Tair:Enable password-free access

Usage notes

• After you enable password-free access for your Tair instance, the default account is used to connect to the instance. The username of the default account is the same as the instance ID, such as r-bp1zxszhcgatnx****. The default account has read and write permissions on the instance.

• For security concerns, if you use a public endpoint to connect to your Tair instance after you enable password-free access for the instance, you still need to enter a password.

• By default, the #no_loose_check-whitelist-always parameter of your Tair instance is set to no. This way, after password-free access is enabled, clients in the same VPC can directly connect to the instance without the need to add the IP addresses of the clients to a whitelist of the instance.

  Note

  Cloud disk-based instances do not support the #no_loose_check-whitelist-always parameter. For more information, see Parameters that can be configured for Tair.

Procedure

1. Log on to the Tair console and go to the Instances page. In the top navigation bar, select the region in which the instance that you want to manage resides. Then, find the instance and click the instance ID.

2. In the upper-right corner of the Connection Information section, click Enable Password-free Access.

3. In the panel that appears, read the prompt and click OK.

   After you refresh the page, the Enable Password-free Access button changes to Disable Password-free Access. You can click this button to disable password-free access.

   Important

   If you disable password-free access for a Tair instance, connections that are established between the instance and your client by using this method fail.

   To prevent this impact on your client, you can change the method that is used to verify the connection of your client to account and password logon in advance.

Examples

The following code provides an example on how to connect to an instance that has password-free access enabled.

redis-cli -h host -p port
// Example: redis -h r-bp10noxlhcoim2****.redis.rds.aliyuncs.com -p 6379 

JedisPoolConfig config = new JedisPoolConfig();
// Specify the maximum number of idle connections based on your business needs. The value cannot exceed the maximum number of connections supported by the instance. 
config.setMaxIdle(100);
// Specify the maximum number of connections based on your business needs. The value cannot exceed the maximum number of connections supported by the instance. 
config.setMaxTotal(200);
config.setTestOnBorrow(false);
config.setTestOnReturn(false);
// Replace the values of the host and port parameters with the endpoint and port number of the instance. The password parameter is not required. 
String host = "r-bp10noxlhcoim2****.redis.rds.aliyuncs.com";
int port = 6379;
JedisPool pool = new JedisPool(config, host, port);
Jedis jedis = null;
try
{
    jedis = pool.getResource();
    /// ... do stuff here ... for example
    jedis.set("foo", "bar");
    System.out.println(jedis.get("foo"));
    jedis.zadd("sose", 0, "car");
    jedis.zadd("sose", 0, "bike");
    System.out.println(jedis.zrange("sose", 0, -1));
}
finally
{
    if(jedis != null)
    {
        // Close connections after each API operation is complete. To close a connection, release the connection to the connection pool instead of destroying the connection. 
        jedis.close();
    }
}
// Call this method only once when you exit. 
pool.destroy();

FAQ

• What do I do if the (error) ERR illegal address error is reported when I use a client to connect to the Tair instance that has password-free access enabled?

  Check whether the #no_loose_check-whitelist-always parameter is set to yes and whether the IP address of your client is added to a whitelist of the instance. To address this issue, add the IP address of your client to a whitelist of the instance or set the #no_loose_check-whitelist-always parameter to no.

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