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| 1 | +#!/usr/local/bin/python3 |
| 2 | + |
| 3 | +import os |
| 4 | +import sys |
| 5 | +import json |
| 6 | +import socket |
| 7 | +import re |
| 8 | + |
| 9 | +def execute_sql(server_id, query): |
| 10 | + socket = f'{socket_path}/mysqld.{server_id}.sock' |
| 11 | + stream = os.popen( |
| 12 | + f'mysql --no-defaults -S {socket} -u root -D test -sNe "{query}"' |
| 13 | + ) |
| 14 | + return stream.read().strip() |
| 15 | + |
| 16 | +def ip(): |
| 17 | + stream = os.popen( |
| 18 | + f'hostname -i' |
| 19 | + ) |
| 20 | + return stream.read().strip() |
| 21 | + |
| 22 | +num_servers = int(sys.argv[1]) |
| 23 | +socket_path = sys.argv[2] |
| 24 | + |
| 25 | +hostname = socket.gethostname() |
| 26 | +hostname = hostname.replace('.facebook.com', '') |
| 27 | +dc = hostname.split(".")[1] |
| 28 | +region = re.sub('[0-9]+$', '', dc) |
| 29 | +ip = ip() |
| 30 | + |
| 31 | +config={} |
| 32 | + |
| 33 | +for i in range(1, num_servers + 1): |
| 34 | + uuid = execute_sql(i, "select @@global.server_uuid") |
| 35 | + server_id = int(execute_sql(i, "select @@global.server_id")) |
| 36 | + port = execute_sql(i, "select @@global.port") |
| 37 | + |
| 38 | + config["bootstrap"] = True |
| 39 | + config["commit_rule"] = {"mode": 2} |
| 40 | + config["replicaset_name"] = "mysql.replicaset.0" |
| 41 | + server_config = {} |
| 42 | + server_config["region"] = region |
| 43 | + server_config["hostname"] = hostname |
| 44 | + server_config["ip_port"] = f"[{ip}]:{port}" |
| 45 | + server_config["uuid"] = uuid |
| 46 | + server_config["backed_by_database"] = True |
| 47 | + server_config["voter_type"] = 0 |
| 48 | + server_config["server_id"] = server_id |
| 49 | + config["server_config"] = server_config |
| 50 | + |
| 51 | + server_props = [] |
| 52 | + |
| 53 | + for j in range(1, num_servers + 1): |
| 54 | + uuid = execute_sql(j, "select @@global.server_uuid") |
| 55 | + server_id = int(execute_sql(j, "select @@global.server_id")) |
| 56 | + port = execute_sql(j, "select @@global.port") |
| 57 | + server_prop = {} |
| 58 | + server_prop["region"] = region |
| 59 | + server_prop["hostname"] = hostname |
| 60 | + server_prop["ip_port"] = f"[{ip}]:{port}" |
| 61 | + server_prop["uuid"] = uuid |
| 62 | + server_prop["server_id"] = server_id |
| 63 | + server_prop["backed_by_database"] = True |
| 64 | + server_prop["voter_type"] = 0 |
| 65 | + server_props.append(server_prop) |
| 66 | + |
| 67 | + config["raft_topology"] = {"raft_server_properties": server_props} |
| 68 | + config["voter_distribution"] = {region: num_servers} |
| 69 | + config["enable_flexiraft"] = False |
| 70 | + |
| 71 | + config_str = json.dumps(config) |
| 72 | + config_str = config_str.replace('"', r'\"') |
| 73 | + execute_sql(i, f"set @@global.rpl_raft_topology_config_json='{config_str}'") |
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