To install ESB3024 Router, one first needs to copy the installation ISO image to the target node where the router will be run. Due to the way the installer operates, it is necessary that the host is reachable by password-less SSH from itself for the user account that will perform the installation, and that this user has sudo access.

Prerequisites:

1. Ensure that the current user has sudo access.

   sudo -l
   

   If the above command fails, you may need to add the user to the /etc/sudoers file.

2. Ensure that the installer has password-less SSH access to localhost.

   If using the root user, the PermitRootLogin property of the /etc/ssh/sshd_config file must be set to ‘yes’.

   The local host key must also be included in the .ssh/authorized_keys file of the user running the installer. That can be done by issuing the following as the intended user:

   mkdir -m 0700 -p ~/.ssh
   ssh-keyscan localhost >> ~/.ssh/authorized_keys
   

   Note! The ssh-keyscan utility will result in the key fingerprint being output on the console. As a security best-practice its recommended to verify that this host-key matches the machine’s true SSH host key. As an alternative, to this ssh-keyscan approach, establishing an SSH connection to localhost and accepting the host key will have the same result.

3. Disable SELinux.

   The Security-Enhanced Linux Project (SELinux) is designed to add an additional layer of security to the operating system by enforcing a set of rules on processes. Unfortunately out of the box the default configuration is not compatible with the way the installer operates. Before proceeding with the installation, it is recommended to disable SELinux. It can be re-enabled after the installation completes, if desired, but will require manual configuration. Refer to the Red Hat Customer Portal for details.

   To check if SELinux is enabled:

   getenforce
   

   This will result in one of 3 states, “Enforcing”, “Permissive” or “Disabled”. If the state is “Enforcing” use the following to disable SELinux. Either “Permissive” or “Disabled” is required to continue.

   setenforce 0
   

   It is recommended to reboot the computer after changing SELinux modes, but the changes should take effect immediately.

Assuming the installation ISO image is in the current working directory, the following steps need to be executed either by root user or with sudo.

1. Mount the installation ISO image under /mnt/acd.

   Note: The mount-point may be any accessible path, but /mnt/acd will be used throughout this document.

   mkdir -p /mnt/acd
   mount esb3024-acd-router-esb3024-1.8.0.iso /mnt/acd
   

2. Run the installer script.

   /mnt/acd/installer
   

Upgrade

The upgrade procedure for the router is performed by taking a backup of the configuration, installing the new version of the router, and applying the saved configuration.

1. With the router running, save a backup of the configuration.

   The exact procedure to accomplish this depends on the current method of configuration, e.g. if confd is used, then the configuration should be extracted from confd, but if the REST API is used directly, then the configuration must be saved by fetching the current configuration snapshot using the REST API.

   Extracting the configuration using confd is the recommend approach where available.

   confcli | tee config_backup.json
   

   To extract the configuration from the REST API, the following may be used instead. Depending on the version of the router used, an API-Key may be required to fetch from the REST API.

   curl --insecure https://localhost:5001/v2/configuration \
     | tee config_backup.json
   

   If the API Key is required, it can be found in the file /opt/edgeware/acd/router/cache/rest-api-key.json and can be passed to the API by setting the value of the X-API-Key header.

   curl --insecure -H "X-API-Key: 1234abcd" \
     https://localhost:5001/v2/configuration \
     | tee config_backup.json
   

2. Mount the new installation ISO under /mnt/acd.

   Note: The mount-point may be any accessible path, but /mnt/acd will be used throughout this document.

   mkdir -p /mnt/acd
   mount esb3024-acd-router-1.2.0.iso /mnt/acd
   

3. Stop the router and all associated services.

   Before upgrading the router it needs to be stopped, which can be done by typing this:

   systemctl stop 'acd-*'
   

4. Run the installer script.

   /mnt/acd/installer
   

5. Migrate the configuration.

   Note that this step only applies if the router is configured using confd. If it is configured using the REST API, this step is not necessary.

   See Configuration changes between 1.4.0 and 1.6.0 for instructions on how to migrate the configuration to release 1.6.0.

Troubleshooting

If there is a problem running the installer, additional debug information can be output by adding -v or -vv or -vvv to the installer command, the more “v” characters, the more detailed output.