您不能直接做到这一点，但是幸运的是，有一个名为ReJSON的新Redis模块可以完全满足您的需要，并且具有不错的Python绑定，出色地.您需要使用redis 4.0，然后编译并安装ReJSON并配置redis来加载它，并且它添加了用于JSON操作的本机命令.

它使您可以将JSON文档存储在redis中，然后获取或修改文档树中的特定元素，而无需检索(或在内部甚至解析)该文档.其Python客户端甚至可以让您存储python字典并将其自动转换为JSON.

ReJSON模块: http://rejson.io

Python客户端: https://pypi.python.org/pypi/rejson >

示例:

from rejson import Client, Path

rj = Client(host='localhost', port=6379)

# Set the key `obj` to some object
obj = {
    'answer': 42,
    'arr': [None, True, 3.14],
    'truth': {
        'coord': 'out there'
    }
}
rj.jsonset('obj', Path.rootPath(), obj)

# Get something
print 'Is there anybody... {}?'.format(
    rj.jsonget('obj', Path('.truth.coord'))
)

As i am new to redis, i need some guidance on how we can store the below complex json in REDIS so that we can access the Elements of the JSON from REDIS -

"Reservations": [
        {
            "Instances": [
                {
                    "Monitoring": {
                        "State": "disabled"
                    },
                    "PublicDnsName": "",
                    "State": {
                        "Code": 16,
                        "Name": "running"
                    },
                    "EbsOptimized": "false",
                    "LaunchTime": "xxxxxxxxx",
                    "PrivateIpAddress": "x.x.x.x",
                    "ProductCodes": [],
                    "VpcId": "xxxxx",
                    "StateTransitionReason": "",
                    "InstanceId": "i-xxxxxxx",
                    "EnaSupport": "true",
                    "ImageId": "ami-xxxxx",
                    "PrivateDnsName": "ip-xxxxxx.ec2.internal",
                    "KeyName": "xxxxxxv",
                    "SecurityGroups": [
                        {
                            "GroupName": "xxx",
                            "GroupId": "sg-xxxx"
                        },
                        {
                            "GroupName": "xxxxxx",
                            "GroupId": "sg-xxxxx"
                        },
                        {
                            "GroupName": "xxxxx",
                            "GroupId": "sg-xxxxxx"
                        },
                        {
                            "GroupName": "xxxxx",
                            "GroupId": "sg-xxxxxx"
                        }
                    ],
                    "ClientToken": "xxxxx",
                    "SubnetId": "subnet-xxxxx",
                    "InstanceType": "t2.micro",
                    "NetworkInterfaces": [
                        {
                            "Status": "in-use",
                            "MacAddress": "xxxxxxxx",
                            "SourceDestCheck": "true",
                            "VpcId": "vpc-xxxxx",
                            "Description": "",
                            "NetworkInterfaceId": "eni-xxxxx",
                            "PrivateIpAddresses": [
                                {
                                    "PrivateDnsName": "ip-xx-ec2.internal",
                                    "Primary": "true",
                                    "PrivateIpAddress": "xxxxx"
                                }
                            ],
                            "PrivateDnsName": "ip-xxxx-xx.ec2.internal",
                            "Attachment": {
                                "Status": "attached",
                                "DeviceIndex": 0,
                                "DeleteOnTermination": "true",
                                "AttachmentId": "eni-attach-xxxxx",
                                "AttachTime": "2017-0xxxxx"
                            },
                            "Groups": [
                                {
                                    "GroupName": "xx",
                                    "GroupId": "sg-xxxx"
                                },
                                {
                                    "GroupName": "xxxx",
                                    "GroupId": "sg-xxx"
                                },
                                {
                                    "GroupName": "xxxx",
                                    "GroupId": "sg-xxx"
                                },
                                {
                                    "GroupName": "xxxx",
                                    "GroupId": "sg-xxxx"
                                }
                            ],
                            "Ipv6Addresses": [],
                            "OwnerId": "xxx",
                            "SubnetId": "subnet-xxxx",
                            "PrivateIpAddress": "1xxxx"
                        }
                    ],
                    "SourceDestCheck": "true",
                    "Placement": {
                        "Tenancy": "default",
                        "GroupName": "",
                        "AvailabilityZone": "us-xxxxxxx"
                    },
                    "Hypervisor": "xen",
                    "BlockDeviceMappings": [
                        {
                            "DeviceName": "/dev/xxxxxx",
                            "Ebs": {
                                "Status": "attached",
                                "DeleteOnTermination": "true",
                                "VolumeId": "vol-xxxxxx",
                                "AttachTime": "2017-xxxxxxx"
                            }
                        }
                    ],
                    "Architecture": "x86_64",
                    "RootDeviceType": "ebs",
                    "IamInstanceProfile": {
                        "Id": "xxxxxxxx",
                        "Arn": "arn:aws:iam::xxxxxxx"
                    },
                    "RootDeviceName": "/dev/xxxxx",
                    "VirtualizationType": "hvm",
                    "Tags": [
                        {
                            "Value": "xxxxxx",
                            "Key": "aws:cloudformation:stack-name"
                        },
                        {
                            "Value": "xxxxxxx",
                            "Key": "aws:cloudformation:logical-id"
                        },
                        {
                            "Value": "arn:aws:cloudformation:xxxxxx",
                            "Key": "aws:cloudformation:stack-id"
                        }
                    ],
                    "AmiLaunchIndex": 0
                }
            ],
            "ReservationId": "r-xxxxx",
            "RequesterId": "xxxxx",
            "Groups": [],
            "OwnerId": "xxxxxx"
        }
    ] 
}

I need to store this in such a way that i query the IP/Hostname/InstanceID to get all the elements that are present in the JSON.

I need some guidance on the above.

You can't directly do that, but luckily there is a new Redis module called ReJSON that does exactly what you need, and it has a nice Python binding as well. You need to use redis 4.0, then compile and install ReJSON and configure redis to load it, and it adds native commands for JSON manipulation.

It lets you store JSON documents in redis, and then either fetch or modify a specific element in the document tree, without retrieving (or internally even parsing) the document. Its Python client even lets you store python dicts and converts them to JSON automatically.

ReJSON module: http://rejson.io

Python client: https://pypi.python.org/pypi/rejson

Example:

from rejson import Client, Path

rj = Client(host='localhost', port=6379)

# Set the key `obj` to some object
obj = {
    'answer': 42,
    'arr': [None, True, 3.14],
    'truth': {
        'coord': 'out there'
    }
}
rj.jsonset('obj', Path.rootPath(), obj)

# Get something
print 'Is there anybody... {}?'.format(
    rj.jsonget('obj', Path('.truth.coord'))
)