LATEST VERSION: 1.3 - CHANGELOG
ClamAV Add-on for PCF v1.3

ClamAV Add-on for PCF

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This topic describes how to add ClamAV to your Pivotal Cloud Foundry (PCF) deployment.

About ClamAV Add-on for PCF

This add-on may be necessary for regulatory purposes if your compliance auditor requires antivirus protection within the PCF environment.

For example, auditors sometimes expect that antivirus protection is present in an environment that must comply with standards such as Payment Card Industry Data Security Standard (PCI DSS) or Health Insurance Portability and Accountability Act (HIPAA).

Prerequisites

To install ClamAV Add-on, you need the following things:

  • A PCF operator with admin rights. For more information, see Understanding Pivotal Cloud Foundry User Types.

  • Operations Manager (Ops Manager) v1.7 or later.

  • At least 1 GB of memory free on each VM before deploying ClamAV Add-on. ClamAV Add-on uses 610 MB of memory.

  • A local mirror to get ClamAV virus updates. For instructions on how to set up a local mirror, see Private Local Mirrors in the ClamAV documentation.

Create the ClamAV Manifest

The ClamAV manifest is a YML file that contains runtime config information for ClamAV Add-on. To create the ClamAV manifest for your deployment, follow the instructions below.

clamav.yml Template for Linux

Create a file named clamav.yml using the following code as a template.

releases:
- name: clamav
  version: x.x.x
addons:
- name: clamav
  jobs:
  - name: clamav
    release: clamav
    properties:
      clamav:
        database_mirror: 192.0.2.1
  include:
    stemcell:
    - os: ubuntu-trusty

clamav.yml Template for Windows

Create a file named clamav.yml using the following code as a template.

releases:
- name: clamav
  version: x.x.x
addons:
- name: clamav-windows
  jobs:
  - name: clamav-windows
    release: clamav
    properties:
      clamav:
        database_mirror: 192.0.2.1
  include:
    stemcell:
    - os: windows2012R2

General clamav.yml Template Configuration

  1. In the database_mirror field of the template, provide the hostname or IP address of a private ClamAV update mirror. Environments that cannot connect to the internet should use an update mirror. If you do not specify a value, ClamAV defaults to an S3-based mirror for updates. For compliance reasons, only use the S3-based mirror in non-production environments.

    For instructions on how to set up a local mirror, see Private Local Mirrors in the ClamAV documentation.

  2. (Optional) If you have to use a proxy server to connect to the internet, do the following:

    1. Add the proxy_host and proxy_port properties.
    2. If the proxy server needs authentication, add proxy_user and proxy_password properties.

      Replace the example text, indicated below in bold:
  releases:
  - name: clamav
      version: x.x.x
  addons:
    - name: clamav
      jobs:
       - name: clamav
          release: clamav
      properties:
        clamav:
          on_access: no
          scheduled: yes
          proxy_host: PROXY.LOCALDOMAIN
          proxy_port: 3128
          proxy_user: CLAMAV
          proxy_password: SECRET
  ...

Download and Deploy ClamAV Add-on

  1. Download ClamAV Add-on software binary from the Pivotal Network to your local machine.

  2. Copy the software binary to your Ops Manager virtual machine (VM).

    $ scp -i PATH/TO/PRIVATE/KEY clamav-release.tar.gz ubuntu@YOUR-OPS-MANAGER-VM-IP:

  3. Copy the ClamAV manifest, clamav.yml file, to your Ops Manager instance.

    $ scp -i PATH/TO/PRIVATE/KEY clamav.yml ubuntu@YOUR-OPS-MANAGER-VM-IP:

  4. SSH into Ops Manager.

    $ ssh -i PATH-TO-PRIVATE-KEY ubuntu@YOUR-OPS-MANAGER-VM-IP

  5. On the Ops Manager VM, navigate to the software binary location.

    $ cd PATH-TO-BINARY

If you are using PCF v1.11 or later, follow the BOSH CLI v2 procedures to deploy the ClamAV Add-on.

If you are using PCF v1.10 or earlier, follow the BOSH CLI v1 procedures to deploy the ClamAV Add-on.

Deploy the ClamAV Add-on with the BOSH CLI v2

  1. On the Ops Manager VM, create an alias in the BOSH CLI for your Ops Manager Director IP address. For example:
    $ bosh2 alias-env my-env -e 10.0.0.3
    
  2. Log in to the BOSH Director, specifying the newly created alias. For example:
    $ bosh2 -e my-env log-in
    
  3. Upload your release, specifying the path to the tarballed ClamAV binary. For example:
    $ bosh2 -e my-env upload-release clamav-release.tar.gz
    
  4. List the releases and confirm that ClamAV appears. For example:
    $ bosh2 -e my-env releases
    
  5. Update your runtime configuration to include ClamAV, specifying the path to the clamav.yml file you created above. For example:

    Note: If you installed other BOSH add-ons, you must merge the ClamAV manifest into your existing add-on manifest. Append the contents of clamav.yml to your existing add-on YML file.

    $ bosh2 -e my-env update-runtime-config clamav.yml
  6. Verify that your runtime configuration changes match what you specified in the ClamAV manifest. For example:
    $ bosh2 -my-env runtime-config
    Acting as user 'admin' on 'micro'
    releases:
    - name: clamav
        version: 1.0.0
    
    addons: name: clamav jobs: - name: clamav release: clamav ...
  7. Navigate to your Installation Dashboard in Ops Manager.
  8. Click Apply Changes.

