harbor/tools/migration/migrator.py

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import abc
import subprocess
from optparse import OptionParser
from shutil import copyfile
import os
import sys
import argparse
if sys.version_info[:3][0] == 2:
import ConfigParser as ConfigParser
import StringIO as StringIO
if sys.version_info[:3][0] == 3:
import configparser as ConfigParser
import io as StringIO
RC_VALIDATE = 101
RC_UP = 102
RC_DOWN = 103
RC_BACKUP = 104
RC_RESTORE = 105
RC_UNNKNOW_TYPE = 106
RC_GEN = 110
class DBMigrator():
def __init__(self, target):
path = "/harbor-migration/harbor-cfg/harbor.cfg"
env = ""
if os.path.exists(path):
temp_section = "configuration"
conf = StringIO.StringIO()
conf.write("[%s]\n" % temp_section)
conf.write(open(path).read())
conf.seek(0, os.SEEK_SET)
rcp = ConfigParser.RawConfigParser()
rcp.readfp(conf)
if rcp.get(temp_section, "admiral_url") != "NA":
env = "WITH_ADMIRAL=true"
else:
print("harbor.cfg not found, WITH_ADMIRAL will not be set to true")
self.target = target
self.script = env + " ./db/run.sh"
def backup(self):
return run_cmd(self.script + " backup") == 0
def restore(self):
return run_cmd(self.script + " restore") == 0
def up(self):
cmd = self.script + " up"
if self.target != '':
cmd = cmd + " " + self.target
return run_cmd(cmd) == 0
def validate(self):
return run_cmd(self.script + " test") == 0
class CfgMigrator():
def __init__(self, target, output):
self.target = target
self.output = output
self.cfg_path = "/harbor-migration/harbor-cfg/harbor.cfg"
self.backup_path = "/harbor-migration/backup"
self.output_path = "/harbor-migration/output"
def backup(self):
try:
copyfile(self.cfg_path, self.backup_path+"/harbor.cfg")
print ("Success to backup harbor.cfg.")
return True
except Exception, e:
print ("Back up error: %s" % str(e))
return False
def restore(self):
if not os.path.exists(self.backup_path+"/harbor.cfg"):
print ("Unable to restore as there is no harbor.cfg")
return False
try:
copyfile(self.backup_path+"/harbor.cfg", self.cfg_path)
print ("Success to restore harbor.cfg.")
return True
except Exception, e:
print ("Restore error: %s" % str(e))
return False
def up(self):
if not os.path.exists(self.cfg_path):
print ("Skip cfg up as no harbor.cfg in the path.")
return True
if self.output and os.path.isdir(self.output_path):
cmd = "python ./cfg/run.py --input " + self.cfg_path + " --output " + self.output_path + "/harbor.cfg"
else:
print ("The path of the migrated harbor.cfg is not set, the input file will be overwritten.")
cmd = "python ./cfg/run.py --input " + self.cfg_path
if self.target != '':
cmd = cmd + " --target " + self.target
return run_cmd(cmd) == 0
def validate(self):
if not os.path.exists(self.cfg_path):
print ("Unable to loacte the harbor.cfg, please check.")
return False
print ("Success to validate harbor.cfg.")
return True
class Parameters(object):
def __init__(self):
self.db_user = os.getenv('DB_USR', '')
self.db_pwd = os.getenv('DB_PWD', '')
self.skip_confirm = os.getenv('SKIP_CONFIRM', 'n')
self.output = False
self.is_migrate_db = True
self.is_migrate_cfg = True
self.target_version = ''
self.action = ''
self.init_from_input()
def is_action(self, action):
if action == "test" or action == "backup" or action == "restore" or action == "up":
return True
else:
return False
def parse_input(self):
argv_len = len(sys.argv[1:])
last_argv = sys.argv[argv_len:][0]
if not self.is_action(last_argv):
print ("Fail to parse input: the last parameter should in test:up:restore:backup")
sys.exit(RC_GEN)
if last_argv == 'up':
if self.skip_confirm != 'y':
if not pass_skip_confirm():
sys.exit(RC_GEN)
if argv_len == 1:
return (True, True, '', False, last_argv)
parser = argparse.ArgumentParser(description='migrator of harbor')
parser.add_argument('--db', action="store_true", dest='is_migrate_db', required=False, default=False, help='The flag to upgrade db.')
parser.add_argument('--cfg', action="store_true", dest='is_migrate_cfg', required=False, default=False, help='The flag to upgrede cfg.')
parser.add_argument('--version', action="store", dest='target_version', required=False, default='', help='The target version that the harbor will be migrated to.')
parser.add_argument('--output', action="store_true", dest='output', required=False, default=False, help='The path of the migrated harbor.cfg, if not set the input file will be overwritten.')
args = parser.parse_args(sys.argv[1:argv_len])
args.action = last_argv
return (args.is_migrate_db, args.is_migrate_cfg, args.target_version, args.output, args.action)
def init_from_input(self):
(self.is_migrate_db, self.is_migrate_cfg, self.target_version, self.output, self.action) = self.parse_input()
def run_cmd(cmd):
return os.system(cmd)
def pass_skip_confirm():
valid = {"yes": True, "y": True, "ye": True, "no": False, "n": False}
message = "Please backup before upgrade, \nEnter y to continue updating or n to abort: "
while True:
sys.stdout.write(message)
choice = raw_input().lower()
if choice == '':
return False
elif choice in valid:
return valid[choice]
else:
sys.stdout.write("Please respond with 'yes' or 'no' "
"(or 'y' or 'n').\n")
def main():
commandline_input = Parameters()
db_migrator = DBMigrator(commandline_input.target_version)
cfg_migrator = CfgMigrator(commandline_input.target_version, commandline_input.output)
try:
# test
if commandline_input.action == "test":
if commandline_input.is_migrate_db:
if not db_migrator.validate():
print ("Fail to validate: please make sure your DB auth is correct.")
sys.exit(RC_VALIDATE)
if commandline_input.is_migrate_cfg:
if not cfg_migrator.validate():
print ("Fail to validate: please make sure your cfg path is correct.")
sys.exit(RC_VALIDATE)
# backup
elif commandline_input.action == "backup":
if commandline_input.is_migrate_db:
if not db_migrator.backup():
sys.exit(RC_BACKUP)
if commandline_input.is_migrate_cfg:
if not cfg_migrator.backup():
sys.exit(RC_BACKUP)
# up
elif commandline_input.action == "up":
if commandline_input.is_migrate_db:
if not db_migrator.up():
sys.exit(RC_UP)
if commandline_input.is_migrate_cfg:
if not cfg_migrator.up():
sys.exit(RC_UP)
# restore
elif commandline_input.action == "restore":
if commandline_input.is_migrate_db:
if not db_migrator.restore():
sys.exit(RC_RESTORE)
if commandline_input.is_migrate_cfg:
if not cfg_migrator.restore():
sys.exit(RC_RESTORE)
else:
print ("Unknow action type: " + str(commandline_input.action))
sys.exit(RC_UNNKNOW_TYPE)
except Exception as ex:
print ("Migrator fail to execute, err: " + ex.message)
sys.exit(RC_GEN)
if __name__ == '__main__':
main()