Discovery of Redis server fails with the message: "Unable to connect to host: <hostname> port: <port number>"
1. Check Host and Port Accessibility
Ensure that the Redis host and port are accessible from the server where Applications Manager is installed. Make sure there are no network restrictions or firewall rules blocking access to the Redis server.
To verify connectivity, open a command prompt on the Applications Manager server and run:
telnet <Redis_hostname> <Redis_port_number>
Replace <Redis_Hostname> with the actual hostname or IP address of the Redis server, and <Redis_Port_Number> with the port number (e.g., telnet 192.168.1.100 6379).
- A blank screen indicates a successful connection.
- An error message means the connection failed.
2. Validate Redis Configuration
Navigate to the Redis server’s installation directory and review the redis.conf file:
- Ensure the port entry reflects the correct Redis TCP port (default: 6379).
- Check the bind directive:
- If it is set to a specific IP address, confirm that it matches the correct and accessible IP of the Redis server.
- If it is set to 0.0.0.0, it allows connections from all network interfaces (including remote hosts).
3. Authentication Settings
If the Redis server is running in authenticated mode, enable the Authentication Type setting, select the appropriate authentication method, and provide the required credentials.
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