IP hash for session persistence in Nginx - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to enable IP hash load balancing in nginx.

Nginx

upstream backend {
    [1];
    server backend1.example.com;
    server backend2.example.com;
}

Drag options to blanks, or click blank then click option'

Around_robin

Bip_hash

Cleast_conn

Dhash

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'round_robin' which is the default but does not provide session persistence.

Using 'hash' which requires a key and is different from ip_hash.

The ip_hash directive enables session persistence by routing requests from the same client IP to the same backend server.

2fill in blank

medium

Complete the nginx server block to proxy requests to the IP hash upstream.

Nginx

server {
    listen 80;
    location / {
        proxy_pass http://[1];
    }
}

Drag options to blanks, or click blank then click option'

Abackend1

Bproxy

Cupstream1

Dbackend

Attempts:

3 left

💡 Hint

Common Mistakes

Using a server name instead of the upstream block name.

Using an undefined upstream name.

The proxy_pass directive should point to the name of the upstream block, which is backend in this case.

3fill in blank

hard

Fix the error in this nginx upstream block to correctly enable IP hash.

Nginx

upstream backend {
    [1];
    server backend1.example.com;
    server backend2.example.com;
}

Drag options to blanks, or click blank then click option'

Aip_hash

Bip_hashing

Ciphash

Dhash

Attempts:

3 left

💡 Hint

Common Mistakes

Adding 'on' after ip_hash which causes a syntax error.

Using incorrect directive names like 'iphash' or 'ip_hashing'.

The correct directive is ip_hash without any additional parameters like 'on'. It does not take 'on' or 'off'.

4fill in blank

hard

Fill both blanks to configure nginx to use IP hash and set a server with a specific port.

Nginx

upstream backend {
    [1];
    server backend1.example.com[2];
    server backend2.example.com;
}

Drag options to blanks, or click blank then click option'

Aip_hash

B:8080

C:80

Dleast_conn

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'least_conn' instead of 'ip_hash'.

Omitting the colon before the port number.

The ip_hash directive enables session persistence. The port :8080 specifies the backend server port.

5fill in blank

hard

Fill all three blanks to create a complete nginx configuration for IP hash session persistence with two backend servers on different ports.

Nginx

upstream backend {
    [1];
    server backend1.example.com[2];
    server backend2.example.com[3];
}

Drag options to blanks, or click blank then click option'

Aip_hash

B:8080

C:9090

Dleast_conn

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'least_conn' instead of 'ip_hash'.

Forgetting the colon before port numbers.

Using the same port for both servers.

This configuration uses ip_hash for session persistence. The two backend servers listen on ports 8080 and 9090 respectively.