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Documentation | 2025.2

# Upgrading a RHEL package installation

The section describes how to upgrade a P4 Code Review RHEL package installation to a newer release.

- P4 Code Review runtime dependencies change between releases, you must check that your system satisfies the P4 Code Review runtime dependencies before starting the upgrade, see Runtime dependencies.

- Review the PHP requirements before you upgrade P4 Code Review, see PHP.

  P4 Code Review no longer supports PHP 8.0 version.

- Review the P4 Server requirements before you upgrade P4 Code Review, see P4 Server requirements.
- P4 Server 2020.1 and later, permissions have changed for viewing and editing stream spec files in P4 Code Review. To view and edit stream spec files in P4 Code Review, the P4 Code Review user must have admin permissions for the entire depot //...

- If you are upgrading from P4 Code Review 2017.2 or earlier, run the P4 Code Review index upgrade after you have validated your upgrade. This is the last step of the upgrade and ensures that the review activity history is displayed in the correct order on the Dashboard, and Reviews list pages.

- If you are upgrading from P4 Code Review 2020.2 or earlier and have userids that contain the forward slash (/) character, add AllowEncodedSlashes NoDecode to the VirtualHost block of your /etc/apache2/sites-enabled/perforce-swarm-site.conf file. For more information about the VirtualHost block, see Apache configuration.

## Upgrade P4 Code Review

The following notes are applicable for RHEL 8 and RHEL 9:

- As part of the PHP upgrade process your Apache 2.2 server will be stopped and disabled, if you are currently using the Apache 2.2 server for any other applications they will stop working. You will either need to upgrade these applications to work with PHP 8 and Apache 2.4 or move them to another server.

- P4 Code Review 2020.2 and later: these versions of P4 Code Review uses the Remi repository for RHEL 8 and RHEL 9. This provides PHP 8.x installed in the standard file system structure. This means that the old httpd24-httpd version of Apache is no longer needed, and the standard system version of Apache is being used again.

  The SCL Apache site configuration file was installed at this location for P4 Code Review 2019.1 to 2020.1:

  /opt/rh/httpd24/root/etc/httpd/conf.d/perforce-swarm-site.conf

  If this exists when P4 Code Review is upgraded to 2020.2 and later, this file is copied to /etc/httpd/conf.d/perforce-swarm-site.conf if there is no file at the destination. It is also re-written to change references from /var/log/httpd24 to /var/log/httpd

  If a site configuration file for P4 Code Review already exists in /etc/httpd, the copy and re-write is not performed.

  After upgrade, httpd24-httpd is disabled.

- To avoid seeing the Apache HTTP server Linux test page when you start the Apache server, comment out the content of the welcome.conf file located in the /etc/httpd/conf.d/ directory.

- To avoid loading the Apache HTTP server example configuration instead of the P4 Code Review configuration when the Apache server starts, rename the autoindex.conf file located in the /etc/httpd/conf.d/ directory to z-autoindex.conf or similar. This is required because Apache runs the first conf file it finds in the /etc/httpd/conf.d/ directory (alphabetical order) and that must be the perforce-swarm-site.conf file.

From P4 Code Review 2021.1, the P4 Code Review package upgrade installs logrotate to manage your P4 Code Review log rotation. If the package upgrade finds an existing custom logrotate configuration file for P4 Code Review, the upgrade will notify you and give you details on how to disable the new logrotate configuration.

For information about the logrotate configuration, see Logrotate.

The following process attempts to minimize downtime, but a short period of downtime for P4 Code Review users is unavoidable. There should be no downtime for your P4 Server. After a successful upgrade, all P4 Code Review users are logged out.

If you are using P4 Code Review in a production environment, we encourage you to test this upgrade process in a non-production environment first.

1. Install the main P4 Code Review package on the server to host P4 Code Review.

   Follow the instructions for your OS distribution, see RHEL 8 or RHEL 9 below:

   - RHEL 8 (run these commands as root):

     The full PHP and Apache upgrade process described below is only required the first time you upgrade to PHP 8.x. For future P4 Code Review upgrades just run the P4 Code Review upgrade steps, the ImageMagick steps if you want to install ImageMagick, and check that SELinux is working correctly.

