Deploying on Google Cloud Platform (GCP)

To deploy Wallarm Node on Google Cloud Platform:

1. Log in to your Google Cloud Platform account.
2. Launch a Wallarm Node instance.
3. Connect to the Wallarm Node instance console for the further configuration.
4. Set up the filter node for using a proxy server.
5. Register Wallarm Node in Wallarm Cloud.
6. Set up filtering and proxying rules.
7. Allocate more memory for the Wallarm Node.
8. Restart NGINX.

1. Log in to Your Google Cloud Platform Account

Sign in at console.cloud.google.com.

2. Launch a Wallarm Node Instance

Launch your Wallarm Node instance using this link and click LAUNCH ON COMPUTER ENGINE.

The GCP instance launches with a pre-installed Wallarm Node.

3. Connect to the Wallarm Node Instance Console for the Further Configuration

See Google Cloud Platform: Connecting to Instances for more details.

4. Set up the Filter Node for Using a Proxy Server

You need to assign new values to the environment variables, which define the proxy server used, to configure Wallarm node for using your proxy server.

Add the following exports of the new values of the environment variables to the /etc/environment file:

• Add export https_proxy to define a proxy for the https protocol.
• Add export http_proxy to define a proxy for the http protocol.
• Add export no_proxy to define the list of the resources proxy should not be used for.

Assign the <scheme>://<proxy_user>:<proxy_pass>@<host>:<port> string values to the https_proxy and http_proxy variables.

• <scheme> defines the protocol used. It should match the protocol that the current environment variable sets up proxy for.
• <proxy_user> defines the username for proxy authorization.
• <proxy_pass> defines the password for proxy authorization.
• <host> defines a host of the proxy server.
• <port> defines a port of the proxy server.

Assign a "<res_1>, <res_2>, <res_3>, <res_4>, ..." array value, where <res_1>, <res_2>, <res_3>, and <res_4> are the IP addresses and/or domains, to the no_proxy variable to define a list of the resources which proxy should not be used for. This array should consist of IP addresses and/or domains.

The example of the correct /etc/environment file contents below demonstrates the following configuration:

• The https and http protocols use the 1.2.3.4 host and the 1234 port for request proxying.
• The https and http protocols use the admin username and the 01234 password for proxy authorization.
• Proxying is disabled for the requests sent to 127.0.0.1, 127.0.0.8, 127.0.0.9, and localhost.

export https_proxy=http://admin:01234@1.2.3.4:1234
export http_proxy=http://admin:01234@1.2.3.4:1234
export no_proxy="127.0.0.1, 127.0.0.8, 127.0.0.9, localhost"

5. Register Wallarm Node in Wallarm Cloud

The filter node interacts with the Wallarm cloud located on a remote server.

The addnode script connects the filter node to the Wallarm cloud.

1. Run the script addnode:

   You have to pick the script to run depending on the Cloud you are using.

   • If you are using https://my.wallarm.com/, run the script from the «EU Cloud» tab below.
   • If you are using https://us1.my.wallarm.com/, run the script from the «US Cloud» tab below.
   EU Cloud

   US Cloud

   sudo /usr/share/wallarm-common/addnode

   sudo /usr/share/wallarm-common/addnode -H us1.api.wallarm.com

2. Enter the login and password. This is the same login and password that you use to access Wallarm console at https://my.wallarm.com or https://us1.my.wallarm.com/. The profile must have the Administrator role and 2FA should be disabled. If the profile has the Analyst role or has 2FA enabled, the script will error out.

6. Set up Filtering and Proxying Rules

The etc/nginx/conf.d directory contains NGINX and Wallarm filter node configuration files.

By default, this directory contains the following configuration files:

• The default.conf file defines the configuration of NGINX.
• The wallarm.conf file defines the global configuration of Wallarm filter node.
• The wallarm-status.conf file defines the Wallarm monitoring configuration.

You can create your own configuration files to define the operation of NGINX and Wallarm. It is recommended to create a separate configuration file with the server block for each group of the domains that should be processed in the same way.

To see detailed information about working with NGINX configuration files, proceed to the official NGINX documentation.

Wallarm directives define the operation logic of the Wallarm filter node. To see the list of Wallarm directives available, proceed to the Wallarm configuration options page.

A Configuration File Example

Let us suppose that you need to configure the server to work in the following conditions:

• Only HTTP traffic is processed. There are no HTTPS requests processed.
• The following domains receive the requests: example.com and www.example.com.
• All requests must be passed to the server 10.80.0.5.
• All incoming requests are considered less than 1MB in size (default setting).
• The processing of a request takes no more than 60 seconds (default setting).
• Wallarm must operate in the monitor mode.
• Clients access the filter node directly, without an intermediate HTTP load balancer.

To meet the listed conditions, the contents of the configuration file must be the following:

    server {
      listen 80;
      listen [::]:80 ipv6only=on;

      # the domains for which traffic is processed
      server_name example.com; 
      server_name www.example.com;

      # turn on the monitoring mode of traffic processing
      wallarm_mode monitoring; 
      # wallarm_instance 1;

      location / {
        # setting the address for request forwarding
        proxy_pass http://10.80.0.5; 
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
      }
    }

7. Allocate More Memory for the Wallarm Node

Wallarm Node uses Tarantool, open-source in-memory database, to calculate traffic metrics required for automated adjusting of security rules.

By default, the amount of RAM allocated to Tarantool is 75% of the total instance memory.

You can change the amount of RAM allocated to in-memory database:

1. Open the Tarantool configuration file:

   vi /etc/default/wallarm-tarantool

2. Set the amount of allocated RAM (in GB) using the SLAB_ALLOC_ARENA variable. For example, to set 24 GB:

   SLAB_ALLOC_ARENA=24

3. To apply changes, restart the Tarantool daemon:

   systemctl restart wallarm-tarantool

8. Restart NGINX

Restart NGINX by running the following command:

systemctl restart nginx

The Installation Is Complete

Check that the filter node runs and filters the traffic. See Check the filter node operation.