install ansible on Debian/Ubuntu and RedHat/CentOS/Rocky

install-ansible.sh

#!/usr/bin/env bash

# A script to install ansible as per:
# https://docs.ansible.com/ansible/latest/installation_guide/intro_installation.html
#
# For Debian/Ubuntu and RedHat/CentOS


#
# Installation functions
#

# -- Ubuntu --
install_ansible_ubuntu() {
    echo "runninng install_ansible_ubuntu";
    export DEBIAN_FRONTEND=noninteractive;
    sudo apt update -q || { echo "ERROR: 'apt update' failed"; exit 1; }
    sudo apt install -y -q software-properties-common || { echo "ERROR: failed apt install software-properties-common"; exit 1; }
    sudo apt-add-repository --yes --update ppa:ansible/ansible || { echo "ERROR: failed to add ansible repo"; exit 1; }
    sudo apt install -y -q ansible || { echo "ERROR: failed to apt install ansible"; exit 1; }
}

# -- Debian --
install_ansible_debian() {
    echo "running install_ansible_debian";
    export DEBIAN_FRONTEND=noninteractive;
    sudo apt-get install ansible -y;
}

# -- RHEL --
install_ansible_rhel() {
    echo "running install_ansible_rhel";
    sudo yum install ansible -y;
}


#
# system checks
#

# test we can either use sudo, or are running as root.
sudo id | grep -q "uid=0(root)" || { echo "ERROR: can not sudo"; exit 1; }


#
# install Ansible
#

echo "starting install-ansible.sh" | logger

# -- Debian / Ubuntu --
if [ -f "/etc/debian_version" ]; then
    # try ubuntu first
    lsb_release -id | grep -q -i ubuntu && install_ansible_ubuntu
    # try debian
    lsb_release -id | grep -q -i debian && install_ansible_debian
fi

# -- RHEL --
if [ -f "/etc/redhat-release" ]; then
    install_ansible_rhel;
fi

# test
if ! [ -x "$(command -v ansible-playbook --version)" ]; then
    echo "ERROR: can not execute ansible-playbook - error installing ansible"
    exit 1;
fi


#
# done
#

echo "finished install-ansible.sh" | logger