Connecting to a Cache Cluster Running in an Amazon VPC - Amazon ElastiCache for Redis

Connecting to a Cache Cluster Running in an Amazon VPC

This example shows how to launch an Amazon EC2 instance in your Amazon VPC. You can then log in to this instance and access the ElastiCache cluster that is running in the Amazon VPC.

Connecting to a Cache Cluster Running in an Amazon VPC (Console)

In this example, you create an Amazon EC2 instance in your Amazon VPC. You can use this Amazon EC2 instance to connect to cache nodes running in the Amazon VPC.

Note

For information about using Amazon EC2, see the Amazon EC2 Getting Started Guide in the Amazon EC2 documentation.

To create an Amazon EC2 instance in your Amazon VPC using the Amazon EC2 console

  1. Sign in to the AWS Management Console and open the Amazon EC2 console at https://console.aws.amazon.com/ec2/.

  2. In the console, choose Launch Instance and follow these steps:

  3. On the Choose an Amazon Machine Image (AMI) page, choose the 64-bit Amazon Linux AMI, and then choose Select.

  4. On the Choose an Instance Type page, choose 3. Configure Instance.

  5. On the Configure Instance Details page, make the following selections:

    1. In the Network list, choose your Amazon VPC.

    2. In the Subnet list, choose your public subnet.

    When the settings are as you want them, choose 4. Add Storage.

  6. On the Add Storage page, choose 5. Tag Instance.

  7. On the Tag Instance page, type a name for your Amazon EC2 instance, and then choose 6. Configure Security Group.

  8. On the Configure Security Group page, choose Select an existing security group. For more information on security groups, see Amazon EC2 security groups for Linux instances.

    Choose the name of your Amazon VPC security group, and then choose Review and Launch.

  9. On the Review Instance and Launch page, choose Launch.

  10. In the Selct an existing key pair or create a new key pair window, specify a key pair that you want to use with this instance.

    Note

    For information about managing key pairs, see the Amazon EC2 Getting Started Guide.

  11. When you are ready to launch your Amazon EC2 instance, choose Launch.

You can now assign an Elastic IP address to the Amazon EC2 instance that you just created. You need to use this IP address to connect to the Amazon EC2 instance.

To assign an Elastic IP address (Console)

  1. Open the Amazon VPC console at https://console.aws.amazon.com/vpc/.

  2. In the navigation list, choose Elastic IPs.

  3. Choose Allocate Elastic IP address.

  4. In the Allocate Elastic IP address dialog box, accept the default Network Border Group and choose Allocate .

  5. Choose the Elastic IP address that you just allocated from the list and choose Associate Address.

  6. In the Associate Address dialog box, in the Instance box, choose the ID of the Amazon EC2 instance that you launched.

    In the Private IP address box, select the box to obtain the private IP address and then choose Associate.

    You can now use SSH to connect to the Amazon EC2 instance using the Elastic IP address that you created.

To connect to your Amazon EC2 instance

  • Open a command window. At the command prompt, issue the following command, replacing mykeypair.pem with the name of your key pair file and 54.207.55.251 with your Elastic IP address.

    ssh -i mykeypair.pem ec2-user@54.207.55.251
    Important

    Do not log out of your Amazon EC2 instance yet.

You are now ready to interact with your ElastiCache cluster. Before you can do that, if you haven't already done so, you need to install the telnet utility.

To install telnet and interact with your cache cluster (AWS CLI)

  1. Open a command window. At the command prompt, issue the following command. At the confirmation prompt, type y.

    sudo yum install telnet Loaded plugins: priorities, security, update-motd, upgrade-helper Setting up Install Process Resolving Dependencies --> Running transaction check ...(output omitted)... Total download size: 63 k Installed size: 109 k Is this ok [y/N]: y Downloading Packages: telnet-0.17-47.7.amzn1.x86_64.rpm | 63 kB 00:00 ...(output omitted)... Complete!
  2. Go to the ElastiCache console at https://console.aws.amazon.com/elasticache/ and obtain the endpoint for one of the nodes in your cache cluster. For more information, see Finding Connection Endpoints for Redis or Finding Connection Endpoints for Memcached.

  3. Use telnet to connect to your cache node endpoint over port 11211. Replace the hostname shown below with the hostname of your cache node.

    telnet my-cache-cluster.7wufxa.0001.use1.cache.amazonaws.com 11211

    You are now connected to the cache engine and can issue commands. In this example, you add a data item to the cache and then get it immediately afterward. Finally, you'll disconnect from the cache node.

    To store a key and a value, type the following two lines:

    add mykey 0 3600 28 This is the value for my key

    The cache engine responds with the following:

    STORED

    To retrieve the value for mykey, type the following:

    get mykey

    The cache engine responds with the following:

    VALUE mykey 0 28 This is the value for my key END

    To disconnect from the cache engine, type the following:

    quit
Important

To avoid incurring additional charges on your AWS account, be sure to delete any AWS resources you no longer want after trying these examples.