create_test_database.py

# -*- coding: utf-8 -*-
#
# Copyright 2021 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import configparser
import os
import time

from google.api_core.exceptions import ResourceExhausted
from google.cloud.spanner_v1 import Client
from google.cloud.spanner_v1.instance import Instance


USE_EMULATOR = os.getenv("SPANNER_EMULATOR_HOST") is not None

PROJECT = os.getenv(
    "GOOGLE_CLOUD_PROJECT", os.getenv("PROJECT_ID", "emulator-test-project"),
)
CLIENT = None

if USE_EMULATOR:
    from google.auth.credentials import AnonymousCredentials

    CLIENT = Client(project=PROJECT, credentials=AnonymousCredentials())
else:
    CLIENT = Client(project=PROJECT)


def delete_stale_test_instances():
    """Delete test instances that are older than four hours."""
    cutoff = int(time.time()) - 4 * 60 * 60
    instances_pbs = CLIENT.list_instances(
        "labels.python-spanner-sqlalchemy-systest:true"
    )
    for instance_pb in instances_pbs:
        instance = Instance.from_pb(instance_pb, CLIENT)
        if "created" not in instance.labels:
            continue
        create_time = int(instance.labels["created"])
        if create_time > cutoff:
            continue
        # Backups are not used in sqlalchemy dialect test,
        # therefore instance can just be deleted.
        try:
            instance.delete()
        except ResourceExhausted:
            print(
                "Unable to drop stale instance '{}'. May need manual delete.".format(
                    instance.instance_id
                )
            )


def create_test_instance():
    configs = list(CLIENT.list_instance_configs())
    if not USE_EMULATOR:
        # Filter out non "us" locations
        configs = [config for config in configs if "-us-" in config.name]

    instance_config = configs[0].name
    create_time = str(int(time.time()))
    unique_resource_id = "%s%d" % ("-", 1000 * time.time())
    instance_id = (
        "sqlalchemy-dialect-test"
        if USE_EMULATOR
        else "sqlalchemy-test" + unique_resource_id
    )
    labels = {"python-spanner-sqlalchemy-systest": "true", "created": create_time}

    instance = CLIENT.instance(instance_id, instance_config, labels=labels)

    created_op = instance.create()
    created_op.result(120)  # block until completion

    database = instance.database("compliance-test")
    created_op = database.create()
    created_op.result(120)

    config = configparser.ConfigParser()
    url = "spanner:///projects/{project}/instances/{instance_id}/databases/compliance-test".format(
        project=PROJECT, instance_id=instance_id
    )
    config.add_section("db")
    config["db"]["default"] = url

    with open("test.cfg", "w") as configfile:
        config.write(configfile)


delete_stale_test_instances()
create_test_instance()