lambda function.877        :return: A docker compatible name for the arn.878        """879        return self.get_container_prefix() + re.sub(r"[^a-zA-Z0-9_.-]", "_", func_arn)880class LambdaExecutorSeparateContainers(LambdaExecutorContainers):881    def __init__(self):882        super(LambdaExecutorSeparateContainers, self).__init__()883        self.max_port = LAMBDA_API_UNIQUE_PORTS884        self.port_offset = LAMBDA_API_PORT_OFFSET885    def prepare_event(self, environment: Dict, event_body: str) -> bytes:886        # Tell Lambci to use STDIN for the event887        environment["DOCKER_LAMBDA_USE_STDIN"] = "1"888        return event_body.encode()889    def execute_in_container(890        self,891        lambda_function: LambdaFunction,892        inv_context: InvocationContext,893        stdin=None,894        background=False,895    ) -> Tuple[bytes, bytes]:896        lambda_cwd = lambda_function.cwd897        env_vars = inv_context.environment898        entrypoint = None899        if inv_context.lambda_command:900            entrypoint = ""901        elif inv_context.handler:902            inv_context.lambda_command = inv_context.handler903        # add Docker Lambda env vars904        network = config.LAMBDA_DOCKER_NETWORK or None905        if network == "host":906            port = get_free_tcp_port()907            env_vars["DOCKER_LAMBDA_API_PORT"] = port908            env_vars["DOCKER_LAMBDA_RUNTIME_PORT"] = port909        additional_flags = inv_context.docker_flags or ""910        dns = config.LAMBDA_DOCKER_DNS911        docker_java_ports = PortMappings()912        if Util.debug_java_port:913            docker_java_ports.add(Util.debug_java_port)914        docker_image = Util.docker_image_for_lambda(lambda_function)915        if config.LAMBDA_REMOTE_DOCKER:916            container_id = DOCKER_CLIENT.create_container(917                image_name=docker_image,918                interactive=True,919                entrypoint=entrypoint,920                remove=True,921                network=network,922                env_vars=env_vars,923                dns=dns,924                additional_flags=additional_flags,925                ports=docker_java_ports,926                command=inv_context.lambda_command,927            )928            DOCKER_CLIENT.copy_into_container(container_id, f"{lambda_cwd}/.", DOCKER_TASK_FOLDER)929            return DOCKER_CLIENT.start_container(930                container_id, interactive=not background, attach=not background, stdin=stdin931            )932        else:933            mount_volumes = None934            if lambda_cwd:935                mount_volumes = [936                    (Util.get_host_path_for_path_in_docker(lambda_cwd), DOCKER_TASK_FOLDER)937                ]938            return DOCKER_CLIENT.run_container(939                image_name=docker_image,940                interactive=True,941                detach=background,942                entrypoint=entrypoint,943                remove=True,944                network=network,945                env_vars=env_vars,946                dns=dns,947                additional_flags=additional_flags,948                command=inv_context.lambda_command,949                mount_volumes=mount_volumes,950                stdin=stdin,951            )952class LambdaExecutorLocal(LambdaExecutor):953    def _execute_in_custom_runtime(954        self, cmd: Union[str, List[str]], lambda_function: LambdaFunction = None955    ) -> InvocationResult:956        """957        Generic run function for executing lambdas in custom runtimes.958        :param cmd: the command to execute959        :param lambda_function: function details960        :return: the InvocationResult961        """962        env_vars = lambda_function and lambda_function.envvars963        kwargs = {"stdin": True, "inherit_env": True, "asynchronous": True, "env_vars": env_vars}964        process = run(cmd, stderr=subprocess.PIPE, outfile=subprocess.PIPE, **kwargs)965        result, log_output = process.communicate()966        try:967            result = to_str(result).strip()968        except Exception:969            pass970        log_output = to_str(log_output).strip()971        return_code = process.returncode972        # Note: The user's code may have been logging to stderr, in which case the logs973        # will be part of the "result" variable here. Hence, make sure that we extract974        # only the *last* line of "result" and consider anything above that as log output.975        # TODO: not sure if this code is needed/used976        if isinstance(result, str) and "\n" in result:977            lines = result.split("\n")978            idx = last_index_of(979                lines, lambda line: line and not line.startswith(INTERNAL_LOG_PREFIX)980            )981            if idx >= 0:982                result = lines[idx]983                additional_logs = "\n".join(lines[:idx] + lines[idx + 1 :])984                log_output += "\n%s" % additional_logs985        log_formatted = log_output.strip().replace("\n", "\n> ")986        func_arn = lambda_function and lambda_function.arn()987        LOG.debug(988            "Lambda %s result / log output:\n%s\n> %s" % (func_arn, result.strip(), log_formatted)989        )990        # store log output - TODO get live logs from `process` above?991        # store_lambda_logs(lambda_function, log_output)992        if return_code != 0:993            raise InvocationException(994                "Lambda process returned error status code: %s. Result: %s. Output:\n%s"995                % (return_code, result, log_output),996                log_output,997                result,998            )999        invocation_result = InvocationResult(result, log_output=log_output)1000        return invocation_result1001    def _execute(1002        self, lambda_function: LambdaFunction, inv_context: InvocationContext1003    ) -> InvocationResult:1004        # apply plugin patches to prepare invocation context1005        result = self.apply_plugin_patches(inv_context)1006        if isinstance(result, InvocationResult):1007            return result1008        lambda_cwd = lambda_function.cwd1009        environment = self._prepare_environment(lambda_function)1010        if lambda_function.timeout:1011            environment["AWS_LAMBDA_FUNCTION_TIMEOUT"] = str(lambda_function.timeout)1012        context = inv_context.context1013        if context:1014            environment["AWS_LAMBDA_FUNCTION_NAME"] = context.function_name1015            environment["AWS_LAMBDA_FUNCTION_VERSION"] = context.function_version1016            environment["AWS_LAMBDA_FUNCTION_INVOKED_ARN"] = context.invoked_function_arn1017            environment["AWS_LAMBDA_FUNCTION_MEMORY_SIZE"] = str(context.memory_limit_in_mb)1018        # execute the Lambda function in a forked sub-process, sync result via queue1019        queue = Queue()1020        lambda_function_callable = lambda_function.function(inv_context.function_version)1021        def do_execute():1022            # now we're executing in the child process, safe to change CWD and ENV1023            result = None1024            try:1025                if lambda_cwd:1026                    os.chdir(lambda_cwd)1027                    sys.path.insert(0, "")1028                if environment:1029                    os.environ.update(environment)1030                # set default env variables required for most Lambda handlers1031                self.set_default_env_variables()1032                # run the actual handler function1033                result = lambda_function_callable(inv_context.event, context)1034            except Exception as e:1035                result = str(e)1036                sys.stderr.write("%s %s" % (e, traceback.format_exc()))1037                raise1038            finally:1039                queue.put(result)1040        process = Process(target=do_execute)1041        start_time = now(millis=True)1042        error = None1043        with CaptureOutput() as c:1044            try:1045                process.run()1046            except Exception as e:1047                error = e1048        result = queue.get()1049        end_time = now(millis=True)1050        # Make sure to keep the log line below, to ensure the log stream gets created1051        request_id = long_uid()1052        log_output = 'START %s: Lambda %s started via "local" executor ...' % (1053            request_id,1054            lambda_function.arn(),1055        )1056        # TODO: Interweaving stdout/stderr currently not supported1057        for stream in (c.stdout(), c.stderr()):1058            if stream:1059                log_output += ("\n" if log_output else "") + stream1060        if isinstance(result, InvocationResult) and result.log_output:1061            log_output += "\n" + result.log_output1062        log_output += "\nEND RequestId: %s" % request_id1063        log_output += "\nREPORT RequestId: %s Duration: %s ms" % (1064            request_id,1065            int((end_time - start_time) * 1000),1066        )1067        # store logs to CloudWatch1068        store_lambda_logs(lambda_function, log_output)1069        result = result.result if isinstance(result, InvocationResult) else result1070        if error:1071            LOG.info(1072                'Error executing Lambda "%s": %s %s',1073                lambda_function.arn(),1074                error,1075                "".join(traceback.format_tb(error.__traceback__)),1076            )1077            raise InvocationException(result, log_output)1078        # construct final invocation result1079        invocation_result = InvocationResult(result, log_output=log_output)1080        # run plugins post-processing logic1081        invocation_result = self.process_result_via_plugins(inv_context, invocation_result)1082        return invocation_result1083    def provide_file_to_lambda(self, local_file: str, inv_context: InvocationContext) -> str:1084        # This is a no-op for local executors - simply return the given local file path1085        return local_file1086    def execute_java_lambda(1087        self, event, context, main_file, lambda_function: LambdaFunction = None1088    ) -> InvocationResult:1089        lambda_function.envvars = lambda_function.envvars or {}1090        java_opts = config.LAMBDA_JAVA_OPTS or ""1091        handler = lambda_function.handler1092        lambda_function.envvars[LAMBDA_HANDLER_ENV_VAR_NAME] = handler1093        event_file = EVENT_FILE_PATTERN.replace("*", short_uid())1094        