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# -*- coding: utf-8 -*-
#
# Copyright 2022 Michal Arbet (kevko)
#
# 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
#
# http://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.
from jinja2.filters import pass_context
from jinja2.runtime import Undefined
from kolla_ansible.exception import FilterError
from kolla_ansible.helpers import _call_bool_filter
@pass_context
def database_shards_info(context, hostnames):
"""returns dict with database shards info
Returned dict looks as example below:
"database_shards_info": {
"shards": {
"0": {
"hosts": [
"controller0",
"controller1",
"controller2"
]
},
"1": {
"hosts": [
"controller3",
"controller4",
"controller5"
]
}
},
"users": [
{
"password": "secret",
"shard_id": "0",
"user": "root_shard_0"
},
{
"password": "secret",
"shard_id": "0",
"user": "backup_shard_0"
},
{
"password": "secret",
"shard_id": "1",
"user": "root_shard_1"
},
{
"password": "secret",
"shard_id": "1",
"user": "backup_shard_1"
}
]
}
:param context: Jinja2 Context
:param hostnames: List of database hosts
:returns: Dict with database shards info
"""
hostvars = context.get('hostvars')
if isinstance(hostvars, Undefined):
raise FilterError("'hostvars' variable is unavailable")
shards_info = {'shards': {}, 'users': []}
for hostname in hostnames:
host = hostvars.get(hostname)
if isinstance(host, Undefined):
raise FilterError(f"'{hostname}' not in 'hostvars'")
host_shard_id = host.get('mariadb_shard_id')
if host_shard_id is None:
raise FilterError(f"'mariadb_shard_id' is undefined "
"for host '{hostname}'")
else:
host_shard_id = str(host_shard_id)
if host_shard_id not in shards_info['shards']:
shards_info['shards'][host_shard_id] = {'hosts': [hostname]}
backup_enabled = host.get('enable_mariabackup')
if backup_enabled is None:
raise FilterError("'enable_mariabackup' variable is "
"unavailable")
backup_enabled = _call_bool_filter(context, backup_enabled)
db_password = host.get('database_password')
if db_password is None:
raise FilterError("'database_password' variable is "
"unavailable")
db_root_prefix = host.get('mariadb_shard_root_user_prefix')
if db_root_prefix is None:
raise FilterError("'mariadb_shard_root_user_prefix' variable "
"is unavailable")
db_user = f"{db_root_prefix}{host_shard_id}"
user_dict = {'password': db_password, 'user': db_user,
'shard_id': host_shard_id}
shards_info['users'].append(user_dict)
if backup_enabled:
db_backup_prefix = host.get('mariadb_shard_backup_user_prefix')
if db_backup_prefix is None:
raise FilterError("'mariadb_shard_backup_user_prefix' "
"variable is unavailable")
db_user = f"{db_backup_prefix}{host_shard_id}"
user_dict = {'password': db_password, 'user': db_user,
'shard_id': host_shard_id}
shards_info['users'].append(user_dict)
else:
shards_info['shards'][host_shard_id]['hosts'].append(hostname)
return shards_info