     The upgrade process will deploy epel-release-latest-8.noarch.rpm to give P4 Code Review access to the EPEL repository, deploy remi-release-8.rpm to give P4 Code Review access to PHP 8.x and Apache 2.4, upgrade P4 Code Review, stop and disable the Apache 2.2 server, copy and edit some P4 Code Review files so they work with Apache 2.4, and finally start and enable the Apache 2.4 server.

     1. Deploy the epel-release-latest-8.noarch.rpm repository configuration package to give P4 Code Review access to EPEL packages:

     dnf install https://dl.fedoraproject.org/pub/epel/epel-release-latest-8.noarch.rpm

     2. Deploy the Remi repository configuration package to give P4 Code Review access to PHP 8.x (only required the first time you upgrade to PHP 8.x):

     dnf install https://rpms.remirepo.net/enterprise/remi-release-8.rpm

     If you don't deploy the Remi repository, you will see dependency errors when you do the next steps.

     3. Install the yum-utils package to give access to the yum-config-manager command:

     dnf install yum-utils

     4. Enable the optional channel for some dependencies:

     subscription-manager repos --enable=rhel-8-server-optional-rpms

     5. Install the Default/Single version of PHP:
        1. Enable the module stream for PHP 8.3:

        dnf module reset php

        2. Install PHP 8.3:

        dnf module install -y php:remi-8.3

        3. Run an upgrade for PHP, this will also upgrade the P4 Code Review packages:

        dnf update

     6. If you didn't run dnf update in the previous step, run the P4 Code Review package upgrade now:

     yum install helix-swarm helix-swarm-triggers helix-swarm-optional

     If you are upgrading from P4 Code Review 2019.3 to P4 Code Review 2021.1 or later, remove the P4 Code Review PHP 7.1 files:

     yum remove $(yum list installed | grep php71 | awk '{print $1}')

     7. If you are upgrading from Apache 2.2, disable your Apache 2.2 HTTP server so that is does not automatically start:

     systemctl disable httpd

     8. If you are upgrading from Apache 2.2, stop your Apache 2.2 HTTP server:

     systemctl stop httpd

     9. If you have any special php.ini configuration options set, copy the php.ini file to the /etc/php.d/php.ini/ directory, for example:

     cp /etc/opt/rh/rh-php72/php.d/php.ini /etc/php.d/php.ini

     10. Copy the perforce-swarm-site.conf file to the /etc/httpd/conf.d/ directory if it is not already in there, for example:

     cp /opt/rh/httpd24/root/etc/httpd/conf.d/perforce-swarm-site.conf /etc/httpd/conf.d/perforce-swarm-site.conf

     11. Replace the /log/httpd24 filepath with /log/httpd/ in the perforce-swarm-site.conf file using the sed command:

     sed -i "s#/log/httpd24/#/log/httpd/#g" /etc/httpd/conf.d/perforce-swarm-site.conf

     12. Enable your Apache 2.4 HTTP server so that it automatically starts:

     systemctl enable httpd

     13. Start the Apache 2.4 HTTP server:

     systemctl start httpd

     14. Enable your Apache 2.4 HTTP server so that it automatically starts:

     systemctl enable httpd

     15. Start the Apache 2.4 HTTP server:

     systemctl start httpd

     16. Optional, ImageMagick: when ImageMagick is enabled, P4 Code Review can display the following image formats: BMP, EPS, PSD, TGA, TIFF.

         1. Install ImageMagick:

         yum install ImageMagick

         2. Restart the web server to so that ImageMagick is picked up.

         systemctl restart httpd

     17. If you are upgrading from P4 Code Review 2020.1, restart your Redis server:

     systemctl restart redis-server-swarm

     18. Check that SELinux is working correctly for your system. For instructions on configuring SELinux on RHEL, see SELinux configuration.
   - RHEL 9 (run these commands as root):
     1. Run an upgrade for PHP, this will also upgrade the P4 Code Review packages:

     dnf update

     2. If you didn't run dnf update in the previous step, run the P4 Code Review package upgrade now:

     yum install helix-swarm helix-swarm-triggers helix-swarm-optional

     If you are upgrading from P4 Code Review 2019.3 to P4 Code Review 2021.1 or later, remove the P4 Code Review PHP 7.1 files:

     yum remove $(yum list installed | grep php71 | awk '{print $1}')

     3. Optional, ImageMagick: when ImageMagick is enabled, P4 Code Review can display the following image formats: BMP, EPS, PSD, TGA, TIFF.

