Automated installation with Ansible

Download our Ansible playbook and run it to install easily Gatling Enterprise and Cassandra

Requirements

The installer can be run from anywhere.

Ansible will be used to perform the installation. You’ll need:

  • Python 2.7.7+ or 3.5+
  • Ansible 2.7.6+
  • An instance/VM (at least c4.large or equivalent) running on supported Linux distributions

Supported Linux distributions are:

  • Amazon Linux 1/2
  • CentOS7
  • Debian 8/9/10
  • RHEL (RedHat Enterprise Linux) 7

In case you don’t already use Ansible, you can download it from here. You do not need any Ansible knowledge to use this installer.

If you do want to know more about Ansible, you can check its user guide.

Configuring a proxy

Ansible will use the shell’s proxy when running the script in your computer.

If you need to specify a proxy for the remote machine on which Gatling Enterprise will be installed, you can add environment variables at the installer level:

 - hosts: all

   vars:
     # ...

   roles:
     # ...

+  environment:
+    http_proxy: http://proxy.bos.example.com:8080
+    https_proxy: http://proxy.bos.example.com:8080

Using the installer

Downloading and integrity checking

You can download the installer here:

REPLACE_WITH_YOUR_REPOSITORY_URL/frontline-installer/1.15.3/frontline-installer-1.15.3.zip

We suggest you download and check the integrity of the installer by doing the following:

#!/bin/bash

# The two variables you must change
version=1.15.3
repo_url=REPLACE_WITH_YOUR_REPOSITORY_URL

archive_name=frontline-installer-${version}.zip
archive_url=${repo_url}/frontline-installer/${version}/${archive_name}

curl -O ${archive_url}
curl -O ${archive_url}.sha1

echo "$(cat ${archive_name}.sha1)  ${archive_name}" | sha1sum     -c -
# For MacOS users:                                    shasum -a 1 -c -

If you have aliases on echo and/or cat, you can prefix them with an anti-slash to make sure you are using the original command instead, as such: \echo, \cat.

Configuring the installer

After unzipping the installer, you’ll need to fill in your instance’s SSH connection info and provided UUID in configuration.yml.

all:
  hosts:
    frontline:
      ansible_host: REPLACE_WITH_YOUR_FRONTLINE_HOST
      ansible_ssh_private_key_file: REPLACE_WITH_YOUR_PATH_TO_PRIVATE_KEY_FILE
      ansible_user: REPLACE_WITH_YOUR_FRONTLINE_HOST_USER

  vars:
    frontline:
      uuid: REPLACE_WITH_YOUR_OWN_UUID

You can also modify in configuration.yml whether you want to install build tools (Maven, Gradle, sbt), Nginx or kubectl (required for Kubernetes pools).

Running the installer

Type in ./installer.sh and wait for the installation to end.

The script will ask for a sudo password. On Amazon Linux 1/2, the default user (ec2-user) is able to sudo without any password, so you can just type in <Enter> twice.

The script is idempotent. It means you can run it multiple times without compromising your previous installation. It also means you can start over a previous failed run and continue on.

Running the installer locally

In case you don’t have the necessary tools to run Ansible remotely, i.e. running Ansible on your machine in order to install Gatling Enterprise on another machine, you can launch Ansible directly on the machine that will host Gatling Enterprise.

First, you need to copy the inventory configuration.yml file vars inside the playbook frontline.yml file, as such:

- hosts: all

  vars: # part you need to copy
    ...

  roles:
    ...

Then, you will be able to run Ansible directly on the host you intend to install Gatling Enterprise in:

ansible-playbook \
  -b --ask-become-pass \
  -c local \
  -i localhost, \
  frontline.yml

Running Gatling Enterprise

Services will be configured for each installed components of Gatling Enterprise. They will automatically start on boot.

You can control them with the service/systemctl command:

# On SysV-based distributions
sudo service {cassandra|frontline|nginx} {start|stop}
# On systemd-based distributions
sudo systemctl {start|stop} {cassandra|frontline|nginx}

Installation Layout

Two users will be created, cassandra and frontline, that will be used by, respectively, Cassandra and Gatling Enterprise.

Installation and configuration directories:

/opt/cassandra
/opt/frontline

Nginx is installed using the packager of the distribution.

All other dependencies (I.e.: builders), are also installed in /opt.

Versions are installed in their own directories and linked to /opt/cassandra and/or /opt/frontline. Previous configuration files won’t be overwritten on update.

Home and data directories:

/var/lib/cassandra
/var/frontline

SystemV configuration files:

/etc/sysconfig/cassandra
/etc/sysconfig/frontline

Any changes to the PATH of each service can be pushed in these files.

SystemV services files:

/etc/init.d/cassandra
/etc/init.d/frontline

Systemd unit files:

/etc/systemd/system/cassandra.service
/etc/systemd/system/frontline.service

Logging directories:

/var/log/cassandra
/var/log/frontline

Troubleshooting

If anything goes wrong during the installation. You can turn on Ansible logging by modifying the following line in the frontline.yml file, switching the value of no_log from True to False:

no_log: False

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