Manage installation questions

Describes Redis Enterprise Software installation questions and how to answer them automatically.

Several questions are displayed during the Redis Enterprise Software installation process.

Here, you'll find a list of these questions and learn how to automatically answer these questions to perform a silent install.

Installation questions

Several questions appear during installation:

• Linux swap file - Swap is enabled. Do you want to proceed? [Y/N]?

  We recommend that you disable Linux swap in the operating system configuration to give Redis Enterprise Software control of the memory allocation.

• Automatic OS tuning - Do you want to automatically tune the system for best performance [Y/N]?

  To allow the installation process to optimize the OS for Redis Enterprise Software, answer Y. The installation process prompts you for additional information.

  The /opt/redislabs/sbin/systune.sh file contains details about the tuning process.

• Network time - Do you want to set up NTP time synchronization now [Y/N]?

  Redis Enterprise Software requires that all cluster nodes have synchronized time. You can either let the installation process configure NTP or you can configure NTP manually.

• Firewall ports - Would you like to open RedisLabs cluster ports on the default firewall zone [Y/N]?

  Redis Enterprise Software requires that all nodes have specific network ports open. To open the ports, you can:

  • Answer Y to let the installation process open these ports.
  • Answer N and configure the firewall manually for RHEL/CentOS firewall.
  • Answer N and configure the firewall on the node manually for your OS.

• Installation verification (rlcheck) - Would you like to run rlcheck to verify proper configuration? [Y/N]?

  Run the rlcheck installation verification to make sure that the installation completed successfully. If you want to run this verification at a later time, you can run:

  /opt/redislabs/bin/rlcheck
  

• User already exists - The user 'redislabs' already exists, which may lead to problems if it wasn't configured correctly. Would you like to proceed with the installation? (Y/N)?

• Group already exists - The group 'redislabs' already exists, which may lead to problems if it wasn't configured correctly. Would you like to proceed with the installation? (Y/N)?

• Update PATH - Add Redis-Enterprise paths to $PATH variable (recommended) [Y/N]?

Answer install questions automatically

To perform a silent (or automated) install, answer the questions when you start the install.

Answer yes to all questions

To automatically answer yes to all questions (which accepts the default values), run the installation script with the -y parameter:

./install.sh -y

Configure file to answer

Use an answer file to manage your response:

1. Create a text file to serve as an answer file.

   The answer file can contain any of the following installation question parameters. If a parameter is not included in the file, the installation script will ask for your answer.

   Parameter	Values	Description
   firewall	yes no	Configure firewall and open required Redis ports.
   ignore_existing_osuser_osgroup	yes no	Proceed if redislabs user/group already exists.
   ignore_master_version	yes no	Continue the upgrade even if the primary node isn't upgraded. If no, stops installation if the primary node hasn't been upgraded.
   ignore_swap	yes no	Continue even if swap is enabled. If no, stops installation if swap is enabled.
   ntp	yes no	Configure NTP for time synchronization.
   rlcheck	yes no	Run rlcheck after installation to validate the system.
   update_env_path	yes no	Add Redis Enterprise Software paths to the PATH environment variable.
   systune	yes no	Automatically tune system performance (CPU, sysctl). If yes, answers yes to all system tuning questions.

   Example answer file:

   ignore_swap=no
   systune=yes
   ntp=no
   firewall=no
   rlcheck=yes
   ignore_existing_osuser_osgroup=no
   update_env_path=no
   ignore_master_version=no
   

2. Run the installation script with the -c command-line option and add the path to the answer file.

   For example:

   ./install.sh -c /home/user/answers