        1. Install ImageMagick:

        yum install ImageMagick

        2. Restart the web server to so that ImageMagick is picked up.

        systemctl restart httpd

     4. Check that SELinux is working correctly for your system. For instructions on configuring SELinux on RHEL, see SELinux configuration.
2. P4 Code Review generally has several major updates each year, and may occasionally have a patch update between major updates. To determine whether a P4 Code Review update is available.

Run the following command as root:

    yum list updates | grep swarm

P4 Code Review uses a Redis server to manage its caches. This is installed and configured on the P4 Code Review machine during the upgrade. If you prefer to use your own Redis server, see Use your own Redis server.

## Configuring P4 Server event notification

P4 Code Review needs to know about a number of P4 Server events to operate correctly, this can be done by using P4 Server Extensions or P4 Server Triggers. P4 Code Review installs include the P4 Code Review P4 Server extension file and trigger scripts required for P4 Code Review to get the events it needs from your P4 Server.

You must install the P4 Code Review P4 Server extension or update your Triggers to complete the P4 Code Review upgrade.

Do one of the following so that P4 Code Review is notified about events on the P4 Server:

- Install and configure the P4 Code Review P4 Server extension, see Installing the P4 Code Review P4 Server extension

- Update your P4 Code Review Triggers, see Updating your triggers

### Installing the P4 Code Review P4 Server extension

- If you are using the P4 Code Review P4 Server extension, P4 Code Review P4 Server Triggers must not be installed.

- You must be a user with super user permissions to install and configure P4 Server Extensions.

#### Prerequisites

To install the P4 Code Review P4 Server extension you need:

A compatible version of P4 Server for P4 Server Extensions:

- Linux: P4 Server 2021.2 and later. If you are using an earlier version of P4 Server, you must use triggers.

- Windows: P4 Server 2021.2 and later. If you are using an earlier version of P4 Server, you must use triggers.

You will also need:

- P4 Server Extensions installed and configured on your P4 Server.

- Your P4 Code Review user password

- A user with super permissions to install and configure P4 Server Extensions.

#### To install the P4 Code Review P4 Server extension

There are two ways to install the P4 Code Review P4 Server extension:

- Run the interactive post-installation configuration script. See Install process using the interactive post-installation configuration script.

  The P4 Code Review post-installation configuration script can be used in a few different ways. The steps below outline the most straightforward configuration using an interactive install, but you can review the options by running:

  sudo /opt/perforce/swarm/sbin/configure-swarm.sh -h

- Alternatively, use the swarm-extctl.sh script file located in /opt/perforce/swarm/sbin directory. The swarm-extctl.sh script file specifically handles the extension upgrade. See Install process using the swarm-extctl.sh script.

Install process using the interactive post-installation configuration script

1. Run the interactive post-installation configuration script to install the P4 Code Review P4 Server extension:

   sudo /opt/perforce/swarm/sbin/configure-swarm.sh

   The configuration script displays a summary for your P4 Code Review instance:

       ------------------------------------------------------------
       configure-swarm.sh: Thu Feb 17 14:20:49 PDT 2021: commencing configuration of Swarm
       Summary of arguments passed:
       Interactive?       [yes]
       Force?             [no]
       P4PORT             [(not specified, will prompt)]
       Swarm user         [(not specified, will prompt, will suggest swarm)]
       Swarm password     [(not specified, will prompt)]
       Email host         [(not specified, will prompt)]
       Use Extensions?    [(not specified, will prompt)]
       Swarm host         [(not specified, will prompt, will suggest myhost)]
       Swarm port         [(default (80))]
       Swarm base URL     [(default (empty))]
       Create Swarm user? [yes]
       Super user         [(not specified, will prompt)]
       Super password     [(not specified, will prompt)]

2. The configuration script prompts you for your P4 Code Review configuration details.

   Enter your P4 Code Review user password when prompted, all of the other details are pre-filled with your existing P4 Code Review configuration. Press the [Enter] key to accept each of them.

