Least connections in Nginx - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to set the load balancing method to least connections in NGINX.

Nginx

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

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

Aleast_conn

Bproxy_pass

Clisten

Dserver

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'proxy_pass' instead of 'least_conn' inside the upstream block.

Placing 'least_conn' outside the upstream block.

The least_conn directive sets the load balancing method in an upstream block. Using least_conn; tells NGINX to use the least connections method.

2fill in blank

medium

Complete the code to enable least connections load balancing with a parameter to control the maximum number of connections.

Nginx

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

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

Amax_conns=5

Bmax_fails=3

Cweight=2

Dfail_timeout=10s

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing max_fails with connection limits.

Using weight which is for weighted load balancing.

The max_conns parameter limits the maximum simultaneous connections to a server when using least connections load balancing.

3fill in blank

hard

Fix the error in the upstream block to correctly use least connections load balancing.

Nginx

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

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

Aproxy_pass

Blisten

Cleast_conn

Dserver

Attempts:

3 left

💡 Hint

Common Mistakes

Misspelling the 'least_conn' directive.

Using directives not valid inside upstream blocks.

The directive balanc is a typo. The correct directive is least_conn to set the load balancing method.

4fill in blank

hard

Fill both blanks to configure an upstream block using least connections with max connections limit and a server with weight.

Nginx

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

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

Amax_conns=10

Bweight=3

Cmax_fails=2

Dfail_timeout=5s

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up max_fails and max_conns.

Placing weight outside the server directive.

Use max_conns=10 to limit connections and weight=3 to assign server weight.

5fill in blank

hard

Fill all three blanks to create an upstream block with least connections, max connections limit, and two servers with weights.

Nginx

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

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

Amax_conns=15

Bweight=4

Cweight=2

Dmax_fails=3

Attempts:

3 left

💡 Hint

Common Mistakes

Using max_fails instead of max_conns for connection limits.

Assigning weights outside server lines.

The max_conns=15 limits connections, and the servers have weights 4 and 2 respectively.