Adding a Data Node to an HA Cluster - TufinOS

Overview

This procedure is for adding a data node to an existing TOS Aurora cluster running on TufinOS. If you have not yet installed TOS Aurora, on the primary data node, start with the appropriate clean install procedure.

For all other installation paths such as upgrade or other platforms, see the menu for the appropriate procedure.

You do not need to install TOS on non-primary data nodes.

For more information on high availability, see High Availability.

Prerequisites

  • This procedure must be performed by an experienced Linux administrator with knowledge of network configuration.

  • To ensure optimal performance and reliability, the required resources need to be allocated exclusively to TOS. If resources become unavailable, this will affect TOS performance. Do not oversubscribe resources.

  • You cannot use IP Tables. All IP tables rules will be flushed when adding the node.

  • Your primary data node must also be deployed on TufinOS.

  • You must know the resources you will need - CPU cores, RAM, disk space and the load-model parameter, provided by your account team based on the procedure Calculate resources - clean install.

  • If you intend to use syslog, allocate a syslog VIP on the same subnet as your primary VIP.

  • (On-premises deployments only) The node's network IP must be on the same subnet as the cluster primary VIP.

  • Give the node a unique hostname in the cluster - use the command below, replacing <mynode> with your preferred name:

    • [<ADMIN> ~]$ sudo hostnamectl set-hostname <mynode>
    sudo hostnamectl set-hostname <mynode>

Tufin Appliance Requirements

VMware Requirements

  • Your ESX host must be running VMware ESXi 6.5, 6.7, 7.0 or 8.0 only. ESXi 8.0 requires TufinOS 4.20 or later

  • Your ESX host disk(s) must be SSD with 7,500 IOPS and 250MB/s throughput, or higher.

Downloads

This section is only relevant for VMWare. Tufin appliances come pre-installed with TufinOS. If you wan to update TufinOS to the latest version, see Update TufinOS 4.x to 4.40

  1. Download the TufinOS 4.40 installation package from the Download Center.

    2. The downloaded files are in .tgz format <FILENAME>.tgz.

  2. Extract the TufinOS image from its archive.
    3. [<ADMIN> ~]$ sudo tar xzvf <FILENAME>.tgz
    sudo tar xzvf <FILENAME>.tgz

    The run file name includes the release, version, build number, and type of installation.

    TufinOS ISO file example: TufinOS-4.40-4368238-x86_64-Final.iso

    TufinOS USB file example: TufinOS-4.40-4368238-x86_64-Final.usb.img

  3. Verify the integrity of the TufinOS installation package.

    [<ADMIN> ~]# sha256sum -c TufinOS-X.XX-XXXXXX-x86_64-Final.iso.sha256
    sha256sum -c TufinOS-X.XX-XXXXXX-x86_64-Final.iso.sha256
    [<ADMIN> ~]# sha256sum -c TufinOS-X.XX-XXXXXX-x86_64-Final.usb.img.sha256
    sha256sum -c TufinOS-X.XX-XXXXXX-x86_64-Final.usb.img.sha256

    The output should return OK

Move The etcd Database to A Separate Disk

The etcd database should be on a separate disk to improve the stability of TOS Aurora and reduce latency. Moving the etcd database to a separate disk ensures that the kubernetes database has access to all the resources required to ensure an optimal TOS performance. This will require some down time as you are going to have to shut down TOS before separating the disks.

See Move etcd - HA Non-Cloud VM

Procedure

Before you proceed, read and understand Prerequisites - this may prevent unexpected failures.

    1. Place the TufinOS ISO image file on the datastore of vSphere. For local installation on a VMware machine, locate the extracted ISO image file.

    2. Confirm that in your virtual machine settings, Boot Options is configured to use BIOS. If you are using EFI, the procedure will not work.

    3. Edit the properties of the virtual CD/DVD drive, and do one of the following:

      Using vSphere:

      • As Device Type select Datastore ISO file, and browse to the TufinOS ISO image.

      • Under Device Status, select Connect at power on.

      Using a workstation:

      • Under Device Status, select Connect at power on.

      • Under Connection, select Use ISO image file, and browse to the TufinOS ISO image.

    4. Set the VM to boot to BIOS configuration

      1. Navigate to VM settings > VM options.
      2. Check: During the next boot, force entry into the BIOS setup screen.

    5. In BIOS > Boot, select CD-ROM Drive.

    6. In BIOS > Exit, select Exit Saving Changes. Click Yes.

    7. Save the settings.

    8. Restart the VM. TufinOS installation begins.

    9. Select TufinOS 4.40 Installation for TOS Aurora.

    10. When prompted, select Install TufinOS 4.40 for Data Node:

    11. When prompted, confirm and choose Yes.

    12. When the installation is complete, reboot the virtual machine.

    13. When BIOS launches, change the Boot option to Hard Drive.

    14. In BIOS > Exit, select Exit Saving Changes. Click Yes.

    15. Log in using the default admin user credentials:

      username: tufin-admin

      password: admin (you will be prompted to change this on first log in)

      IP address: assigned by DHCP

    1. If you want to reset the host name or IP of the machine, do so now. Once TOS Aurora has been installed, changing the host name or IP address will require reinstalling - see Changing IP Address/Host Names. To change the host name, use the command below, replacing <mynode> with your preferred name:

      [<ADMIN> ~]$ sudo hostnamectl set-hostname <mynode>
      sudo hostnamectl set-hostname <mynode>

    2. Configure the server timezone:

      [<ADMIN> ~]$ sudo timedatectl set-timezone <timezone>
      sudo timedatectl set-timezone <timezone>

      where <timezone> is in the format Area/Location. Examples: America/Jamaica, Hongkong, GMT, Europe/Prague.