3. The script prompts you to use the P4 Code Review P4 Server extension.

       Do you want to use Swarm's Helix Core server extension?
       Configuring Server extensions requires super user access to the Helix Server.
       If you install the Swarm server extension, do not install the Swarm triggers.
       Server extensions are supported for:
       * Linux: Helix server 19.2 and later.
       * Windows: Helix server 21.2 and later.

       Use server extensions? (y/n) [n]

Type y to use P4 Server Extensions.

4. Sign in as a user with super permissions when prompted.

5. The script checks that P4 Server Extensions can be installed.

The script will:

- check your P4 Server supports P4 Server Extensions

- check if P4 Server Extensions are installed and configured on your P4 Server. If they are, P4 Code Review does not need to do anything

- check if P4 Code Review P4 Server Triggers are installed on the server

If any of these checks fail, P4 Code Review will not install the P4 Code Review P4 Server extension and will report the issues on the configuration summary screen.

6. If P4 Code Review Triggers are installed, you are prompted to remove them.

    P4 Code Review triggers are installed on this server and must be removed
    before installing extensions. You can either have this script
    automatically remove them, or you can quit and do it manually.
    Do you want to automatically remove the triggers? (y/n) [n]

- Recommended: Type y to get the script to automatically remove the P4 Code Review P4 Server Triggers.

The P4 Code Review P4 Server Triggers are not deleted immediately, the triggers to be removed are listed so you can review them before removing them.

- Type n to manually remove the P4 Code Review P4 Server Triggers from the trigger spec file.

7. The script requests confirmation that it is okay to remove the triggers:

    Are you sure it is okay to remove these triggers? (y/n) [n]

- Recommended: Type y to automatically remove the triggers if the list of triggers looks correct.

The script will:

- save a timestamped copy of your old trigger spec to /opt/perforce/swarm/triggers.saved.yyyymmdd-hhmmss

- save a timestamped copy of the new trigger spec to /opt/perforce/swarm/triggers.noswarm.yyyymmdd-hhmmss

- remove the P4 Code Review P4 Server Triggers from the trigger spec and save it

If either of the trigger specs contain sensitive information, move them to a secure location.

- Type n if you see something wrong with the P4 Code Review P4 Server Triggers marked for removal or if you want to remove the triggers from the trigger spec manually. You are offered the option of automatically opening your trigger spec file in your default text editor or opening the file manually in a text editor. Save your changes and rerun the post-installation configuration script to complete the installation of the P4 Code Review P4 Server extension.

8. The script will now install and configure the P4 Code Review P4 Server extension for you. When it has completed the configuration, the configuration summary screen is displayed, for example:

    ...........
    - installing instance configuration
    Extension config swarm saved
    configure-swarm.sh: Thu Feb 17 14:31:36 PDT 2021: completed configuration of Helix Swarm

    ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
    ::
    ::  Swarm is now configured and available at:
    ::
    ::      http://myhost/
    ::
    ::  Ensure that you have configured the P4 Code Review hostname in your
    ::  network's DNS, or have added an IP address-to-hostname
    ::  mapping to your computer's hosts configuration so that you
    :: can access P4 Code Review.
    ::
    ::  You may login as the Swarm user [swarm] using the password
    ::  you specified.
    ::
    ::  Server side extensions are installed and configured
    ::  on your P4D server.
    ::
    ::  Documentation for optional post-install configuration, such as
    ::  configuring Swarm to use HTTPS, operate in a sub-folder, or on a
    ::  custom port, is available:
    ::
    ::  https://www.perforce.com/perforce/doc.current/manuals/swarm/setup.post.html
    ::
    ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::

