strictRedis对象方法用于连接redis

指定主机地址，port与服务器连接，默认db是0，redis默认数据库有16个，在配置文件中指定database 16

上代码

1、对redis的单实例进行连接操作

根据不同的实例方法，与redis的命令对应

python3>>>importredis>>>r = redis.StrictRedis(host='localhost', port=6379, db=0,password='root')>>>r.set('lufei', 'guojialei')

True>>>r.get('lufei')'bar'增删改查>>> conn=redis.StrictRedis()>>>

>>>

>>> conn.set("name1","alex1")

True>>> conn.set("name2","wupeiqi")

True>>>

>>>

>>> conn.set("name1","alex666")

True>>> conn.delete("name2","name1")>>>conn.keys()

[b'name3', b'name2', b'name1']--------------------

2、sentinel集群连接并操作

[root@db01~]#redis-server /data/6380/redis.conf

[root@db01 ~]#redis-server /data/6381/redis.conf

[root@db01 ~]#redis-server /data/6382/redis.conf

[root@db01 ~]#redis-sentinel /data/26380/sentinel.conf &

--------------------------------

## 导入redis sentinel包

>>> from redis.sentinel importSentinel##指定sentinel的地址和端口号

>>> sentinel = Sentinel([('localhost', 26380)], socket_timeout=0.1)##测试，获取以下主库和从库的信息

>>> sentinel.discover_master('mymaster')>>> sentinel.discover_slaves('mymaster')##配置读写分离#写节点

>>> master = sentinel.master_for('mymaster', socket_timeout=0.1)#读节点

>>> slave = sentinel.slave_for('mymaster', socket_timeout=0.1)###读写分离测试 key

>>> master.set('oldboy', '123')>>> slave.get('oldboy')'123'

----------------------redis cluster的连接并操作(python2.7.2以上版本才支持redis cluster，我们选择的是3.5)

https://github.com/Grokzen/redis-py-cluster3、python连接rediscluster集群测试

使用

python3>>> from rediscluster importStrictRedisCluster>>> startup_nodes = [{"host": "127.0.0.1", "port": "7000"}]### Note: decode_responses must be set to True when used with python3

>>> rc = StrictRedisCluster(startup_nodes=startup_nodes, decode_responses=True)>>> rc.set("foo", "bar")

True>>>

'bar'

----------------------

redis存储session

安装模块

安装模块

pip3 install django-redis-sessions

或者

pip3 install django-redis

本文这里用的是django 2.0语法，创建django项目

django-admin startproject mydjango

修改settings.py文件

写入

CACHES ={"default": {"BACKEND": "django_redis.cache.RedisCache","LOCATION": "redis://127.0.0.1:6379/0","OPTIONS": {"CLIENT_CLASS": "django_redis.client.DefaultClient","PASSWORD": "",#"PARSER_CLASS": "redis.connection.HiredisParser",#"SOCKET_TIMEOUT": 10,#"CONNECTION_POOL_CLASS_KWARGS": {#"max_connections": 2,#}

}

}

}#SESSION_COOKIE_AGE = 30 * 60 #设置session过期时间为30分钟

SESSION_ENGINE = 'django.contrib.sessions.backends.cache'

创建app01

django-admin startapp app01

编写session视图函数 app01.views

from django.shortcuts importrender,HttpResponsedefset_session(request):

request.session['username']='chaoge'request.session['age']=18

return HttpResponse("设置sesson成功")defget_session(request):

username=request.session['username']

age= request.session['age']return HttpResponse(username+":"+str(age))

添加url路由

vim mydjango/urls.py

from django.contrib importadminfrom django.urls importpathfrom app01 importviews

urlpatterns=[

path('set_session/',views.set_session),

path('get_session/',views.get_session),

path('admin/', admin.site.urls),

]

确保启动redis服务端，默认方式启动

redis-server &redis-cli 连接无误

发送ping命令得到pong即可

启动django

python3 manage.py runserver 0.0.0.0:8000

访问视图，设置一条session信息，存入redis数据库

访问视图，获取session信息

检查redis数据库，是否存在一条key

127.0.0.1:6379> keys *

1) ":1:django.contrib.sessions.cachep220moqvxclz2hyjqmbybqs3v8ck2i39"获取这个key的值127.0.0.1:6379> get :1:django.contrib.sessions.cachep220moqvxclz2hyjqmbybqs3v8ck2i39"\x80\x04\x95!\x00\x00\x00\x00\x00\x00\x00}\x94(\x8c\busername\x94\x8c\x06chaoge\x94\x8c\x03age\x94K\x12u."