How to use reserve_port method in localstack

Best Python code snippet using localstack_python

mm_cluster.py

Source:mm_cluster.py

...30        # connection settings31        self.dbname = dbname32        self.username = username33        # generate pairs of ports for multimaster34        self.ports = [(reserve_port(), reserve_port()) for _ in range(nodes)]35        # generate connection string36        conn_strings = self._build_mm_conn_strings(self.ports,37                                                   dbname,38                                                   username)39        for i in range(nodes):40            pg_port, mm_port = self.ports[i]41            node_id = i + 142            node = ClusterNode(name=''.join(['node_', str(node_id)]),43                               pg_port=pg_port,44                               mm_port=mm_port)45            node.init().mm_init(node_id,46                                max_nodes,47                                conn_strings,48                                max_connections)49            self.nodes.append(node)50    @staticmethod51    def _get_mm_conn_string():52        return (53            "host=127.0.0.1 "54            "dbname={} "55            "user={} "56            "port={} "57            "arbiter_port={}"58        )59    @staticmethod60    def _build_mm_conn_strings(ports, dbname, username):61        return ','.join([62            Cluster63            ._get_mm_conn_string()64            .format(dbname,65                    username,66                    pg_port,67                    mm_port) for pg_port, mm_port in ports68        ])69    def __enter__(self):70        return self71    def __exit__(self, type, value, traceback):72        self.cleanup()73    def free_ports(self):74        for p1, p2 in self.ports:75            release_port(p1)76            release_port(p2)77    def free_nodes(self):78        for node in self.nodes:79            node.cleanup()80    def cleanup(self):81        self.free_nodes()82        self.free_ports()83        return self84    def start(self):85        for node in self.nodes:86            node.start()87        return self88    def stop(self):89        for node in self.nodes:90            node.stop()91        return self92    def restart(self):93        for node in self.nodes:94            node.restart()95        return self96    def reload(self):97        for node in self.nodes:98            node.reload()99        return self100    def print_conninfo(self):101        print(self._build_mm_conn_strings(self.ports,102                                            self.dbname,103                                            self.username))104    def install(self):105        for node in self.nodes:106            node.safe_psql("create extension multimaster;",107                         dbname=self.dbname,108                         username=self.username)109        return self110    def add_node(self):111        if len(self.nodes) == self.max_nodes:112            raise Exception("max amount of nodes reached ({})"113                            .format(self.max_nodes))114        pg_port, mm_port = reserve_port(), reserve_port()115        node_id = len(self.nodes) + 1116        # request multimaster config changes117        conn_string = self._get_mm_conn_string().format(self.dbname,118                                                        self.username,119                                                        pg_port,120                                                        mm_port)121        add_node_cmd = "select mtm.add_node('{}')".format(conn_string)122        self.execute_any(dbname=self.dbname,123                         username=self.username,124                         query=add_node_cmd,125                         commit=True)126        # copy node with new ports127        backup = self.node_any().backup()128        node = backup.spawn_primary(name=''.join(['node_', str(node_id)]),...

port.py

Source:port.py

...18        if res:19            return str(res[0][0])20        else:21            return None22    def reserve_port(self, cr, project_name, db_name):23        cr.execute(24            "SELECT port FROM port_mapping WHERE project=%s", (project_name,)25        )26        port_used = [x[0] for x in cr.fetchall()]27        project_config = config["projects"][project_name]28        start_port = project_config["port_mapping_start"]29        stop_port = start_port + project_config["port_mapping_max"]30        for port in range(start_port, stop_port):31            if port not in port_used:32                cr.execute(33                    """INSERT INTO port_mapping(34                        project, date, db_name, port35                    )36                    VALUES(%s, now(), %s, %s);37                """,38                    (project_name, db_name, port),39                )40                return str(port)41        return abort(42            404, "Not more available port please stop existing review apps"43        )44    def lock(self, project_name, db_name):45        with cursor() as cr:46            port = self.get_existing_port(cr, project_name, db_name)47            if port:48                return port49            else:50                return self.reserve_port(cr, project_name, db_name)51    def release(self, project_name, db_name):52        with cursor() as cr:53            cr.execute(54                """DELETE FROM port_mapping55                WHERE project=%s AND db_name=%s""",56                (project_name, db_name),57            )58        return "OK"59    def redirect(self, project_name, db_name):60        with cursor() as cr:61            port = self.get_existing_port(cr, project_name, db_name)62        if port:63            domain = config["projects"][project_name]["domain"]64            return redirect("https://{}:{}".format(domain, port))...

final.py

Source:final.py

...21            return custom_endpoint.endpoint22    engine_domain = 'opensearch' if engine_type == EngineType.OpenSearch else 'es'23    if config.OPENSEARCH_ENDPOINT_STRATEGY == 'port':24        try:25            assigned_port = external_service_ports.reserve_port(preferred_port)26        except PortNotAvailableException:27            LOG.warning(f"Preferred port {preferred_port} is not available, trying to reserve another port.")28            assigned_port = external_service_ports.reserve_port()29            assigned_port = external_service_ports.reserve_port()30        else:31            return f"{config.LOCALSTACK_HOSTNAME}:{assigned_port}"32    if config.OPENSEARCH_ENDPOINT_STRATEGY == 'path':33        return f"{config.LOCALSTACK_HOSTNAME}:{config.EDGE_PORT}/{engine_domain}/{domain_key.region}/{domain_key.domain_name}"34    return f"{domain_key.domain_name}.{domain_key.region}.{engine_domain}.{LOCALHOST_HOSTNAME}:{config.EDGE_PORT}"...

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