9. The P4 Code Review upgrade is now complete.

Install process using the swarm-extctl.sh script

1. Navigate to the the swarm-extctl.sh script file located in /opt/perforce/swarm/sbin directory.

2. Run the following commands as root:

   1. Backup the current configuration. Ensure that the current configuration is correctly backed up before continuing.

      sudo ./swarm-extctl.sh -p <masterserverIp:port> -u <username> save

   2. Remove the existing extension from the master.

      sudo ./swarm-extctl.sh -p <masterserverIp:port> -u <username> delete

   3. Install the latest version of P4 Code Review P4 Server extension located on the P4 Code Review server on the master. The following command will check for all saved configurations and apply them during install.

      sudo ./swarm-extctl.sh -p <masterserverIp:port> -u <username> install

3. The P4 Code Review upgrade is now complete.

#### Next step

Now Validate your upgrade.

### Updating your triggers

If you are using P4 Code Review P4 Server Triggers, the P4 Code Review P4 Server extension must not be installed.

1. Copy the new P4 Code Review trigger script to your P4 Server machine. The trigger script is `SWARM_ROOT/p4-bin/scripts/swarm-trigger.pl`, and requires installation of Perl 5.08+ (use the latest available) on the P4 Server machine. If P4 Code Review is using SSL, then the triggers also require the `IO::Socket::SSL` Perl module.

   Do not overwrite any existing trigger script at this time. Give the script a new name, for example: `swarm-trigger-new.pl`.

2. Configure the P4 Code Review trigger script by creating, in the same directory on the P4 Server machine, `swarm-trigger.conf`. It should contain:

   If you already have a `swarm-trigger.conf` file, no additional configuration is required.

       # SWARM_HOST (required)
       # Hostname of your Swarm instance, with leading "http://" or "https://".
       SWARM_HOST="http://my-swarm-host"

       # SWARM_TOKEN (required)
       # The token used when talking to Swarm to offer some security. To obtain the
       # value, log in to Swarm as a super user and select 'About Swarm' to see the
       # token value.
       SWARM_TOKEN="MY-UUID-STYLE-TOKEN"

       # ADMIN_USER (optional) Do not use if the Workflow feature is enabled (default)
       # For enforcing reviewed changes, optionally specify the normal Perforce user
       # with admin privileges (to read keys); if not set, will use whatever Perforce
       # user is set in environment.
       ADMIN_USER=

       # ADMIN_TICKET_FILE (optional) Do not use if the Workflow feature is enabled (default)
       # For enforcing reviewed changes, optionally specify the location of the
       # p4tickets file if different from the default ($HOME/.p4tickets).
       # Ensure this user is a member of a group with an 'unlimited' or very long
       # timeout; then, manually login as this user from the Perforce server machine to
       # set the ticket.
       ADMIN_TICKET_FILE=

       # VERIFY_SSL (optional)
       # If HTTPS is being used on the Swarm web server, then this controls whether
       # the SSL certificate is validated or not. By default this is set to 1, which
       # means any SSL certificates must be valid. If the web server is using a self
       # signed certificate, then this must be set to 0.
       # set the ticket.
       VERIFY_SSL=1

   Fill in the required SWARM_HOST and SWARM_TOKEN variables with the configuration from any previous P4 Code Review trigger script, typically `swarm-trigger.pl`.

   The ADMIN_USER and ADMIN_TICKET variables were used by the 'enforce triggers' in P4 Code Review 2019.1 and earlier. They can be removed unless you are explicitly disabling workflow and using the deprecated 'enforce triggers'.

   P4 Code Review 2015.4 and earlier: P4 Code Review trigger script files were available as shell scripts in these earlier P4 Code Review versions, typically `swarm-trigger.sh`.

   P4 Code Review must now use a Perl trigger script file, typically `swarm-trigger.pl`.

3. On Linux: ensure that the script is executable:

   sudo chmod +x swarm-trigger-new.pl

4. Rename the new trigger script:

   On Linux:

   mv swarm-trigger-new.pl swarm-trigger.pl

   On Windows:

   ren swarm-trigger-new.pl swarm-trigger.pl

5. Update the triggers in your P4 Server.

   - The swarm.shelvedel shelve-delete trigger line was added to P4 Code Review in version 2018.1 and updated in version 2020.1.