Deploy the ClamAV Add-on with the BOSH CLI v1

  1. On the Ops Manager VM, target your BOSH director instance.

    $ bosh target YOUR-OPS-MANAGER-DIRECTOR-IP
    Target set to 'Ops Manager'
    Your username: director
    Enter password: ******************
    Logged in as 'director'
    

  2. Upload your release.

    $ bosh upload release PATH-TO-BINARY/BINARY-NAME.tar

  3. From the command line, confirm that the upload of the ClamAV software binary completed. You should see the ClamAV release.

    $ bosh releases

  4. Update your runtime configuration to include ClamAV.

    Note: If you installed other BOSH add-ons, you must merge the ClamAV manifest into your existing add-on manifest. Append the contents of clamav.yml to your existing add-on YML file.

    $ bosh update runtime-config PATH/YOUR-ADD-ON-YML.yml
  5. Verify your runtime configuration changes match what you specified in the ClamAV manifest. These changes appear differently on Linux and Windows hosts.

    $ bosh runtime-config
    Acting as user 'admin' on 'micro'
    releases:
    - name: clamav
      version: 1.0.0
    
    addons: name: clamav jobs: - name: clamav release: clamav ...

Configure Forwarding for ClamAV Alerts

The ClamAV BOSH release writes all alerts to the syslogs of the VMs in your deployment. You can use syslog forwarding to forward the alerts to a syslog aggregator.

Follow the steps to Configure System Logging in the Elastic Runtime tile. The syslog aggregator that you specify receives all alerts generated on Elastic Runtime VMs, including the ClamAV alerts.

Note: When you configure syslog forwarding, ensure there is enough disk space for the logs. Make sure that log rotation is frequent enough. If in doubt, rotate the logs hourly or when they reach a certain size. Pivotal recommends forwarding logs to a remote syslog aggregation system.

Verify Your ClamAV Add-on Installation

  1. BOSH SSH into one of the VMs in your deployment. If you are using PCF v1.11 or later, use the BOSH CLI v1. If you are using PCF v1.10 or earlier, use the BOSH CLI v2.
  2. Run monit summary. Look for the following processes in the output:
    The Monit daemon 5.2.4 uptime: 3d 0h 56m
    Process 'clamd'                     running
    Process 'freshclam' running
  3. If monit summary does not list clamd and freshclamd, do the following:
    1. Try to start the ClamAV processes by running the following commands:
        $ monit start clamd
      $ monit start freshclam
    2. Run monit summary again. If you do not see the processes mentioned above, check /var/vcap/sys/log/clamav logs for errors.
  4. If monit summary does list freshclamd and clamd, create a file in /var/vcap on the VM with the following contents:
    X5O!P%@AP[4\PZX54(P^)7CC)7}$EICAR-STANDARD-ANTIVIRUS-TEST-FILE!$H+H*
    
    This is a virus signature used to test anti-virus software.
  5. After clamdscan completes, a notification should appear in /var/log/messages. This scan can take up to an hour.

ClamAV Log Format

ClamAV log format is unstructured. If a virus is detected, the following text is sent to syslog:

Jul 11 17:36:35 k2lam76scmb clamd[3022]: SelfCheck: Database status OK
Jul 11 17:42:34 k2lam76scmb clamd[3022]: /bin/infected-file: Eicar-Test-Signature FOUND

A generalized format for the logline is:

clamd[PID]: INFECTED-FILE-PATH: VIRUS-NAME FOUND

Enable On-Access Scan

Note: On-Access Scan is not supported on Windows.

ClamAV offers immediate file scanning upon file modification. This feature may reduce the time it takes to detect and report malware.

Enable the feature with the on_access runtime config property:

  1. In the clamav.yml file, add the on_access property under the clamav property, set on_access to yes, shown in bold:
    
      releases:
      - name: clamav
          version: x.x.x
      
    addons: name: clamav jobs: - name: clamav release: clamav properties: clamav: on_access: yes scheduled: yes ...
  2. Apply changes by updating your runtime config as described in Download and Deploy ClamAV Add-on.

Disable Scheduled Scan

By default, ClamAV runs a virus scan every hour. The scan frequency is not configurable, but you can disable the scan completely if necessary.

To disable the scheduled scan, do the following:

  1. In the clamav.yml file, set the property scheduled to no.
  2. Apply changes by updating your runtime config as described in Download and Deploy ClamAV Add-on.

Choose the Action on Infected Files

You can configure ClamAV to take action when infected files are found. By default, a notification is sent to the syslog when an infected file is found. However, you can specify other actions, as described in step 2 below.

  1. In the clamav.yml file, add the action property under the clamav property and, optionally, the action_destination property, shown in bold:

    releases:
    - name: clamav
        version: x.x.x
    
    addons:
      name: clamav
        jobs:
          - name: clamav
            release: clamav
        properties:
          clamav:
            action: <strong>ACTION</strong>
            action_destination: <strong>PATH</strong>
    ...
    
  2. Replace ACTION with one of the following values:

    • notify: The default, only send a notification to syslog
    • remove: Delete the infected file from the filesystem
    • move: Move the infected file to the directory location specified by action_destination
    • copy: Copy the infected file to the directory location specified by action_destination

    If you don’t supply an action, the function fails.

  3. Replace PATH with the directory location where you want the infected files moved or copied to. The system does not scan the moved-to or copied-to location. If the directory path is not valid, the function fails.

    Example configuration:

    releases:
    - name: clamav
        version: x.x.x
    
    addons:
      name: clamav
        jobs:
          - name: clamav
            release: clamav
        properties:
          clamav:
            action: move
            action_destination: /var/vcap/data/clamav/found
      ...
    
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