      To view a list of the time-zone formats that can be used, run:

      [<ADMIN> ~]$ sudo timedatectl list-timezones
      sudo timedatectl list-timezones

    3. Synchronize your machine time with a trusted NTP server. Follow the steps in Configuring NTP Using Chrony. In an HA deployment, all servers need to be synchronized to the same time.

    4. Configure the IP address and DNS, where <Interface Name> is the name of the interface you are using (for example, ens32). If you have several network interfaces, configure the first one.

      Run the command: 

      [<ADMIN> ~]$ sudo /opt/tufinos/scripts/network_interface_by_pci_order.sh | awk -F'=' '/NET_IFS\[0\]/ { print $NF }'
      sudo /opt/tufinos/scripts/network_interface_by_pci_order.sh | awk -F'=' '/NET_IFS\[0\]/ { print $NF }'

    5. To assign a static IP address:

      1. Run the command: 

        2. [<ADMIN> ~]$ sudo nmtui edit <Interface Name>
        sudo nmtui edit <Interface Name>

        and set the following parameters in the window:

        • Set IPv4 CONFIGURATION to Manual
        • Set Addresses for the physical IP, together with the chosen subnet
        • Set Gateway and DNS Servers to the IPs used by your organization
      2. Restart the network service. 
        3. [<ADMIN> ~]$ sudo systemctl restart NetworkManager.service
        sudo systemctl restart NetworkManager.service

    6. Run:

      [<ADMIN> ~]$ sudo nslookup <DNS SERVER IP>
      sudo nslookup <DNS SERVER IP>

      If the name of the server is displayed, the DNS server can resolve its own address using a reverse lookup.

      Example Output

      [<ADMIN> ~]$ sudo nslookup  1.2.3.4
4.3.2.1.in-addr.arpa	name=EXAMPLE.company.com

      If the name of the server is not displayed, set it using a reverse lookup entry at /etc/hosts.

      Example Output where 1.2.3.4 4.3.2.1.in-addr-arpa was added.

      [<ADMIN> ~]$ sudo cat /etc/hosts 
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost6 localhost6.localdomain6
1.2.3.4 admin.company.com admin
2.3.4.5 5.4.3.2.in-addr-arpa

       

      1. Log in to the primary data node.

      2. On the primary data node:

        [<ADMIN> ~]$ sudo tos cluster node add --role=data
        sudo tos cluster node add --role=data

        On completion, a new command string is displayed, which you will need to run on the new node within 30 minutes. If the allocated time expires, you will need to repeat the current step.

      3. Copy the command string to the clipboard.

      4. Log in to the new node.

      5. On the new node, paste the command string copied previously and run it. If the allocated time has expired, you will need to start from the beginning.
      6. Verify that the node was added by running sudo tos cluster node list on the primary data node.

    1. On the primary data node, check the TOS status.

      [<ADMIN> ~]$ sudo tos status
      sudo tos status

    2. In the output, check if the System Status is Ok and all the items listed under Components appear as ok. If this is not the case, contact Tufin Support.

      3. Example output:

      [<ADMIN> ~]$ tos status         
[Mar 28 13:42:09]  INFO Checking cluster health status           
TOS Aurora
Tos Version: 24.2 (PRC1.1.0)

System Status: "Ok"
            
Cluster Status:
   Status: "Ok"
   Mode: "Preparing High Availability"

Nodes
  Nodes:
  - ["datanode1"]
    Type: "Primary"
    Status: "Ok"
    Disk usage:
    - ["/opt"]
      Status: "Ok"
      Usage: 32%
  - ["datanode2"]
    Type: "Data Node"
    Status: "Ok"
    Disk usage:
    - ["/opt"]
      Status: "Ok"
      Usage: 16%
 
registry
  Expiration ETA: 819 days
  Status: "Ok"

Infra
Databases:
- ["cassandra"]
  Status: "Ok"
- ["kafka"]
  Status: "Ok"
- ["mongodb"]
  Status: "Ok"
- ["mongodb_sc"]
  Status: "Ok"
- ["ongDb"]
  Status: "Ok"
- ["postgres"]
  Status: "Ok"
- [postgres_sc"]
  Status: "Ok"

Application
Application Services Status OK
Running services 54/54

  Backup Storage:
  Location: "Local
s3:http://minio.default.svc:9000/velerok8s/restic/default "
  Status: "Ok"
  Latest Backup: 2024-03-23 05:00:34 +0000 UTC