     - Upgrading from P4 Code Review 2017.4 and earlier: add the `swarm.shelvedel shelve-delete` trigger line to the P4 Server trigger table if it is not already present, see Update the P4 Server triggers table to run the trigger script.
     - Upgrading from P4 Code Review 2018.x and 2019.x: replace the existing `swarm.shelvedel shelve-delete` trigger line in the P4 Server trigger table with the one supplied in the P4 Code Review version you are upgrading to.

   - Workflow feature:

     The Workflow feature is enabled by default in P4 Code Review 2019.2 and later. The trigger lines required when workflow is enabled are different to those required when workflow is disabled:

     - Workflow feature enabled (default):
       - Comment out the swarm.enforce.1, swarm.enforce.2, swarm.strict.1, and swarm.strict.2 trigger lines in the P4 Server trigger table if they are present, see Update the P4 Server triggers table to run the trigger script.
       - Add the `swarm.enforce change-submit`, `swarm.strict change-content`, and `swarm.shelvesub shelve-submit` trigger lines to the P4 Server trigger table if they are not already present, see Update the P4 Server triggers table to run the trigger script.
     - Workflow feature disabled:

       Comment out the `swarm.enforce change-submit`, `swarm.strict change-content`, and `swarm.shelvesub shelve-submit` trigger lines in the P4 Server trigger table if they are present, see Update the P4 Server triggers table to run the trigger script.

   1. Run the P4 Code Review trigger script to capture (using Ctrl+C on Windows and Linux) the trigger lines that should be included in the Perforce trigger table:

      On Linux:

      ./swarm-trigger.pl -o

      On Windows:

      path/to/perl swarm-trigger.pl -o

   2. As a Perforce user with super privileges, update the Perforce trigger table by running `p4 triggers` command and replacing any `swarm.*` lines with the previously captured trigger line output (using Ctrl+V on Windows and Linux).

   If you previously customized the P4 Code Review trigger lines, perhaps to apply various Trigger options, be sure to repeat those customizations within the updated trigger lines.

#### Next step

Now Validate your upgrade.

## Validate your upgrade

When P4 Code Review starts it verifies the Redis cache, during this time you cannot log in to P4 Code Review. The time taken to verify the Redis cache depends on the number of users, groups, and projects P4 Code Review has. Start-up time can be improved by persisting the memory cache. You can persist the memory cache by disabling background saves and enabling append saves in the redis-server.conf file, see Redis server configuration file.

Check that your upgraded P4 Code Review instance is working correctly by doing the following:

1. Create a new changelist that:
   1. Contains at least one modified file
   2. Contains the #review keyword in the changelist description
2. Right click on the new changelist in P4V and click Shelve Files...

Do not select Request New Review... because this method uses the API and will not fully test the P4 Code Review P4 Server extension.

This is also true if you are using P4 Code Review P4 Server Triggers instead of the P4 Code Review P4 Server extension.

3. Check that a new review is created for the changelist.

- If a review is created, the P4 Code Review P4 Server extension is working. If you are using P4 Code Review P4 Server Triggers instead of the P4 Code Review P4 Server extension and the review is created, the triggers are working.
- If a review is not created, see Review not created.

## P4 Code Review index upgrade

If you are upgrading from P4 Code Review 2017.2 or earlier you should run the index upgrade, this ensures that the review activity history is displayed in the correct order on the Dashboard, and Reviews list pages.

If you are upgrading from P4 Code Review version 2017.3 or later, the index upgrade step is not required.

The index upgrade process can be configured to suit your P4 Code Review system specifications. See Upgrade index for details.

Run the upgrade as an Admin user by visiting the following URL:

    http://SWARM-HOST/upgrade

After the P4 Code Review upgrade, on the first visit to some P4 Code Review pages, users might see a message to perform a browser hard refresh. This happens because we are updating the UI and content of some P4 Code Review pages, so the user's page cache is no longer valid and requires a hard refresh to load the upgraded page. For example, for Chrome on Windows/Linux [CTRL]+[F5].

## Secure your P4 Code Review installation

To make your P4 Code Review installation more secure apply the following recommendations for HTTP and P4 Code Review implementation through security groups.

