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handlers.py
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handlers.py
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#!/usr/bin/env python3
import os
import kopf
import lib
import lib.pgbouncer
@kopf.on.startup()
async def startup(**_):
con = lib.connect_to_postgres()
con.close()
if lib.pgbouncer.enabled():
con = lib.pgbouncer.connect_to_postgres()
lib.pgbouncer.create_database(con)
con.close()
@kopf.on.create('postgres.database.k8s.jkroepke.de', 'v1alpha1', 'postgresdatabases')
def create(body: dict, spec: dict, meta: dict, **_):
db_name = lib.generate_db_name(meta.get('namespace'), meta.get('name'))
db_username = lib.generate_db_username(meta.get('namespace'), meta.get('name'))
kopf.info(body, reason='Scheduled', message='Start creating database: {}'.format(db_name))
operator_db_username = os.getenv('POSTGRES_USER')
try:
con = lib.connect_to_postgres()
except Exception as e:
message = "Can't connect to database: " + str(e)
raise kopf.TemporaryError(message)
db_password = lib.generate_password(40)
try:
lib.create_db_username(con, db_username, db_password)
lib.grant_role_to_current_user(con, db_username, operator_db_username)
if lib.pgbouncer.enabled():
con_proxy = lib.pgbouncer.connect_to_postgres()
lib.pgbouncer.insert_db_username(con_proxy, db_username, db_password)
con_proxy.close()
message = "Created user {0}.".format(db_username)
kopf.info(body, reason="Create user", message=message)
except Exception as e:
con.close()
message = "Can't create user: {}".format(str(e))
raise kopf.PermanentError(message)
try:
db_comment = "@".join([
meta.get('namespace'),
meta.get('name')
])
lib.create_db(con, db_name, db_username, spec.get('encoding'), spec.get('lcCollate'), spec.get('lcCollate'),
db_comment)
lib.grant_connect_on_db(con, db_name, db_username)
lib.grant_connect_on_db(con, db_name, operator_db_username)
message = "Created database {}.".format(db_name)
kopf.info(body, reason="Create database", message=message)
except Exception as e:
lib.delete_db(con, db_name, db_username)
lib.delete_db_username(con, db_username)
con.close()
message = "Can't create database: {}".format(str(e))
raise kopf.PermanentError(message)
secret_name = spec.get('secretName')
db_host = os.getenv('POSTGRES_PROXY_HOST', os.getenv('POSTGRES_HOST'))
secret_doc = lib.generate_kubernetes_secret(
secret_name,
db_host, os.getenv('POSTGRES_POST', '5432'),
db_name, db_username, db_password
)
# Make it our child: assign the namespace, name, labels, owner references, etc.
kopf.adopt(secret_doc)
try:
secret = lib.create_kubernetes_secret(secret_doc)
kopf.info(secret_doc, reason='Successful Create', message='Secret created: {}'.format(secret_name))
except Exception as e:
lib.delete_db(con, db_name, db_username)
lib.delete_db_username(con, db_username)
con.close()
message = "Can't create secret '{}': {}".format(secret_name, str(e))
raise kopf.PermanentError(message)
con.close()
kopf.info(body, reason='Successful Create', message='Database successfully created')
return {'children': [secret.metadata['uid']]}
@kopf.on.update('postgres.database.k8s.jkroepke.de', 'v1alpha1', 'postgresdatabases')
def update(**_):
pass
@kopf.on.delete('postgres.database.k8s.jkroepke.de', 'v1alpha1', 'postgresdatabases')
def delete(body: dict, meta: dict, **_):
db_name = lib.generate_db_name(meta.get('namespace'), meta.get('name'))
db_username = lib.generate_db_username(meta.get('namespace'), meta.get('name'))
kopf.info(body, reason='Killing', message='Killing database: {}'.format(db_name))
# connect to DB
try:
con = lib.connect_to_postgres()
except Exception as e:
message = "Can't connect to database: " + str(e)
raise kopf.TemporaryError(message)
# reject new connections and delete database
try:
lib.delete_db(con, db_name, db_username)
message = "Deleted database: {}.".format(db_name)
kopf.info(body, reason="Database Deleted", message=message)
except Exception as e:
con.close()
message = "Can't delete postgresql database: {}".format(str(e))
raise kopf.TemporaryError(message, delay=10.0)
# delete database owner
try:
lib.delete_db_username(con, db_username)
if lib.pgbouncer.enabled():
con_proxy = lib.pgbouncer.connect_to_postgres()
lib.pgbouncer.remove_db_username(con_proxy, db_username)
con_proxy.close()
message = "Deleted user: {}.".format(db_username)
kopf.info(body, reason="User deleted", message=message)
except Exception as e:
con.close()
message = "Can't delete postgresql user: {}".format(str(e))
raise kopf.TemporaryError(message, delay=10.0)
con.close()
kopf.info(body, reason='Killed', message='Database successfully killed')
return {'message': message}