1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
import redis
from django.conf import settings
from django.core.management import BaseCommand
class Command(BaseCommand):
def add_arguments(self, parser):
parser.add_argument('-t', '--test', action='store_true',
help="Run test for redis migrate, a redis server should run on localhost:6379")
parser.add_argument('-m', '--migrate', action='store_true', help="Redis data migrate")
def handle(self, *args, **options):
"""
redis migrate.
:param args:
:param options:
:return:
"""
if options['test']:
self.migrate_test_v2(settings.REDIS_MIGRATE)
elif options['migrate']:
for rd in settings.REDIS_MIGRATE:
for prefix in rd['prefix']:
self.migrate_v2(rd['source'], rd['target'], prefix=prefix)
@staticmethod
def migrate_template(**kwargs):
"""
See redis MIGRATE command.
"""
return "MIGRATE {dst_host} {dst_port} {key} {dst_db} {timeout} COPY KEYS {keys}".format(**kwargs)
def migrate_v3(self, source, target, prefix=""):
"""
适用于: redis >= 3.0.8
:param source:
:param target:
:param prefix:
:return:
"""
self.stdout.write(self.style.SUCCESS(
"Start to migrate from %s to %s, prefix: %s" % (
"redis://" + source['host'] + ":" + str(source['port']) + "/" + str(source['db']),
"redis://" + target['host'] + ":" + str(target['port']) + "/" + str(target['db']),
prefix
)
))
rd = redis.StrictRedis(**source)
target_rd = redis.StrictRedis(**target)
for key in target_rd.keys(prefix + "*"):
target_rd.delete(key.decode())
binary_keys = rd.keys(prefix + "*")
keys = ' '.join(key.decode() for key in binary_keys)
command = self.migrate_template(
dst_host=target['host'], dst_port=target['port'], dst_db=target['db'], key='', keys=keys, timeout=5000,
)
r = rd.execute_command(command)
if r.decode() == 'OK':
self.stdout.write(self.style.SUCCESS("Migrate success."))
else:
self.stdout.write(self.style.ERROR("Migrate failed: %s" % r))
def migrate_v2(self, source, target, prefix=""):
"""
适用于：redis >= 2.6
:param source:
:param target:
:param prefix:
:return:
"""
self.stdout.write(self.style.SUCCESS(
"Start to migrate from %s to %s, prefix: %s" % (
"redis://" + source['host'] + ":" + str(source['port']) + "/" + str(source['db']),
"redis://" + target['host'] + ":" + str(target['port']) + "/" + str(target['db']),
prefix
)
))
src_rd = redis.StrictRedis(**source)
dst_rd = redis.StrictRedis(**target)
total = len(src_rd.keys(prefix + "*"))
for key in src_rd.keys(prefix + "*"):
try:
""" redis> SET """
v = src_rd.get(key)
dst_rd.set(key, v)
except redis.exceptions.ResponseError:
""" redis> HSET """
try:
v = src_rd.hgetall(key)
dst_rd.hmset(key, v)
except redis.exceptions.ResponseError:
"""redis> ZADD """
zv = src_rd.zrange(key, 0, -1, withscores=True)
v = {key.decode(): value for key, value in zv}
dst_rd.zadd(key, **v)
self.stdout.write(self.style.SUCCESS("Migrate success: %s key." % total))
def migrate_test_v3(self, redis_migrate):
prefix = 'key_for_migrate_testing:'
for conf in redis_migrate:
rd1, rd2 = conf['source'], conf['target']
rd = redis.StrictRedis(**rd1)
for i in range(100):
rd.set(prefix + str(i), i)
assert len(rd.keys("key_for_migrate_testing:*")) == 100
self.migrate_v3(rd1, rd2, prefix=prefix)
assert len(rd.keys(prefix + "*")) == 100
for k in rd.keys(prefix + "*"):
rd.delete(k.decode())
assert len(rd.keys(prefix + "*")) == 0
rd = redis.StrictRedis(**rd2)
assert len(rd.keys(prefix + "*")) == 100
for k in rd.keys(prefix + "*"):
rd.delete(k.decode())
assert len(rd.keys(prefix + "*")) == 0
def migrate_test_v2(self, redis_migrate):
prefix = 'key_for_migrate_testing:'
for conf in redis_migrate:
rd1, rd2 = conf['source'], conf['target']
src_rd = redis.StrictRedis(**rd1)
dst_rd = redis.StrictRedis(**rd2)
for key in src_rd.keys(prefix+"*"):
src_rd.delete(key)
for key in dst_rd.keys(prefix+"*"):
dst_rd.delete(key)
src_rd.set(prefix + "SET", 1)
src_rd.hmset(prefix + "HMSET", {'a': 1, 'b': 1})
src_rd.zadd(prefix + "ZADD", **{'a': 1, 'b': 2})
assert len(src_rd.keys(prefix+"*")) == 3
self.migrate_v2(rd1, rd2, prefix=prefix)
assert len(dst_rd.keys(prefix+"*")) == 3
assert dst_rd.get(prefix + "SET") == src_rd.get(prefix + "SET")
assert dst_rd.hgetall(prefix + "HMSET") == src_rd.hgetall(prefix + "HMSET")
assert dst_rd.zrange(prefix + "ZADD", 0, -1, withscores=True) == src_rd.zrange(prefix + "ZADD", 0, -1, withscores=True)
for key in ("SET", "HMSET", "ZADD"):
src_rd.delete(prefix + key)
dst_rd.delete(prefix + key)
assert len(src_rd.keys(prefix + "*")) == 0
assert len(dst_rd.keys(prefix + "*")) == 0