save_file(event_file, json.dumps(json_safe(event)))1095        TMP_FILES.append(event_file)1096        classpath = "%s:%s:%s" % (1097            main_file,1098            Util.get_java_classpath(main_file),1099            LAMBDA_EXECUTOR_JAR,1100        )1101        cmd = "java %s -cp %s %s %s" % (1102            java_opts,1103            classpath,1104            LAMBDA_EXECUTOR_CLASS,1105            event_file,1106        )1107        # apply plugin patches1108        inv_context = InvocationContext(1109            lambda_function, event, environment=lambda_function.envvars, lambda_command=cmd1110        )1111        result = self.apply_plugin_patches(inv_context)1112        if isinstance(result, InvocationResult):1113            return result1114        cmd = inv_context.lambda_command1115        LOG.info(cmd)1116        # execute Lambda and get invocation result1117        invocation_result = self._execute_in_custom_runtime(cmd, lambda_function=lambda_function)1118        return invocation_result1119    def execute_javascript_lambda(1120        self, event, context, main_file, lambda_function: LambdaFunction = None1121    ):1122        handler = lambda_function.handler1123        function = handler.split(".")[-1]1124        event_json_string = "%s" % (json.dumps(json_safe(event)) if event else "{}")1125        context_json_string = "%s" % (json.dumps(context.__dict__) if context else "{}")1126        cmd = [1127            "node",1128            "-e",1129            'require("%s").%s(%s,%s).then(r => process.stdout.write(JSON.stringify(r)))'1130            % (1131                main_file,1132                function,1133                event_json_string,1134                context_json_string,1135            ),1136        ]1137        LOG.info(cmd)1138        result = self._execute_in_custom_runtime(cmd, lambda_function=lambda_function)1139        return result1140    @staticmethod1141    def set_default_env_variables():1142        # set default env variables required for most Lambda handlers1143        default_env_vars = {"AWS_DEFAULT_REGION": aws_stack.get_region()}1144        env_vars_before = {var: os.environ.get(var) for var in default_env_vars}1145        os.environ.update({k: v for k, v in default_env_vars.items() if not env_vars_before.get(k)})1146        return env_vars_before1147    @staticmethod1148    def reset_default_env_variables(env_vars_before):1149        for env_name, env_value in env_vars_before.items():1150            env_value_before = env_vars_before.get(env_name)1151            os.environ[env_name] = env_value_before or ""1152            if env_value_before is None:1153                os.environ.pop(env_name, None)1154    def execute_go_lambda(self, event, context, main_file, lambda_function: LambdaFunction = None):1155        if lambda_function:1156            lambda_function.envvars["AWS_LAMBDA_FUNCTION_HANDLER"] = main_file1157            lambda_function.envvars["AWS_LAMBDA_EVENT_BODY"] = json.dumps(json_safe(event))1158        else:1159            LOG.warning("Unable to get function details for local execution of Golang Lambda")1160        cmd = GO_LAMBDA_RUNTIME1161        LOG.info(cmd)1162        result = self._execute_in_custom_runtime(cmd, lambda_function=lambda_function)1163        return result1164class Util:1165    debug_java_port = False1166    @classmethod1167    def get_java_opts(cls):1168        opts = config.LAMBDA_JAVA_OPTS or ""1169        # Replace _debug_port_ with a random free port1170        if "_debug_port_" in opts:1171            if not cls.debug_java_port:1172                cls.debug_java_port = get_free_tcp_port()1173            opts = opts.replace("_debug_port_", ("%s" % cls.debug_java_port))1174        else:1175            # Parse the debug port from opts1176            m = re.match(".*address=(.+:)?(\\d+).*", opts)1177            if m is not None:1178                cls.debug_java_port = m.groups()[1]1179        return opts1180    @classmethod1181    def get_host_path_for_path_in_docker(cls, path):1182        return re.sub(r"^%s/(.*)$" % config.TMP_FOLDER, r"%s/\1" % config.HOST_TMP_FOLDER, path)1183    @classmethod1184    def format_windows_path(cls, path):1185        temp = path.replace(":", "").replace("\\", "/")1186        if len(temp) >= 1 and temp[:1] != "/":1187            temp = "/" + temp1188        temp = "%s%s" % (config.WINDOWS_DOCKER_MOUNT_PREFIX, temp)1189        return temp1190    @classmethod1191    def docker_image_for_lambda(cls, lambda_function: LambdaFunction):1192        runtime = lambda_function.runtime or ""1193        if lambda_function.code.get("ImageUri"):1194            LOG.warning(1195                "ImageUri is set: Using Lambda container images is only supported in LocalStack Pro"1196            )1197        docker_tag = runtime1198        docker_image = config.LAMBDA_CONTAINER_REGISTRY1199        # TODO: remove prefix once execution issues are fixed with dotnetcore/python lambdas1200        #  See https://github.com/lambci/docker-lambda/pull/2181201        lambdas_to_add_prefix = [1202            "dotnetcore2.0",1203            "dotnetcore2.1",1204            "python3.6",1205            "python3.7",...
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