### HTTP

Here is a list of best practices to use when port 80 is exposed for HTTP traffic:

- Redirect to HTTPS: If Port 80 needs to be open to support legacy systems or specific use cases, ensure that all HTTP traffic is redirected to HTTPS to encrypt data in transit.

- Use HSTS (HTTP Strict Transport Security) headers: Implement HSTS headers to force browsers only to use secure HTTPS connections when interacting with your server.

- Close port 80: If there is no requirement to use HTTP, Port 80 must be closed entirely to prevent any unencrypted data transmission.

- Implement SSL/TLS (secure sockets layer and transport layer security) certificates: Ensure that your server is configured with a valid SSL/TLS certificate to enable secure HTTPS connections.

- Firewall configuration: Configure firewalls to block or filter access to Port 80, particularly from untrusted networks.

- Continuous monitoring and auditing: Regularly monitor network traffic and audit server configurations to ensure that unnecessary ports are not exposed and that data is transmitted securely.

When you implement HTTPS, you must make the following changes:

1. Modify your cron job for the P4 Code Review workers.

   Edit the cron configuration file to point to your HTTPS URL, for example, https://HOSTNAME/. For more information about how to edit the cron configuration file, see Set up a recurring task to spawn workers.

   To verify if the cron configuration file points to your HTTPS URL, run the following curl statement:

   curl https://myswarm.host/queue/worker

2. Modify the P4 Code Review Extension or Trigger configuration.

   If you are using the P4 Code Review extension run the following command and change ExtConfig’s P4 Code Review URL to be your new HTTPS URL:

   p4 extension --configure Perforce:helix-swarm

   If you are using triggers, edit swarm-trigger.pl configuration file and set your SWARM_HOST to be https.

3. Edit the external_url in the `SWARM_ROOT/data/config.php` file’s environment block to point to your HTTPS URL. This URL is used in emails, Jira links, and P4 Code Review test’s pass-and-fail outgoing URL parameters.

   If you make a configuration change, P4 Code Review will not use it until the configuration cache has been reloaded, this forces P4 Code Review to use the new configuration. You must be an admin or super user to reload the P4 Code Review config cache. Navigate to the User id dropdown menu, select System Information, click the Cache Info tab, and click the Reload Configuration button.

4. Modify the P4 Server's P4.Swarm.URL property. For more information about P4 Server integration, see Client integration.

   If your Apache server is listening on both HTTPS and HTTP in perforce-swarm-site.conf file, you must set the auto_register_urlconfigurable in the p4 block to false and correctly configure the P4.Swarm.URL property .

   If your Apache server is listening only on HTTPS and if the auto_register_urlconfigurable in the p4 block is set to true (default value), an Apache restart will correct the property.

   To get all your current values for P4.Swarm.URL property, run:

   p4 -Ztag property -A -l -n P4.Swarm.URL

   Ensure that the P4.Swarm.URL property points to your HTTPS URL.

5. Modify the URL of all applications. Any other applications that reference the URL should be switched to using the HTTPS URL.

### P4 Code Review implementation through security groups

Here is a list of best practices for implementation using security groups or the user's preferred setup:

- Use a trusted proxy: Ensure to only use a trusted proxy, such as allow lists, Content Delivery Networks (CDN), and API Gateways.

- Backend servers and other proxies or load balancers should be disabled: Ensure that direct access to backend servers and other proxies or load balancers is disabled, except through the trusted proxy mentioned above. This will prevent unauthorized access while ensuring that all requests are filtered through the trusted proxy.

- Continuous monitoring and logging of the X-Forwarded-For header: Implement monitoring and logging on the X-Forwarded-For header to track and identify any suspicious activities. This can help in identifying and preventing potential malicious activity or security threats.

- Use a secure protocol: Implement a secure protocol such as HTTPS to encrypt the communications between the client and the load balancers, and between the load balancer and backend server to prevent eavesdropping or tampering with the X-Forwarded-For header.

- Configure X-Forwarded-For header: Configure the processing mode of the X-Forwarded-For header (append, preserve, or remove) based on specific technical or security requirements.

All done!

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