/
loadbalancer.py
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/
loadbalancer.py
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# SPDX-License-Identifier: AGPL-3.0-or-later
import sys
from time import sleep
from loguru import logger
import openstack
from oslo_config import cfg
from prompt_toolkit import prompt
import pymysql
PROJECT_NAME = "loadbalancer"
CONF = cfg.CONF
opts = [
cfg.BoolOpt("debug", help="Enable debug logging", default=False),
cfg.StrOpt("connection", help="Database connection string", default=None),
cfg.StrOpt("loadbalancer", help="Loadbalancer ID to handle", default=None),
cfg.StrOpt(
"type",
help="Status type to handle",
default="provisioning_status",
choices=["provisioning_status", "operating_status"],
),
cfg.StrOpt("cloud", help="Cloud name in clouds.yaml", default="service"),
]
CONF.register_cli_opts(opts)
CONF(sys.argv[1:], project=PROJECT_NAME)
SLEEP_WAIT_FOR_AMPHORA_BOOT = 5
TIMEOUT_WAIT_FOR_AMPHORA_BOOT = 120
if CONF.debug:
level = "DEBUG"
else:
level = "INFO"
log_fmt = (
"<green>{time:YYYY-MM-DD HH:mm:ss}</green> | <level>{level: <8}</level> | "
"<level>{message}</level>"
)
logger.remove()
logger.add(sys.stderr, format=log_fmt, level=level, colorize=True)
# MariaDB [octavia]> describe load_balancer;
# +---------------------+--------------+------+-----+---------+-------+
# | Field | Type | Null | Key | Default | Extra |
# +---------------------+--------------+------+-----+---------+-------+
# | project_id | varchar(36) | YES | | NULL | |
# | id | varchar(36) | NO | PRI | NULL | |
# | name | varchar(255) | YES | | NULL | |
# | description | varchar(255) | YES | | NULL | |
# | provisioning_status | varchar(16) | NO | MUL | NULL | |
# | operating_status | varchar(16) | NO | MUL | NULL | |
# | enabled | tinyint(1) | NO | | NULL | |
# | topology | varchar(36) | YES | MUL | NULL | |
# | server_group_id | varchar(36) | YES | | NULL | |
# | created_at | datetime | YES | | NULL | |
# | updated_at | datetime | YES | | NULL | |
# | provider | varchar(64) | YES | | NULL | |
# | flavor_id | varchar(36) | YES | MUL | NULL | |
# | availability_zone | varchar(255) | YES | MUL | NULL | |
# +---------------------+--------------+------+-----+---------+-------+
def wait_for_amphora_boot(loadbalancer_id):
global cloud
logger.info(
f"Wait up to {TIMEOUT_WAIT_FOR_AMPHORA_BOOT} seconds for amphora boot of loadbalancer {loadbalancer_id}"
)
i = TIMEOUT_WAIT_FOR_AMPHORA_BOOT / SLEEP_WAIT_FOR_AMPHORA_BOOT
while i:
amphorae = cloud.load_balancer.amphorae(
loadbalancer_id=loadbalancer_id, status="BOOTING"
)
if not [1 for x in amphorae]:
break
i = i - 1
sleep(SLEEP_WAIT_FOR_AMPHORA_BOOT)
def reset_load_balancer_operating_status(load_balancer):
global database
with database.cursor() as cursor:
query = f"UPDATE load_balancer SET operating_status = 'ONLINE' WHERE id = '{load_balancer.id}';"
logger.debug(query)
cursor.execute(query)
database.commit()
def reset_load_balancer_provisioning_status(load_balancer):
global database
with database.cursor() as cursor:
query = f"UPDATE load_balancer SET provisioning_status = 'ACTIVE' WHERE id = '{load_balancer.id}';"
logger.debug(query)
cursor.execute(query)
database.commit()
def set_error_load_balancer_provisioning_status(load_balancer):
global database
with database.cursor() as cursor:
query = f"UPDATE load_balancer SET provisioning_status = 'ERROR' WHERE id = '{load_balancer.id}';"
logger.debug(query)
cursor.execute(query)
database.commit()
# Connect to the OpenStack environment
cloud = openstack.connect(cloud=CONF.cloud)
# Connect to the database
# NOTE: Beautify this
connection_parts = CONF.connection.split("//")[1]
db_username = connection_parts.split(":")[0]
db_password = connection_parts.split(":")[1].split("@")[0]
db_host = connection_parts.split("@")[1].split(":")[0]
db_port = int(connection_parts.split("@")[1].split(":")[1].split("/")[0])
db_database = connection_parts.split("@")[1].split(":")[1].split("/")[1]
database = pymysql.connect(
host=db_host,
port=db_port,
user=db_username,
password=db_password,
database=db_database,
cursorclass=pymysql.cursors.DictCursor,
)
if CONF.loadbalancer and CONF.type == "provisioning_status":
load_balancer = cloud.load_balancer.get_load_balancer(CONF.loadbalancer)
logger.info(
f"Loadbalancer {load_balancer.name} is in provisioning_status '{load_balancer.provisioning_status}'"
)
if load_balancer.provisioning_status == "PENDING_CREATE":
result = prompt(f"Delete loadbalancer {CONF.loadbalancer} [yes/no]: ")
if result == "yes":
logger.info(f"Deleting {load_balancer.name}")
set_error_load_balancer_provisioning_status(load_balancer)
cloud.load_balancer.delete_load_balancer(load_balancer.id)
elif load_balancer.provisioning_status == "PENDING_UPDATE":
result = prompt(f"Reset loadbalancer {CONF.loadbalancer} [yes/no]: ")
if result == "yes":
logger.info(f"Resetting {load_balancer.name}")
reset_load_balancer_provisioning_status(load_balancer)
logger.info(f"Triggering failover for {load_balancer.name}")
cloud.load_balancer.failover_load_balancer(load_balancer.id)
sleep(10) # wait for the octavia API
wait_for_amphora_boot(load_balancer.id)
