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backup_binlog.py
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backup_binlog.py
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# -*- coding: utf-8 -*-
# 该脚本的作用是为了备份金融端口数据库每天的binlog
import datetime
from pathlib import Path
from mtk.alert import sender
from mtk.utils.cmd import exec_cmd
from mtk.mysql.backup import financial_ports
from mtk.mysql.runtime import get_mysql_running_ports, get_mysql_runtime_instances
instances = get_mysql_runtime_instances()
today = datetime.date.today()
NFSHOST = 'mysqlnfs.produce.zs'
archive_base_dir = Path('/data1/mysqlbinlog')
archive_today_dir = archive_base_dir / "{}".format(today)
# 得到该机器上的金融端口实例列表，（金融端口数据库在5.6和5.7均存在）
def running_ports():
empty_port = []
for port in financial_ports:
if port in get_mysql_running_ports():
empty_port.append(port)
return empty_port
# 得到binlog.index文件中的最后一个binlog文件名
def tail_n(file, n):
with open(file) as f:
x = f.readlines()
return x[-n].strip()
# 得到datadir、log-bin、以及全部binlog
def dir_bin_all_binlog(port):
i = instances[port]
data_dir = i.config['datadir']
if "log_bin" in i.config:
log_bin = i.config["log_bin"]
else:
log_bin = i.config["log-bin"]
datadir = Path(data_dir)
empty = []
for dir in datadir.iterdir():
if dir.name.startswith("{}".format(log_bin)):
empty.append(dir)
return datadir, log_bin, empty
# Python中执行shell命令，得到返回结果
def exec_bash_cmd(cmd):
rc, stdout, stderr = exec_cmd(cmd)
if rc != 0:
sender.send_all("exec_bash_cmd is failed.cmd:{}.stder:{}".format(cmd, stderr))
result = stdout.strip()
return result
# 执行rsync，远程归档传输
def rsync_binlog(binlog, ports):
dir = archive_today_dir / "{}".format(ports)
cmd1 = "rsync -avzP --bwlimit=5000 {} {}:{}".format(binlog, NFSHOST, dir)
rc, stdout, stderr = exec_cmd(cmd1)
if rc != 0:
sender.send_all("rsync binlog is failed.cmd:{}.stder:{}".format(cmd1, stderr))
def bak_bin():
# 获取归档机器中，最大日期的备份目录
cmd1 = "ssh {}".format(NFSHOST) + ' "/bin/ls {}"'.format(archive_base_dir)
list_date = exec_bash_cmd(cmd1).split("\n")
max_date = max(list_date)
# 在归档机器上创建今天的备份目录
for port in running_ports():
cmd_mkdir_date = "ssh {}".format(NFSHOST) + ' "/bin/mkdir -p {}/{}" '.format(archive_today_dir, port)
rc, stdout, stderr = exec_cmd(cmd_mkdir_date)
if rc != 0:
sender.send_all("mkdir archive date dir is failed.cmd:{}.stder:{}".format(cmd_mkdir_date, stderr))
# 判断上一次的备份端口数和金融端口实例数是否一致（为了防止新添加金融实例，新实例需要备份所有binlog）
archive_max_dir = archive_base_dir / "{}".format(max_date)
cmd1 = "ssh {}".format(NFSHOST) + ' "/bin/ls {}"'.format(archive_max_dir)
list_port = exec_bash_cmd(cmd1).split("\n")
if len(list_port) != len(financial_ports):
for p in running_ports():
# 获得binlog文件的前缀、datadir、以及binlog.index
log_bin = dir_bin_all_binlog(p)[1]
datadir = dir_bin_all_binlog(p)[0]
index = log_bin + ".index"
binlog_index = datadir / "{}".format(index)
# 如果不存在于list_port中，证明上次备份没有备份该文件，需要获取所有的binlog
if str(p) not in list_port:
all_binlog = dir_bin_all_binlog(p)[2]
cmd = "/usr/local/mysql/bin/mysql -uroot -S /tmp/mysql_{}.sock -e 'flush logs;'".format(p)
rc, stdout, stderr = exec_cmd(cmd)
if rc != 0:
sender.send_all("flush log is failed.cmd:{}.stder:{}".format(cmd, stderr))
# 上一步执行刷新日志命令，因此最新的日志不需要拷贝，需要增加判断
tail_bin = tail_n(binlog_index, 1).lstrip("./")
for binlog in all_binlog:
if str(binlog) != str(datadir / "{}".format(tail_bin)):
rsync_binlog(binlog, p)
else:
# 如果存在于list_port中，证明没有新添加金融端口的数据库，拷贝最后一次的binlog文件即可
tail_bin = tail_n(binlog_index, 1).lstrip("./")
cmd = "/usr/local/mysql/bin/mysql -uroot -S /tmp/mysql_{}.sock -e 'flush logs;'".format(p)
rc, stdout, stderr = exec_cmd(cmd)
if rc != 0:
sender.send_all("flush log is failed.cmd:{}.stder:{}".format(cmd, stderr))
tail_binlog = datadir / "{}".format(tail_bin)
rsync_binlog(tail_binlog, p)
rsync_binlog(binlog_index, p)
if __name__ == '__main__':
bak_bin()