# This only works when there is at least on working amphora. Therefore, this is only useful
# if the load balancer ID is explicitly specified.
elif load_balancer.provisioning_status == "ERROR":
result = prompt(f"Reset loadbalancer {CONF.loadbalancer} [yes/no]: ")
if result == "yes":
logger.info(f"Resetting {load_balancer.name}")
reset_load_balancer_provisioning_status(load_balancer)
cloud.load_balancer.failover_load_balancer(load_balancer.id)
sleep(10) # wait for the octavia API
wait_for_amphora_boot(load_balancer.id)
else:
logger.error(
f"{CONF.loadbalancer} has to be in provisioning_status PENDING_UPDATE or PENDING_CREATE"
)
sys.exit(1)
elif not CONF.loadbalancer and CONF.type == "provisioning_status":
load_balancers = cloud.load_balancer.load_balancers(
provisioning_status="PENDING_UPDATE"
)
for load_balancer in load_balancers:
logger.info(
f"Loadbalancer {load_balancer.name} is in provisioning_status PENDING_UPDATE"
)
result = prompt(f"Reset loadbalancer {load_balancer.name} [yes/no]: ")
if result == "yes":
logger.info(f"Resetting {load_balancer.name}")
reset_load_balancer_provisioning_status(load_balancer)
logger.info(f"Triggering failover for {load_balancer.name}")
cloud.load_balancer.failover_load_balancer(load_balancer.id)
sleep(10) # wait for the octavia API
wait_for_amphora_boot(load_balancer.id)
else:
logger.debug(f"Skipping {load_balancer.name}")
elif CONF.loadbalancer and CONF.type == "operating_status":
load_balancer = cloud.load_balancer.get_load_balancer(CONF.loadbalancer)
if load_balancer.operating_status != "ERROR":
logger.error(f"{CONF.loadbalancer} has to be in operating_status ERROR")
sys.exit(1)
elif load_balancer.provisioning_status != "ACTIVE":
logger.error(f"{CONF.loadbalancer} has to be in provisioning_status ACTIVE")
sys.exit(1)
result = prompt(f"Reset loadbalancer {CONF.loadbalancer} [yes/no]: ")
if result == "yes":
logger.info(f"Resetting {load_balancer.name}")
reset_load_balancer_operating_status(load_balancer)
logger.info(f"Triggering failover for {load_balancer.name}")
cloud.load_balancer.failover_load_balancer(load_balancer.id)
sleep(10) # wait for the octavia API
wait_for_amphora_boot(load_balancer.id)
elif not CONF.loadbalancer and CONF.type == "operating_status":
load_balancers = cloud.load_balancer.load_balancers(provisioning_status="ERROR")
for load_balancer in load_balancers:
logger.info(f"Loadbalancer {load_balancer.name} is in operating_status ERROR")
if load_balancer.provisioning_status != "ACTIVE":
logger.error(f"{CONF.loadbalancer} has to be in provisioning_status ACTIVE")
sys.exit(1)
result = prompt(f"Reset loadbalancer {load_balancer.name} [yes/no]: ")
if result == "yes":
logger.info(f"Resetting {load_balancer.name}")
reset_load_balancer_operating_status(load_balancer)
logger.info(f"Triggering failover for {load_balancer.name}")
cloud.load_balancer.failover_load_balancer(load_balancer.id)
sleep(10) # wait for the octavia API
wait_for_amphora_boot(load_balancer.id)
else:
logger.debug(f"Skipping {load_balancer.name}")